CHEMISTRY- PAGE 1
1. Ionization energy of Na would be numerically same as
(a). Electron affinity of Na+
(b). electronegativity of Na+
(c). Ionization potential of Mg
(d). Electron affinity of Ne
Answer: Electron affinity of Na+
2. The most powerful oxidizing agent among the halogen is
(a). Fluorine
(b). Bromine
(c). Chlorine
(d). Iodine
Answer: Fluorine
3. Spitting of silver is prevented by covering the molten metal with a layer of
(a). Ag2S
(b). Ag2O
(c). NaCl
(d). Charcoal
Answer: Charcoal
4.The tarnishing of silver in air is due to the formation of thin layer of
(a). Ag2S
(b). Ag2O
(c). NaCl
(d). Charcoal
Answer: Ag2S
5 The ionization energy of Boron is lower than that of Beryllium because of
(a). Greater attraction of electrons by the nucleus
(b). Size of Beryllium atom being smaller
(c). Stable electronic configuration
(d). Shielding of 2p electrons by 2s electrons
Answer: Shielding of 2p electrons by 2s electrons
6. Ionization energy of nitrogen is greater than that of oxygen because of
(a). Completely filled 2p orbitals of N atom
(b). Half filled 2p orbitals of N atom
(c). Completely filled 2p orbitals of O atom
(d). Half filled 2p orbitals of O atom
Answer: Half filled 2p orbitals of N atom
7. Which one of the following is more stable?
(a). N2O5
(b). SbH3
(c). PH3
(d). BiH3
Answer: PH3
8. Which of the following hydrides is unstable?
(a). NH3
(b). AsH3
(c). PH3
(d). BiH3
Answer: BiH3
9. The products obtained when phosphorus trioxide is treated with hot water are
(a). Phosphorus and phosphorus acid
(b). Chlorine and phosphine
(c). Phosphine and phosphoric acid
(d). Phosphorus acid and phosphoric acid
Answer: Phosphine and phosphoric acid
10. The phosphorus compound with garlic odor is
(a). PH3
(b). PCl3
(c). P2O3
(d). HPO3
Answer: P2O3
11. When the solution of P2O5 in water is boiled, it gives
(a). Phosphorus acid
(b). Orthophosphoric acid
(c). Metaphosphoric acid
(d). Pyrophosphoric acid
Answer: Orthophosphoric acid
12. The catalyst used in the preparation of Orthophosphoric acid is
(a). Copper
(b). Bromine
(c). Iodine
(d). Iron
Answer: Iodine
13. Pyrophosphoric acid is obtained by heating
(a). H3PO3
(b). HPO3
(c). H3PO4
(d). PCl5
Answer: H3PO4
14. The electronic configuration of the element with atomic number 29 is
(a). (Ar) 4s1 3d10
(b). (Ar) 4s2 3d9
(c). (Ar) 4s1 3d10
(d). (Ar) 4s2 3d10
Answer: (Ar) 4s1 3d10
15. Phosphorus acid is a
(a). Monobasic acid
(b). Dibasic acid
(c). Tribasic acid
(d). Tetra basic acid
Answer: Dibasic acid
16. Which one of the following is a Dibasic acid?
(a). H3PO3
(b). HCl
(c). H3PO4
(d). HNO3
Answer: H3PO3
17. Which one of the following pairs of compounds is used in Holme's signals?
(a). Calcium carbide and calcium phosphate
(b). Calcium carbonate and calcium phosphide
(c). Calcium carbide and calcium phosphite
(d). Calcium carbide and calcium phosphide
Answer: Calcium carbide and calcium phosphide
18. The number of unpaired electrons in Cr3+ ion is (atomic number of Cr is 24)
(a). Three
(b). Five
(c). One
(d). Seven
Answer: Three
19. In the process of chrome plating
(a). Iron-chromium alloy is beaten into thin plates
(b). Chromium is dissolved electrically from an object containing chromium
(c). Chromium is deposited electrolytically over an object from chromic acid
(d). An object is covered with a thin foil of chromium
Answer: Chromium is deposited electrolytically over an object from chromic acid
20. Which one of the following oxyacids of phosphorus has a different oxidation number from the other three?
(a). H3PO3
(b). HPO3
(c). H4P2O7
(d). H3PO4
Answer: H3PO3
21. Which one of the following is a powerful reducing agent?
(a). H3PO3
(b). PCl3
(c). H3PO4
(d). PCl5
Answer: H3PO3
22. Important ore of manganese is
(a). Pyrolusite
(b). Lead
(c). Chromite
(d). Sulphur
Answer: Pyrolusite
23. German silver is an alloy of
(a). Cu, Zn, Ag
(b). Cu, Ni, Pb
(c). Cu, Sn, Ni
(d). Cu, Ni, Zn
Answer: Cu, Ni, Zn
24. Which one of the following elements is most electronegative?
(a). Cs
(b). Ca
(c). I
(d). F
Answer: F
25. From sodium argentocyanide, Na[Ag(CN)2], silver is precipitated by adding
(a). Tin
(b). Mercury
(c). Zinc
(d). Calcium
Answer: Zinc
26. Which one of the following is an end product of the radioactive decay?
(a). Thorium
(b). Lead
(c).Neptunium
(d).Uranium
Answer: Lead
(a). Electron affinity of Na+
(b). electronegativity of Na+
(c). Ionization potential of Mg
(d). Electron affinity of Ne
Answer: Electron affinity of Na+
2. The most powerful oxidizing agent among the halogen is
(a). Fluorine
(b). Bromine
(c). Chlorine
(d). Iodine
Answer: Fluorine
3. Spitting of silver is prevented by covering the molten metal with a layer of
(a). Ag2S
(b). Ag2O
(c). NaCl
(d). Charcoal
Answer: Charcoal
4.The tarnishing of silver in air is due to the formation of thin layer of
(a). Ag2S
(b). Ag2O
(c). NaCl
(d). Charcoal
Answer: Ag2S
5 The ionization energy of Boron is lower than that of Beryllium because of
(a). Greater attraction of electrons by the nucleus
(b). Size of Beryllium atom being smaller
(c). Stable electronic configuration
(d). Shielding of 2p electrons by 2s electrons
Answer: Shielding of 2p electrons by 2s electrons
6. Ionization energy of nitrogen is greater than that of oxygen because of
(a). Completely filled 2p orbitals of N atom
(b). Half filled 2p orbitals of N atom
(c). Completely filled 2p orbitals of O atom
(d). Half filled 2p orbitals of O atom
Answer: Half filled 2p orbitals of N atom
7. Which one of the following is more stable?
(a). N2O5
(b). SbH3
(c). PH3
(d). BiH3
Answer: PH3
8. Which of the following hydrides is unstable?
(a). NH3
(b). AsH3
(c). PH3
(d). BiH3
Answer: BiH3
9. The products obtained when phosphorus trioxide is treated with hot water are
(a). Phosphorus and phosphorus acid
(b). Chlorine and phosphine
(c). Phosphine and phosphoric acid
(d). Phosphorus acid and phosphoric acid
Answer: Phosphine and phosphoric acid
10. The phosphorus compound with garlic odor is
(a). PH3
(b). PCl3
(c). P2O3
(d). HPO3
Answer: P2O3
11. When the solution of P2O5 in water is boiled, it gives
(a). Phosphorus acid
(b). Orthophosphoric acid
(c). Metaphosphoric acid
(d). Pyrophosphoric acid
Answer: Orthophosphoric acid
12. The catalyst used in the preparation of Orthophosphoric acid is
(a). Copper
(b). Bromine
(c). Iodine
(d). Iron
Answer: Iodine
13. Pyrophosphoric acid is obtained by heating
(a). H3PO3
(b). HPO3
(c). H3PO4
(d). PCl5
Answer: H3PO4
14. The electronic configuration of the element with atomic number 29 is
(a). (Ar) 4s1 3d10
(b). (Ar) 4s2 3d9
(c). (Ar) 4s1 3d10
(d). (Ar) 4s2 3d10
Answer: (Ar) 4s1 3d10
15. Phosphorus acid is a
(a). Monobasic acid
(b). Dibasic acid
(c). Tribasic acid
(d). Tetra basic acid
Answer: Dibasic acid
16. Which one of the following is a Dibasic acid?
(a). H3PO3
(b). HCl
(c). H3PO4
(d). HNO3
Answer: H3PO3
17. Which one of the following pairs of compounds is used in Holme's signals?
(a). Calcium carbide and calcium phosphate
(b). Calcium carbonate and calcium phosphide
(c). Calcium carbide and calcium phosphite
(d). Calcium carbide and calcium phosphide
Answer: Calcium carbide and calcium phosphide
18. The number of unpaired electrons in Cr3+ ion is (atomic number of Cr is 24)
(a). Three
(b). Five
(c). One
(d). Seven
Answer: Three
19. In the process of chrome plating
(a). Iron-chromium alloy is beaten into thin plates
(b). Chromium is dissolved electrically from an object containing chromium
(c). Chromium is deposited electrolytically over an object from chromic acid
(d). An object is covered with a thin foil of chromium
Answer: Chromium is deposited electrolytically over an object from chromic acid
20. Which one of the following oxyacids of phosphorus has a different oxidation number from the other three?
(a). H3PO3
(b). HPO3
(c). H4P2O7
(d). H3PO4
Answer: H3PO3
21. Which one of the following is a powerful reducing agent?
(a). H3PO3
(b). PCl3
(c). H3PO4
(d). PCl5
Answer: H3PO3
22. Important ore of manganese is
(a). Pyrolusite
(b). Lead
(c). Chromite
(d). Sulphur
Answer: Pyrolusite
23. German silver is an alloy of
(a). Cu, Zn, Ag
(b). Cu, Ni, Pb
(c). Cu, Sn, Ni
(d). Cu, Ni, Zn
Answer: Cu, Ni, Zn
24. Which one of the following elements is most electronegative?
(a). Cs
(b). Ca
(c). I
(d). F
Answer: F
25. From sodium argentocyanide, Na[Ag(CN)2], silver is precipitated by adding
(a). Tin
(b). Mercury
(c). Zinc
(d). Calcium
Answer: Zinc
26. Which one of the following is an end product of the radioactive decay?
(a). Thorium
(b). Lead
(c).Neptunium
(d).Uranium
Answer: Lead
27. pH number of an acid will be______________
A:-less than 7
B:-equal to 7
C:-greater than 7
D:-None of these
Correct Answer:- Option-A
28. Solubility of gases in liquid ______________ with rise in temperature.
A:-increases
B:-decreases
C:-may increase or decrease
D:-will not change
Correct Answer:- Option-B
A:-less than 7
B:-equal to 7
C:-greater than 7
D:-None of these
Correct Answer:- Option-A
28. Solubility of gases in liquid ______________ with rise in temperature.
A:-increases
B:-decreases
C:-may increase or decrease
D:-will not change
Correct Answer:- Option-B
29. Two or more compounds that have same chemical formula but different arrangement of atoms are called_____________
A:-Isotopes
B:-Isobars
C:-Isomers
D:-Polymers
Correct Answer:- Option-C
30. A qualitative measure of the ability of an atom in a chemical compound to attract shared electrons to itself is called ________________
A:-Electronegativity
B:-Molar mass
C:-Enthalpy
D:-Entropy
Correct Answer:- Option-A
A:-Isotopes
B:-Isobars
C:-Isomers
D:-Polymers
Correct Answer:- Option-C
30. A qualitative measure of the ability of an atom in a chemical compound to attract shared electrons to itself is called ________________
A:-Electronegativity
B:-Molar mass
C:-Enthalpy
D:-Entropy
Correct Answer:- Option-A
31. The electric field inside a uniformly charged thin spherical shell is
A:-1
B:-0
C:-infinity
D:-10
Ans: B
32. Heamoglobin is a coordination compound in which the central metal atom is
A:-Sodium
B:-Magnesium
C:-Manganese
D:-Iron
Ans: D
33. Which of the following will have highest boiling point
A:-2-methylbutane
B:-n-heptane
C:-n-hexane
D:-2,2-dimethylbutane
Ans: B
34. The shape of ammonia molecule is
A:-tetrahedral
B:-linear
C:-pyramidal
D:-planar
Ans: C
35. According to Lewis concept acid is
A:-Proton donor
B:-Proton acceptor
C:-Electron pair donor
D:-Electron pair acceptor
Ans: D
A:-1
B:-0
C:-infinity
D:-10
Ans: B
32. Heamoglobin is a coordination compound in which the central metal atom is
A:-Sodium
B:-Magnesium
C:-Manganese
D:-Iron
Ans: D
33. Which of the following will have highest boiling point
A:-2-methylbutane
B:-n-heptane
C:-n-hexane
D:-2,2-dimethylbutane
Ans: B
34. The shape of ammonia molecule is
A:-tetrahedral
B:-linear
C:-pyramidal
D:-planar
Ans: C
35. According to Lewis concept acid is
A:-Proton donor
B:-Proton acceptor
C:-Electron pair donor
D:-Electron pair acceptor
Ans: D
36:-The chemical formula of smelling salt is
A:-Sodium carbonate
B:-Ammonium carbonate
C:-Ammonium bicarbonate
D:-Sodium bicarbonate
Ans: B
37:-Which of the following element is most electronegative
A:-Oxygen
B:-Chlorine
C:-Fluorine
D:-Nitrogen
Ans: C
38:-The size of weather baloon becomes larger and larger as it ascends up into higher altitude which gas law is applicable here
A:-Boyle s Law
B:-Charle s Law
C:-Avogadrow Law
D:-Gay Lussac s Law
Ans: A
39:-Which one of the following subshell is not possible
A:-4d
B:-5s
C:-3f
D:-2p
Ans: C
40:-Bauxite is the ore of
A:-Copper
B:-Zinc
C:-Iron
D:-Aluminium
Ans: D
41:-The gas liberate when Hydrochloric Acid react with water
A:-Oxygen
B:-Hydrogen
C:-Nitrogen
D:-Chorine
Ans: B
42:-The pH of pure water
A:-4
B:-9
C:-7
D:-0
Ans: C
43:-The oxydation number of sulphur in sulphuric acid is
A:-4
B:-2
C:-8
D:-6
Ans: D
44:-What is meant by MSG
A:-Mono Sodium Glutamate
B:-Meta Sodium Glucose
C:-Mono Sodium Glucose
D:-Meta Sodium Glutamate
Ans: A
45:-Organic compounds contain triple bonds between carbon atoms are called
A:-Alkene
B:-Alkyne
C:-Alkane
D:-Benzene
Ans: B
A:-Sodium carbonate
B:-Ammonium carbonate
C:-Ammonium bicarbonate
D:-Sodium bicarbonate
Ans: B
37:-Which of the following element is most electronegative
A:-Oxygen
B:-Chlorine
C:-Fluorine
D:-Nitrogen
Ans: C
38:-The size of weather baloon becomes larger and larger as it ascends up into higher altitude which gas law is applicable here
A:-Boyle s Law
B:-Charle s Law
C:-Avogadrow Law
D:-Gay Lussac s Law
Ans: A
39:-Which one of the following subshell is not possible
A:-4d
B:-5s
C:-3f
D:-2p
Ans: C
40:-Bauxite is the ore of
A:-Copper
B:-Zinc
C:-Iron
D:-Aluminium
Ans: D
41:-The gas liberate when Hydrochloric Acid react with water
A:-Oxygen
B:-Hydrogen
C:-Nitrogen
D:-Chorine
Ans: B
42:-The pH of pure water
A:-4
B:-9
C:-7
D:-0
Ans: C
43:-The oxydation number of sulphur in sulphuric acid is
A:-4
B:-2
C:-8
D:-6
Ans: D
44:-What is meant by MSG
A:-Mono Sodium Glutamate
B:-Meta Sodium Glucose
C:-Mono Sodium Glucose
D:-Meta Sodium Glutamate
Ans: A
45:-Organic compounds contain triple bonds between carbon atoms are called
A:-Alkene
B:-Alkyne
C:-Alkane
D:-Benzene
Ans: B
46:-Myrcene is a
A:-Monocyclic terpenoid
B:-Bicyclic terpenoid
C:-Acyclic terpenoid
D:-Sesqui terpenoid
Ans: C
47:-Geometrical isomer of geraniol is
A:-Nerol
B:-Linalool
C:-Citranellol
D:-Citranellal
Ans: A
48:-Gutta-Percha is
A:-cis-polyisoprene
B:-trans-polyisoprene
C:-cis-polyisobutylene
D:-trans-polyisobutylene
Ans: B
49:-Which one of these is a quinoline alkaloid ?
A:-Nicotine
B:-Cocaine
C:-Atropine
D:-Cinchonine
Ans: D
50:-Mercerised cotton is
A:-Cotton treated with NaOH
B:-Cotton treated with KOH
C:-Cotton treated with `HNO_(3)`
D:-None of these
Ans: A
51:-Oil of winter green
A:-Acetyl salicylic acid
B:-Ethyl salicylate
C:-Methyl salicylate
D:-None of these
Ans: C
A:-Monocyclic terpenoid
B:-Bicyclic terpenoid
C:-Acyclic terpenoid
D:-Sesqui terpenoid
Ans: C
47:-Geometrical isomer of geraniol is
A:-Nerol
B:-Linalool
C:-Citranellol
D:-Citranellal
Ans: A
48:-Gutta-Percha is
A:-cis-polyisoprene
B:-trans-polyisoprene
C:-cis-polyisobutylene
D:-trans-polyisobutylene
Ans: B
49:-Which one of these is a quinoline alkaloid ?
A:-Nicotine
B:-Cocaine
C:-Atropine
D:-Cinchonine
Ans: D
50:-Mercerised cotton is
A:-Cotton treated with NaOH
B:-Cotton treated with KOH
C:-Cotton treated with `HNO_(3)`
D:-None of these
Ans: A
51:-Oil of winter green
A:-Acetyl salicylic acid
B:-Ethyl salicylate
C:-Methyl salicylate
D:-None of these
Ans: C
52:-Which is true about the isobars ?
A:-They have same mass number and same atomic number
B:-They have same mass number and different atomic number
C:-They have different mass number and same atomic number
D:-They have different mass number and different atomic number
Ans: B
53:-`CO_2` is isostructural with
A:-`H_2O_`
B:-`NO_2`
C:-`H_2S_`
D:-`C_2H_2`
Ans: D
54:-According to Wade's rule, `C_2B_4H_8` adopts
A:-Closo-structure
B:-Arachno-structure
C:-Nido-structure
D:-Hypho-structure
Ans: C
55:-Which is more basic ?
A:-Pyridine
B:-Pyrimidine
C:-Pyrrole
D:-Piperidine
Ans: D
56:-Oxygen has nuclear spin 5/2. The NMR of Oxygen gives _______.
(A) 3 lines (B) 2 lines (C) 6 lines (D) 4 lines
Ans: C
57:-Which one of the following is a vat dye ?
A:-Alizarin
B:-Indigo
C:-Malachite green
D:-Martius yellow
Ans: B
58:-Patterno-Buchi reaction is
A:-Rearrangement of `alpha`, `beta`-unsaturated ketone
B:-Photosensitisation of butadiene
C:-Photochemical oxidation
D:-Cycloaddition of carbonyl compound to alkene
Ans: D
59:-An antiredeposition agent in detergents
A:-STPP
B:-CMC
C:-SDS
D:-Sodium perborate
Ans: B
60:-p-azoxyanisole is an example of
A:-Semiconductor
B:-Super conductor
C:-Liquid crystal
D:-None of these
Ans: C
61:-Which of the following will occur farthest downfield in `^1H`-`NMR` spectrum ?
A:-Benzene
B:-Ethyne
C:-Dimethyl ether
D:-Formaldehyde
Ans: D
62:-One mole of sugar is dissolved in three mole of water. The relative lowering of vapour pressure is
A:-1/2
B:-1/3
C:-1/4
D:-1/5
Ans: C
63:-The electrode potential of hydrogen electrode in neutral solution and 298 K is
(A) + 0.41 V
(B) Zero
(C) –0.41 V
(D) –0.49 V
Ans: C
64:-Isotonic solutions have
A:-Same freezing point
B:-Same boiling point
C:-Same viscosity
D:-Same osmotic pressure
Ans: D
65:-The metal ion present in phosphotransferase enzyme is
A:-Mg
B:-Fe
C:-P
D:-Ni
Ans: A
66: The solid crystal NaCl belongs to the following structure:
(A) Hexagonal (B) Tetragonal (C) Single cubic (D) Monoclinic
Ans: C
67:-The rate of reaction depends on
(A) Enthalpy of reaction only (B) Enthalpy and temperature of reaction only
(C) Entropy and temperature of reaction only (D) Enthalpy, entropy and temperature of reaction.
Ans: D
68:-Which of the following pairs has the highest difference in their first ionization energy ?
A:-Xe, Cs
B:-Kr, Rb
C:-Ar, K
D:-Ne, Na
Ans: D
A:-They have same mass number and same atomic number
B:-They have same mass number and different atomic number
C:-They have different mass number and same atomic number
D:-They have different mass number and different atomic number
Ans: B
53:-`CO_2` is isostructural with
A:-`H_2O_`
B:-`NO_2`
C:-`H_2S_`
D:-`C_2H_2`
Ans: D
54:-According to Wade's rule, `C_2B_4H_8` adopts
A:-Closo-structure
B:-Arachno-structure
C:-Nido-structure
D:-Hypho-structure
Ans: C
55:-Which is more basic ?
A:-Pyridine
B:-Pyrimidine
C:-Pyrrole
D:-Piperidine
Ans: D
56:-Oxygen has nuclear spin 5/2. The NMR of Oxygen gives _______.
(A) 3 lines (B) 2 lines (C) 6 lines (D) 4 lines
Ans: C
57:-Which one of the following is a vat dye ?
A:-Alizarin
B:-Indigo
C:-Malachite green
D:-Martius yellow
Ans: B
58:-Patterno-Buchi reaction is
A:-Rearrangement of `alpha`, `beta`-unsaturated ketone
B:-Photosensitisation of butadiene
C:-Photochemical oxidation
D:-Cycloaddition of carbonyl compound to alkene
Ans: D
59:-An antiredeposition agent in detergents
A:-STPP
B:-CMC
C:-SDS
D:-Sodium perborate
Ans: B
60:-p-azoxyanisole is an example of
A:-Semiconductor
B:-Super conductor
C:-Liquid crystal
D:-None of these
Ans: C
61:-Which of the following will occur farthest downfield in `^1H`-`NMR` spectrum ?
A:-Benzene
B:-Ethyne
C:-Dimethyl ether
D:-Formaldehyde
Ans: D
62:-One mole of sugar is dissolved in three mole of water. The relative lowering of vapour pressure is
A:-1/2
B:-1/3
C:-1/4
D:-1/5
Ans: C
63:-The electrode potential of hydrogen electrode in neutral solution and 298 K is
(A) + 0.41 V
(B) Zero
(C) –0.41 V
(D) –0.49 V
Ans: C
64:-Isotonic solutions have
A:-Same freezing point
B:-Same boiling point
C:-Same viscosity
D:-Same osmotic pressure
Ans: D
65:-The metal ion present in phosphotransferase enzyme is
A:-Mg
B:-Fe
C:-P
D:-Ni
Ans: A
66: The solid crystal NaCl belongs to the following structure:
(A) Hexagonal (B) Tetragonal (C) Single cubic (D) Monoclinic
Ans: C
67:-The rate of reaction depends on
(A) Enthalpy of reaction only (B) Enthalpy and temperature of reaction only
(C) Entropy and temperature of reaction only (D) Enthalpy, entropy and temperature of reaction.
Ans: D
68:-Which of the following pairs has the highest difference in their first ionization energy ?
A:-Xe, Cs
B:-Kr, Rb
C:-Ar, K
D:-Ne, Na
Ans: D
69:- ‘Fluorosis’ disease is caused due to the reaction of _________ with excess of fluoride in the body
(A) K (B) Mg (C) Fe (D) Ca
Ans: D
70:-In which method the voltage applied across the indicator electrode and reference electrode is kept constant and the current passing through the cell is measured and plotted against the volume of reagent ?
A:-Amperometry
B:-Voltametry
C:-Polarography
D:-Conductometry
Ans: A
71:-Two strands in DNA are held together by ______.
(A) van der Waal’s forces (B) Hydrogen bonds (C) Electrostatic force (D) Covalent bonds
Ans: B
72:-Atomic force microscopy shows images of surfaces through :
A:-Current that flows from the surface to the tip
B:-The force of the surface on the tip
C:-Diffraction of electrons around the molecules of the surface
D:-Movement of the laser along the surface
Ans: B
73:-Identify the non-aromatic compound in the following :
A:-Cyclodecapentene
B:-Annulene
C:-Cyclooctatetraene
D:-Cyclopropenyl anion
Ans: A
74:-Wave function in quantum mechanics represents :
A:-Probability of the system
B:-Shape of the system
C:-Energy of the system
D:-A state of the system
Ans: D
75:-The point group symmetry of the staggered form of ethane molecule is :
A:-`C_(3v)`
B:-`D_(3d)`
C:-`D_(3h)`
D:-`D_3`
Ans: B
76:-STM shows images of atoms based on :
A:-The thickness of the atom
B:-The mass of the atom
C:-Friction caused by rubbing the tip of the atom
D:-The amount of tunneling current
Ans: D
77:-Which of the following heterocyclic compound is not aromatic ?
A:-Pyridine
B:-Pyrrole
C:-Furan
D:-Piperidine
Ans: D
78:-Free radicals are detected by the :
A:-Mass spectra
B:-U.V. spectra
C:-CIDNP
D:-Mossbauer spectra
Ans: C
79:-A class of pericyclic reaction is :
A:-Hydroboration reaction
B:-Reimer - Tiemann reaction
C:-Grignard reaction
D:-Diels - Alder reaction
Ans: D
80:-In the R-S notation, the prefixes R and S stands for :
A:-Rectus-Simiantus
B:-Rectus-Sinister
C:-Rotamer-Simiantus
D:-Rotamer-Sinister
Ans: B
81:-Which among the following will be paramagnetic ?
A:-`Cr(CO)_6
B:-`Fe(CO)_5
C:-`Fe_2(CO)_9`
D:-`V(CO)_6`
Ans: D
82:-The difference between the potential of the electrode when the gas evolution was actually observed and the theoretical reversible value of the same solution was called :
A:-Electrode potential
B:-Over potential
C:-Decomposition potential
D:-None of these
Ans: B
83:-Which method detects the smallest particles ?
A:-LFM
B:-AFM
C:-SEM
D:-STM
Ans: D
84:-Which is an example for natural inorganic anion exchanger ?
A:-Wood
B:-MgO
C:-Dolomite
D:-Polymeric resin
Ans: C
85:-Enantiotropic groups reacts with chiral reagents :
A:-At different rates
B:-At the same rate
C:-Same rate at the first and different rates later
D:-Do not react at all
Ans: A
86:-Which element is used for making a thin window at one end of the tube in Geiger counter ?
A:-Li
B:-Be
C:-B
D:-C
Ans: B
87:-Name the first space-based Michelson Interferometer designed for detecting gravitational waves.
A:-VISA
B:-MISA
C:-NISA
D:-LISA
Ans: D
88:- Oxidising agent usually used in determination of COD is _______.
(A) Ozone (B) Potassium dichromate (C) Hydrogen peroxide (D) Potassium Permanganate
Ans: B
89:-The electron transition between which two levels release the most energy ?
A:-Second to first
B:-Fourth to ninth
C:-Sixth to third
D:-First to third
Ans: A
90:-What is the function of iron in the Haber process ?
A:-It shifts the position of equilibrium towards the products
B:-It decreases the rate of the reaction
C:-It provides an alternative reaction pathway with lower activation energy
D:-It reduces the enthalpy change of the reaction
Ans: C
(A) K (B) Mg (C) Fe (D) Ca
Ans: D
70:-In which method the voltage applied across the indicator electrode and reference electrode is kept constant and the current passing through the cell is measured and plotted against the volume of reagent ?
A:-Amperometry
B:-Voltametry
C:-Polarography
D:-Conductometry
Ans: A
71:-Two strands in DNA are held together by ______.
(A) van der Waal’s forces (B) Hydrogen bonds (C) Electrostatic force (D) Covalent bonds
Ans: B
72:-Atomic force microscopy shows images of surfaces through :
A:-Current that flows from the surface to the tip
B:-The force of the surface on the tip
C:-Diffraction of electrons around the molecules of the surface
D:-Movement of the laser along the surface
Ans: B
73:-Identify the non-aromatic compound in the following :
A:-Cyclodecapentene
B:-Annulene
C:-Cyclooctatetraene
D:-Cyclopropenyl anion
Ans: A
74:-Wave function in quantum mechanics represents :
A:-Probability of the system
B:-Shape of the system
C:-Energy of the system
D:-A state of the system
Ans: D
75:-The point group symmetry of the staggered form of ethane molecule is :
A:-`C_(3v)`
B:-`D_(3d)`
C:-`D_(3h)`
D:-`D_3`
Ans: B
76:-STM shows images of atoms based on :
A:-The thickness of the atom
B:-The mass of the atom
C:-Friction caused by rubbing the tip of the atom
D:-The amount of tunneling current
Ans: D
77:-Which of the following heterocyclic compound is not aromatic ?
A:-Pyridine
B:-Pyrrole
C:-Furan
D:-Piperidine
Ans: D
78:-Free radicals are detected by the :
A:-Mass spectra
B:-U.V. spectra
C:-CIDNP
D:-Mossbauer spectra
Ans: C
79:-A class of pericyclic reaction is :
A:-Hydroboration reaction
B:-Reimer - Tiemann reaction
C:-Grignard reaction
D:-Diels - Alder reaction
Ans: D
80:-In the R-S notation, the prefixes R and S stands for :
A:-Rectus-Simiantus
B:-Rectus-Sinister
C:-Rotamer-Simiantus
D:-Rotamer-Sinister
Ans: B
81:-Which among the following will be paramagnetic ?
A:-`Cr(CO)_6
B:-`Fe(CO)_5
C:-`Fe_2(CO)_9`
D:-`V(CO)_6`
Ans: D
82:-The difference between the potential of the electrode when the gas evolution was actually observed and the theoretical reversible value of the same solution was called :
A:-Electrode potential
B:-Over potential
C:-Decomposition potential
D:-None of these
Ans: B
83:-Which method detects the smallest particles ?
A:-LFM
B:-AFM
C:-SEM
D:-STM
Ans: D
84:-Which is an example for natural inorganic anion exchanger ?
A:-Wood
B:-MgO
C:-Dolomite
D:-Polymeric resin
Ans: C
85:-Enantiotropic groups reacts with chiral reagents :
A:-At different rates
B:-At the same rate
C:-Same rate at the first and different rates later
D:-Do not react at all
Ans: A
86:-Which element is used for making a thin window at one end of the tube in Geiger counter ?
A:-Li
B:-Be
C:-B
D:-C
Ans: B
87:-Name the first space-based Michelson Interferometer designed for detecting gravitational waves.
A:-VISA
B:-MISA
C:-NISA
D:-LISA
Ans: D
88:- Oxidising agent usually used in determination of COD is _______.
(A) Ozone (B) Potassium dichromate (C) Hydrogen peroxide (D) Potassium Permanganate
Ans: B
89:-The electron transition between which two levels release the most energy ?
A:-Second to first
B:-Fourth to ninth
C:-Sixth to third
D:-First to third
Ans: A
90:-What is the function of iron in the Haber process ?
A:-It shifts the position of equilibrium towards the products
B:-It decreases the rate of the reaction
C:-It provides an alternative reaction pathway with lower activation energy
D:-It reduces the enthalpy change of the reaction
Ans: C
91:-Identify the non-benzenoid aromatic compound in the following :
A:-Phenanthrene
B:-Pyrene
C:-Coronene
D:-Ferrocene
Ans: D
92:-During polarographic analysis in which medium Molybdenum gives two waves at -0.37 V and -0.30 V.
A:-`HNO_3`
B:-`H_2SO_4`
C:-HCl
D:-HF
Ans: A
93:- Zeta potential is also known as ____________.
(A) Electrophoretic potential (B) Electroosmosis potential (C) Electrokinetic potential (D) Electromeric potential
Ans: C
94:-Who used silica gel packed column as a support for a stationary phase and were awarded Nobel Prize in 1952 ?
A:-David day and Mikhail tswett
B:-Kirtchevesky and Tiselius
C:-Martin and Synge
D:-Consden and Gorden
Ans: C
95:-Mossbauer effect is also related with resonance fluorescence of :
A:-`x-rays
B:-`gamma`-rays
C:-`beta`-rays
D:-`alpha`-rays
Ans: B
96:-Which of the following is microwave inactive ?
A:-`Cl_2`
B:-NO
C:-HCl
D:-CO
Ans: A
97:-The polarographic limiting current which are controlled not only by the rate of diffusion of the reactive species, but also by the rate of some chemical reaction related to the electrode process are known as :
A:-Diffusion current
B:-Residual current
C:-Migration current
D:-Kinetic current
Ans: D
98:-Addition of `Br_2` to methyl acetylene yielding trans 1,2-trans 1,2-dibromopropene is :
A:-Stereoselective and stereospecific
B:-Stereospecific
C:-Stereoselective
D:-None of these
Ans: C
99:-Who proposed the dead stop end point method in amperometry ?
A:-Bawden
B:-Foulk
C:-Neuberger
D:-Cooke
Ans: B
100:-The best method to determine the size of the Au nanoparticles is :
A:-STM
B:-SEM
C:-AFM
D:-LFM
Ans: B
A:-Phenanthrene
B:-Pyrene
C:-Coronene
D:-Ferrocene
Ans: D
92:-During polarographic analysis in which medium Molybdenum gives two waves at -0.37 V and -0.30 V.
A:-`HNO_3`
B:-`H_2SO_4`
C:-HCl
D:-HF
Ans: A
93:- Zeta potential is also known as ____________.
(A) Electrophoretic potential (B) Electroosmosis potential (C) Electrokinetic potential (D) Electromeric potential
Ans: C
94:-Who used silica gel packed column as a support for a stationary phase and were awarded Nobel Prize in 1952 ?
A:-David day and Mikhail tswett
B:-Kirtchevesky and Tiselius
C:-Martin and Synge
D:-Consden and Gorden
Ans: C
95:-Mossbauer effect is also related with resonance fluorescence of :
A:-`x-rays
B:-`gamma`-rays
C:-`beta`-rays
D:-`alpha`-rays
Ans: B
96:-Which of the following is microwave inactive ?
A:-`Cl_2`
B:-NO
C:-HCl
D:-CO
Ans: A
97:-The polarographic limiting current which are controlled not only by the rate of diffusion of the reactive species, but also by the rate of some chemical reaction related to the electrode process are known as :
A:-Diffusion current
B:-Residual current
C:-Migration current
D:-Kinetic current
Ans: D
98:-Addition of `Br_2` to methyl acetylene yielding trans 1,2-trans 1,2-dibromopropene is :
A:-Stereoselective and stereospecific
B:-Stereospecific
C:-Stereoselective
D:-None of these
Ans: C
99:-Who proposed the dead stop end point method in amperometry ?
A:-Bawden
B:-Foulk
C:-Neuberger
D:-Cooke
Ans: B
100:-The best method to determine the size of the Au nanoparticles is :
A:-STM
B:-SEM
C:-AFM
D:-LFM
Ans: B