50 + Interview Questions in MCQS-FROM-PREVIOUS-BOARD-QUESTION-PAPERS IN GENERAL AWARENESS Page 1 InterviewSolution

1.	Which of the following is polymide?A. TeflonB. TeryleneC. Nylon 6,6D. Bakelite
Answer» Correct Answer - C

Discussion

2.	The molar conductivity of cation and anion of salt BA are 180 AND 220 mhos respectively. The molar conductivity of salt BA at infinite dilution is-A. 90 mhos. `cm^(2). Mol^(-1)`B. `110 mhos.cm^(2). Mol^(-1)`C. 200 mhos. `cm^(2). Mol^(-1)`D. 400 mhos. `cm^(2). Mol^(-1)`
Answer» Correct Answer - D

Discussion

3.	Which of the following carbocations is least stableA. `CH_(3)-CH_(2) -overset(CH_(2)-CH_(3))overset(\|)underset(CH_(2)-CH_(3))underset(\|)(C^(oplus))`B. `CH_(3)-CH_(2) -C^(oplus)H-CH_(2)-CH_(3)`C. `CH_(3)-CH_(2) - C^(oplus)H_(2)`D. `CH_(3)-CH_(2)-C^(oplus)H-overset(H)overset(\|)underset(CH_(3))underset(\|)C-CH_(3)`
Answer» Correct Answer - C

Discussion

4.	3-Methylbutane-2-ol on heating with HI givesA. 2-iodo-3-methylbutaneB. 2-iodo-2-methylbutaneC. 1-iodo-3-methylbuataneD. 1-iodo-2-methylbutane
Answer» Correct Answer - B

Discussion

5.	What is the molecular formula of chromyl chloride?A. `CrO_(2)Cl_(2)`B. `CrOCl_(2)`C. `CrCl_(3)`D. `Cr_(2)O"C"l_(2)`
Answer» Correct Answer - A

Discussion

6.	What is the molecular formula of oleum?A. `H_(2)SO_(3)`B. `H_(2)SO_(4)`C. `H_(2)S_(2)O_(7)`D. `H_(2)S_(2)O_(8)`
Answer» Correct Answer - C

Discussion

7.	The rate of reaction for certain reaction is expressed as :`1/3 (d[A])/(dt) = -1/2(d[B])/(dt) = -(d[C])/(dt)` The reaction is:A. `3A to 2B + C`B. `2B to 3A + C`C. `2B + C to 3A`D. `3A + 2B to C`
Answer» Correct Answer - A

Discussion

8.	Purification of aluminium by electrolytic refining is carried out byA. Hoope processB. Hall processC. Baeyer processD. Serperckprocess
Answer» Correct Answer - A

Discussion

9.	Triclinic crystal has the following the cell parameters:A. `alpha = beta = gamma = 90^(@)` and a=b=cB. `alpha ne beta ne gamma ne 90^(@)` and `a ne b ne c`C. `a = gamma = 90^(@), beta ne 90^(@)` and `a ne b ne c`D. `alpha = beta = gamma = 90^(@)` and `a ne b ne c`
Answer» Correct Answer - B

Discussion

10.	The temperature at which the vapour pressure of a liquid becomes equals to the external (atmospheric) pressure is itsA. melting pointB. boiling pointC. 273 KD. 373 K
Answer» Correct Answer - B

Discussion

11.	p-type semi-conductors are made by mixing silicon with impurities of-A. germaniumB. boronC. arsenicD. antimony
Answer» Correct Answer - B

Discussion

12.	What is the chemical composition of malachite?A. `CuO. CuCO_(3)`B. `Cu(OH)_(2).CuCO_(3)`C. `CuO. Cu(OH)_(2)`D. `Cu_(2)O.Cu(OH)_(2)`
Answer» Correct Answer - B

Discussion

13.	For a chemical reaction, `DeltaS = -0.035 kJ//K` and `DeltaH = -20 kJ`. At what temperature does the reaction turn spontaneous?A. 5.14 KB. 57.14 KC. 571.4 KD. 5714.0 K
Answer» Correct Answer - C

Discussion

14.	On calculating the strength of current in amperes if a charge of 840 C (coulomb) passes through an electrolyte in 7minutes, it will beA. 1B. 2C. 3D. 4
Answer» Correct option is: (B) 2 Current = \(\frac {Change (C)}{Time(s)} = \frac {840}{7\times 60(s)} \) Current = 2A Correct Answer - B

14.

On calculating the strength of current in amperes if a charge of 840 C (coulomb) passes through an electrolyte in 7minutes, it will beA. 1B. 2C. 3D. 4

Answer»

Correct option is: (B) 2

Current = \(\frac {Change (C)}{Time(s)} = \frac {840}{7\times 60(s)} \)

Current = 2A

Correct Answer - B

Discussion

15.	The hybridisation of phosphorus in phosphorus pentachlride isA. `dsp^(3)`B. `sp^(3)d`C. `sp^(3)d^(2)`D. `sp^(3)d^(2)`
Answer» Correct Answer - B

Discussion

16.	The rate constant for a first order reaction is 100 `S^(-1)`. The time required for completion of `50%` of reaction is-A. 0.0693 millisecondsB. 0.693 millisecondsC. 6.93 millisecondsD. 69.3 milliseconds
Answer» Correct Answer - C

Discussion

17.	Number of faradays of electricity required to liberate 12 g of hydrogen isA. 1B. 8C. 12D. 16
Answer» Correct option is: (c) 12 \(H^+ + e^- \rightarrow \frac 12 H_2\) ∵ 1 Faraday of electricity liberated = 0.5 mol \(H_2\) or 1 g of \(H_2\) ∴ To liberate 12g of Hydrogen we have to required 12 Faraday's of electricity Correct Answer - C

17.

Number of faradays of electricity required to liberate 12 g of hydrogen isA. 1B. 8C. 12D. 16

Answer»

Correct option is: (c) 12

\(H^+ + e^- \rightarrow \frac 12 H_2\)

∵ 1 Faraday of electricity liberated = 0.5 mol \(H_2\) or 1 g of \(H_2\)

∴ To liberate 12g of Hydrogen we have to required 12 Faraday's of electricity

Correct Answer - C

Discussion

18.	The integrated rate equation for first order reaction is A `to` products.A. k=2.303 t `log_(10) ([A]_(0))/([A]_(t))`B. `k=-1/t ln ([A]_(t))/([A]_(0))`C. `k=(2.303)/t log_(10)([A]_(t))/([A]_(0))`D. `k=1/2 ln ([A]_(t))/([A]_(0))`
Answer» Correct Answer - B

Discussion

19.	The element that does NOT exhibit allotropy is-A. AsB. SbC. BiD. N
Answer» Correct Answer - C

Discussion

20.	IUPAC name of `K_(4)[Fe(CN)_(6)]` is-A. tetrapotassium ferrocynaideB. potassium ferricyanideC. potassium ferrocyanideD. potassium hexacyanoferrate
Answer» Correct Answer - D

Discussion

21.	IUPAC name of `C_(6)H_(5) - overset(O)overset(\|\|)C - CH_(2)CH_(2)-CH_(2)-CH_(2)-CH_(3)`A. 1-phenylhexan-2-oneB. 6-phenylhexan-2-oneC. 1-benzylhexan - 2-oneD. Dodecan-5-one
Answer» Correct Answer - A

Discussion

22.	Which among the following molecular formuale represents urotropine?A. `C_(6)H_(12)N_(4)`B. `C_(6)H_(12)N_(4)O_(2)`C. `C_(6)H_(24)H_(4)`D. `C_(6)H_(24)N_(4)O_(2)`
Answer» Correct Answer - A

Discussion

23.	Iodine exists as-A. polar molecular solidB. ionic acidC. nonpolar molecular solidD. hydrogen bonded molecular solid
Answer» Correct Answer - C

Discussion

24.	The molecular formula `H_(2)S_(2)O_(2)` represents which oxoacid among the following?A. Hydrosulphurous acidB. Thiosulphuric acidC. Sulphuric acidD. Pyrosulphurous acid
Answer» Correct Answer - B

Discussion

25.	Which of the following reagents is best for the following conversion? A. `LiAlH_(4)`B. `H_(3)O^(+)`C. `H_(2)//Ni, 453 K`D. Zn-Hg + Conc. HCl
Answer» Correct Answer - A

Discussion

26.	Tertiary butyl amine is a-A. primary amineB. secondary amineC. tertiary amineD. quaternary ammonium salt
Answer» Correct Answer - A

Discussion

27.	Inflammation of tongue is due to the deficiency of __________.A. Vitamin `B_(1)`B. Vitamin `B_(2)`C. Vitamin `B_(5)`D. Vitamin `B_(6)`
Answer» Correct Answer - B

Discussion

28.	The Zieglar-Natta catalyst is used in the preparation ofA. LDPEB. PHBVC. PAND. HDPE
Answer» Correct Answer - D

Discussion

29.	Stachyose is an example ofA. monosaccharidesB. disaccharidesC. trisaccharidesD. tetrasaccharide
Answer» Correct Answer - D

Discussion

30.	`Fe_(2)O_(3)` is reduced to spongy iron near near the top of blast furnace byA. `H_(2)`B. CaOC. `SiO_(2)`D. CO
Answer» Correct Answer - D

Discussion

31.	Which of the following amines gives yellow oily liquid with nitrous acid?A. Ethyl amineB. Methyl amineC. Diethyl amineD. Triethyl amine
Answer» Correct Answer - C

Discussion

32.	When KOH solution is added to pottasium dichromate solution the colur of solution changes to yellow, because:A. Chromate iron changes to dichromate iron.B. dichroamte ion changes to chromate ion.C. oxidation number of chromium changes from `+6` to `+4`D. oxidation number of chromium changes from `+4` to `+6`
Answer» Correct Answer - B

Discussion

33.	Identify the weakest base amongst the followingA. p-methoxyanilineB. o-tuluidineC. benzene-1,4-diamineD. 4-aminobenzoic acid
Answer» Correct Answer - D

Discussion

34.	Identify the strongest acid amongst the followingA. chlroacetic acidB. Acetic acidC. Trichloroacetic acidD. Dichloroacetic acid
Answer» Correct Answer - C

Discussion

35.	Colligative property depends only on - in a solution.A. Number of solute particlesB. Number of solvent particles.C. Nature of solute particles.D. Nature of solvent particles.
Answer» Correct Answer - A

Discussion

36.	Identify the weakest acidic compound amongst the followingA. p-nitrophenolB. p-chlorophenolC. p-cresolD. p-aminophenol
Answer» Correct Answer - D

Discussion

37.	Amonst the followings, identify a copolymer?A. OrlonB. PVCC. PHBVD. Teflon
Answer» Correct Answer - C

Discussion

38.	Which of the following amines yields foul smelling product with holoform and alcoholic KOH?A. Ethyl amineB. Diethyl amineC. Triethyl amineD. Ethyl methyl amine
Answer» Correct Answer - A

Discussion

39.	`CH_(3)-CH_(2)-Br overset("Alco. KOH")underset(Delta) to B overset(HBr) to C overset(Na//"ether") to D` The compound D is:A. ethaneB. propaneC. n-butaneD. n-pentane
Answer» Correct Answer - A::B::C

Discussion

40.	Which of the following NOT present in DNA?A. AdenineB. GuanineC. ThymineD. Uracil
Answer» Correct Answer - D

Discussion

41.	Which of the following paris is an intensive property?A. Density, viscosityB. Surface tension, massC. Viscosity, internal energyD. Heat capacity, volume
Answer» Correct Answer - A::C::D

Discussion

42.	For a reaction, `2N_(2)O_(5)(g) to 4NO_(2)(g) + O_(2)(g)` rate of reaction is:A. `-1/2 (d[N_(2)O_(5)])/(dt)`B. `-1/4 (d[NO_(2)])/(dt)`C. `(d[O_(2)])/(dt)`D. `1/4 (d[NO_(2)])/(dt)`
Answer» Correct Answer - B

Discussion

43.	Which of the following solutions shows maximum depression in freezing point?A. 0.5 M `Li_(2)SO_(4)`B. 1 M NaClC. 0.5 M `Al_(2)(SO_(4))_(3)`D. 0.5 M `BaCl_(2)`
Answer» Correct Answer - C

Discussion

44.	Which of the following compounds contain S=O as well as S=S bonds?A. Sulphuric acidB. Thiosulphuric acidC. sulphurous acidD. Thioulsphurous acid
Answer» Correct Answer - B

Discussion

45.	For a gaseous reaction the unit of rate of reactions isA. L atm `s^(-1)`B. atm `"mol"^(-1) s^(-1)`C. atm `s^(-1)`D. mol s
Answer» Correct option is: (C) \(atm \ s^{-1}\) For gaseous reaction = \(\frac {Change\, in\, concentration}{time}\) Therefore, unit of rate of reaction = \(\frac {atm}{Sec}\) or \(atm\,s^{-1}\) Correct Answer - C

45.

For a gaseous reaction the unit of rate of reactions isA. L atm `s^(-1)`B. atm `"mol"^(-1) s^(-1)`C. atm `s^(-1)`D. mol s

Answer»

Correct option is: (C) \(atm \ s^{-1}\)

For gaseous reaction = \(\frac {Change\, in\, concentration}{time}\)

Therefore, unit of rate of reaction = \(\frac {atm}{Sec}\)

or \(atm\,s^{-1}\)

Correct Answer - C

Discussion

46.	In body centred cubic structure the space occupied is aboutA. `68%`B. `53%`C. `38%`D. `32%`
Answer» Correct Answer - A

Discussion

47.	The determination of molar mass from elevation in boiling point is called as-A. cryoscopyB. colorimetryC. ebulliscopyD. spectroscopy
Answer» Correct Answer - C

Discussion

48.	What is the geometry of chromate ion?A. TetrahedralB. OctahedralC. Trigonal planarD. Linear
Answer» Correct Answer - A

Discussion

49.	If the enthalpy of vaporization of water at `100^(@)` C is 186.5 J. `"mol"^(1)`, the entropy of vaporization will be:-A. 4.0 J. `K^(-1). "mol"^(-1)`B. `3.0 J. K^(-1). "mol"^(-1)`C. `1.5 J. K^(-1).mol^(-1)`D. `0.5 J. K^(-1). Mol^(-1)`
Answer» Correct Answer - D

Discussion

50.	96500 coulombs corresponds to the charge on how many electrons-A. `1.6 xx 10^(19)`B. `6.022 xx 10^(20)`C. `6.022 xx 10^(23)`D. `6.022 xx 10^(24)`
Answer» Correct Answer - C

Discussion

Explore topic-wise InterviewSolutions in .

Which of the following is polymide?A. TeflonB. TeryleneC. Nylon 6,6D. Bakelite

The molar conductivity of cation and anion of salt BA are 180 AND 220 mhos respectively. The molar conductivity of salt BA at infinite dilution is-A. 90 mhos. `cm^(2). Mol^(-1)`B. `110 mhos.cm^(2). Mol^(-1)`C. 200 mhos. `cm^(2). Mol^(-1)`D. 400 mhos. `cm^(2). Mol^(-1)`

3-Methylbutane-2-ol on heating with HI givesA. 2-iodo-3-methylbutaneB. 2-iodo-2-methylbutaneC. 1-iodo-3-methylbuataneD. 1-iodo-2-methylbutane

What is the molecular formula of chromyl chloride?A. `CrO_(2)Cl_(2)`B. `CrOCl_(2)`C. `CrCl_(3)`D. `Cr_(2)O"C"l_(2)`

What is the molecular formula of oleum?A. `H_(2)SO_(3)`B. `H_(2)SO_(4)`C. `H_(2)S_(2)O_(7)`D. `H_(2)S_(2)O_(8)`

The rate of reaction for certain reaction is expressed as :`1/3 (d[A])/(dt) = -1/2(d[B])/(dt) = -(d[C])/(dt)` The reaction is:A. `3A to 2B + C`B. `2B to 3A + C`C. `2B + C to 3A`D. `3A + 2B to C`

Purification of aluminium by electrolytic refining is carried out byA. Hoope processB. Hall processC. Baeyer processD. Serperckprocess

Triclinic crystal has the following the cell parameters:A. `alpha = beta = gamma = 90^(@)` and a=b=cB. `alpha ne beta ne gamma ne 90^(@)` and `a ne b ne c`C. `a = gamma = 90^(@), beta ne 90^(@)` and `a ne b ne c`D. `alpha = beta = gamma = 90^(@)` and `a ne b ne c`

The temperature at which the vapour pressure of a liquid becomes equals to the external (atmospheric) pressure is itsA. melting pointB. boiling pointC. 273 KD. 373 K

p-type semi-conductors are made by mixing silicon with impurities of-A. germaniumB. boronC. arsenicD. antimony

What is the chemical composition of malachite?A. `CuO. CuCO_(3)`B. `Cu(OH)_(2).CuCO_(3)`C. `CuO. Cu(OH)_(2)`D. `Cu_(2)O.Cu(OH)_(2)`

For a chemical reaction, `DeltaS = -0.035 kJ//K` and `DeltaH = -20 kJ`. At what temperature does the reaction turn spontaneous?A. 5.14 KB. 57.14 KC. 571.4 KD. 5714.0 K

On calculating the strength of current in amperes if a charge of 840 C (coulomb) passes through an electrolyte in 7minutes, it will beA. 1B. 2C. 3D. 4

The hybridisation of phosphorus in phosphorus pentachlride isA. `dsp^(3)`B. `sp^(3)d`C. `sp^(3)d^(2)`D. `sp^(3)d^(2)`

The rate constant for a first order reaction is 100 `S^(-1)`. The time required for completion of `50%` of reaction is-A. 0.0693 millisecondsB. 0.693 millisecondsC. 6.93 millisecondsD. 69.3 milliseconds

Number of faradays of electricity required to liberate 12 g of hydrogen isA. 1B. 8C. 12D. 16

The integrated rate equation for first order reaction is A `to` products.A. k=2.303 t `log_(10) ([A]_(0))/([A]_(t))`B. `k=-1/t ln ([A]_(t))/([A]_(0))`C. `k=(2.303)/t log_(10)([A]_(t))/([A]_(0))`D. `k=1/2 ln ([A]_(t))/([A]_(0))`

The element that does NOT exhibit allotropy is-A. AsB. SbC. BiD. N

IUPAC name of `K_(4)[Fe(CN)_(6)]` is-A. tetrapotassium ferrocynaideB. potassium ferricyanideC. potassium ferrocyanideD. potassium hexacyanoferrate

IUPAC name of `C_(6)H_(5) - overset(O)overset(||)C - CH_(2)CH_(2)-CH_(2)-CH_(2)-CH_(3)`A. 1-phenylhexan-2-oneB. 6-phenylhexan-2-oneC. 1-benzylhexan - 2-oneD. Dodecan-5-one

Which among the following molecular formuale represents urotropine?A. `C_(6)H_(12)N_(4)`B. `C_(6)H_(12)N_(4)O_(2)`C. `C_(6)H_(24)H_(4)`D. `C_(6)H_(24)N_(4)O_(2)`

Iodine exists as-A. polar molecular solidB. ionic acidC. nonpolar molecular solidD. hydrogen bonded molecular solid

The molecular formula `H_(2)S_(2)O_(2)` represents which oxoacid among the following?A. Hydrosulphurous acidB. Thiosulphuric acidC. Sulphuric acidD. Pyrosulphurous acid

Which of the following reagents is best for the following conversion? A. `LiAlH_(4)`B. `H_(3)O^(+)`C. `H_(2)//Ni, 453 K`D. Zn-Hg + Conc. HCl

Tertiary butyl amine is a-A. primary amineB. secondary amineC. tertiary amineD. quaternary ammonium salt

Inflammation of tongue is due to the deficiency of __________.A. Vitamin `B_(1)`B. Vitamin `B_(2)`C. Vitamin `B_(5)`D. Vitamin `B_(6)`

The Zieglar-Natta catalyst is used in the preparation ofA. LDPEB. PHBVC. PAND. HDPE

Stachyose is an example ofA. monosaccharidesB. disaccharidesC. trisaccharidesD. tetrasaccharide

`Fe_(2)O_(3)` is reduced to spongy iron near near the top of blast furnace byA. `H_(2)`B. CaOC. `SiO_(2)`D. CO

Which of the following amines gives yellow oily liquid with nitrous acid?A. Ethyl amineB. Methyl amineC. Diethyl amineD. Triethyl amine

Identify the weakest base amongst the followingA. p-methoxyanilineB. o-tuluidineC. benzene-1,4-diamineD. 4-aminobenzoic acid

Identify the strongest acid amongst the followingA. chlroacetic acidB. Acetic acidC. Trichloroacetic acidD. Dichloroacetic acid

Colligative property depends only on - in a solution.A. Number of solute particlesB. Number of solvent particles.C. Nature of solute particles.D. Nature of solvent particles.

Identify the weakest acidic compound amongst the followingA. p-nitrophenolB. p-chlorophenolC. p-cresolD. p-aminophenol

Amonst the followings, identify a copolymer?A. OrlonB. PVCC. PHBVD. Teflon

Which of the following amines yields foul smelling product with holoform and alcoholic KOH?A. Ethyl amineB. Diethyl amineC. Triethyl amineD. Ethyl methyl amine

`CH_(3)-CH_(2)-Br overset("Alco. KOH")underset(Delta) to B overset(HBr) to C overset(Na//"ether") to D` The compound D is:A. ethaneB. propaneC. n-butaneD. n-pentane

Which of the following NOT present in DNA?A. AdenineB. GuanineC. ThymineD. Uracil

Which of the following paris is an intensive property?A. Density, viscosityB. Surface tension, massC. Viscosity, internal energyD. Heat capacity, volume

For a reaction, `2N_(2)O_(5)(g) to 4NO_(2)(g) + O_(2)(g)` rate of reaction is:A. `-1/2 (d[N_(2)O_(5)])/(dt)`B. `-1/4 (d[NO_(2)])/(dt)`C. `(d[O_(2)])/(dt)`D. `1/4 (d[NO_(2)])/(dt)`

Which of the following solutions shows maximum depression in freezing point?A. 0.5 M `Li_(2)SO_(4)`B. 1 M NaClC. 0.5 M `Al_(2)(SO_(4))_(3)`D. 0.5 M `BaCl_(2)`

Which of the following compounds contain S=O as well as S=S bonds?A. Sulphuric acidB. Thiosulphuric acidC. sulphurous acidD. Thioulsphurous acid

For a gaseous reaction the unit of rate of reactions isA. L atm `s^(-1)`B. atm `"mol"^(-1) s^(-1)`C. atm `s^(-1)`D. mol s

In body centred cubic structure the space occupied is aboutA. `68%`B. `53%`C. `38%`D. `32%`

The determination of molar mass from elevation in boiling point is called as-A. cryoscopyB. colorimetryC. ebulliscopyD. spectroscopy

What is the geometry of chromate ion?A. TetrahedralB. OctahedralC. Trigonal planarD. Linear

If the enthalpy of vaporization of water at `100^(@)` C is 186.5 J. `"mol"^(1)`, the entropy of vaporization will be:-A. 4.0 J. `K^(-1). "mol"^(-1)`B. `3.0 J. K^(-1). "mol"^(-1)`C. `1.5 J. K^(-1).mol^(-1)`D. `0.5 J. K^(-1). Mol^(-1)`

96500 coulombs corresponds to the charge on how many electrons-A. `1.6 xx 10^(19)`B. `6.022 xx 10^(20)`C. `6.022 xx 10^(23)`D. `6.022 xx 10^(24)`