46295 + Interview Questions in Chemistry

1.	Which of the following is an isomer of Butane ?
Answer» Which of the following is an isomer of Butane ?

Discussion

2.	Identify P (major).
Answer» Identify P (major).

Discussion

3.	The half life period of a first order reaction is 1 min 40 seconds. Calculate its rate constant.
Answer» The half life period of a first order reaction is 1 min 40 seconds. Calculate its rate constant.

Discussion

4.	An ionic compound AB has a ZnS type of structure, if the radius A+ is 22.5 pm, then the ideal radius of B− so as not to cause any distortion is (in pm):
Answer» An ionic compound AB has a $Z n S$ type of structure, if the radius $A^{+}$ is 22.5 pm, then the ideal radius of $B^{-}$ so as not to cause any distortion is (in pm):

Discussion

5.	Which of the following is the correct device for the detection of thermal radiation
Answer» Which of the following is the correct device for the detection of thermal radiation

Discussion

6.	Do you want to have an idea of how small a nucleus is? Let's try finding the nuclear radius of 12560X. The value of R0 is 1.1×10−15SI units. Ans: __________________ X 10−15m ___
Answer» Do you want to have an idea of how small a nucleus is? Let's try finding the nuclear radius of $_{60}^{125} X .$ The value of $R_{0} i s 1.1 \times 10^{- 15} S I$ units. Ans: __________________ $X 10^{- 15} m$ ___

6.

Do you want to have an idea of how small a nucleus is? Let's try finding the nuclear radius of 12560X. The value of R0 is 1.1×10−15SI units. Ans: ________________ X 10−15m _

Answer»

Do you want to have an idea of how small a nucleus is? Let's try finding the nuclear radius of $_{60}^{125} X .$

The value of $R_{0} i s 1.1 \times 10^{- 15} S I$ units.

Ans: __________________ $X 10^{- 15} m$

___

Discussion

7.	For which of the following reactions, ΔH≠ΔU?
Answer» For which of the following reactions, $Δ H \neq Δ U$ ?

Discussion

8.	Which of the following reaction will give the same hydrocarbon product?
Answer» Which of the following reaction will give the same hydrocarbon product?

Discussion

9.	A chemical reaction A⇌B is said to be at equilibrium when:
Answer» A chemical reaction A⇌B is said to be at equilibrium when:

Discussion

10.	The conductivity of a 0.01N solution is found to be 0.005 ohm–1 cm–1. The equivalent conductivity of the solution will be
Answer» The conductivity of a 0.01N solution is found to be 0.005 $o h m^{- 1} c m^{- 1}$ . The equivalent conductivity of the solution will be

Discussion

11.	Which of the following is largest?
Answer» Which of the following is largest?

11.

Which of the following is largest?

Answer»

Which of the following is largest?

Discussion

12.	The general electronic configuration of halogens is?
Answer» The general electronic configuration of halogens is?

Discussion

13.	In the given circuit, the potential difference across the capacitor is 12 V in steady state. Each resistor have 3Ω resistance. The emf of the ideal battery is
Answer» In the given circuit, the potential difference across the capacitor is 12 V in steady state. Each resistor have $3 Ω$ resistance. The emf of the ideal battery is

Discussion

14.	Which of the following has least solubility?
Answer» Which of the following has least solubility?

14.

Which of the following has least solubility?

Answer»

Which of the following has least solubility?

Discussion

15.	Keeping in view your locality, describe any four strategies of sustainable development.
Answer» Keeping in view your locality, describe any four strategies of sustainable development.

Discussion

16.	Silver crystallizes in fcc lattice. If the edge length of the cell is 4.07×10−8cm and density is 10.5 g cm−3, calculate the atomic mass of silver.
Answer» Silver crystallizes in fcc lattice. If the edge length of the cell is $4.07 \times 10^{- 8} c m$ and density is $10.5 g c m^{- 3}$ , calculate the atomic mass of silver.

Discussion

17.	The conversion below can be carried out by CH3−C−CH2CH2COOCH3→CH3−CH−CH2CH2CH2OH ∥ ∣ O OH
Answer» The conversion below can be carried out by $C H_{3} - C - C H_{2} C H_{2} C O O C H_{3} \to C H_{3} - C H - C H_{2} C H_{2} C H_{2} O H ∥ ∣ O O H$

Discussion

18.	The sum of coordination number and oxidation number of the metal M in the complex [M(en)2(C2O4)]Cl (where en is ethylenediamine) is :-
Answer» The sum of coordination number and oxidation number of the metal $M$ in the complex $[M (e n)_{2} (C_{2} O_{4})] C l$ (where en is ethylenediamine) is :-

Discussion

19.	Which of the following cannot behave as a ligand
Answer» Which of the following cannot behave as a ligand

Discussion

20.	The half life period of a radioactive element is 120 days. After 600 days, one gram of the element will reduced to
Answer» The half life period of a radioactive element is 120 days. After 600 days, one gram of the element will reduced to

Discussion

21.	SN1 reaction is faster in
Answer» $S N^{1}$ reaction is faster in

21.

SN1 reaction is faster in

Answer»

$S N^{1}$ reaction is faster in

Discussion

22.	'C-C' bond length in benzene lies between single and double bond. The reason is
Answer» 'C-C' bond length in benzene lies between single and double bond. The reason is

22.

'C-C' bond length in benzene lies between single and double bond. The reason is

Answer»

'C-C' bond length in benzene lies between single and double bond. The reason is

Discussion

23.	Which of the following has square planar geometry?
Answer» Which of the following has square planar geometry?

Discussion

24.	Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. How many moles of Oxygen gas escape in the time required for half a mole of the hydrogen to escape?
Answer» Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. How many moles of Oxygen gas escape in the time required for half a mole of the hydrogen to escape?

Discussion

25.	The units of rate and rate constant for a certain reaction are same. The order of reaction is:
Answer» The units of rate and rate constant for a certain reaction are same. The order of reaction is:

Discussion

26.	The bob of a simple pendulum of length 1 m has mass 100 g and a speed of 1.4 m/s at the lowest point in its path. Find the tension in the string at this instant.
Answer» The bob of a simple pendulum of length 1 m has mass 100 g and a speed of 1.4 m/s at the lowest point in its path. Find the tension in the string at this instant.

Discussion

27.	The major product formed in the reaction
Answer» The major product formed in the reaction

Discussion

28.	Which of the following electronic transitions in a hydrogen atom is accompanied with the emission of a radiation that has the least wavelength?
Answer» Which of the following electronic transitions in a hydrogen atom is accompanied with the emission of a radiation that has the least wavelength?

Discussion

29.	The vapour pressure will be lowest for
Answer» The vapour pressure will be lowest for

Discussion

30.	A pair of stereoisomers might be classified in various ways. Which of the following statement are true with respect to pairs of stereoisomers? (a) They might be configurational isomers (b) They might be diastereomers (c) They might be constitutional isomers (d) They might be tautomers (e) They might be conformational isomers (f) They might be enantiomers (g) They might be positional isomers
Answer» A pair of stereoisomers might be classified in various ways. Which of the following statement are true with respect to pairs of stereoisomers? (a) They might be configurational isomers (b) They might be diastereomers (c) They might be constitutional isomers (d) They might be tautomers (e) They might be conformational isomers (f) They might be enantiomers (g) They might be positional isomers

Discussion

31.	Which represents the electronic configuration of the most electropositive element?
Answer» Which represents the electronic configuration of the most electropositive element?

Discussion

32.	The value of n in the molecular formula BenAl2Si6O18 is:
Answer» The value of $n$ in the molecular formula $B e_{n} A l_{2} S i_{6} O_{18}$ is:

Discussion

33.	The maximum kinetic energy of the photoelectrons is found to be 6.63×10−19 J, when the metal is irradiated with a radiation of frequency2×1015 Hz The threshold frequency of the metal is about
Answer» The maximum kinetic energy of the photoelectrons is found to be $6.63 \times 10^{- 19} J$ , when the metal is irradiated with a radiation of frequency $2 \times 10^{15} H z$ The threshold frequency of the metal is about

Discussion

34.	The equilibrium constants for the following are: N2+3H2⇌2NH3 K1 N2+O2⇌2NO K2 H2+12O2→H2O K3 The equilibrium constant (K) of the reaction: 2NH3+52O2K⇌2NO+3H2O, will be
Answer» The equilibrium constants for the following are: $N_{2} + 3 H_{2} ⇌ 2 N H_{3} K_{1}$ $N_{2} + O_{2} ⇌ 2 N O K_{2}$ $H_{2} + \frac{1}{2} O_{2} \to H_{2} O K_{3}$ The equilibrium constant (K) of the reaction: $2 N H_{3} + \frac{5}{2} O_{2} K ⇌ 2 N O + 3 H_{2} O,$ will be

Discussion

35.	The linkage between the two monosaccharide units in lactose
Answer» The linkage between the two monosaccharide units in lactose

Discussion

36.	A capillary tube of radius 0.50 mm is dipped vertically in a pot of water. Find the difference between the pressure of the water in the tube 5.0 cm below the surface and the atmospheric pressure. Surface tension of water = 0.075 Nm−1.
Answer» A capillary tube of radius 0.50 mm is dipped vertically in a pot of water. Find the difference between the pressure of the water in the tube 5.0 cm below the surface and the atmospheric pressure. Surface tension of water = 0.075 $N m^{- 1}$ .

Discussion

37.	CuI(s)+e−→Cu(s)+I−(aq); E∘=−0.188 V Cu2+(aq)+I−+e−→CuI(s) E∘=0.868 V; Ksp(CuI)=10−12M2 and 298R ln 10F=0.059 If the equilibrium constant of the disproportionation reaction of Cu+ is Kc i.e. 2Cu+(aq)Kc⇌Cu(s)+Cu2+(aq); then find the value of (0.59×logKc)
Answer» $C u I (s) + e^{-} \to C u_{(s)} + I_{(a q)}^{-}$ ; $E^{\circ} = - 0.188 V$ $C u_{(a q)}^{2 +} + I^{-} + e^{-} \to C u I_{(s)} E^{\circ} = 0.868 V$ ; $K_{s p} (C u I) = 10^{- 12} M^{2}$ and $\frac{298 R l n 10}{F} = 0.059$ If the equilibrium constant of the disproportionation reaction of $C u^{+}$ is $K_{c}$ i.e. $2 C u^{+} (a q)_{c} C u (s) + C u^{2 +} (a q)$ ; then find the value of ( $0.59 \times l o g K_{c}$ )

Discussion

38.	Which of the following are the poisonous gases?
Answer» Which of the following are the poisonous gases?

Discussion

39.	What is meant by the term 'broad spectrum antibiotics'?
Answer» What is meant by the term 'broad spectrum antibiotics'?

Discussion

40.	The following reactions occur in the stratosphere:
Answer» The following reactions occur in the stratosphere:

Discussion

41.	The root mean square velocity of one mole of a monoatomic gas having molar mass M is urms. The relation between the average kinetic energy (E) of the gas and urms is:
Answer» The root mean square velocity of one mole of a monoatomic gas having molar mass $M$ is $u_{rms}$ . The relation between the average kinetic energy $(E)$ of the gas and $u_{rms}$ is:

Discussion

42.	Match the complex ions given in Column I with the hybridisation and number of unpaired electrons given in Column II and assign the correct code. Column~I Column~II (Complex ion) (Hybridisation, number of unpaired electrons)A. [Cr(H2O)6]3+1. dsp2,1B. [Co(CN)4]2−2. sp3d2,5C. [Ni(NH3)6]2+1. d2sp3,3D. [MnF6]4−2. sp3d2,2 Codes ABCD(a)3142(b)4321(c)3241(d)4123
Answer» Match the complex ions given in Column I with the hybridisation and number of unpaired electrons given in Column II and assign the correct code. $\begin{matrix} Column~I & Column~II (C o m p l e x i o n) & (H y b r i d i s a t i o n, n u m b e r o f u n p a i r e d e l e c t r o n s) A . [C r (H_{2} O)_{6}]^{3 +} & 1. d s p^{2}, 1 B . [C o (C N)_{4}]^{2 -} & 2. s p^{3} d^{2}, 5 C . [N i (N H_{3})_{6}]^{2 +} & 1. d^{2} s p^{3}, 3 D . [M n F_{6}]^{4 -} & 2. s p^{3} d^{2}, 2 \end{matrix}$ Codes $\begin{matrix} A & B & C & D (a) & 3 & 1 & 4 & 2 (b) & 4 & 3 & 2 & 1 (c) & 3 & 2 & 4 & 1 (d) & 4 & 1 & 2 & 3 \end{matrix}$

Discussion

43.	Why any particle when heated produce a wide range of wavelengths?
Answer» Why any particle when heated produce a wide range of wavelengths?

Discussion

44.	CsBr crystal has bcc structure. It has an edge length of The shortest interionic distance between is [IIT 1995]
Answer» CsBr crystal has bcc structure. It has an edge length of The shortest interionic distance between is [IIT 1995]

44.

CsBr crystal has bcc structure. It has an edge length of The shortest interionic distance between is [IIT 1995]

Answer»

CsBr crystal has bcc structure. It has an edge length of The shortest interionic distance between is

[IIT 1995]

Discussion

45.	Find the equivalent weight of KMnO4 in the given reaction, if the molar mass of MnO−4 ion is 'M' ? MnO−4→Mn4+ (neutral medium)
Answer» Find the equivalent weight of $K M n O_{4}$ in the given reaction, if the molar mass of $M n O_{4}^{-}$ ion is 'M' ? $M n O_{4}^{-} \to M n^{4 +}$ (neutral medium)

Discussion

46.	Specify the oxidation numbers of the metals in the following coordination entities: (i) [Co(H2O)(CN)(en)2]2+ (ii) K3[Fe(CN)6] (iii) [CoBr2(en)2]+ (iv) [Cr(NH3)3Cl3] (v) [PtCl4]2−
Answer» Specify the oxidation numbers of the metals in the following coordination entities: (i) ${[C o (H_{2} O) (C N) (e n)_{2}]}_{2}^{2 +}$ (ii) $K_{3} [F e {(C N)}_{6}]$ (iii) ${[C o B r_{2} {(e n)}_{2}]}_{2}^{+}$ (iv) $[C r {(N H_{3})}_{3} C l_{3}]$ (v) ${[P t C l_{4}]}_{4}^{2 -}$

46.

Specify the oxidation numbers of the metals in the following coordination entities: (i) [Co(H2O)(CN)(en)2]2+ (ii) K3[Fe(CN)6] (iii) [CoBr2(en)2]+ (iv) [Cr(NH3)3Cl3] (v) [PtCl4]2−

Answer»

Specify the oxidation numbers of the metals in the following coordination entities:
(i) ${[C o (H_{2} O) (C N) (e n)_{2}]}_{2}^{2 +}$

(ii) $K_{3} [F e {(C N)}_{6}]$

(iii) ${[C o B r_{2} {(e n)}_{2}]}_{2}^{+}$

(iv) $[C r {(N H_{3})}_{3} C l_{3}]$

(v) ${[P t C l_{4}]}_{4}^{2 -}$

Discussion

47.	How many unpaired electrons does the second excited state of halogens (= Cl, Br and I) have?
Answer» How many unpaired electrons does the second excited state of halogens (= Cl, Br and I) have?

Discussion

48.	Given below is a schematic diagram of a portion of DNA. (a) How many strands are shown in the diagram? (b) How many nucleotides have been shown in each strand? (c) Name the parts numbered 1, 2, 3, 4 and 5 respectively. (d) Name the DNA unit constituted by the parts 1, 2 and 3 collectively.
Answer» Given below is a schematic diagram of a portion of DNA. (a) How many strands are shown in the diagram? (b) How many nucleotides have been shown in each strand? (c) Name the parts numbered 1, 2, 3, 4 and 5 respectively. (d) Name the DNA unit constituted by the parts 1, 2 and 3 collectively.

48.

Given below is a schematic diagram of a portion of DNA. (a) How many strands are shown in the diagram? (b) How many nucleotides have been shown in each strand? (c) Name the parts numbered 1, 2, 3, 4 and 5 respectively. (d) Name the DNA unit constituted by the parts 1, 2 and 3 collectively.

Answer»

Given below is a schematic diagram of a portion of DNA.
(a) How many strands are shown in the diagram?
(b) How many nucleotides have been shown in each strand? (c) Name the parts numbered 1, 2, 3, 4 and 5 respectively. (d) Name the DNA unit constituted by the parts 1, 2 and 3 collectively.

Discussion

49.	The sum of p orbitals involved in the hybridisation of NH3 and BF3 molecules are:
Answer» The sum of $p$ orbitals involved in the hybridisation of $N H_{3}$ and $B F_{3}$ molecules are:

Discussion

50.	How many products will be aromatic ion when AgNO3 reacts with the following compounds.
Answer» How many products will be aromatic ion when $A g N O_{3}$ reacts with the following compounds.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following is an isomer of Butane ?

Identify P (major).

The half life period of a first order reaction is 1 min 40 seconds. Calculate its rate constant.

An ionic compound AB has a ZnS type of structure, if the radius A+ is 22.5 pm, then the ideal radius of B− so as not to cause any distortion is (in pm):

Which of the following is the correct device for the detection of thermal radiation

Do you want to have an idea of how small a nucleus is? Let's try finding the nuclear radius of 12560X. The value of R0 is 1.1×10−15SI units. Ans: __________________ X 10−15m ___

For which of the following reactions, ΔH≠ΔU?

Which of the following reaction will give the same hydrocarbon product?

A chemical reaction A⇌B is said to be at equilibrium when:

The conductivity of a 0.01N solution is found to be 0.005 ohm–1 cm–1. The equivalent conductivity of the solution will be

Which of the following is largest?

The general electronic configuration of halogens is?

In the given circuit, the potential difference across the capacitor is 12 V in steady state. Each resistor have 3Ω resistance. The emf of the ideal battery is

Which of the following has least solubility?

Keeping in view your locality, describe any four strategies of sustainable development.

Silver crystallizes in fcc lattice. If the edge length of the cell is 4.07×10−8cm and density is 10.5 g cm−3, calculate the atomic mass of silver.

The conversion below can be carried out by CH3−C−CH2CH2COOCH3→CH3−CH−CH2CH2CH2OH ∥ ∣ O OH

The sum of coordination number and oxidation number of the metal M in the complex [M(en)2(C2O4)]Cl (where en is ethylenediamine) is :-

Which of the following cannot behave as a ligand

The half life period of a radioactive element is 120 days. After 600 days, one gram of the element will reduced to

SN1 reaction is faster in

'C-C' bond length in benzene lies between single and double bond. The reason is

Which of the following has square planar geometry?

Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. How many moles of Oxygen gas escape in the time required for half a mole of the hydrogen to escape?

The units of rate and rate constant for a certain reaction are same. The order of reaction is:

The bob of a simple pendulum of length 1 m has mass 100 g and a speed of 1.4 m/s at the lowest point in its path. Find the tension in the string at this instant.

The major product formed in the reaction

Which of the following electronic transitions in a hydrogen atom is accompanied with the emission of a radiation that has the least wavelength?

The vapour pressure will be lowest for

Which represents the electronic configuration of the most electropositive element?

The value of n in the molecular formula BenAl2Si6O18 is:

The maximum kinetic energy of the photoelectrons is found to be 6.63×10−19 J, when the metal is irradiated with a radiation of frequency2×1015 Hz The threshold frequency of the metal is about

The equilibrium constants for the following are: N2+3H2⇌2NH3 K1 N2+O2⇌2NO K2 H2+12O2→H2O K3 The equilibrium constant (K) of the reaction: 2NH3+52O2K⇌2NO+3H2O, will be

The linkage between the two monosaccharide units in lactose

A capillary tube of radius 0.50 mm is dipped vertically in a pot of water. Find the difference between the pressure of the water in the tube 5.0 cm below the surface and the atmospheric pressure. Surface tension of water = 0.075 Nm−1.

CuI(s)+e−→Cu(s)+I−(aq); E∘=−0.188 V Cu2+(aq)+I−+e−→CuI(s) E∘=0.868 V; Ksp(CuI)=10−12M2 and 298R ln 10F=0.059 If the equilibrium constant of the disproportionation reaction of Cu+ is Kc i.e. 2Cu+(aq)Kc⇌Cu(s)+Cu2+(aq); then find the value of (0.59×logKc)

Which of the following are the poisonous gases?

What is meant by the term 'broad spectrum antibiotics'?

The following reactions occur in the stratosphere:

The root mean square velocity of one mole of a monoatomic gas having molar mass M is urms. The relation between the average kinetic energy (E) of the gas and urms is:

Why any particle when heated produce a wide range of wavelengths?

CsBr crystal has bcc structure. It has an edge length of The shortest interionic distance between is [IIT 1995]

Find the equivalent weight of KMnO4 in the given reaction, if the molar mass of MnO−4 ion is 'M' ? MnO−4→Mn4+ (neutral medium)

Specify the oxidation numbers of the metals in the following coordination entities: (i) [Co(H2O)(CN)(en)2]2+ (ii) K3[Fe(CN)6] (iii) [CoBr2(en)2]+ (iv) [Cr(NH3)3Cl3] (v) [PtCl4]2−

How many unpaired electrons does the second excited state of halogens (= Cl, Br and I) have?

Given below is a schematic diagram of a portion of DNA. (a) How many strands are shown in the diagram? (b) How many nucleotides have been shown in each strand? (c) Name the parts numbered 1, 2, 3, 4 and 5 respectively. (d) Name the DNA unit constituted by the parts 1, 2 and 3 collectively.

The sum of p orbitals involved in the hybridisation of NH3 and BF3 molecules are:

How many products will be aromatic ion when AgNO3 reacts with the following compounds.

Do you want to have an idea of how small a nucleus is? Let's try finding the nuclear radius of 12560X. The value of R0 is 1.1×10−15SI units. Ans: ________________ X 10−15m _