46295 + Interview Questions in Chemistry

1.	what does solubility of halides of s block elements depend upon?
Answer» what does solubility of halides of s block elements depend upon?

Discussion

2.	26. An element (x) exist in two isotopic forms x80 and x82. If the percentage abundance of the lighter isotope is 40% then the average atomic mass of x is?
Answer» 26. An element (x) exist in two isotopic forms x80 and x82. If the percentage abundance of the lighter isotope is 40% then the average atomic mass of x is?

Discussion

3.	Calculate the number of photons emitted by 100 W yellow lamp in 1 s. If the wavelength of yellow light is 560 nm and assuming 100% efficiency.
Answer» Calculate the number of photons emitted by $100 W$ yellow lamp in $1 s$ . If the wavelength of yellow light is $560 nm$ and assuming $100 %$ efficiency.

Discussion

4.	Which among the following is a three dimensional molecule? (1) CH_2=CH-CH=CH_2 (2) CH_2=CH-CN (3) CH_2=C=CH_2 (4) CH_2=C=C=CH_2
Answer» Which among the following is a three dimensional molecule? (1) CH_2=CH-CH=CH_2 (2) CH_2=CH-CN (3) CH_2=C=CH_2 (4) CH_2=C=C=CH_2

Discussion

5.	If energy of electron in 2nd excited state of hydrogen atom is -xkjmol^-1 then energy of electron in 1st excited state of He+ ion is
Answer» If energy of electron in 2nd excited state of hydrogen atom is -xkjmol^-1 then energy of electron in 1st excited state of He+ ion is

Discussion

6.	In the reaction 4A + 2B + 3C → A4B2C3What will be the number of moles of product formed starting from 1 mol of A, 0.6 mol of B and 0.72 mol of C ?
Answer» In the reaction $4 A + 2 B + 3 C \to A_{4} B_{2} C_{3}$ What will be the number of moles of product formed starting from $1 mol$ of $A$ , $0.6 mol$ of $B$ and $0.72 mol$ of $C$ ?

Discussion

7.	The de-Broglie wavelength associated with an electron accelerated through a potential difference of 64 V is,
Answer» The de-Broglie wavelength associated with an electron accelerated through a potential difference of $64 V$ is,

Discussion

8.	14 A weak acid H3A has the three consecutive dissociation constants K1, K2 and K3 in water as 1.0 104, 1.0 108 and 1.0 1016 respectively at room temperature. A metal M forms salt MA which is sparingly soluble (solubility product 1030 ) in water. It also forms a water soluble chloride MCl3 which dissociates into M3+ and Cl ions completely in aqueous solution. For an aqueous solution of the acid H3A of concentration C ( 1 M) at room temperature, the correct statement(s) is/are: (A) The acid acts as a dibasic acid. (B) The H+ ion concentration in the solution is close to (K1C)1/2 . (C) The H+ ion concentration in the solution is (3K1 K2 K3C)1/4 . (D) On addition of excess of the soluble salt MCl3 to the acid solution, the H+ ion concentration in the solution will be 3C.
Answer» 14 A weak acid H3A has the three consecutive dissociation constants K1, K2 and K3 in water as 1.0 104, 1.0 108 and 1.0 1016 respectively at room temperature. A metal M forms salt MA which is sparingly soluble (solubility product 1030 ) in water. It also forms a water soluble chloride MCl3 which dissociates into M3+ and Cl ions completely in aqueous solution. For an aqueous solution of the acid H3A of concentration C ( 1 M) at room temperature, the correct statement(s) is/are: (A) The acid acts as a dibasic acid. (B) The H+ ion concentration in the solution is close to (K1C)1/2 . (C) The H+ ion concentration in the solution is (3K1 K2 K3C)1/4 . (D) On addition of excess of the soluble salt MCl3 to the acid solution, the H+ ion concentration in the solution will be 3C.

Discussion

9.	What happens when calcium nitrate reacts with ammonium hydroxide?
Answer» What happens when calcium nitrate reacts with ammonium hydroxide?

Discussion

10.	For a multielectron system, which of the following will be the correct sequence of energy of orbitals?
Answer» For a multielectron system, which of the following will be the correct sequence of energy of orbitals?

Discussion

11.	The percentage compositions of ammonia, water and nitrogen dioxide are given below.Ammonia: 82.35% N and 17.65% HWater: 11.11% H and 88.89% ONitrogen dioxide: 30.43% N and 69.57% OProve that the given information explains the law of reciprocal proportions.
Answer» The percentage compositions of ammonia, water and nitrogen dioxide are given below. Ammonia: 82.35% N and 17.65% H Water: 11.11% H and 88.89% O Nitrogen dioxide: 30.43% N and 69.57% O Prove that the given information explains the law of reciprocal proportions.

Discussion

12.	is kohlrausch law only applicable for weak electrolytes?
Answer» is kohlrausch law only applicable for weak electrolytes?

Discussion

13.	stephen reductio
Answer» stephen reductio

Discussion

14.	The functionally of propene and adipic acid are respectively:
Answer» The functionally of propene and adipic acid are respectively:

Discussion

15.	What are the reactions involved for ozone layer depletion in the stratosphere?
Answer» What are the reactions involved for ozone layer depletion in the stratosphere?

Discussion

16.	If the radius of Mg2+ ion, Cs+ ion, O2- ion, S2- ion and Cl- ion are 0.65 Å , 1.69 Å, 1.40 Å, 1.84 Å, and 1.81 Å respectively. Then the co-ordination numbers of the cations in the crystals of MgS, MgO and CsCl respectively are:
Answer» If the radius of Mg2+ ion, Cs+ ion, O2- ion, S2- ion and Cl- ion are 0.65 Å , 1.69 Å, 1.40 Å, 1.84 Å, and 1.81 Å respectively. Then the co-ordination numbers of the cations in the crystals of MgS, MgO and CsCl respectively are:

Discussion

17.	Which of the following is not the correct route to prepare compound 'X'?
Answer» Which of the following is not the correct route to prepare compound 'X'?

Discussion

18.	23. AB crystallizes in a body centered cubic lattice with edge length 'a' equal to 387 pm. The distance between two oppositively charged ions in the lattice is A) 300 pm B) 335 pm C) 250 pm D) 200 pm
Answer» 23. AB crystallizes in a body centered cubic lattice with edge length 'a' equal to 387 pm. The distance between two oppositively charged ions in the lattice is A) 300 pm B) 335 pm C) 250 pm D) 200 pm

Discussion

19.	A cistern is filled by one tap in 12 minutes and emptied by another in 10 minutes. If the second pipe is opened 3 minutes after the first, at what time more will the cistern be emptied?
Answer» A cistern is filled by one tap in 12 minutes and emptied by another in 10 minutes. If the second pipe is opened 3 minutes after the first, at what time more will the cistern be emptied?

Discussion

20.	In the process of extraction of gold, the following reaction takes places: Roasted gold ore +CN−+ O2 + 2H2O→[X]+OH−[X] +Zn→[Y]+AuIdentify the compounds [X] and [Y].
Answer» In the process of extraction of gold, the following reaction takes places: $Roasted gold ore + C N^{-} + O_{2} + 2 H_{2} O \to [X] + O H^{-}$ $[X] + Z n \to [Y] + A u$ Identify the compounds [X] and [Y].

Discussion

21.	‘l′ and ‘m’ are respectively azimuthal and magnetic quantum numbers. Column-I Column-II (a)Number of values of ′l′ for an energy level(p)0, 1, 2.....(n−1)(b)Actual values of ′l′ for a particular type of(q)+‘l′ to −‘l′ through zeroorbital(c)Number of values of 'm' for ′l′ =2(r)5(d)Actual values of 'm' for a particular type of(s)norbital
Answer» $‘ l^{'}$ and ‘m’ are respectively azimuthal and magnetic quantum numbers. $\begin{matrix} Column-I & Column-II (a) & Number of values of^{'} l^{'} for an energy level & (p) & 0, 1, 2..... (n - 1) (b) & Actual values of^{'} l^{'} for a particular type of & (q) & + ‘ l^{'} to - ‘ l^{'} through zero orbital (c) & Number of values of 'm' for^{'} l^{'} = 2 & (r) & 5 (d) & Actual values of 'm' for a particular type of & (s) & n orbital \end{matrix}$

Discussion

22.	Molarity is expressed as
Answer» Molarity is expressed as

Discussion

23.	42. Is Kp independent of initial moles of reactant
Answer» 42. Is Kp independent of initial moles of reactant

Discussion

24.	The waveform used in a coherent BFSK modulation scheme are as followss0(t)=cos(2πf1t) 0≤t≤Tbs1(t)=cos(2πf2t) 0≤t≤TbThe scheme uses s0(t) to transmit logic '0' and s1(t) to transmit logic 1. The bit rate of the system is Rb=50 kbps. If it has to be ensured that the consecutive bits have a phase continuation and they are also orthogonal, then the minimum value of \|f2−f1\| is equal to _________ kHz.25
Answer» The waveform used in a coherent BFSK modulation scheme are as follows $s_{0} (t) = cos (2 π f_{1} t) 0 \leq t \leq T_{b} s_{1} (t) = cos (2 π f_{2} t) 0 \leq t \leq T_{b}$ The scheme uses $s_{0} (t)$ to transmit logic '0' and $s_{1} (t)$ to transmit logic 1. The bit rate of the system is $R_{b} = 50 k b p s .$ If it has to be ensured that the consecutive bits have a phase continuation and they are also orthogonal, then the minimum value of $\| f_{2} - f_{1} \|$ is equal to _________ kHz. 25

Discussion

25.	which of the following will be the strongest bond [a] F-O [b] O-Cl [c] N-H [d] O-H
Answer» which of the following will be the strongest bond [a] F-O [b] O-Cl [c] N-H [d] O-H

Discussion

26.	Q4) A compund is formed by two elements M&N the elements N forms CCP and atons of M occupy 1/3rd of the voids what is the formula of the compound ?
Answer» Q4) A compund is formed by two elements M&N the elements N forms CCP and atons of M occupy 1/3rd of the voids what is the formula of the compound ?

Discussion

27.	Explain with the help of suitable example polar covalent bond.
Answer» Explain with the help of suitable example polar covalent bond.

Discussion

28.	Q2- Ethylene glycol ,on oxidation with periodic acid gives ?
Answer» Q2- Ethylene glycol ,on oxidation with periodic acid gives ?

Discussion

29.	one gram of metal hydroxide gives x gram of metal oxide. then equivalent weight of metal i
Answer» one gram of metal hydroxide gives x gram of metal oxide. then equivalent weight of metal i

Discussion

30.	When one mole of monoatomic ideal gas at temperature T undergoes adiabatic change reversibly, change in volume is from 1 L to 5L, the final temperature in Kelvin would be:
Answer» When one mole of monoatomic ideal gas at temperature $T$ undergoes adiabatic change reversibly, change in volume is from $1 L t o 5 L$ , the final temperature in Kelvin would be:

Discussion

31.	If radioactivity is a nuclear phenomenon then from where does the electron comes in beta decay?
Answer» If radioactivity is a nuclear phenomenon then from where does the electron comes in beta decay?

Discussion

32.	A current of 5 A is passing through a metallic wire of cross sectional area 14×10−6 m2. If the density of the charge carries in the wire is 5×1026 m3, the drift speed of the electrons is-
Answer» A current of $5 A$ is passing through a metallic wire of cross sectional area $14 \times 10^{- 6} m^{2}$ . If the density of the charge carries in the wire is $5 \times 10^{26} m^{3}$ , the drift speed of the electrons is-

Discussion

33.	In a container equilibrium N2O4(g)⇌2NO2(g) is attained at 25oC. The total equilibrium pressure in container is 380 torr. If equilibrium constant of above equilibrium is 0.667 atm, then degree of dissociation of N2O4 at this temperature will be:
Answer» In a container equilibrium $N_{2} O_{4} (g) ⇌ 2 N O_{2} (g)$ is attained at $25^{o} C .$ The total equilibrium pressure in container is 380 torr. If equilibrium constant of above equilibrium is 0.667 atm, then degree of dissociation of $N_{2} O_{4}$ at this temperature will be:

Discussion

34.	Are (Co(h2o)6)3+ and (Co(nh3)6)3+ outer or inner orbital complexes? Explain with vbt
Answer» Are (Co(h2o)6)3+ and (Co(nh3)6)3+ outer or inner orbital complexes? Explain with vbt

Discussion

35.	Which of the following can undergoes nucleophilic substitution by its neighbouring group participation?
Answer» Which of the following can undergoes nucleophilic substitution by its neighbouring group participation?

Discussion

36.	Which of the following compound acts as an extraordinary oxidising agent?
Answer» Which of the following compound acts as an extraordinary oxidising agent?

Discussion

37.	Ethanol and acetaldehyde can be separated by
Answer» Ethanol and acetaldehyde can be separated by

Discussion

38.	In which of the following groups of periodic table melting point or boiling point increase down the group?
Answer» In which of the following groups of periodic table melting point or boiling point increase down the group?

Discussion

39.	The coefficient of apparent expansion of mercury in a glass vessel is 153×10−6/o C and in a steel vessel is 144×10−6/o C. If a for steel is 12×10−6/o C, then that of glass is
Answer» The coefficient of apparent expansion of mercury in a glass vessel is $153 \times 10^{-} 6 /^{o} C$ and in a steel vessel is $144 \times 10^{- 6} /^{o} C$ . If a for steel is $12 \times 10^{- 6} /^{o} C$ , then that of glass is

Discussion

40.	What is the effect on vapour pressure of solution when external pressure is increased??
Answer» What is the effect on vapour pressure of solution when external pressure is increased??

Discussion

41.	1 gram-atom of nitrogen represents A)6.022 × 10^23 moleculesB)22.4 L N2 at STPC)11.2 L N2 at STPD) 28g of Nitrogen
Answer» 1 gram-atom of nitrogen represents A)6.022 × 10^23 molecules B)22.4 L N2 at STP C)11.2 L N2 at STP D) 28g of Nitrogen

Discussion

42.	The number of geometrical isomers possible for the compound CH3−CH=CH−CH=CH−CH3 is:
Answer» The number of geometrical isomers possible for the compound $C H_{3} - C H = C H - C H = C H - C H_{3}$ is:

Discussion

43.	An electron in an atom undergoes transition in such a way that its kinetic energy changes from x to x4, the change in potential energy will be
Answer» An electron in an atom undergoes transition in such a way that its kinetic energy changes from x to $\frac{x}{4}$ , the change in potential energy will be

Discussion

44.	Resistivity is equal to product of resistance and area upon length. By this formula we can say that Resistivity is dependent on length and area but it is not true and Resistivity is dependent on nature of material . Why? Explain.
Answer» Resistivity is equal to product of resistance and area upon length. By this formula we can say that Resistivity is dependent on length and area but it is not true and Resistivity is dependent on nature of material . Why? Explain.

Discussion

45.	6.The amount of work done in pumping water out of a cubical vessel of height 1m is nearly a) 5000 J. b) 10000 J. c) 5 J. d) 10 J
Answer» 6.The amount of work done in pumping water out of a cubical vessel of height 1m is nearly a) 5000 J. b) 10000 J. c) 5 J. d) 10 J

Discussion

46.	Lead Acetate when reacts with `A', gives black ppt
Answer» Lead Acetate when reacts with `A', gives black ppt

Discussion

47.	The number of C-C sigma bonds in the compound
Answer» The number of C-C sigma bonds in the compound

47.

The number of C-C sigma bonds in the compound

Answer»

The number of C-C sigma bonds in the compound

Discussion

48.	The total no of nodes in σ2pz and π2px orbitals isa) 0 and 1b)1 and 1c)1 and 2d)2 and 1
Answer» The total no of nodes in σ2pz and π2px orbitals is a) 0 and 1 b)1 and 1 c)1 and 2 d)2 and 1

Discussion

49.	what is the central atom hybridisation for co
Answer» what is the central atom hybridisation for co

Discussion

50.	Which of the following alkanes can be prepared in good yield by Wurtz reaction?
Answer» Which of the following alkanes can be prepared in good yield by Wurtz reaction?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

what does solubility of halides of s block elements depend upon?

26. An element (x) exist in two isotopic forms x80 and x82. If the percentage abundance of the lighter isotope is 40% then the average atomic mass of x is?

Calculate the number of photons emitted by 100 W yellow lamp in 1 s. If the wavelength of yellow light is 560 nm and assuming 100% efficiency.

Which among the following is a three dimensional molecule? (1) CH_2=CH-CH=CH_2 (2) CH_2=CH-CN (3) CH_2=C=CH_2 (4) CH_2=C=C=CH_2

If energy of electron in 2nd excited state of hydrogen atom is -xkjmol^-1 then energy of electron in 1st excited state of He+ ion is

In the reaction 4A + 2B + 3C → A4B2C3What will be the number of moles of product formed starting from 1 mol of A, 0.6 mol of B and 0.72 mol of C ?

The de-Broglie wavelength associated with an electron accelerated through a potential difference of 64 V is,

What happens when calcium nitrate reacts with ammonium hydroxide?

For a multielectron system, which of the following will be the correct sequence of energy of orbitals?

The percentage compositions of ammonia, water and nitrogen dioxide are given below.Ammonia: 82.35% N and 17.65% HWater: 11.11% H and 88.89% ONitrogen dioxide: 30.43% N and 69.57% OProve that the given information explains the law of reciprocal proportions.

is kohlrausch law only applicable for weak electrolytes?

stephen reductio

The functionally of propene and adipic acid are respectively:

What are the reactions involved for ozone layer depletion in the stratosphere?

If the radius of Mg2+ ion, Cs+ ion, O2- ion, S2- ion and Cl- ion are 0.65 Å , 1.69 Å, 1.40 Å, 1.84 Å, and 1.81 Å respectively. Then the co-ordination numbers of the cations in the crystals of MgS, MgO and CsCl respectively are:

Which of the following is not the correct route to prepare compound 'X'?

23. AB crystallizes in a body centered cubic lattice with edge length 'a' equal to 387 pm. The distance between two oppositively charged ions in the lattice is A) 300 pm B) 335 pm C) 250 pm D) 200 pm

A cistern is filled by one tap in 12 minutes and emptied by another in 10 minutes. If the second pipe is opened 3 minutes after the first, at what time more will the cistern be emptied?

In the process of extraction of gold, the following reaction takes places: Roasted gold ore +CN−+ O2 + 2H2O→[X]+OH−[X] +Zn→[Y]+AuIdentify the compounds [X] and [Y].

Molarity is expressed as

42. Is Kp independent of initial moles of reactant

which of the following will be the strongest bond [a] F-O [b] O-Cl [c] N-H [d] O-H

Q4) A compund is formed by two elements M&amp;N the elements N forms CCP and atons of M occupy 1/3rd of the voids what is the formula of the compound ?

Explain with the help of suitable example polar covalent bond.

Q2- Ethylene glycol ,on oxidation with periodic acid gives ?

one gram of metal hydroxide gives x gram of metal oxide. then equivalent weight of metal i

When one mole of monoatomic ideal gas at temperature T undergoes adiabatic change reversibly, change in volume is from 1 L to 5L, the final temperature in Kelvin would be:

If radioactivity is a nuclear phenomenon then from where does the electron comes in beta decay?

A current of 5 A is passing through a metallic wire of cross sectional area 14×10−6 m2. If the density of the charge carries in the wire is 5×1026 m3, the drift speed of the electrons is-

In a container equilibrium N2O4(g)⇌2NO2(g) is attained at 25oC. The total equilibrium pressure in container is 380 torr. If equilibrium constant of above equilibrium is 0.667 atm, then degree of dissociation of N2O4 at this temperature will be:

Are (Co(h2o)6)3+ and (Co(nh3)6)3+ outer or inner orbital complexes? Explain with vbt

Which of the following can undergoes nucleophilic substitution by its neighbouring group participation?

Which of the following compound acts as an extraordinary oxidising agent?

Ethanol and acetaldehyde can be separated by

In which of the following groups of periodic table melting point or boiling point increase down the group?

The coefficient of apparent expansion of mercury in a glass vessel is 153×10−6/o C and in a steel vessel is 144×10−6/o C. If a for steel is 12×10−6/o C, then that of glass is

What is the effect on vapour pressure of solution when external pressure is increased??

1 gram-atom of nitrogen represents A)6.022 × 10^23 moleculesB)22.4 L N2 at STPC)11.2 L N2 at STPD) 28g of Nitrogen

The number of geometrical isomers possible for the compound CH3−CH=CH−CH=CH−CH3 is:

An electron in an atom undergoes transition in such a way that its kinetic energy changes from x to x4, the change in potential energy will be

Resistivity is equal to product of resistance and area upon length. By this formula we can say that Resistivity is dependent on length and area but it is not true and Resistivity is dependent on nature of material . Why? Explain.

6.The amount of work done in pumping water out of a cubical vessel of height 1m is nearly a) 5000 J. b) 10000 J. c) 5 J. d) 10 J

Lead Acetate when reacts with `A', gives black ppt

The number of C-C sigma bonds in the compound

The total no of nodes in σ*2pz and π*2px orbitals isa) 0 and 1b)1 and 1c)1 and 2d)2 and 1

what is the central atom hybridisation for co

Which of the following alkanes can be prepared in good yield by Wurtz reaction?

Q4) A compund is formed by two elements M&N the elements N forms CCP and atons of M occupy 1/3rd of the voids what is the formula of the compound ?

The total no of nodes in σ2pz and π2px orbitals isa) 0 and 1b)1 and 1c)1 and 2d)2 and 1