46295 + Interview Questions in Chemistry

1.	A 10 g of a gas at atmospheric pressure is cooled from 273 ∘ C to 0∘ C keeping the volume constant, its pressure would become
Answer» A 10 g of a gas at atmospheric pressure is cooled from $273^{\circ} C t o 0^{\circ} C$ keeping the volume constant, its pressure would become

Discussion

2.	A piece of cork id floating on water in a small tank. The cork oscillates up and down vertically when small ripples pass over the surface of water. The velocity of the ripples being 0.21 ms-1, wave length 15 mm and amplitude 5 mm, the maximum velocity of the piece of cork is
Answer» A piece of cork id floating on water in a small tank. The cork oscillates up and down vertically when small ripples pass over the surface of water. The velocity of the ripples being 0.21 ms^-1, wave length 15 mm and amplitude 5 mm, the maximum velocity of the piece of cork is

2.

A piece of cork id floating on water in a small tank. The cork oscillates up and down vertically when small ripples pass over the surface of water. The velocity of the ripples being 0.21 ms-1, wave length 15 mm and amplitude 5 mm, the maximum velocity of the piece of cork is

Answer»

A piece of cork id floating on water in a small tank. The cork oscillates up and down vertically when small ripples pass over the surface of water. The velocity of the ripples being 0.21 ms^-1, wave length 15 mm and amplitude 5 mm, the maximum velocity of the piece of cork is

Discussion

3.	The enthalpy of the reaction is maximum in which of the following reaction ? 1) NaOH +HBr ------>NaBr+h2o 2)NaOH+HF--------->NaF +h2O
Answer» The enthalpy of the reaction is maximum in which of the following reaction ? 1) NaOH +HBr ------>NaBr+h2o 2)NaOH+HF--------->NaF +h2O

Discussion

4.	At 30∘ C, the solubility of Ag2CO3 (Ksp=8×10−12) would be greatest in 1L of:
Answer» At $30^{\circ} C$ , the solubility of $A g_{2} C O_{3} (K_{s p} = 8 \times 10^{- 12})$ would be greatest in 1L of:

Discussion

5.	In CH3CH2OH, the bond that undergoes heterolytic cleavage most readily is
Answer» In $C H_{3} C H_{2} O H$ , the bond that undergoes heterolytic cleavage most readily is

Discussion

6.	This reaction is known as:
Answer» This reaction is known as:

6.

This reaction is known as:

Answer»

This reaction is known as:

Discussion

7.	The pair of compounds having metals in their highest oxidation state is
Answer» The pair of compounds having metals in their highest oxidation state is

Discussion

8.	With the help of a labeled diagram show that there are four octahedral voids per unit cell in a cubic close-packed structure.
Answer» With the help of a labeled diagram show that there are four octahedral voids per unit cell in a cubic close-packed structure.

Discussion

9.	Question 11 Which of the following reactions increase production of dihydrogen from synthesis gas? (a)CH4(g)+H2O(g)1270 K−−−−→NiCO(g)+3H2(g)(b)C(s)+H2O(g)1270 K−−−−→CO(g)+H2(g)(c)CO(g)+H2O(g)673K−−−−−→CatalystCO2(g)+H2(g)(d)C2H6+2H2O(g)1270 K−−−−→Ni2CO(g)+5H2(g)
Answer» Question 11 Which of the following reactions increase production of dihydrogen from synthesis gas? $(a) C H_{4} (g) + H_{2} O (g) 1270 K - --- \to N i C O (g) + 3 H_{2} (g) (b) C (s) + H_{2} O (g) 1270 K - --- \to C O (g) + H_{2} (g) (c) C O (g) + H_{2} O (g) 673 K - ---- \to C a t a l y s t C O_{2} (g) + H_{2} (g) (d) C_{2} H_{6} + 2 H_{2} O (g) 1270 K - --- \to N i 2 C O (g) + 5 H_{2} (g)$

9.

Question 11 Which of the following reactions increase production of dihydrogen from synthesis gas? (a)CH4(g)+H2O(g)1270 K−−−−→NiCO(g)+3H2(g)(b)C(s)+H2O(g)1270 K−−−−→CO(g)+H2(g)(c)CO(g)+H2O(g)673K−−−−−→CatalystCO2(g)+H2(g)(d)C2H6+2H2O(g)1270 K−−−−→Ni2CO(g)+5H2(g)

Answer»

Question 11

Which of the following reactions increase production of dihydrogen from synthesis gas?

$(a) C H_{4} (g) + H_{2} O (g) 1270 K - --- \to N i C O (g) + 3 H_{2} (g) (b) C (s) + H_{2} O (g) 1270 K - --- \to C O (g) + H_{2} (g) (c) C O (g) + H_{2} O (g) 673 K - ---- \to C a t a l y s t C O_{2} (g) + H_{2} (g) (d) C_{2} H_{6} + 2 H_{2} O (g) 1270 K - --- \to N i 2 C O (g) + 5 H_{2} (g)$

Discussion

10.	The number of atoms in 2.4 g of a body centred cubic crystal with edge length 200 pm is (density=10 gcm−3,NA=6×1023 atoms/mol)
Answer» The number of atoms in 2.4 g of a body centred cubic crystal with edge length 200 pm is ( $d e n s i t y = 10 g c m^{- 3}, N_{A} = 6 \times 10^{23} a t o m s / m o l$ )

Discussion

11.	When a metal of group 1 was dissolved in liquid ammonia, the following observations were obtained (i) Blue solution was obtained initially. (ii) On concentrating the solution, Blue colour changed to bronze colour. How do you account fot hte blue colour of the solution? Give the name of the product formed on keeping the solution for some time.
Answer» When a metal of group 1 was dissolved in liquid ammonia, the following observations were obtained (i) Blue solution was obtained initially. (ii) On concentrating the solution, Blue colour changed to bronze colour. How do you account fot hte blue colour of the solution? Give the name of the product formed on keeping the solution for some time.

11.

When a metal of group 1 was dissolved in liquid ammonia, the following observations were obtained (i) Blue solution was obtained initially. (ii) On concentrating the solution, Blue colour changed to bronze colour. How do you account fot hte blue colour of the solution? Give the name of the product formed on keeping the solution for some time.

Answer»

When a metal of group 1 was dissolved in liquid ammonia, the following observations were obtained

(i) Blue solution was obtained initially.

(ii) On concentrating the solution, Blue colour changed to bronze colour. How do you account fot hte blue colour of the solution? Give the name of the product formed on keeping the solution for some time.

Discussion

12.	Which of the following is multimolecular colloid A.)lyophilic Sol B.)starch C.) gold Sol. D) soap solution
Answer» Which of the following is multimolecular colloid A.)lyophilic Sol B.)starch C.) gold Sol. D) soap solution

12.

Which of the following is multimolecular colloid A.)lyophilic Sol B.)starch C.) gold Sol. D) soap solution

Answer»

Which of the following is multimolecular colloid

A.)lyophilic Sol B.)starch C.) gold Sol. D) soap solution

Discussion

13.	CrO2−4 is a strong oxidizing agent but MnO2−4 is not. Explain why?
Answer» $C r O_{4}^{2 -}$ is a strong oxidizing agent but $M n O_{4}^{2 -}$ is not. Explain why?

Discussion

14.	Arrange in decreasing order of acid strength. HF,HCl,HBr,HI
Answer» Arrange in decreasing order of acid strength. $H F, H C l, H B r, H I$

Discussion

15.	The percentage by mole of NO2 in a mixture of NO2 and NO are having average molecular mass 34 is
Answer» The percentage by mole of NO2 in a mixture of NO2 and NO are having average molecular mass 34 is

Discussion

16.	The positive carbylamines test is given by (i) N, N-dimethyl aniline (ii) 2, 4-dimethyl aniline (iii) N-methyl-O-methyl aniline (iv) p-methyl benzylamine
Answer» The positive carbylamines test is given by (i) N, N-dimethyl aniline (ii) 2, 4-dimethyl aniline (iii) N-methyl-O-methyl aniline (iv) p-methyl benzylamine

16.

The positive carbylamines test is given by (i) N, N-dimethyl aniline (ii) 2, 4-dimethyl aniline (iii) N-methyl-O-methyl aniline (iv) p-methyl benzylamine

Answer»

The positive carbylamines test is given by
(i) N, N-dimethyl aniline (ii) 2, 4-dimethyl aniline

(iii) N-methyl-O-methyl aniline (iv) p-methyl benzylamine

Discussion

17.	A wooden cube (density of wood is d) of side ‘ℓ’ floats in liquid of density ‘s’ with its upper and lower surface horizontal. If the cube is pushed slightly down and released, it performs simple harmonic motion of period ‘T’. then T is equal to
Answer» A wooden cube (density of wood is d) of side ‘ℓ’ floats in liquid of density ‘s’ with its upper and lower surface horizontal. If the cube is pushed slightly down and released, it performs simple harmonic motion of period ‘T’. then T is equal to

Discussion

18.	In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices. (a) Assertion and reason both are correct statements and reason explains the assertion. (b) Both assertion and reason are wrong statements. (c) Assertion is correct statement and reason is wrong statement. (d) Assertion is wrong statement and reason is correct statement. (e) Assertion and reason both are correct statements but reason does not explain assertion. Assertion (A) In presence of enzyme, substrate molecule can be attacked by the reagent effectively. Reason (R) Active sites of enzymes hold the substrate molecule in a suitable position.
Answer» In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices. (a) Assertion and reason both are correct statements and reason explains the assertion. (b) Both assertion and reason are wrong statements. (c) Assertion is correct statement and reason is wrong statement. (d) Assertion is wrong statement and reason is correct statement. (e) Assertion and reason both are correct statements but reason does not explain assertion. Assertion (A) In presence of enzyme, substrate molecule can be attacked by the reagent effectively. Reason (R) Active sites of enzymes hold the substrate molecule in a suitable position.

Discussion

19.	An ideal heat engine exhausting heat at 42∘C is to have 25% efficiency. It must take heat at
Answer» An ideal heat engine exhausting heat at $42^{\circ} C$ is to have 25% efficiency. It must take heat at

Discussion

20.	What is the difference between dsp3 and sp3d hybridization?
Answer» What is the difference between $d s p^{3}$ and $s p^{3} d$ hybridization?

Discussion

21.	What is deprotonation?
Answer» What is deprotonation?

Discussion

22.	What is the role of NaOH in the metallurgy of Aluminium?
Answer» What is the role of NaOH in the metallurgy of Aluminium?

Discussion

23.	What is the difference between oxidation number and oxidation state?
Answer» What is the difference between oxidation number and oxidation state?

Discussion

24.	Limitations of first law of thermodynamics in simple and easy to understand words
Answer» Limitations of first law of thermodynamics in simple and easy to understand words

Discussion

25.	In IUPAC name of the following compound,the prefix bacause of -Br and suffix bacause of C = 0 will be respectively
Answer» In IUPAC name of the following compound,the prefix bacause of -Br and suffix bacause of C = 0 will be respectively

25.

In IUPAC name of the following compound,the prefix bacause of -Br and suffix bacause of C = 0 will be respectively

Answer»

In IUPAC name of the following compound,the prefix bacause of -Br and suffix bacause of C = 0 will be respectively

Discussion

26.	In the synthesis of Ammonia by Haber's Processs. N2(g)+3H2(g)⇌2NH3(g) at 500∘C, the value of Kp was found to be 0.5. Calculate the value of Kc.
Answer» In the synthesis of Ammonia by Haber's Processs. $N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g)$ at $500^{\circ}$ C, the value of $K_{p}$ was found to be 0.5. Calculate the value of $K_{c}$ .

Discussion

27.	Which of the following compounds will show geometrical isomerism?
Answer» Which of the following compounds will show geometrical isomerism?

Discussion

28.	The carbon atom in acylium ion formed in Friedal- crafts acylation is hybridized.
Answer» The carbon atom in acylium ion formed in Friedal- crafts acylation is hybridized.

Discussion

29.	Find out total the number of species in which at least two nonaxial d - orbital are used is bond formation. SO2−2,ClO−2,XeO4+6,XeO3F2,XeOF4,IO2F−2,SOF4,S3O2−6,S2O2−3
Answer» Find out total the number of species in which at least two nonaxial d - orbital are used is bond formation. $S O_{2}^{2 -}, C l O_{2}^{-}, X e O_{6}^{4 +}, X e O_{3} F_{2}, X e O F_{4}, I O_{2} F_{2}^{-}, S O F_{4}, S_{3} O_{6}^{2 -}, S_{2} O_{3}^{2 -}$

Discussion

30.	Which of the following compounds will form significant amount of meta product during mono-nitration reaction?
Answer» Which of the following compounds will form significant amount of meta product during mono-nitration reaction?

Discussion

31.	Which of the following molecules has the largest bond angle?
Answer» Which of the following molecules has the largest bond angle?

Discussion

32.	How to balance the equation by redox reaction by ion -electron method in basic medium
Answer» How to balance the equation by redox reaction by ion -electron method in basic medium

Discussion

33.	Give the dehydration product(s) of:
Answer» Give the dehydration product(s) of:

Discussion

34.	Calculate the mole fraction of ethanol and water in a sample of rectified spirit which contains 46% ethanol by mass
Answer» Calculate the mole fraction of ethanol and water in a sample of rectified spirit which contains 46% ethanol by mass

Discussion

35.	Define one kilo-calorie of heat.
Answer» Define one kilo-calorie of heat.

Discussion

36.	The ratio of the radii of the first three bohr orbits for hydrogen atom is:
Answer» The ratio of the radii of the first three bohr orbits for hydrogen atom is:

Discussion

37.	The work done in an open vessel at 300K, when 112 g iron reacts with dilute HCl is
Answer» The work done in an open vessel at 300K, when 112 g iron reacts with dilute HCl is

Discussion

38.	Using IUPAC norms write the systematic names of the following: (i) [Co(NH3)6]Cl3 (ii) [Pt(NH3)2Cl(NH2CH3)]Cl (iii) [Ti(H2O)6]3+ (iv) [Mn(H2O)6]2+ (v) [NiCl4]2− (vi) [Ni(NH3)6]Cl2 (vii) [Co(en)3]3+ (viii) [Ni(CO)4]
Answer» Using IUPAC norms write the systematic names of the following: (i) $[C o {(N H_{3})}_{6}] C l_{3}$ (ii) $[P t {(N H_{3})}_{2} C l (N H_{2} C H_{3})] C l$ (iii) ${[T i {(H_{2} O)}_{6}]}_{6}^{3 +}$ (iv) ${[M n {(H_{2} O)}_{6}]}_{6}^{2 +}$ (v) ${[N i C l_{4}]}_{4}^{2 -}$ (vi) $[N i {(N H_{3})}_{6}] C l_{2}$ (vii) ${[C o {(e n)}_{3}]}_{3}^{3 +}$ (viii) $[N i {(C O)}_{4}]$

38.

Using IUPAC norms write the systematic names of the following: (i) [Co(NH3)6]Cl3 (ii) [Pt(NH3)2Cl(NH2CH3)]Cl (iii) [Ti(H2O)6]3+ (iv) [Mn(H2O)6]2+ (v) [NiCl4]2− (vi) [Ni(NH3)6]Cl2 (vii) [Co(en)3]3+ (viii) [Ni(CO)4]

Answer»

Using IUPAC norms write the systematic names of the following:
(i) $[C o {(N H_{3})}_{6}] C l_{3}$

(ii) $[P t {(N H_{3})}_{2} C l (N H_{2} C H_{3})] C l$

(iii) ${[T i {(H_{2} O)}_{6}]}_{6}^{3 +}$

(iv) ${[M n {(H_{2} O)}_{6}]}_{6}^{2 +}$

(v) ${[N i C l_{4}]}_{4}^{2 -}$

(vi) $[N i {(N H_{3})}_{6}] C l_{2}$

(vii) ${[C o {(e n)}_{3}]}_{3}^{3 +}$

(viii) $[N i {(C O)}_{4}]$

Discussion

39.	x moles of sulfur get disproportionated in a basic medium and form Na2S2O3 and Na2S as: S+NaOH→Na2S2O3+Na2S Sodium thiosulfate reacts with iodine in a basic medium to form NaI and Na2SO4 by the reaction: Na2S2O3+I2+NaOH→NaI+Na2SO4+H2O If NaI is completely precipitated by 2.8 N 100 ml AgNO3 solution then what is the value of x?
Answer» x moles of sulfur get disproportionated in a basic medium and form $N a_{2} S_{2} O_{3}$ and $N a_{2} S$ as: $S + N a O H \to N a_{2} S_{2} O_{3} + N a_{2} S$ Sodium thiosulfate reacts with iodine in a basic medium to form $N a I$ and $N a_{2} S O_{4}$ by the reaction: $N a_{2} S_{2} O_{3} + I_{2} + N a O H \to N a I + N a_{2} S O_{4} + H_{2} O$ If $N a I$ is completely precipitated by 2.8 N 100 ml $A g N O_{3}$ solution then what is the value of x?

Discussion

40.	In how many reaction(s), gemdihalide is obtained as a major product?
Answer» In how many reaction(s), gemdihalide is obtained as a major product?

Discussion

41.	As I learnt for 'l' values 0,1,2,3 we have the orbitals as s,p,d and f respectively. So if the value of l is greater than 3 then?
Answer» As I learnt for 'l' values 0,1,2,3 we have the orbitals as s,p,d and f respectively. So if the value of l is greater than 3 then?

Discussion

42.	Iodine is soluble in water in the presence of
Answer» Iodine is soluble in water in the presence of

Discussion

43.	X+2H2OElectrolysis−−−−−−−→C2H4Cl2−−→Y Then X and Y are
Answer» $X + 2 H_{2} O E l e c t r o l y s i s - ------ \to C_{2} H_{4} C l_{2} - - \to Y$ Then X and Y are

Discussion

44.	Which is the smallest atom? a. S b. Si c. P d. He
Answer» Which is the smallest atom? a. S b. Si c. P d. He

Discussion

45.	What happens when S reacts with hot and conc. H2SO4?
Answer» What happens when S reacts with hot and conc. H₂SO₄?

Discussion

46.	The number of primary, secondary and tertiary amines possible with the molecular fomula C3H9N is:
Answer» The number of primary, secondary and tertiary amines possible with the molecular fomula $C_{3} H_{9} N$ is:

Discussion

47.	The reagent that is used up first in a chemical reaction is called:
Answer» The reagent that is used up first in a chemical reaction is called:

Discussion

48.	The enthalpy change for the combustion of ethanol at 298 K and 1 atm is given below CH3-CH2OH(l) + 3O2(g)------------à 2CO2 (g)+ 3H2O(l) ∆H=-1363Kj.Calculate the internal energy change for the above reaction?
Answer» The enthalpy change for the combustion of ethanol at 298 K and 1 atm is given below CH₃-CH₂OH(l) + 3O₂(g)------------à 2CO₂ (g)+ 3H₂O(l) ∆H=-1363Kj.Calculate the internal energy change for the above reaction?

48.

The enthalpy change for the combustion of ethanol at 298 K and 1 atm is given below CH3-CH2OH(l) + 3O2(g)------------à 2CO2 (g)+ 3H2O(l) ∆H=-1363Kj.Calculate the internal energy change for the above reaction?

Answer»

The enthalpy change for the combustion of ethanol at 298 K and 1 atm is given below

CH₃-CH₂OH(l) + 3O₂(g)------------à 2CO₂ (g)+ 3H₂O(l) ∆H=-1363Kj.Calculate the internal energy change for the above reaction?

Discussion

49.	What is Ostwald's process? With reactions please!
Answer» What is Ostwald's process? With reactions please!

Discussion

50.	Which hydrogen like species will have the same radius as that of Bohr's first orbit of hydrogen atom?
Answer» Which hydrogen like species will have the same radius as that of Bohr's first orbit of hydrogen atom?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A 10 g of a gas at atmospheric pressure is cooled from 273 ∘ C to 0∘ C keeping the volume constant, its pressure would become

A piece of cork id floating on water in a small tank. The cork oscillates up and down vertically when small ripples pass over the surface of water. The velocity of the ripples being 0.21 ms-1, wave length 15 mm and amplitude 5 mm, the maximum velocity of the piece of cork is

The enthalpy of the reaction is maximum in which of the following reaction ? 1) NaOH +HBr ------>NaBr+h2o 2)NaOH+HF--------->NaF +h2O

At 30∘ C, the solubility of Ag2CO3 (Ksp=8×10−12) would be greatest in 1L of:

In CH3CH2OH, the bond that undergoes heterolytic cleavage most readily is

This reaction is known as:

The pair of compounds having metals in their highest oxidation state is

With the help of a labeled diagram show that there are four octahedral voids per unit cell in a cubic close-packed structure.

The number of atoms in 2.4 g of a body centred cubic crystal with edge length 200 pm is (density=10 gcm−3,NA=6×1023 atoms/mol)

Which of the following is multimolecular colloid A.)lyophilic Sol B.)starch C.) gold Sol. D) soap solution

CrO2−4 is a strong oxidizing agent but MnO2−4 is not. Explain why?

Arrange in decreasing order of acid strength. HF,HCl,HBr,HI

The percentage by mole of NO2 in a mixture of NO2 and NO are having average molecular mass 34 is

The positive carbylamines test is given by (i) N, N-dimethyl aniline (ii) 2, 4-dimethyl aniline (iii) N-methyl-O-methyl aniline (iv) p-methyl benzylamine

A wooden cube (density of wood is d) of side ‘ℓ’ floats in liquid of density ‘s’ with its upper and lower surface horizontal. If the cube is pushed slightly down and released, it performs simple harmonic motion of period ‘T’. then T is equal to

An ideal heat engine exhausting heat at 42∘C is to have 25% efficiency. It must take heat at

What is the difference between dsp3 and sp3d hybridization?

What is deprotonation?

What is the role of NaOH in the metallurgy of Aluminium?

What is the difference between oxidation number and oxidation state?

Limitations of first law of thermodynamics in simple and easy to understand words

In IUPAC name of the following compound,the prefix bacause of -Br and suffix bacause of C = 0 will be respectively

In the synthesis of Ammonia by Haber's Processs. N2(g)+3H2(g)⇌2NH3(g) at 500∘C, the value of Kp was found to be 0.5. Calculate the value of Kc.

Which of the following compounds will show geometrical isomerism?

The carbon atom in acylium ion formed in Friedal- crafts acylation is hybridized.

Find out total the number of species in which at least two nonaxial d - orbital are used is bond formation. SO2−2,ClO−2,XeO4+6,XeO3F2,XeOF4,IO2F−2,SOF4,S3O2−6,S2O2−3

Which of the following compounds will form significant amount of meta product during mono-nitration reaction?

Which of the following molecules has the largest bond angle?

How to balance the equation by redox reaction by ion -electron method in basic medium

Give the dehydration product(s) of:

Calculate the mole fraction of ethanol and water in a sample of rectified spirit which contains 46% ethanol by mass

Define one kilo-calorie of heat.

The ratio of the radii of the first three bohr orbits for hydrogen atom is:

The work done in an open vessel at 300K, when 112 g iron reacts with dilute HCl is

Using IUPAC norms write the systematic names of the following: (i) [Co(NH3)6]Cl3 (ii) [Pt(NH3)2Cl(NH2CH3)]Cl (iii) [Ti(H2O)6]3+ (iv) [Mn(H2O)6]2+ (v) [NiCl4]2− (vi) [Ni(NH3)6]Cl2 (vii) [Co(en)3]3+ (viii) [Ni(CO)4]

In how many reaction(s), gemdihalide is obtained as a major product?

As I learnt for 'l' values 0,1,2,3 we have the orbitals as s,p,d and f respectively. So if the value of l is greater than 3 then?

Iodine is soluble in water in the presence of

X+2H2OElectrolysis−−−−−−−→C2H4Cl2−−→Y Then X and Y are

Which is the smallest atom? a. S b. Si c. P d. He

What happens when S reacts with hot and conc. H2SO4?

The number of primary, secondary and tertiary amines possible with the molecular fomula C3H9N is:

The reagent that is used up first in a chemical reaction is called:

The enthalpy change for the combustion of ethanol at 298 K and 1 atm is given below CH3-CH2OH(l) + 3O2(g)------------à 2CO2 (g)+ 3H2O(l) ∆H=-1363Kj.Calculate the internal energy change for the above reaction?

What is Ostwald's process? With reactions please!

Which hydrogen like species will have the same radius as that of Bohr's first orbit of hydrogen atom?