46295 + Interview Questions in Chemistry

1.	What happens to most probable kinetic energy and the energy of activation with increases in temperature?
Answer» What happens to most probable kinetic energy and the energy of activation with increases in temperature?

Discussion

2.	What inspired N. Bartllett for carrying out reaction between Xe and PtF6 ?
Answer» What inspired N. Bartllett for carrying out reaction between Xe and $P t F_{6}$ ?

Discussion

3.	Antiseptics and disinfectants either kill or prevent growth of microorganisms. Identify which of the following statements is not true.
Answer» Antiseptics and disinfectants either kill or prevent growth of microorganisms. Identify which of the following statements is not true.

Discussion

4.	Identify product 'P'
Answer» Identify product 'P'

Discussion

5.	The charge on 1 g ions of Al3+ is
Answer» The charge on 1 g ions of $A l^{3 +}$ is

Discussion

6.	Which of the following is correct order of Zeff:
Answer» Which of the following is correct order of $Z_{e f f}$ :

Discussion

7.	Which of the following has a permanent dipole moment?
Answer» Which of the following has a permanent dipole moment?

Discussion

8.	One mole of an ideal gas expands isothermally to ten times its original volume. The change in entropy at 298 K will be:
Answer» One mole of an ideal gas expands isothermally to ten times its original volume. The change in entropy at 298 K will be:

Discussion

9.	In the following arrangement y=1.0 mm,d=0.24 mm and D=1.2 m. The work function of the material of the emitter is 2.2 eV. The stopping potential V needed to stop the photo current will be
Answer» In the following arrangement $y = 1.0 m m, d = 0.24 m m$ and $D = 1.2 m$ . The work function of the material of the emitter is $2.2 e V$ . The stopping potential V needed to stop the photo current will be

Discussion

10.	29 g of butane is burnt in excess of O2 at STP. Find the volume of the CO2 gas produced at STP.
Answer» $29 g$ of butane is burnt in excess of $O_{2}$ at STP. Find the volume of the $C O_{2}$ gas produced at STP.

Discussion

11.	Which of the following is not formed by the ozonolysis of o-xylene
Answer» Which of the following is not formed by the ozonolysis of o-xylene

Discussion

12.	All of the orbitals in a given electron shell can have the same value of the quantum number except
Answer» All of the orbitals in a given electron shell can have the same value of the quantum number except

Discussion

13.	Consider an aqueous solution containing 0.001 M H2S and 0.25 M HCl. If the equilibrium constants for the formation HS− from H2S is 1.0×10−7 and that of S2− from HS− is 1.2×10−13. Then the concentration of S2− ions in aqueous solution is:
Answer» Consider an aqueous solution containing $0.001 M H_{2} S$ and $0.25 M H C l$ . If the equilibrium constants for the formation $H S^{-}$ from $H_{2} S$ is $1.0 \times 10^{- 7}$ and that of $S^{2 -}$ from $H S^{-}$ is $1.2 \times 10^{- 13}$ . Then the concentration of $S^{2 -}$ ions in aqueous solution is:

Discussion

14.	The adiabatic elasticity of hydrogen gas γ=1.4 at NTP is
Answer» The adiabatic elasticity of hydrogen gas $γ = 1.4$ at NTP is

Discussion

15.	What is the effect of temperature on chemisorption ?
Answer» What is the effect of temperature on chemisorption ?

Discussion

16.	Identify the final product (B) in the following sequence of reactions:
Answer» Identify the final product (B) in the following sequence of reactions:

Discussion

17.	In the given reaction C6H5CH=CH−CHO[x]−→C6H5−CH=CH−CH2OH. X will be
Answer» In the given reaction $C_{6} H_{5} C H = C H - C H O [x] - \to C_{6} H_{5} - C H = C H - C H_{2} O H .$ X will be

Discussion

18.	What will be the ratio of partial pressures of 10 moles of He and 5 moles of CH4 present in a reaction mixture?
Answer» What will be the ratio of partial pressures of $10$ moles of $H e$ and $5$ moles of $C H_{4}$ present in a reaction mixture?

Discussion

19.	When NO and NO2 are mixed, the following equilibria are readily obtained : 2NO2⇌N2O4 Kp=6.8 atm−1 and NO+NO2⇌N2O3 In an experiment when NO and NO2 are mixed in the ratio of 1:2, the final total pressure was 5.05 atm and the partial pressure of N2O4 was 1.7 atm. Calculate the equilibrium partial pressure of NO in atmosphere :
Answer» When $N O$ and $N O_{2}$ are mixed, the following equilibria are readily obtained : $2 N O_{2} ⇌ N_{2} O_{4} K_{p} = 6.8 a t m^{- 1}$ and $N O + N O_{2} ⇌ N_{2} O_{3}$ In an experiment when $N O$ and $N O_{2}$ are mixed in the ratio of $1 : 2$ , the final total pressure was $5.05 a t m$ and the partial pressure of $N_{2} O_{4}$ was $1.7 a t m$ . Calculate the equilibrium partial pressure of $N O$ in atmosphere :

Discussion

20.	Calculate the total number of molecules that will possess fractional bond order among the following molecules O2+2,N2+2,O+2,NO,CO,CO+,O−2,NO2+,CN−,NO2−,N−2
Answer» Calculate the total number of molecules that will possess fractional bond order among the following molecules $O_{2}^{2 +}, N_{2}^{2 +}, O_{2}^{+}, N O, C O, C O^{+}, O_{2}^{-}, N O^{2 +}, C N^{-}, N O^{2 -}, N_{2}^{-}$

Discussion

21.	B2H6+Na→X+Y B2H6+NaBH4→Y+Z Identify X, Y and Z.
Answer» $B_{2} H_{6} + N a \to X + Y$ $B_{2} H_{6} + N a B H_{4} \to Y + Z$ Identify X, Y and Z.

Discussion

22.	Among the following compounds the decreasing order of reactivity towards electrophilic substitution is
Answer» Among the following compounds the decreasing order of reactivity towards electrophilic substitution is

22.

Among the following compounds the decreasing order of reactivity towards electrophilic substitution is

Answer»

Among the following compounds the decreasing order of reactivity towards electrophilic substitution is

Discussion

23.	Hydrogen peroxide, in its reaction with KIO4 and NH2OH respectively is acting as:
Answer» Hydrogen peroxide, in its reaction with $K I O_{4}$ and $N H_{2} O H$ respectively is acting as:

Discussion

24.	Consider the following liquid-vapour equilibrium. Liquid→Vapour Which of the following relations is correct?
Answer» Consider the following liquid-vapour equilibrium. $L i q u i d \to V a p o u r$ Which of the following relations is correct?

24.

Consider the following liquid-vapour equilibrium. Liquid→Vapour Which of the following relations is correct?

Answer»

Consider the following liquid-vapour equilibrium.

$L i q u i d \to V a p o u r$

Which of the following relations is correct?

Discussion

25.	The IUPAC name of the given compound is:
Answer» The IUPAC name of the given compound is:

Discussion

26.	A closed tank has two compartments A and B, both filled with oxygen (assumed to be ideal gas). The partition separating the two compartments is fixed and is a perfect heat insulator (Figure 1). If the old partition is replaced by a new partition which can slide and conduct heat but does not allow the gas to leak across (Figure 2), the volume (in m3) of the compartment A after the system attains equilibrium is.
Answer» A closed tank has two compartments A and B, both filled with oxygen (assumed to be ideal gas). The partition separating the two compartments is fixed and is a perfect heat insulator (Figure 1). If the old partition is replaced by a new partition which can slide and conduct heat but does not allow the gas to leak across (Figure 2), the volume (in $m^{3})$ of the compartment A after the system attains equilibrium is.

Discussion

27.	Rennin employed in cheese industry is
Answer» Rennin employed in cheese industry is

Discussion

28.	The solubility of a salt of weak acid (AB) at pH= 3 is Y×10−3 mol L−1. The value of Y is. (Given that the value of solubility product of AB (Ksp)=2×10−10 and the value of ionization constant of HB(Ka)=1×10−8)
Answer» The solubility of a salt of weak acid (AB) at pH= 3 is $Y \times 10^{- 3} m o l L^{- 1}$ . The value of Y is. (Given that the value of solubility product of AB $(K_{s p}) = 2 \times 10^{- 10}$ and the value of ionization constant of $H B (K_{a}) = 1 \times 10^{- 8})$

Discussion

29.	Ozone in the stratosphere is depleted by:
Answer» Ozone in the stratosphere is depleted by:

Discussion

30.	Name the proceses from which chlorine is obtained as a by product. What will happen if an aqueous solution of NaCl is subjected to elefctrolysis?
Answer» Name the proceses from which chlorine is obtained as a by product. What will happen if an aqueous solution of NaCl is subjected to elefctrolysis?

Discussion

31.	Three structures are given below in which two glucose units are linked. Which of these linkages between glucose units are between C1 and C4 and which linkages are between C1 and C6? (a) (i) is between C1 and C4, (ii) and (iii) are between C1 and C6 (b) (i) and (ii) are between C1 and C4, (iii) is between C1 and C6 (c) (i) and (iii) are between C1 and C4 (ii) is between C1 and C6 (d) (i) and (iii) are between C1 and C6, (ii) is between C1 and C4
Answer» Three structures are given below in which two glucose units are linked. Which of these linkages between glucose units are between $C_{1} a n d C_{4}$ and which linkages are between $C_{1} a n d C_{6} ?$ (a) (i) is between C1 and C4, (ii) and (iii) are between C1 and C6 (b) (i) and (ii) are between C1 and C4, (iii) is between C1 and C6 (c) (i) and (iii) are between C1 and C4 (ii) is between C1 and C6 (d) (i) and (iii) are between C1 and C6, (ii) is between $C_{1} a n d C_{4}$

Discussion

32.	The refluxing of with acid gives [KCET 1996]
Answer» The refluxing of with acid gives [KCET 1996]

32.

The refluxing of with acid gives [KCET 1996]

Answer»

The refluxing of with acid gives

[KCET 1996]

Discussion

33.	Which among the following possess Van't Hoff factor equal to 4:
Answer» Which among the following possess Van't Hoff factor equal to 4:

Discussion

34.	Chlorination of CS2 in the presence of AlCl3 gives:
Answer» Chlorination of $C S_{2}$ in the presence of $A l C l_{3}$ gives:

Discussion

35.	The average velocity at T1K, and the most probable velocity at T2K of CO2 gas is 9.0×104 cm sec−1. The value of T1 is K and T2 is K.
Answer» The average velocity at $T_{1} K$ , and the most probable velocity at $T_{2} K$ of $C O_{2}$ gas is $9.0 \times 10^{4} {cm sec}^{- 1}$ . The value of $T_{1}$ is K and $T_{2}$ is K.

Discussion

36.	Calculate the amount of crystalline oxalic acid (equivalent weight = 63 g/eq.) required to prepare 250 mL of a N10 oxalic acid solution.
Answer» Calculate the amount of crystalline oxalic acid (equivalent weight = $63 g/eq.$ ) required to prepare 250 mL of a $\frac{N}{10}$ oxalic acid solution.

Discussion

37.	Write the principle of the following: (a) Zone refining (b) Froth floatation process (c) Chromatography
Answer» Write the principle of the following: (a) Zone refining (b) Froth floatation process (c) Chromatography

Discussion

38.	For an electron placed in the second orbit of the hydrogen atom, calculate the number of revolutions per second made by it around the nucleus.
Answer» For an electron placed in the second orbit of the hydrogen atom, calculate the number of revolutions per second made by it around the nucleus.

Discussion

39.	Of the given options, silica reacts only with .
Answer» Of the given options, silica reacts only with .

Discussion

40.	A binary solid (A+B−) has a rock salt structure. If the edge length is 400 pm and radius of cation is 75 pm, the radius of anion is
Answer» A binary solid $(A^{+} B^{-})$ has a rock salt structure. If the edge length is 400 pm and radius of cation is 75 pm, the radius of anion is

Discussion

41.	A metallic element has a cubic lattice. Each edge of the unit cell is 2A∘. The density of the metal is 2.5g/cm3. The unit cells in 200 g of metal are
Answer» A metallic element has a cubic lattice. Each edge of the unit cell is $2 A^{\circ}$ . The density of the metal is 2.5g/ $c m^{3}$ . The unit cells in 200 g of metal are

Discussion

42.	If 241.5 g of zinc sulphate (ZnSO4) reacts with 81 g of aluminium to give aluminium sulphate. Calculate the mass of the excess reagent left. 3ZnSO4+2Al→Al2(SO4)3+3Zn (take molar mass of Zn as 65 g)
Answer» If 241.5 g of zinc sulphate $(Z n S O_{4})$ reacts with 81 g of aluminium to give aluminium sulphate. Calculate the mass of the excess reagent left. $3 Z n S O_{4} + 2 A l \to A l_{2} (S O_{4})_{3} + 3 Z n$ (take molar mass of $Z n$ as 65 g)

Discussion

43.	When chloroform is treated with amine and KOH, we get [CPMT 1979]
Answer» When chloroform is treated with amine and KOH, we get [CPMT 1979]

43.

When chloroform is treated with amine and KOH, we get [CPMT 1979]

Answer»

When chloroform is treated with amine and KOH, we get

[CPMT 1979]

Discussion

44.	Carbylamine test is given by alc. KOH and
Answer» Carbylamine test is given by alc. KOH and

Discussion

45.	How many carbon atoms are present in 0.35 mol of C6H12O6 :
Answer» How many carbon atoms are present in 0.35 mol of $C_{6} H_{12} O_{6}$ :

Discussion

46.	The ozonolysis products of an olefin are OHC−CHO and OHC−CH2−CH2−CHO, the olefin is:
Answer» The ozonolysis products of an olefin are $O H C - C H O$ and $O H C - C H_{2} - C H_{2} - C H O$ , the olefin is:

Discussion

47.	Which of the following ligands are correctly represented in a spectrochemical series?
Answer» Which of the following ligands are correctly represented in a spectrochemical series?

Discussion

48.	500 mL of a solution of CaCO3 and NaOH was first titrated with N10 HCl using phenolphthalein indicator. 18.5 mL of HCl was required for the end point. After that methyl orange indicator was used and 2.5 mL of same HCl was required for the next end point. Find out the mass of CaCO3 in the mixture.
Answer» $500 m L$ of a solution of $C a C O_{3}$ and $N a O H$ was first titrated with $\frac{N}{10} H C l$ using phenolphthalein indicator. $18.5 m L$ of $H C l$ was required for the end point. After that methyl orange indicator was used and $2.5 m L$ of same $H C l$ was required for the next end point. Find out the mass of $C a C O_{3}$ in the mixture.

Discussion

49.	2 g of gas A is introduced in an evacuated flask at 25∘C. The pressure of the gas is 1 atm. Now 3 g of another gas B is introduced in the same flask and the total pressure becomes 1.5 atm. The ratio of molecular mass of A and B is:
Answer» $2 g$ of gas $A$ is introduced in an evacuated flask at $25^{\circ}$ C. The pressure of the gas is $1$ atm. Now $3 g$ of another gas $B$ is introduced in the same flask and the total pressure becomes $1.5$ atm. The ratio of molecular mass of $A$ and $B$ is:

Discussion

50.	Among the following, which one does not act as an intermediate in Hofmann rearrangement?
Answer» Among the following, which one does not act as an intermediate in Hofmann rearrangement?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What happens to most probable kinetic energy and the energy of activation with increases in temperature?

What inspired N. Bartllett for carrying out reaction between Xe and PtF6 ?

Antiseptics and disinfectants either kill or prevent growth of microorganisms. Identify which of the following statements is not true.

Identify product 'P'

The charge on 1 g ions of Al3+ is

Which of the following is correct order of Zeff:

Which of the following has a permanent dipole moment?

One mole of an ideal gas expands isothermally to ten times its original volume. The change in entropy at 298 K will be:

In the following arrangement y=1.0 mm,d=0.24 mm and D=1.2 m. The work function of the material of the emitter is 2.2 eV. The stopping potential V needed to stop the photo current will be

29 g of butane is burnt in excess of O2 at STP. Find the volume of the CO2 gas produced at STP.

Which of the following is not formed by the ozonolysis of o-xylene

All of the orbitals in a given electron shell can have the same value of the quantum number except

Consider an aqueous solution containing 0.001 M H2S and 0.25 M HCl. If the equilibrium constants for the formation HS− from H2S is 1.0×10−7 and that of S2− from HS− is 1.2×10−13. Then the concentration of S2− ions in aqueous solution is:

The adiabatic elasticity of hydrogen gas γ=1.4 at NTP is

What is the effect of temperature on chemisorption ?

Identify the final product (B) in the following sequence of reactions:

In the given reaction C6H5CH=CH−CHO[x]−→C6H5−CH=CH−CH2OH. X will be

What will be the ratio of partial pressures of 10 moles of He and 5 moles of CH4 present in a reaction mixture?

Calculate the total number of molecules that will possess fractional bond order among the following molecules O2+2,N2+2,O+2,NO,CO,CO+,O−2,NO2+,CN−,NO2−,N−2

B2H6+Na→X+Y B2H6+NaBH4→Y+Z Identify X, Y and Z.

Among the following compounds the decreasing order of reactivity towards electrophilic substitution is

Hydrogen peroxide, in its reaction with KIO4 and NH2OH respectively is acting as:

Consider the following liquid-vapour equilibrium. Liquid→Vapour Which of the following relations is correct?

The IUPAC name of the given compound is:

Rennin employed in cheese industry is

The solubility of a salt of weak acid (AB) at pH= 3 is Y×10−3 mol L−1. The value of Y is. (Given that the value of solubility product of AB (Ksp)=2×10−10 and the value of ionization constant of HB(Ka)=1×10−8)

Ozone in the stratosphere is depleted by:

Name the proceses from which chlorine is obtained as a by product. What will happen if an aqueous solution of NaCl is subjected to elefctrolysis?

The refluxing of with acid gives [KCET 1996]

Which among the following possess Van't Hoff factor equal to 4:

Chlorination of CS2 in the presence of AlCl3 gives:

The average velocity at T1K, and the most probable velocity at T2K of CO2 gas is 9.0×104 cm sec−1. The value of T1 is K and T2 is K.

Calculate the amount of crystalline oxalic acid (equivalent weight = 63 g/eq.) required to prepare 250 mL of a N10 oxalic acid solution.

Write the principle of the following: (a) Zone refining (b) Froth floatation process (c) Chromatography

For an electron placed in the second orbit of the hydrogen atom, calculate the number of revolutions per second made by it around the nucleus.

Of the given options, silica reacts only with .

A binary solid (A+B−) has a rock salt structure. If the edge length is 400 pm and radius of cation is 75 pm, the radius of anion is

A metallic element has a cubic lattice. Each edge of the unit cell is 2A∘. The density of the metal is 2.5g/cm3. The unit cells in 200 g of metal are

If 241.5 g of zinc sulphate (ZnSO4) reacts with 81 g of aluminium to give aluminium sulphate. Calculate the mass of the excess reagent left. 3ZnSO4+2Al→Al2(SO4)3+3Zn (take molar mass of Zn as 65 g)

When chloroform is treated with amine and KOH, we get [CPMT 1979]

Carbylamine test is given by alc. KOH and

How many carbon atoms are present in 0.35 mol of C6H12O6 :

The ozonolysis products of an olefin are OHC−CHO and OHC−CH2−CH2−CHO, the olefin is:

Which of the following ligands are correctly represented in a spectrochemical series?

500 mL of a solution of CaCO3 and NaOH was first titrated with N10 HCl using phenolphthalein indicator. 18.5 mL of HCl was required for the end point. After that methyl orange indicator was used and 2.5 mL of same HCl was required for the next end point. Find out the mass of CaCO3 in the mixture.

2 g of gas A is introduced in an evacuated flask at 25∘C. The pressure of the gas is 1 atm. Now 3 g of another gas B is introduced in the same flask and the total pressure becomes 1.5 atm. The ratio of molecular mass of A and B is:

Among the following, which one does not act as an intermediate in Hofmann rearrangement?