46295 + Interview Questions in Chemistry

1.	Which of the following statements is wrong about d-block elements
Answer» Which of the following statements is wrong about d-block elements

Discussion

2.	Geometrical isomerism is not possible in
Answer» Geometrical isomerism is not possible in

Discussion

3.	Which of the following orders is true regarding the basic nature of NH2 group?
Answer» Which of the following orders is true regarding the basic nature of NH₂ group?

Discussion

4.	The number of S-S bonds in sulphur trioxide trimer (S3O9) is:
Answer» The number of S-S bonds in sulphur trioxide trimer (S₃O₉) is:

Discussion

5.	Different example of state, phase and component.
Answer» Different example of state, phase and component.

Discussion

6.	Sulphur dioxide and SiCl4 has 1 lone pair and 2 bond pairs. But I am not able to calculate it using the formula 1/2[V+L+A-C] . Can I please get help?
Answer» Sulphur dioxide and SiCl4 has 1 lone pair and 2 bond pairs. But I am not able to calculate it using the formula 1/2[V+L+A-C] . Can I please get help?

Discussion

7.	The enthalpies of formation of Al2O3 and Cr2O3 are −1569 KJ and −1134 KJ respectively. ΔH for the reaction 2Al + Cr2O3 → 2Cr + Al2O3 is
Answer» The enthalpies of formation of $A l_{2} O_{3}$ and $C r_{2} O_{3}$ are $- 1569 K J$ and $- 1134 K J$ respectively. $Δ H$ for the reaction $2 A l + C r_{2} O_{3} \to 2 C r + A l_{2} O_{3}$ is

7.

The enthalpies of formation of Al2O3 and Cr2O3 are −1569 KJ and −1134 KJ respectively. ΔH for the reaction 2Al + Cr2O3 → 2Cr + Al2O3 is

Answer»

The enthalpies of formation of $A l_{2} O_{3}$ and $C r_{2} O_{3}$ are $- 1569 K J$ and $- 1134 K J$ respectively. $Δ H$ for the reaction

$2 A l + C r_{2} O_{3} \to 2 C r + A l_{2} O_{3}$ is

Discussion

8.	Which of the following has the highest value of Ksp?
Answer» Which of the following has the highest value of Ksp?

Discussion

9.	Which is a naturally occuring polymer [BHU 1980]
Answer» Which is a naturally occuring polymer [BHU 1980]

Discussion

10.	The osmotic pressure of which solution is maximum (consider that deci-molar solution of each is 90% dissociated)
Answer» The osmotic pressure of which solution is maximum (consider that deci-molar solution of each is 90% dissociated)

Discussion

11.	Which is the strongest acid?Why? HI, HF HCl HBr
Answer» Which is the strongest acid?Why? HI, HF HCl HBr

11.

Which is the strongest acid?Why? HI, HF HCl HBr

Answer»

Which is the strongest acid?Why?

HI, HF HCl HBr

Discussion

12.	Which has maximum internal energy at 290K (a) Neon gas (b) Nitrogen gas (c) Ozone gas (d) Equal for all
Answer» Which has maximum internal energy at 290K (a) Neon gas (b) Nitrogen gas (c) Ozone gas (d) Equal for all

12.

Which has maximum internal energy at 290K (a) Neon gas (b) Nitrogen gas (c) Ozone gas (d) Equal for all

Answer»

Which has maximum internal energy at 290K

(a) Neon gas (b) Nitrogen gas

(c) Ozone gas (d) Equal for all

Discussion

13.	Which one of the following statement is wrong?
Answer» Which one of the following statement is wrong?

Discussion

14.	The reaction, CO(g)+3H2(g)↔CH4(g)+H2O(g) is at equilibrium at 1300 K in a 1L flask. It also contain 0.30 mol of CO, 0.10 mol of H2 and 0.02 mol of H2O and an unknown amount of CH4 in the flask. Determine the concentration of CH4 in the mixture. The equilibrium constant, Kc for the reaction at the given temperature is 3.90.
Answer» The reaction, $C O (g) + 3 H_{2} (g) \leftrightarrow C H_{4} (g) + H_{2} O (g)$ is at equilibrium at 1300 K in a 1L flask. It also contain 0.30 mol of CO, 0.10 mol of $H_{2}$ and 0.02 mol of $H_{2} O$ and an unknown amount of $C H_{4}$ in the flask. Determine the concentration of $C H_{4}$ in the mixture. The equilibrium constant, $K_{c}$ for the reaction at the given temperature is 3.90.

Discussion

15.	The density of the vapour of a substance at 1 atm pressure and 500 K is 0.36 kg m−3. The vapour effuses through a small hole at a rate of 1.33 times faster than oxygen under the same condition. If the vapour behaves ideally at 1000 K, determine the average translational kinetic energy of a molecule. (in terms of J per molecule).
Answer» The density of the vapour of a substance at 1 atm pressure and 500 K is 0.36 kg m $^{- 3}$ . The vapour effuses through a small hole at a rate of 1.33 times faster than oxygen under the same condition. If the vapour behaves ideally at 1000 K, determine the average translational kinetic energy of a molecule. (in terms of J per molecule).

Discussion

16.	are the functional groups present in paracetamol.
Answer» are the functional groups present in paracetamol.

Discussion

17.	A sample of chloroform before using it as an anaesthetic is tested by
Answer» A sample of chloroform before using it as an anaesthetic is tested by

Discussion

18.	Number of unit cells in 4g of X(atomic mass = 40) which crystalizes in B.C.C. pattern is (N = Avogadro Number)
Answer» Number of unit cells in 4g of X(atomic mass = 40) which crystalizes in B.C.C. pattern is (N = Avogadro Number)

Discussion

19.	Dilute aqueous KMnO4 , at room temperature reacts with R - CH = CH - R to give
Answer» Dilute aqueous KMnO₄, at room temperature reacts with R - CH = CH - R to give

Discussion

20.	An ideal solution of two liquids A and B is placed in a cylinder containing piston. Piston is pulled out isothermally so that the volume of the liquid decreases but that of vapours increases. Negligibly small amount of liquid was left and mole fraction of A in vapour is 0.4. If P0A=0.4atm and P0B=1.2atm at the experimental temperature, which of the following is the total pressure at which the liquid is almost evaporated?
Answer» An ideal solution of two liquids A and B is placed in a cylinder containing piston. Piston is pulled out isothermally so that the volume of the liquid decreases but that of vapours increases. Negligibly small amount of liquid was left and mole fraction of A in vapour is 0.4. If $P_{A}^{0} = 0.4$ atm and $P_{B}^{0} = 1.2$ atm at the experimental temperature, which of the following is the total pressure at which the liquid is almost evaporated?

Discussion

21.	The purest form of iron is prepared by oxidising impurities from cast iron in a reverberatory furnace. Which iron ore is used to line the furnance? Explain by giving reaction.
Answer» The purest form of iron is prepared by oxidising impurities from cast iron in a reverberatory furnace. Which iron ore is used to line the furnance? Explain by giving reaction.

Discussion

22.	What is the oxidation no. Of B in NaBH4
Answer» What is the oxidation no. Of B in NaBH4

Discussion

23.	Which of the following undergoes nucleophilic substitution exclusivelyby SN1 mechanism?
Answer» Which of the following undergoes nucleophilic substitution exclusivelyby S_N1 mechanism?

Discussion

24.	The covalent alkaline earth metal halide (X=Cl, Br, I) is
Answer» The covalent alkaline earth metal halide $(X = C l, B r, I)$ is

Discussion

25.	Which of the following compound(s) is/are paramagnetic?
Answer» Which of the following compound(s) is/are paramagnetic?

Discussion

26.	Identify the state functions and path functions out of the following: enthalpy, entropy, heat, temperature, work, free energy.
Answer» Identify the state functions and path functions out of the following: enthalpy, entropy, heat, temperature, work, free energy.

Discussion

27.	In what manner is the long form of periodic table better than Mendeleev's periodic table? Explain with examples.
Answer» In what manner is the long form of periodic table better than Mendeleev's periodic table? Explain with examples.

Discussion

28.	Among the following the lowest degree of paramagnetism per mole of the compound at 298 K will be shown by:
Answer» Among the following the lowest degree of paramagnetism per mole of the compound at 298 K will be shown by:

Discussion

29.	What are polar solvents and non polar solvents? And why polar solvents and the ions of ionic compounds have strong attractions.
Answer» What are polar solvents and non polar solvents? And why polar solvents and the ions of ionic compounds have strong attractions.

Discussion

30.	a solution of KOH hydrolyses CH3CHClCH2CH3 and CH3CH2CH2CH2Cl which one of these is easily hydrolysed and why?
Answer» a solution of KOH hydrolyses $C H_{3} C H C l {C H}_{2} {C H}_{3}$ and $C H_{3} C H_{2} C H_{2} {C H}_{2} C l$ which one of these is easily hydrolysed and why?

Discussion

31.	Step wise rules for naming ring compounds
Answer» Step wise rules for naming ring compounds

Discussion

32.	IN the synthesis of sodium carbonate, the recovery of ammonia is done by treating NH4Cl with Ca(OH)2 The by product obtained in this process is (a) CaCl2 (b) NaCl (c) NaOH (d) NaHCO3
Answer» IN the synthesis of sodium carbonate, the recovery of ammonia is done by treating $N H_{4} C l$ with $C a (O H)_{2}$ The by product obtained in this process is (a) $C a C l_{2}$ (b) NaCl (c) NaOH (d) $N a H C O_{3}$

Discussion

33.	The product A is:
Answer» The product $A$ is:

Discussion

34.	Which of the following ‘B’ group vitamins can be stored in our body?
Answer» Which of the following ‘B’ group vitamins can be stored in our body?

Discussion

35.	In the case of which battery there was a continuous decrease in sales from 1992 to 1997?
Answer» In the case of which battery there was a continuous decrease in sales from 1992 to 1997?

Discussion

36.	Which of the following is a Lewis acid:
Answer» Which of the following is a Lewis acid:

Discussion

37.	What is hydrated radius
Answer» What is hydrated radius

Discussion

38.	Which of the following solutions will have pH close to 1.0?
Answer» Which of the following solutions will have pH close to 1.0?

Discussion

39.	Which of the following graphs represent the probability density curve for 4d electrons?
Answer» Which of the following graphs represent the probability density curve for 4d electrons?

Discussion

40.	Calculate the current (in mA) required to deposit 0.195g of platinum metal in 5 hours from a solution of [PtCl6]2- : (Atomic mass of Pt = 195) (a) 310 (b) 31 (c) 21.44 (d) 5.36
Answer» Calculate the current (in mA) required to deposit 0.195g of platinum metal in 5 hours from a solution of [PtCl₆]^2- : (Atomic mass of Pt = 195) (a) 310 (b) 31 (c) 21.44 (d) 5.36

40.

Calculate the current (in mA) required to deposit 0.195g of platinum metal in 5 hours from a solution of [PtCl6]2- : (Atomic mass of Pt = 195) (a) 310 (b) 31 (c) 21.44 (d) 5.36

Answer»

Calculate the current (in mA) required to deposit 0.195g of platinum metal in 5 hours from a solution of [PtCl₆]^2- : (Atomic mass of Pt = 195)

(a) 310 (b) 31 (c) 21.44 (d) 5.36

Discussion

41.	The conventional equilibrium constant expression (Kc) for the system below is:2ICl(s)⇌I2(s)+Cl2(g)
Answer» The conventional equilibrium constant expression $(K_{c})$ for the system below is: $2 I C l (s) ⇌ I_{2} (s) + C l_{2} (g)$

Discussion

42.	Which of the following compound is optically inactive?
Answer» Which of the following compound is optically inactive?

Discussion

43.	The following concentration were obtained for the formation of NH3 form N2 and H2 at equilibrium for the reaction N2(g)+3H2(g)⇌2NH3(g) [N2]=1.5×10−2M [H2]=3.0×10−2M [NH3]=1.2×10−2M Calculate equilibrium constant.
Answer» The following concentration were obtained for the formation of $N H_{3}$ form $N_{2}$ and $H_{2}$ at equilibrium for the reaction $N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g)$ $[N_{2}] = 1.5 \times 10^{- 2} M$ $[H_{2}] = 3.0 \times 10^{- 2} M$ $[N H_{3}] = 1.2 \times 10^{- 2} M$ Calculate equilibrium constant.

Discussion

44.	What is the chemical formula for Bayer's reagent??
Answer» What is the chemical formula for Bayer's reagent??

Discussion

45.	Which of the following is an example of liquid dishwashing detergent?
Answer» Which of the following is an example of liquid dishwashing detergent?

Discussion

46.	The equilibrium, SO2 Cl2(g)⇔SO2(g)+Cl2(g), has attained in a closed container at 250C. The inert gas, helium is introduced into the vessel. Which one of the following statements is correct?
Answer» The equilibrium, $S O_{2} C l_{2} (g) \Leftrightarrow S O_{2} (g) + C l_{2} (g)$ , has attained in a closed container at 250C. The inert gas, helium is introduced into the vessel. Which one of the following statements is correct?

Discussion

47.	If pressure becomes double at the same absolute temperature on 2 L CO2 , then the volume of CO2
Answer» If pressure becomes double at the same absolute temperature on 2 L $C O_{2}$ , then the volume of $C O_{2}$

Discussion

48.	The following diagram represents
Answer» The following diagram represents

48.

The following diagram represents

Answer»

The following diagram represents

Discussion

49.	The species having bond order different from that in CO is:
Answer» The species having bond order different from that in CO is:

Discussion

50.	In dehydrohalogenation reactions the preferred product is that alkene which has the greatest number of alkyl groups attached to the doubly bonded carbon atoms. This rule is known as:
Answer» In dehydrohalogenation reactions the preferred product is that alkene which has the greatest number of alkyl groups attached to the doubly bonded carbon atoms. This rule is known as:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following statements is wrong about d-block elements

Geometrical isomerism is not possible in

Which of the following orders is true regarding the basic nature of NH2 group?

The number of S-S bonds in sulphur trioxide trimer (S3O9) is:

Different example of state, phase and component.

Sulphur dioxide and SiCl4 has 1 lone pair and 2 bond pairs. But I am not able to calculate it using the formula 1/2[V+L+A-C] . Can I please get help?

The enthalpies of formation of Al2O3 and Cr2O3 are −1569 KJ and −1134 KJ respectively. ΔH for the reaction 2Al + Cr2O3 → 2Cr + Al2O3 is

Which of the following has the highest value of Ksp?

Which is a naturally occuring polymer [BHU 1980]

The osmotic pressure of which solution is maximum (consider that deci-molar solution of each is 90% dissociated)

Which is the strongest acid?Why? HI, HF HCl HBr

Which has maximum internal energy at 290K (a) Neon gas (b) Nitrogen gas (c) Ozone gas (d) Equal for all

Which one of the following statement is wrong?

are the functional groups present in paracetamol.

A sample of chloroform before using it as an anaesthetic is tested by

Number of unit cells in 4g of X(atomic mass = 40) which crystalizes in B.C.C. pattern is (N = Avogadro Number)

Dilute aqueous KMnO4 , at room temperature reacts with R - CH = CH - R to give

The purest form of iron is prepared by oxidising impurities from cast iron in a reverberatory furnace. Which iron ore is used to line the furnance? Explain by giving reaction.

What is the oxidation no. Of B in NaBH4

Which of the following undergoes nucleophilic substitution exclusivelyby SN1 mechanism?

The covalent alkaline earth metal halide (X=Cl, Br, I) is

Which of the following compound(s) is/are paramagnetic?

Identify the state functions and path functions out of the following: enthalpy, entropy, heat, temperature, work, free energy.

In what manner is the long form of periodic table better than Mendeleev's periodic table? Explain with examples.

Among the following the lowest degree of paramagnetism per mole of the compound at 298 K will be shown by:

What are polar solvents and non polar solvents? And why polar solvents and the ions of ionic compounds have strong attractions.

a solution of KOH hydrolyses CH3CHClCH2CH3 and CH3CH2CH2CH2Cl which one of these is easily hydrolysed and why?

Step wise rules for naming ring compounds

IN the synthesis of sodium carbonate, the recovery of ammonia is done by treating NH4Cl with Ca(OH)2 The by product obtained in this process is (a) CaCl2 (b) NaCl (c) NaOH (d) NaHCO3

The product A is:

Which of the following ‘B’ group vitamins can be stored in our body?

In the case of which battery there was a continuous decrease in sales from 1992 to 1997?

Which of the following is a Lewis acid:

What is hydrated radius

Which of the following solutions will have pH close to 1.0?

Which of the following graphs represent the probability density curve for 4d electrons?

Calculate the current (in mA) required to deposit 0.195g of platinum metal in 5 hours from a solution of [PtCl6]2- : (Atomic mass of Pt = 195) (a) 310 (b) 31 (c) 21.44 (d) 5.36

The conventional equilibrium constant expression (Kc) for the system below is:2ICl(s)⇌I2(s)+Cl2(g)

Which of the following compound is optically inactive?

The following concentration were obtained for the formation of NH3 form N2 and H2 at equilibrium for the reaction N2(g)+3H2(g)⇌2NH3(g) [N2]=1.5×10−2M [H2]=3.0×10−2M [NH3]=1.2×10−2M Calculate equilibrium constant.

What is the chemical formula for Bayer's reagent??

Which of the following is an example of liquid dishwashing detergent?

The equilibrium, SO2 Cl2(g)⇔SO2(g)+Cl2(g), has attained in a closed container at 250C. The inert gas, helium is introduced into the vessel. Which one of the following statements is correct?

If pressure becomes double at the same absolute temperature on 2 L CO2 , then the volume of CO2

The following diagram represents

The species having bond order different from that in CO is:

In dehydrohalogenation reactions the preferred product is that alkene which has the greatest number of alkyl groups attached to the doubly bonded carbon atoms. This rule is known as: