46295 + Interview Questions in Chemistry

1.	The percentage of sulphur in an organic compound whose 0.32g produces 0.233g of BaSO4 [atomic weight of Ba= 137, S=32] is
Answer» The percentage of sulphur in an organic compound whose 0.32g produces 0.233g of $B a S O_{4}$ [atomic weight of Ba= 137, S=32] is

Discussion

2.	Which one possess a antifluorite structure
Answer» Which one possess a antifluorite structure

Discussion

3.	Which of the following words is most similar in meaning to the word underlined as used in the passage ? Inextricably
Answer» Which of the following words is most similar in meaning to the word underlined as used in the passage ? Inextricably

3.

Which of the following words is most similar in meaning to the word underlined as used in the passage ? Inextricably

Answer»

Which of the following words is most similar in meaning to the word underlined as used in the passage ?

Inextricably

Discussion

4.	The resistance of 0.01 N solution of an electrolyte is 210 Ω at 298 K with a cell constant of 0.88 cm−1. Calculate the conductivity and equivalent conductivity of the solution.
Answer» The resistance of 0.01 N solution of an electrolyte is 210 $Ω$ at 298 K with a cell constant of 0.88 $c m^{- 1}$ . Calculate the conductivity and equivalent conductivity of the solution.

Discussion

5.	Which of the options can be ′X′ in the following reaction? MnO−4+H++X⟶No reaction
Answer» Which of the options can be $^{'} X^{'}$ in the following reaction? $M n O_{4}^{-} + H^{+} + X ⟶ No reaction$

Discussion

6.	10 mL of H2O2 solution on treatment with KI and titration of liberated I2, required 10 mL of 1N hypo. Thus H2O2 is -
Answer» 10 mL of $H_{2} O_{2}$ solution on treatment with KI and titration of liberated $I_{2}$ , required 10 mL of 1N hypo. Thus $H_{2} O_{2}$ is -

Discussion

7.	The possible product(s) in the above reaction is/are:
Answer» The possible product(s) in the above reaction is/are:

Discussion

8.	The bond in the formation of fluorine molecule will be
Answer» The bond in the formation of fluorine molecule will be

8.

The bond in the formation of fluorine molecule will be

Answer»

The bond in the formation of fluorine molecule will be

Discussion

9.	The equilibrium : Cr2O2−7 →← 2CrO2−4 exists in
Answer» The equilibrium : $C r_{2} O_{7}^{2 -}_{\leftarrow}^{\to} 2 C r O_{4}^{2 -}$ exists in

Discussion

10.	The addition of tetraethyl lead to petrol
Answer» The addition of tetraethyl lead to petrol

Discussion

11.	For the reaction PCl5(g)⇌PCl3(g)+Cl2(g); the forward reaction at constant temperature is favoured by
Answer» For the reaction $P C l_{5} (g) ⇌ P C l_{3} (g) + C l_{2} (g)$ ; the forward reaction at constant temperature is favoured by

Discussion

12.	Which of the following have α-Hydrogen ?
Answer» Which of the following have $α$ -Hydrogen ?

Discussion

13.	The diamagnetic species is:
Answer» The diamagnetic species is:

Discussion

14.	Specify the hybridization of the central atom in the following species {N−3,NOCl,N2O}.
Answer» Specify the hybridization of the central atom in the following species ${N_{3}^{-}, N O C l, N_{2} O}$ .

Discussion

15.	An element has the electronic configuration 1s2,2s2 2p6,3s2 3p2. Its valency electrons are
Answer» An element has the electronic configuration $1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{2}$ . Its valency electrons are

15.

An element has the electronic configuration 1s2,2s2 2p6,3s2 3p2. Its valency electrons are

Answer»

An element has the electronic configuration $1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{2}$ . Its valency electrons are

Discussion

16.	Lithium has a BCC structure. Its density is 530 kg m−3 and its atomic mass is 6.94 g mol–1. Calculate the edge length of a unit cell of Lithium metal (NA=6.02×1023 mol−1)
Answer» Lithium has a BCC structure. Its density is 530 kg $m^{- 3}$ and its atomic mass is 6.94 g $m o l^{- 1}$ . Calculate the edge length of a unit cell of Lithium metal $(N_{A} = 6.02 \times 10^{23} m o l^{- 1})$

Discussion

17.	An element has the electronic configuration 1s2,2s2 2p6,3s2 3p2. Its valency electrons are[NCERT 1973]
Answer» An element has the electronic configuration $1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{2}$ . Its valency electrons are[NCERT 1973]

17.

An element has the electronic configuration 1s2,2s2 2p6,3s2 3p2. Its valency electrons are[NCERT 1973]

Answer»

An element has the electronic configuration $1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{2}$ . Its valency electrons are[NCERT 1973]

Discussion

18.	What is the pH of 0.001 M aniline solution? The ionization constant of aniline can be taken from Table 7.7. Calculate the degree of ionization of aniline in the solution. Also calculate the ionization constant of the conjugate acid of aniline.
Answer» What is the pH of 0.001 M aniline solution? The ionization constant of aniline can be taken from Table 7.7. Calculate the degree of ionization of aniline in the solution. Also calculate the ionization constant of the conjugate acid of aniline.

18.

What is the pH of 0.001 M aniline solution? The ionization constant of aniline can be taken from Table 7.7. Calculate the degree of ionization of aniline in the solution. Also calculate the ionization constant of the conjugate acid of aniline.

Answer»

What is the pH of 0.001 M aniline solution? The ionization constant of aniline can be taken from Table 7.7. Calculate the degree of ionization of aniline in the solution. Also calculate the ionization constant of the conjugate acid of aniline.

Discussion

19.	Which of the following cannot displace H2 from dil. Acid?
Answer» Which of the following cannot displace $H_{2}$ from dil. Acid?

Discussion

20.	Of the two allotropes – white and red phosphorus, __ Phosphorus does not react with alkali solution.
Answer» Of the two allotropes – white and red phosphorus, __ Phosphorus does not react with alkali solution.

Discussion

21.	In the estimation of sulphur by Carius method, 0.468 g of an organic sulphur compound afforded 0.668 g of barium sulphate. Find out the percentage of sulphur in the given compound.
Answer» In the estimation of sulphur by Carius method, 0.468 g of an organic sulphur compound afforded 0.668 g of barium sulphate. Find out the percentage of sulphur in the given compound.

Discussion

22.	The ionic radii of A+ and B− ions are 0.98×10–10m and 1.81×10–10m. The coordination number of each ion in AB is
Answer» The ionic radii of $A^{+}$ and $B^{-}$ ions are $0.98 \times 10^{- 10} m$ and $1.81 \times 10^{- 10} m$ . The coordination number of each ion in AB is

Discussion

23.	Zeolite is
Answer» Zeolite is

Discussion

24.	Decreasing order of reactivity of alkyl halide is
Answer» Decreasing order of reactivity of alkyl halide is

Discussion

25.	The product of the reaction given below is :
Answer» The product of the reaction given below is :

25.

The product of the reaction given below is :

Answer»

The product of the reaction given below is :

Discussion

26.	An organic compound undergoes first - order decomposition. The time taken for its decomposition of 18 and 110 of its initial concentration are t18 and t110 respectively. The value of t18t110×10 (take log 2 =0.3)
Answer» An organic compound undergoes first - order decomposition. The time taken for its decomposition of $\frac{1}{8}$ and $\frac{1}{10}$ of its initial concentration are $t_{\frac{1}{8}}$ and $t_{\frac{1}{10}}$ respectively. The value of $\frac{t_{\frac{1}{8}}}{t_{\frac{1}{10}}} \times 10$ (take log 2 =0.3)

Discussion

27.	Intermediate common to fatty acid and carbohydrate oxidation is:
Answer» Intermediate common to fatty acid and carbohydrate oxidation is:

Discussion

28.	C60 contains
Answer» $C_{60}$ contains

Discussion

29.	An ideal mono atomic gas undergoes a cyclic process ABCA as shown in the fig. The ratio of heat absorbed during AB to the work done on the gas during BC is:
Answer» An ideal mono atomic gas undergoes a cyclic process ABCA as shown in the fig. The ratio of heat absorbed during AB to the work done on the gas during BC is:

29.

An ideal mono atomic gas undergoes a cyclic process ABCA as shown in the fig. The ratio of heat absorbed during AB to the work done on the gas during BC is:

Answer»

An ideal mono atomic gas undergoes a cyclic process ABCA as shown in the fig. The ratio of heat absorbed during AB to the work done on the gas during BC is:

Discussion

30.	Consider the following cell reaction: 2Fe(s)+O2(g)+4H+(aq)→2Fe2+(aq)+2H2O(l) ; E∘=1.67 V At [Fe2+]=10−3M,P(O2)=0.1 atm and pH = 3, the cell potential at 25 ∘C is (given: 2.303RTF=0.0591)
Answer» Consider the following cell reaction: $2 F e (s) + O_{2} (g) + 4 H^{+} (a q) \to 2 F e^{2 +} (a q) + 2 H_{2} O (l); E^{\circ} = 1.67 V$ At $[F e^{2 +}] = 10^{- 3} M, P_{(O_{2})} = 0.1 a t m$ and pH = 3, the cell potential at $25^{\circ} C$ is (given: $\frac{2.303 R T}{F} = 0.0591$ )

Discussion

31.	Product on monobromination of this compound is
Answer» Product on monobromination of this compound is

31.

Product on monobromination of this compound is

Answer»

Product on monobromination of this compound is

Discussion

32.	Though nitrogen and phosphorous exhibits +5 oxidation state, nitrogen does not form pentahalide but phosphorous forms. Give reason.
Answer» Though nitrogen and phosphorous exhibits +5 oxidation state, nitrogen does not form pentahalide but phosphorous forms. Give reason.

Discussion

33.	Column−I Column−IIA) Free radical substitution P)CH3CH2=CH2+HBrOrganicperoxide−−−−−−−−−−→CH2CH2CH2BrB) Electrophillic addition Q)C2H5OHH+−−→C2H4+H2OC) Free radical addition R) Halogenation of alkanesD) Elimination S)CH3CH=CH2+HCl→CH3−CH−CH3 \| Cl
Answer» $C o l u m n - I C o l u m n - I I A) Free radical substitution P) C H_{3} C H_{2} = C H_{2} + H B r O r g a n i c p e r o x i d e - --------- \to C H_{2} C H_{2} C H_{2} B r B) Electrophillic addition Q) C_{2} H_{5} O H H^{+} - - \to C_{2} H_{4} + H_{2} O C) Free radical addition R) Halogenation of alkanes D) Elimination S) C H_{3} C H = C H_{2} + H C l \to C H_{3} - C H - C H_{3} \| C l$

Discussion

34.	Which of the following compounds have higher enol content than keto content?
Answer» Which of the following compounds have higher enol content than keto content?

Discussion

35.	(a) Write the structures of main products when benzene diazonium chloride (C6H5N+2Cl−) reacts with the following reagents : (i) CuCN/KCN (ii)H2O (iii)CH3CH2OH (b) Arrange the following: (i) C2H5NH2,C2H5OH,(CH3)3N - in the increasing order of their boiling point. (ii) Aniline, p-nitroaniline, p-methylaniline - in the increasing order of their basic strength.
Answer» (a) Write the structures of main products when benzene diazonium chloride $(C_{6} H_{5} N_{2}^{+} C l^{-})$ reacts with the following reagents : (i) $C u C N / K C N$ $(i i) H_{2} O$ $(i i i) C H_{3} C H_{2} O H$ (b) Arrange the following: $(i) C_{2} H_{5} N H_{2}, C_{2} H_{5} O H, (C H_{3})_{3} N$ - in the increasing order of their boiling point. (ii) Aniline, p-nitroaniline, p-methylaniline - in the increasing order of their basic strength.

Discussion

36.	What is the Standard enthalpy of formation of pure carbon
Answer» What is the Standard enthalpy of formation of pure carbon

Discussion

37.	A Carnot engine takes heat from a reservoir at 627∘ C and rejects heat to a sink at 27∘ C. Its efficiency will be
Answer» A Carnot engine takes heat from a reservoir at $627^{\circ} C$ and rejects heat to a sink at $27^{\circ} C$ . Its efficiency will be

Discussion

38.	1)copper has two naturally occurring isotopes copper 63 has an atomic mass of 62. 9 296 u and an abundance of 69. 1 5% what is the atomic mass of the second isotopic if the average atomic weight of copper is 63?
Answer» 1)copper has two naturally occurring isotopes copper 63 has an atomic mass of 62. 9 296 u and an abundance of 69. 1 5% what is the atomic mass of the second isotopic if the average atomic weight of copper is 63?

Discussion

39.	The value of Van't Hoff factor for aqueous KCL sol is close to 2, while the value of 'i' for ethanoic acid in benzene is nearly 0.5. Give reason?
Answer» The value of Van't Hoff factor for aqueous KCL sol is close to 2, while the value of 'i' for ethanoic acid in benzene is nearly 0.5. Give reason?

Discussion

40.	At 300 K and 1 atm pressure, the half-life of a sample of a gaseous compound is 100 sec. When the pressure is 0.5 atm the half-life is 50 sec. The order of reaction is:
Answer» At $300 K$ and 1 atm pressure, the half-life of a sample of a gaseous compound is $100 sec$ . When the pressure is 0.5 atm the half-life is $50 sec$ . The order of reaction is:

Discussion

41.	An oil drop has 7.99 × 10−19 C charge. How many electrons does this oil drop has?
Answer» An oil drop has 7.99 $\times$ $10^{- 19}$ C charge. How many electrons does this oil drop has?

Discussion

42.	In the reaction CH3CHO + HCN → CH3−CH(OH)CN H+/H2O−−−−−−−−→ CH3−CH(OH)COOH An asymmetric centre is generated. The acid obtained would be
Answer» In the reaction $C H_{3} C H O + H C N \to C H_{3} - C H (O H) C N H + / H_{2} O - ------- \to C H_{3} - C H (O H) C O O H$ An asymmetric centre is generated. The acid obtained would be

42.

In the reaction CH3CHO + HCN → CH3−CH(OH)CN H+/H2O−−−−−−−−→ CH3−CH(OH)COOH An asymmetric centre is generated. The acid obtained would be

Answer»

In the reaction

$C H_{3} C H O + H C N \to C H_{3} - C H (O H) C N H + / H_{2} O - ------- \to C H_{3} - C H (O H) C O O H$

An asymmetric centre is generated. The acid obtained would be

Discussion

43.	Explain fully the physical properties of ...- A . Haloalkanes B. Haloarenes
Answer» Explain fully the physical properties of ...- A . Haloalkanes B. Haloarenes

43.

Explain fully the physical properties of ...- A . Haloalkanes B. Haloarenes

Answer»

Explain fully the physical properties of ...-

A . Haloalkanes

B. Haloarenes

Discussion

44.	The electronic configurations of four elements are given below. Which of the corresponding elements has maximum total electronic spin?
Answer» The electronic configurations of four elements are given below. Which of the corresponding elements has maximum total electronic spin?

Discussion

45.	When the specific amount of wax is taken and Same amount of wax is uaus to make different shapes like cylindrical shape, spherical shape, triangular shape, then which shape will have minimum surface area?
Answer» When the specific amount of wax is taken and Same amount of wax is uaus to make different shapes like cylindrical shape, spherical shape, triangular shape, then which shape will have minimum surface area?

Discussion

46.	Which of the following forms an ideal solution?
Answer» Which of the following forms an ideal solution?

Discussion

47.	what is gay lussac's law of combining volumes of gases
Answer» what is gay lussac's law of combining volumes of gases

Discussion

48.	Can we use bromine water test to distinguish between phenol and benzoic acid?
Answer» Can we use bromine water test to distinguish between phenol and benzoic acid?

Discussion

49.	Consider the reaction to 2A + B gives products when constitution of B alone was doubled half life time does not change when concentration of A alone doubled the rate increases by 2 times what are the units of K and what is the order of the reaction?
Answer» Consider the reaction to 2A + B gives products when constitution of B alone was doubled half life time does not change when concentration of A alone doubled the rate increases by 2 times what are the units of K and what is the order of the reaction?

Discussion

50.	Which of the following is a homocyclic compound?
Answer» Which of the following is a homocyclic compound?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The percentage of sulphur in an organic compound whose 0.32g produces 0.233g of BaSO4 [atomic weight of Ba= 137, S=32] is

Which one possess a antifluorite structure

Which of the following words is most similar in meaning to the word underlined as used in the passage ? Inextricably

The resistance of 0.01 N solution of an electrolyte is 210 Ω at 298 K with a cell constant of 0.88 cm−1. Calculate the conductivity and equivalent conductivity of the solution.

Which of the options can be ′X′ in the following reaction? MnO−4+H++X⟶No reaction

10 mL of H2O2 solution on treatment with KI and titration of liberated I2, required 10 mL of 1N hypo. Thus H2O2 is -

The possible product(s) in the above reaction is/are:

The bond in the formation of fluorine molecule will be

The equilibrium : Cr2O2−7 →← 2CrO2−4 exists in

The addition of tetraethyl lead to petrol

For the reaction PCl5(g)⇌PCl3(g)+Cl2(g); the forward reaction at constant temperature is favoured by

Which of the following have α-Hydrogen ?

The diamagnetic species is:

Specify the hybridization of the central atom in the following species {N−3,NOCl,N2O}.

An element has the electronic configuration 1s2,2s2 2p6,3s2 3p2. Its valency electrons are

Lithium has a BCC structure. Its density is 530 kg m−3 and its atomic mass is 6.94 g mol–1. Calculate the edge length of a unit cell of Lithium metal (NA=6.02×1023 mol−1)

An element has the electronic configuration 1s2,2s2 2p6,3s2 3p2. Its valency electrons are[NCERT 1973]

What is the pH of 0.001 M aniline solution? The ionization constant of aniline can be taken from Table 7.7. Calculate the degree of ionization of aniline in the solution. Also calculate the ionization constant of the conjugate acid of aniline.

Which of the following cannot displace H2 from dil. Acid?

Of the two allotropes – white and red phosphorus, __ Phosphorus does not react with alkali solution.

In the estimation of sulphur by Carius method, 0.468 g of an organic sulphur compound afforded 0.668 g of barium sulphate. Find out the percentage of sulphur in the given compound.

The ionic radii of A+ and B− ions are 0.98×10–10m and 1.81×10–10m. The coordination number of each ion in AB is

Zeolite is

Decreasing order of reactivity of alkyl halide is

The product of the reaction given below is :

An organic compound undergoes first - order decomposition. The time taken for its decomposition of 18 and 110 of its initial concentration are t18 and t110 respectively. The value of t18t110×10 (take log 2 =0.3)

Intermediate common to fatty acid and carbohydrate oxidation is:

C60 contains

An ideal mono atomic gas undergoes a cyclic process ABCA as shown in the fig. The ratio of heat absorbed during AB to the work done on the gas during BC is:

Consider the following cell reaction: 2Fe(s)+O2(g)+4H+(aq)→2Fe2+(aq)+2H2O(l) ; E∘=1.67 V At [Fe2+]=10−3M,P(O2)=0.1 atm and pH = 3, the cell potential at 25 ∘C is (given: 2.303RTF=0.0591)

Product on monobromination of this compound is

Though nitrogen and phosphorous exhibits +5 oxidation state, nitrogen does not form pentahalide but phosphorous forms. Give reason.

Column−I Column−IIA) Free radical substitution P)CH3CH2=CH2+HBrOrganicperoxide−−−−−−−−−−→CH2CH2CH2BrB) Electrophillic addition Q)C2H5OHH+−−→C2H4+H2OC) Free radical addition R) Halogenation of alkanesD) Elimination S)CH3CH=CH2+HCl→CH3−CH−CH3 | Cl

Which of the following compounds have higher enol content than keto content?

What is the Standard enthalpy of formation of pure carbon

A Carnot engine takes heat from a reservoir at 627∘ C and rejects heat to a sink at 27∘ C. Its efficiency will be

1)copper has two naturally occurring isotopes copper 63 has an atomic mass of 62. 9 296 u and an abundance of 69. 1 5% what is the atomic mass of the second isotopic if the average atomic weight of copper is 63?

The value of Van't Hoff factor for aqueous KCL sol is close to 2, while the value of 'i' for ethanoic acid in benzene is nearly 0.5. Give reason?

At 300 K and 1 atm pressure, the half-life of a sample of a gaseous compound is 100 sec. When the pressure is 0.5 atm the half-life is 50 sec. The order of reaction is:

An oil drop has 7.99 × 10−19 C charge. How many electrons does this oil drop has?

In the reaction CH3CHO + HCN → CH3−CH(OH)CN H+/H2O−−−−−−−−→ CH3−CH(OH)COOH An asymmetric centre is generated. The acid obtained would be

Explain fully the physical properties of ...- A . Haloalkanes B. Haloarenes

The electronic configurations of four elements are given below. Which of the corresponding elements has maximum total electronic spin?

When the specific amount of wax is taken and Same amount of wax is uaus to make different shapes like cylindrical shape, spherical shape, triangular shape, then which shape will have minimum surface area?

Which of the following forms an ideal solution?

what is gay lussac's law of combining volumes of gases

Can we use bromine water test to distinguish between phenol and benzoic acid?

Consider the reaction to 2A + B gives products when constitution of B alone was doubled half life time does not change when concentration of A alone doubled the rate increases by 2 times what are the units of K and what is the order of the reaction?

Which of the following is a homocyclic compound?