1708 + Interview Questions in Chemistry

1.	Statement - 1: Complexes containing three bidentate ligands do not show optical activity.Statement - 2: Octahedral complex [Co(NH3)4Cl2]Cl shows geometrical isomerism.
Answer» Statement - 1: Complexes containing three bidentate ligands do not show optical activity. Statement - 2: Octahedral complex $[C o (N H_{3})_{4} C l_{2}] C l$ shows geometrical isomerism.

Discussion

2.	Dalton's Atomic Theory was able to explain
Answer» Dalton's Atomic Theory was able to explain

Discussion

3.	Fo an ideal gas, consider only P-V work in going from initial state X to the final state Z. The final state Z can be reached by either of the two paths shown in the figure. [Take △ S as change in entropy and W as work done].Which of the following choice(s) is (are) correct? (2012)
Answer» Fo an ideal gas, consider only P-V work in going from initial state X to the final state Z. The final state Z can be reached by either of the two paths shown in the figure. [Take $△$ S as change in entropy and W as work done]. Which of the following choice(s) is (are) correct? (2012)

Discussion

4.	MgSO4 on reaction with NH4OH and Na2HPO4 forms a white crystalline precipitate. What is its formula?
Answer» $M g S O_{4}$ on reaction with $N H_{4} O H$ and $N a_{2} H P O_{4}$ forms a white crystalline precipitate. What is its formula?

Discussion

5.	The function y=f(x) is the solution of the differential equation dydx+xyx2−1=x4+2x√1−x2 in (-1, 1) satisfying f(0) =0. Then ∫√32−√32f(x)d(x) is
Answer» The function $y = f (x)$ is the solution of the differential equation $\frac{d y}{d x} + \frac{x y}{x^{2} - 1} = \frac{x^{4} + 2 x}{\sqrt{1 - x^{2}}}$ in (-1, 1) satisfying f(0) =0. Then $\int_{\frac{- \sqrt{3}}{2}}^{\frac{\sqrt{3}}{2}} f (x) d (x)$ is

Discussion

6.	The Solubility s of AgCl(s) in pure water and in 0.1 M NaCl at 25∘C respectively are:Ksp (AgCl) = 2.8 × 10−10
Answer» The Solubility $s$ of $A g C l (s)$ in pure water and in $0.1 M$ $N a C l$ at $25^{\circ} C$ respectively are: $K_{s p} (A g C l)$ = $2.8 \times 10^{- 10}$

6.

The Solubility s of AgCl(s) in pure water and in 0.1 M NaCl at 25∘C respectively are:Ksp (AgCl) = 2.8 × 10−10

Answer»

The Solubility $s$ of $A g C l (s)$ in pure water and in $0.1 M$ $N a C l$ at $25^{\circ} C$ respectively are:

$K_{s p} (A g C l)$ = $2.8 \times 10^{- 10}$

Discussion

7.	The Zieglar-Natta catalysts are
Answer» The Zieglar-Natta catalysts are

Discussion

8.	Mg + H2SO4 → A–– + H2 (Mg) (dilute) Mg + 2H2SO4 → A–– + B–– + 2H2O. (Concentrated) A & B are
Answer» $M g + H_{2} S O_{4} \to A - - + H_{2} (M g) (d i l u t e)$ $M g + 2 H_{2} S O_{4} \to A - - + B - - + 2 H_{2} O . (C o n c e n t r a t e d)$ A & B are

8.

Mg + H2SO4 → A–– + H2 (Mg) (dilute) Mg + 2H2SO4 → A–– + B–– + 2H2O. (Concentrated) A & B are

Answer»

$M g + H_{2} S O_{4} \to A - - + H_{2} (M g) (d i l u t e)$

$M g + 2 H_{2} S O_{4} \to A - - + B - - + 2 H_{2} O . (C o n c e n t r a t e d)$ A & B are

Discussion

9.	A gas of volume 2000ml is kept in a vessel at a pressure of 103 pascals at a temperature of 27∘ C. If the pressure is increased to 105 pascals at the same temperature, the volume of the gas becomes
Answer» A gas of volume 2000ml is kept in a vessel at a pressure of $10^{3}$ pascals at a temperature of $27^{\circ} C$ . If the pressure is increased to $10^{5}$ pascals at the same temperature, the volume of the gas becomes

Discussion

10.	The amount of urea to be dissolved in 500 ml of water (K =18.6 K mole-1 in 100g solvent) to produce a depression of 0.186°C in freezing point is
Answer» The amount of urea to be dissolved in 500 ml of water (K =18.6 K mole^-1 in 100g solvent) to produce a depression of 0.186°C in freezing point is

Discussion

11.	Maximum pKb value is of
Answer» Maximum $p K_{b}$ value is of

Discussion

12.	The conversion of molecules A to B follows second order kinetics. Doubling the concentration of A will increase the rate of formation of B by a factor of
Answer» The conversion of molecules A to B follows second order kinetics. Doubling the concentration of A will increase the rate of formation of B by a factor of

Discussion

13.	The heat evolved when 0.25 mole of hydrochloric acid in solution is neutralized by 0.25 mole of Sodium hydroxide solution is :
Answer» The heat evolved when 0.25 mole of hydrochloric acid in solution is neutralized by 0.25 mole of Sodium hydroxide solution is :

Discussion

14.	HX is a weak acid (Ka=10−5). It forms a salt NaX having concentration of 0.1M, on reacting with caustic soda. What is the degree of hydrolysis (h) of the salt?
Answer» $H X$ is a weak acid $(K_{a} = 10^{- 5}) .$ It forms a salt $N a X$ having concentration of $0.1 M$ , on reacting with caustic soda. What is the degree of hydrolysis ( $h$ ) of the salt?

Discussion

15.	pKb of NH4OH is 5. The pH of a mixture containing 10 mL of 0.3 M NH4OH and 200 mL of 0.1 M (NH4)3PO4rounded to the nearest integer is?8
Answer» p $K_{b}$ of $N H_{4} O H$ is 5. The pH of a mixture containing 10 mL of 0.3 M $N H_{4} O H$ and 200 mL of 0.1 M $({NH}_{4})_{3} {PO}_{4}$ rounded to the nearest integer is? 8

Discussion

16.	When an electron jumps from 5th orbit to 2nd orbit, it emits a radiation whose spectral line corresponds to:
Answer» When an electron jumps from 5^th orbit to 2^nd orbit, it emits a radiation whose spectral line corresponds to:

Discussion

17.	Cis-2-butene and trans-2-butene are
Answer» Cis-2-butene and trans-2-butene are

Discussion

18.	Which one of the following has an optical isomer?
Answer» Which one of the following has an optical isomer?

Discussion

19.	The rate of diffusion of Methane at certain temperature is 2 times that of gas X. The molecular mass of X is___.
Answer» The rate of diffusion of Methane at certain temperature is 2 times that of gas X. The molecular mass of X is___.

Discussion

20.	Which of the following will produce chiral molecule(s) after reaction is completed.
Answer» Which of the following will produce chiral molecule(s) after reaction is completed.

Discussion

21.	Calculate the pH of a solution of 0.10 M acetic acid after 50.0 mL of 0.10 M acetic acid solution is treated with 25.0 mL of 0.10 M NaOH. (Ka of acetic acid = 1.8×10−5)
Answer» Calculate the pH of a solution of 0.10 M acetic acid after 50.0 mL of 0.10 M acetic acid solution is treated with 25.0 mL of 0.10 M NaOH. ( $K_{a}$ of acetic acid = $1.8 \times 10^{- 5}$ )

Discussion

22.	Consider the following reactions & identify A, X, Y & Z
Answer» Consider the following reactions & identify A, X, Y & Z

Discussion

23.	The alkene formed after the rearrangement of the given compound at low temperatures will be:
Answer» The alkene formed after the rearrangement of the given compound at low temperatures will be:

Discussion

24.	Which of the following is an analgesic?
Answer» Which of the following is an analgesic?

Discussion

25.	The major product U in the following reactions is
Answer» The major product U in the following reactions is

Discussion

26.	Which one of the following is not a greenhouse gas?
Answer» Which one of the following is not a greenhouse gas?

Discussion

27.	The number of E1 product(s) formed by the above reaction is .
Answer» The number of $E_{1}$ product(s) formed by the above reaction is .

Discussion

28.	Crystals of covalent compounds always have
Answer» Crystals of covalent compounds always have

Discussion

29.	Coordinationnumber for Cu is[AMU 1982]
Answer» Coordination number for Cu is [AMU 1982]

29.

Coordinationnumber for Cu is[AMU 1982]

Answer»

Coordination
number for Cu is

[AMU 1982]

Discussion

30.	For a reversible physisorption process,At pressure of 1 atm, fraction of surface covered is 0.3 i.e. (Θ=0.3). If K=kakd, then calculate the value of K
Answer» For a reversible physisorption process, At pressure of $1 a t m$ , fraction of surface covered is 0.3 i.e. $(Θ = 0.3)$ . If $K = \frac{k_{a}}{k_{d}}$ , then calculate the value of $K$

Discussion

31.	Paragraph 2The reactions of Cl2 gas with cold-dilute and hot-concentrated NaOH in water give soduum salts fo two different oxoacids of chlorine, P and Q, respectively. The Cl2 gas reacts with SO2 gas, in presence of charcoal, to give a product R reacts with white phosphorus to give a compound S. On hydrolysis, S gives an oxoacid of phosphorus. 4. R, S and T, respectively, are (IIT-JEE, 2013)
Answer» Paragraph 2 The reactions of $C l_{2}$ gas with cold-dilute and hot-concentrated NaOH in water give soduum salts fo two different oxoacids of chlorine, P and Q, respectively. The $C l_{2}$ gas reacts with $S O_{2}$ gas, in presence of charcoal, to give a product R reacts with white phosphorus to give a compound S. On hydrolysis, S gives an oxoacid of phosphorus. 4. R, S and T, respectively, are (IIT-JEE, 2013)

Discussion

32.	Suppose, in your lab, you have run out of dilute Sulphuric acid. You require dilute H2SO4 for an important synthesis but only have concentrated Sulphuric acid, water and a glass beaker. How will you synthesize dilute H2SO4 ?
Answer» Suppose, in your lab, you have run out of dilute Sulphuric acid. You require dilute $H_{2} S O_{4}$ for an important synthesis but only have concentrated Sulphuric acid, water and a glass beaker. How will you synthesize dilute $H_{2} S O_{4}$ ?

Discussion

33.	An enzyme that converts maltose into glucose is:
Answer» An enzyme that converts maltose into glucose is:

Discussion

34.	Ascorbic acid is
Answer» Ascorbic acid is

Discussion

35.	An integrating factor of the differential equation xdydx+ylogx=xex x−12logx,(x>0) is
Answer» An integrating factor of the differential equation $x \frac{d y}{d x} + y log x = x e^{x} x^{- \frac{1}{2} log x}, (x > 0)$ is

Discussion

36.	Pyridine has 6 bonding ( π ) and 2 nonbonding electrons, which statement is true regarding resonance in pyridine?
Answer» Pyridine has 6 bonding ( $π$ ) and 2 nonbonding electrons, which statement is true regarding resonance in pyridine?

Discussion

37.	The incorrect reaction out of the following is:
Answer» The incorrect reaction out of the following is:

Discussion

38.	a and b are van der Waals constants. Which gas will liquefy easily?
Answer» a and b are van der Waals constants. Which gas will liquefy easily?

Discussion

39.	Order of reactivity towards nucleophilic substitution reaction of the compounds
Answer» Order of reactivity towards nucleophilic substitution reaction of the compounds

Discussion

40.	When a substance is dissolved in a solvent the vapour pressure of the solvent is decreased. This results in:
Answer» When a substance is dissolved in a solvent the vapour pressure of the solvent is decreased. This results in:

Discussion

41.	Assign number 1 for least to 4 for most to indicate the relative basic strength of the following:(I) C6H5NH2(II) p−NO2C6H4NH2(III) m−NO2C6H4NH2(IV) p−CH3OC6H4NH2
Answer» Assign number 1 for least to 4 for most to indicate the relative basic strength of the following: (I) $C_{6} H_{5} N H_{2}$ (II) $p - N O_{2} C_{6} H_{4} N H_{2}$ (III) $m - N O_{2} C_{6} H_{4} N H_{2}$ (IV) $p - C H_{3} O C_{6} H_{4} N H_{2}$

Discussion

42.	Arrange the following alcohols in the decreasing order of their ease of dehydration with H2SO4.
Answer» Arrange the following alcohols in the decreasing order of their ease of dehydration with H₂SO₄.

42.

Arrange the following alcohols in the decreasing order of their ease of dehydration with H2SO4.

Answer»

Arrange the following alcohols in the decreasing order of their ease of dehydration with H₂SO₄.

Discussion

43.	What is the IUPAC name of the following compound?CH3−CH2−C\|CH3=CH−CH2−CH3\|CH−CH2−CH3
Answer» What is the IUPAC name of the following compound? $C H_{3} - C H_{2} - C \| C H_{3} = C H - C H_{2} - C H_{3} \| C H - C H_{2} - C H_{3}$

Discussion

44.	Total number of hydroxyl groups present in a molecule of the major product P is .
Answer» Total number of hydroxyl groups present in a molecule of the major product P is .

Discussion

45.	Which of the following has the highest bolling point?
Answer» Which of the following has the highest bolling point?

Discussion

46.	Ionic radii are
Answer» Ionic radii are

Discussion

47.	The number of subshells present in the third shell is equal to?
Answer» The number of subshells present in the third shell is equal to?

Discussion

48.	Comment on the following reactions(i)CH3OH+NaCl→(ii)CH3OH+HCl→
Answer» Comment on the following reactions $(i) C H_{3} O H + N a C l \to (i i) C H_{3} O H + H C l \to$

Discussion

49.	For 109% labeled oleum if the number of moles of H2SO4 and free SO3 be x and y respectively,then what will be the value of x+yx−y?
Answer» For $109 %$ labeled oleum if the number of moles of $H_{2} S O_{4}$ and free $S O_{3}$ be x and y respectively,then what will be the value of $\frac{x + y}{x - y} ?$

Discussion

50.	How many of the following ten compounds will decolourize Bayer's reagent as well as Br2 water.
Answer» How many of the following ten compounds will decolourize Bayer's reagent as well as $B r_{2}$ water.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Statement - 1: Complexes containing three bidentate ligands do not show optical activity.Statement - 2: Octahedral complex [Co(NH3)4Cl2]Cl shows geometrical isomerism.

Dalton's Atomic Theory was able to explain

Fo an ideal gas, consider only P-V work in going from initial state X to the final state Z. The final state Z can be reached by either of the two paths shown in the figure. [Take △ S as change in entropy and W as work done].Which of the following choice(s) is (are) correct? (2012)

MgSO4 on reaction with NH4OH and Na2HPO4 forms a white crystalline precipitate. What is its formula?

The function y=f(x) is the solution of the differential equation dydx+xyx2−1=x4+2x√1−x2 in (-1, 1) satisfying f(0) =0. Then ∫√32−√32f(x)d(x) is

The Solubility s of AgCl(s) in pure water and in 0.1 M NaCl at 25∘C respectively are:Ksp (AgCl) = 2.8 × 10−10

The Zieglar-Natta catalysts are

Mg + H2SO4 → A–– + H2 (Mg) (dilute) Mg + 2H2SO4 → A–– + B–– + 2H2O. (Concentrated) A &amp; B are

A gas of volume 2000ml is kept in a vessel at a pressure of 103 pascals at a temperature of 27∘ C. If the pressure is increased to 105 pascals at the same temperature, the volume of the gas becomes

The amount of urea to be dissolved in 500 ml of water (K =18.6 K mole-1 in 100g solvent) to produce a depression of 0.186°C in freezing point is

Maximum pKb value is of

The conversion of molecules A to B follows second order kinetics. Doubling the concentration of A will increase the rate of formation of B by a factor of

The heat evolved when 0.25 mole of hydrochloric acid in solution is neutralized by 0.25 mole of Sodium hydroxide solution is :

HX is a weak acid (Ka=10−5). It forms a salt NaX having concentration of 0.1M, on reacting with caustic soda. What is the degree of hydrolysis (h) of the salt?

pKb of NH4OH is 5. The pH of a mixture containing 10 mL of 0.3 M NH4OH and 200 mL of 0.1 M (NH4)3PO4rounded to the nearest integer is?8

When an electron jumps from 5th orbit to 2nd orbit, it emits a radiation whose spectral line corresponds to:

Cis-2-butene and trans-2-butene are

Which one of the following has an optical isomer?

The rate of diffusion of Methane at certain temperature is 2 times that of gas X. The molecular mass of X is___.

Which of the following will produce chiral molecule(s) after reaction is completed.

Calculate the pH of a solution of 0.10 M acetic acid after 50.0 mL of 0.10 M acetic acid solution is treated with 25.0 mL of 0.10 M NaOH. (Ka of acetic acid = 1.8×10−5)

Consider the following reactions &amp; identify A, X, Y &amp; Z

The alkene formed after the rearrangement of the given compound at low temperatures will be:

Which of the following is an analgesic?

The major product U in the following reactions is

Which one of the following is not a greenhouse gas?

The number of E1 product(s) formed by the above reaction is .

Crystals of covalent compounds always have

Coordinationnumber for Cu is[AMU 1982]

For a reversible physisorption process,At pressure of 1 atm, fraction of surface covered is 0.3 i.e. (Θ=0.3). If K=kakd, then calculate the value of K

Suppose, in your lab, you have run out of dilute Sulphuric acid. You require dilute H2SO4 for an important synthesis but only have concentrated Sulphuric acid, water and a glass beaker. How will you synthesize dilute H2SO4 ?

An enzyme that converts maltose into glucose is:

Ascorbic acid is

An integrating factor of the differential equation xdydx+ylogx=xex x−12logx,(x&gt;0) is

Pyridine has 6 bonding ( π ) and 2 nonbonding electrons, which statement is true regarding resonance in pyridine?

The incorrect reaction out of the following is:

a and b are van der Waals constants. Which gas will liquefy easily?

Order of reactivity towards nucleophilic substitution reaction of the compounds

When a substance is dissolved in a solvent the vapour pressure of the solvent is decreased. This results in:

Assign number 1 for least to 4 for most to indicate the relative basic strength of the following:(I) C6H5NH2(II) p−NO2C6H4NH2(III) m−NO2C6H4NH2(IV) p−CH3OC6H4NH2

Arrange the following alcohols in the decreasing order of their ease of dehydration with H2SO4.

What is the IUPAC name of the following compound?CH3−CH2−C|CH3=CH−CH2−CH3|CH−CH2−CH3

Total number of hydroxyl groups present in a molecule of the major product P is .

Which of the following has the highest bolling point?

Ionic radii are

The number of subshells present in the third shell is equal to?

Comment on the following reactions(i)CH3OH+NaCl→(ii)CH3OH+HCl→

For 109% labeled oleum if the number of moles of H2SO4 and free SO3 be x and y respectively,then what will be the value of x+yx−y?

How many of the following ten compounds will decolourize Bayer's reagent as well as Br2 water.

Mg + H2SO4 → A–– + H2 (Mg) (dilute) Mg + 2H2SO4 → A–– + B–– + 2H2O. (Concentrated) A & B are

Consider the following reactions & identify A, X, Y & Z

An integrating factor of the differential equation xdydx+ylogx=xex x−12logx,(x>0) is