46295 + Interview Questions in Chemistry

1.	What happens if determinant is 0More than 0 Less than 0
Answer» What happens if determinant is 0 More than 0 Less than 0

Discussion

2.	for SN1 reaction concentration pf alkyl halide and nucleophile increases by 2 times then rate of the reaction ??A.increases by 4 times B.2 times increases C. 2 times decreases D.6 times increases E.none of thes
Answer» for SN1 reaction concentration pf alkyl halide and nucleophile increases by 2 times then rate of the reaction ??A.increases by 4 times B.2 times increases C. 2 times decreases D.6 times increases E.none of thes

Discussion

3.	Why does the Electromagnetic force not dominate if it is much stronger than the Gravitational force?
Answer» Why does the Electromagnetic force not dominate if it is much stronger than the Gravitational force?

Discussion

4.	5ml of a gaseous hydrocarbon (CxHy) was exploded with 30 ml of oxygen. The resulting gas on cooling to room temperature is found to measure 25ml of which 10ml are absorbed by NaOH and the remainder by Pyrogallol. The value of x + y is?___
Answer» 5ml of a gaseous hydrocarbon $(C_{x} H y)$ was exploded with 30 ml of oxygen. The resulting gas on cooling to room temperature is found to measure 25ml of which 10ml are absorbed by NaOH and the remainder by Pyrogallol. The value of x + y is?___

Discussion

5.	Which of the following crystals can exhibit paramagnetic property
Answer» Which of the following crystals can exhibit paramagnetic property

Discussion

6.	According to Moseley, a straight line graph is obtained on plotting
Answer» According to Moseley, a straight line graph is obtained on plotting

Discussion

7.	For the hypothetical reaction, the equilibrium constant (k) values are given A→B(k=k1) B→C(k=k2)C →D(k=k3) What is the value of equilibrium constant for A→D ?
Answer» For the hypothetical reaction, the equilibrium constant (k) values are given $A \to B (k = k_{1}) B \to C (k = k_{2}) C \to D (k = k_{3})$ What is the value of equilibrium constant for $A \to D$ ?

Discussion

8.	The temperature and pressure at Simla are 15.00 C and 72.0 cm of mercury and at Kalka these are 35.00 C and 76.0 cm of mercury. Find the ratio of air density at Kalka to the air density at Simla.
Answer» The temperature and pressure at Simla are 15. $0^{0}$ C and 72.0 cm of mercury and at Kalka these are 35. $0^{0}$ C and 76.0 cm of mercury. Find the ratio of air density at Kalka to the air density at Simla.

Discussion

9.	Arrange the following compounds in the decreasing order of reactivity with HBr:
Answer» Arrange the following compounds in the decreasing order of reactivity with $H B r$ :

Discussion

10.	What is 1MSD and 1VSD? EXPLAIN CONCEPT OF LEAST COUNT IN VERNEIR CALLIPERS AND SCREW GAUDGE?
Answer» What is 1MSD and 1VSD? EXPLAIN CONCEPT OF LEAST COUNT IN VERNEIR CALLIPERS AND SCREW GAUDGE?

Discussion

11.	25. Is chloropicrin is same as tear gas?
Answer» 25. Is chloropicrin is same as tear gas?

Discussion

12.	How does the doping increase the conductivity of semiconductors?
Answer» How does the doping increase the conductivity of semiconductors?

Discussion

13.	3. Density of equilibrium mixture of N2O4 and NO2 at 1 atm and 384K is 1.84 g/dm3 . Equilibrium constant of the following reaction is? N2O4 ----> 2NO2
Answer» 3. Density of equilibrium mixture of N2O4 and NO2 at 1 atm and 384K is 1.84 g/dm3 . Equilibrium constant of the following reaction is? N2O4 ----> 2NO2

Discussion

14.	What is meant by saying that the atomic mass of oxygen is 16
Answer» What is meant by saying that the atomic mass of oxygen is 16

Discussion

15.	When we pour fine sugar into another jar with different shape. Does the shape of the sugar changes?
Answer» When we pour fine sugar into another jar with different shape. Does the shape of the sugar changes?

Discussion

16.	Assuming ideal behaviour, the magnitude of log K for the following reaction at 25oC is x×10−1. The value of x is _____(integer answer)3HC≡CH(g)⇌C6H6(l)[Given:ΔfG0(HC≡CH)=−2.04×105Jmol−1;ΔG0f(C6H6)=−1.24×105Jmol−1;R=8.314JK−1mol−1]
Answer» Assuming ideal behaviour, the magnitude of log K for the following reaction at $25^{o} C$ is $x \times 10^{- 1}$ . The value of x is _____(integer answer) $3 H C \equiv C H_{(g)} ⇌ C_{6} H_{6 (l)}$ $[G i v e n : Δ_{f} G^{0} (H C \equiv C H) = - 2.04 \times 10^{5} J m o l^{- 1};$ $Δ G_{f}^{0} (C_{6} H_{6}) = - 1.24 \times 10^{5} J m o l^{- 1}; R = 8.314 J K^{- 1} m o l^{- 1}]$

16.

Assuming ideal behaviour, the magnitude of log K for the following reaction at 25oC is x×10−1. The value of x is _____(integer answer)3HC≡CH(g)⇌C6H6(l)[Given:ΔfG0(HC≡CH)=−2.04×105Jmol−1;ΔG0f(C6H6)=−1.24×105Jmol−1;R=8.314JK−1mol−1]

Answer»

Assuming ideal behaviour, the magnitude of log K for the following reaction at $25^{o} C$ is $x \times 10^{- 1}$ . The value of x is _____(integer answer)

$3 H C \equiv C H_{(g)} ⇌ C_{6} H_{6 (l)}$

$[G i v e n : Δ_{f} G^{0} (H C \equiv C H) = - 2.04 \times 10^{5} J m o l^{- 1};$

$Δ G_{f}^{0} (C_{6} H_{6}) = - 1.24 \times 10^{5} J m o l^{- 1}; R = 8.314 J K^{- 1} m o l^{- 1}]$

Discussion

17.	Which has bigger radius and why? 35Cl- or 37Cl-
Answer» Which has bigger radius and why? ³⁵Cl^- or ³⁷Cl^-

17.

Which has bigger radius and why? 35Cl- or 37Cl-

Answer»

Which has bigger radius and why?

³⁵Cl^- or ³⁷Cl^-

Discussion

18.	Hydrogen atom in ground state is excited by a monochromatic radiation of λ=975 oA. Number of spectral lines in the resultant spectrum emitted will be
Answer» Hydrogen atom in ground state is excited by a monochromatic radiation of $λ = 975 o A$ . Number of spectral lines in the resultant spectrum emitted will be

Discussion

19.	2.5 ml of a gaseous hydrocarbon exactly requires 12.5 ml of oxygen for complete combustion and produces 7.5 ml carbon dioxide and 10 ml water vapour all volumes are measured at the same pressure and temperature show that the d gay-lussac's law of volume combination
Answer» 2.5 ml of a gaseous hydrocarbon exactly requires 12.5 ml of oxygen for complete combustion and produces 7.5 ml carbon dioxide and 10 ml water vapour all volumes are measured at the same pressure and temperature show that the d gay-lussac's law of volume combination

Discussion

20.	Which of the following is true in case of reversible adiabatic expansion?
Answer» Which of the following is true in case of reversible adiabatic expansion?

Discussion

21.	Total number of voids in 0.45 mol of a compound forming a hexagonal close packed structure is_______ ×1023. (Round off to the nearest integer)
Answer» Total number of voids in $0.45 m o l$ of a compound forming a hexagonal close packed structure is_______ $\times 10^{23} .$ (Round off to the nearest integer)

Discussion

22.	The standard reduction potential of oxygen in acidic solution is +1.23 V. What is the standard reduction potential of oxygen in basic solution? (a) +0.404 V (b) −0.404 V (c) +2.056 V (d) −2.056 V
Answer» The standard reduction potential of oxygen in acidic solution is +1.23 V. What is the standard reduction potential of oxygen in basic solution? (a) +0.404 V (b) −0.404 V (c) +2.056 V (d) −2.056 V

Discussion

23.	pH of two solutions : I. 50 ml of 0.2 M~HCl + 50 ml of 0.2 M HA (Ka=1.0×10−5) and II. 50 ml of 0.2 M HCl + 50 ml of 0.2 M NaA will be respectively
Answer» pH of two solutions : I. 50 ml of 0.2 M~HCl + 50 ml of 0.2 M HA $(K_{a} = 1.0 \times 10^{- 5})$ and II. 50 ml of 0.2 M HCl + 50 ml of 0.2 M NaA will be respectively

Discussion

24.	. What is Baeyer’s reagent? What is its function
Answer» . What is Baeyer’s reagent? What is its function

Discussion

25.	Assuming isothermal conditions, if the ratio of radius of a spherical bubble at the bottom and at the surface of the lake is 1:2, then find the depth of the lake.(Take, 1 atm=10 m column of water, g=10 ms−2)
Answer» Assuming isothermal conditions, if the ratio of radius of a spherical bubble at the bottom and at the surface of the lake is $1 : 2$ , then find the depth of the lake. $($ Take, $1 atm = 10 m$ column of water, $g = 10 {ms}^{- 2})$

Discussion

26.	68.Draw the structure of molecular orbital of O2.
Answer» 68.Draw the structure of molecular orbital of O2.

Discussion

27.	When a pressure is applied over a system of ice ⇌ water, what will happen
Answer» When a pressure is applied over a system of ice $⇌$ water, what will happen

Discussion

28.	Question 54How would you bring about the following conversions? Name the process and write the reaction involved.(a) Ethanol to ethene(b) Propanol to propanoic acid
Answer» Question 54 How would you bring about the following conversions? Name the process and write the reaction involved. (a) Ethanol to ethene (b) Propanol to propanoic acid

28.

Question 54How would you bring about the following conversions? Name the process and write the reaction involved.(a) Ethanol to ethene(b) Propanol to propanoic acid

Answer»

Question 54

How would you bring about the following conversions? Name the process and write the reaction involved.

(a) Ethanol to ethene

(b) Propanol to propanoic acid

Discussion

29.	Under the same conditions of temperature and pressure you collect 2 litres of carbon dioxide, 3 litres of chlorine, 5 litres of hydrogen, 4 litres of nitrogen and 1 litre of sulphur dioxide. In which gas sample will there be:(a) The greatest number of molecules.(b) The least number of molecules.Justify your answer.
Answer» Under the same conditions of temperature and pressure you collect 2 litres of carbon dioxide, 3 litres of chlorine, 5 litres of hydrogen, 4 litres of nitrogen and 1 litre of sulphur dioxide. In which gas sample will there be: (a) The greatest number of molecules. (b) The least number of molecules. Justify your answer.

Discussion

30.	Select the correct I.U.P.A.C name for [Pt(C5H5N)4][PtCl4]:
Answer» Select the correct I.U.P.A.C name for $[P t (C_{5} H_{5} N)_{4}] [P t C l_{4}] :$

Discussion

31.	Assertion: Phosphoric acid is a tribasic acid Reason : Phosphoric acid furnishes three – OH group in solutionSelect one:a. assertion and reason are correct statements, and reason is the correctexplanation of the assertion. b. Assertion is wrong, but reason is correct statementc. Assertion is correct, but reason is wrong statement.d. Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
Answer» Assertion: Phosphoric acid is a tribasic acid Reason : Phosphoric acid furnishes three – OH group in solution Select one: a. assertion and reason are correct statements, and reason is the correct explanation of the assertion. b. Assertion is wrong, but reason is correct statement c. Assertion is correct, but reason is wrong statement. d. Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.

Discussion

32.	The E-isomer among the following is:
Answer» The E-isomer among the following is:

Discussion

33.	Use the following data to calculate ΔlatticH⊖ for NaBr. ΔsubH⊖ for sodium metal = 108.4 kJ mol−1, ionisation enthalpy of sodium = 496 kJ mol−1, electron gain enthalpy of bromine = -325 kJ mol−1, bond dissociation enthalpy of bromine = 192 kJ mol−1, ΔfH⊖ for NaBr(s) = -360. 1 kJ mol−1
Answer» Use the following data to calculate $Δ_{l a t t i c} H^{⊖}$ for NaBr. $Δ_{s u b} H^{⊖}$ for sodium metal = 108.4 kJ $m o l^{- 1}$ , ionisation enthalpy of sodium = 496 kJ $m o l^{- 1}$ , electron gain enthalpy of bromine = -325 kJ $m o l^{- 1}$ , bond dissociation enthalpy of bromine = 192 kJ $m o l^{- 1}$ , $Δ_{f} H^{⊖}$ for NaBr(s) = -360. 1 kJ $m o l^{- 1}$

Discussion

34.	Consider the following reaction: Barium adipateDry distillation−−−−−−−−−→Δ, −BaCO3(A)Zn−Hg−−−−→aq. HCl(B) Compound (B) is:
Answer» Consider the following reaction: $Barium adipate Dry distillation - -------- \to Δ, - B a C O_{3} (A) Z n - H g - --- \to a q . H C l (B)$ Compound (B) is:

Discussion

35.	The most acidic carboxylic acid among the following is:
Answer» The most acidic carboxylic acid among the following is:

Discussion

36.	1 Find the maximum possible distance between K and F if KF adopts NaCl structure and it's idge length is 200pm?Should relation between edge length and radius in FCC be applied to do the following problem2 Find the radio of an ion A+ if radii of B- ion is 75 pm and solid AB adopts rock salt structure with edge length 150 pm.
Answer» 1 Find the maximum possible distance between K and F if KF adopts NaCl structure and it's idge length is 200pm? Should relation between edge length and radius in FCC be applied to do the following problem 2 Find the radio of an ion A+ if radii of B- ion is 75 pm and solid AB adopts rock salt structure with edge length 150 pm.

Discussion

37.	pH of 0.1 M monobasic solution is found to be 2. Thus its osmotic pressure at T (K) is:
Answer» $p H$ of $0.1 M$ monobasic solution is found to be 2. Thus its osmotic pressure at $T (K)$ is:

Discussion

38.	Complete combustion of 3 g ethane gives x×1022 molecules of water. The value of x is (Round off to the nearest integer) [Use : NA=6×1023
Answer» Complete combustion of 3 g ethane gives $x \times 10^{22}$ molecules of water. The value of x is (Round off to the nearest integer) [Use : $N_{A} = 6 \times 10^{23}$

Discussion

39.	5 g of Zinc is treated separately with an excess ofI. dilute hydrochloric acid andII. aqueous sodium hydroxide.The ratio of the volumes of H2 evolved in these two reactions is:
Answer» 5 g of Zinc is treated separately with an excess of I. dilute hydrochloric acid and II. aqueous sodium hydroxide. The ratio of the volumes of $H_{2}$ evolved in these two reactions is:

Discussion

40.	68. The required energy for removal of electron from n excited and isolated hydrogen atom is(E1= -13.6eV) (a) =13.6 eV (b) >13.6 eV (c) 3.4 eV (d)
Answer» 68. The required energy for removal of electron from n excited and isolated hydrogen atom is(E1= -13.6eV) (a) =13.6 eV (b) >13.6 eV (c) <13.6 and >3.4 eV (d) <=3.4 eV

Discussion

41.	when 1 mole of oxalic acid is treated with excess of NaOH in dilute aqueous solution,108 KJ of heat is liberated,then the enthalpy of ionisation of oxalic acid is
Answer» when 1 mole of oxalic acid is treated with excess of NaOH in dilute aqueous solution,108 KJ of heat is liberated,then the enthalpy of ionisation of oxalic acid is

Discussion

42.	The alkene that has greatest negative heat of hydrogenation among the following is:
Answer» The alkene that has greatest negative heat of hydrogenation among the following is:

Discussion

43.	2. In a reaction A+B=C+D rate constant for forward and backward reaction are K1 and K2. What will be Equilibrium constant Kc.
Answer» 2. In a reaction A+B=C+D rate constant for forward and backward reaction are K1 and K2. What will be Equilibrium constant Kc.

Discussion

44.	Which of the following is used as food preservative ?
Answer» Which of the following is used as food preservative ?

Discussion

45.	14. Does Mg(NH4)PO4 gives NH3 on heating??
Answer» 14. Does Mg(NH4)PO4 gives NH3 on heating??

Discussion

46.	The boiling points of HF,HCl,HBr and HI follows the order:
Answer» The boiling points of $H F, H C l, H B r$ and $H I$ follows the order:

Discussion

47.	Why in esterification reaction oh part is removed from carboxylic acid
Answer» Why in esterification reaction oh part is removed from carboxylic acid

Discussion

48.	The diffusion coefficient of an ideal gas is proportional to its mean free path and mean speed. The absolute temperature of an ideal gas is increased 4 times and its pressure is increased 2 times. As a result, the diffusion coefficient of this gas increases x times. The value of x is
Answer» The diffusion coefficient of an ideal gas is proportional to its mean free path and mean speed. The absolute temperature of an ideal gas is increased 4 times and its pressure is increased 2 times. As a result, the diffusion coefficient of this gas increases x times. The value of x is

Discussion

49.	20. A: Two moles of Grignard reagent is consumed in the formation of tertiary alcohol from ester followed by hydrolysis. R: One mole of Grignard reagent convert ester into Ketone and second mole of Grignard reagent adds to Ketone.
Answer» 20. A: Two moles of Grignard reagent is consumed in the formation of tertiary alcohol from ester followed by hydrolysis. R: One mole of Grignard reagent convert ester into Ketone and second mole of Grignard reagent adds to Ketone.

Discussion

50.	tryptophan is a hetericyclic or aromatic amino acids if yes then how and why
Answer» tryptophan is a hetericyclic or aromatic amino acids if yes then how and why

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What happens if determinant is 0More than 0 Less than 0

for SN1 reaction concentration pf alkyl halide and nucleophile increases by 2 times then rate of the reaction ??A.increases by 4 times B.2 times increases C. 2 times decreases D.6 times increases E.none of thes

Why does the Electromagnetic force not dominate if it is much stronger than the Gravitational force?

5ml of a gaseous hydrocarbon (CxHy) was exploded with 30 ml of oxygen. The resulting gas on cooling to room temperature is found to measure 25ml of which 10ml are absorbed by NaOH and the remainder by Pyrogallol. The value of x + y is?___

Which of the following crystals can exhibit paramagnetic property

According to Moseley, a straight line graph is obtained on plotting

For the hypothetical reaction, the equilibrium constant (k) values are given A→B(k=k1) B→C(k=k2)C →D(k=k3) What is the value of equilibrium constant for A→D ?

The temperature and pressure at Simla are 15.00 C and 72.0 cm of mercury and at Kalka these are 35.00 C and 76.0 cm of mercury. Find the ratio of air density at Kalka to the air density at Simla.

Arrange the following compounds in the decreasing order of reactivity with HBr:

What is 1MSD and 1VSD? EXPLAIN CONCEPT OF LEAST COUNT IN VERNEIR CALLIPERS AND SCREW GAUDGE?

25. Is chloropicrin is same as tear gas?

How does the doping increase the conductivity of semiconductors?

3. Density of equilibrium mixture of N2O4 and NO2 at 1 atm and 384K is 1.84 g/dm3 . Equilibrium constant of the following reaction is? N2O4 ----> 2NO2

What is meant by saying that the atomic mass of oxygen is 16

When we pour fine sugar into another jar with different shape. Does the shape of the sugar changes?

Assuming ideal behaviour, the magnitude of log K for the following reaction at 25oC is x×10−1. The value of x is _____(integer answer)3HC≡CH(g)⇌C6H6(l)[Given:ΔfG0(HC≡CH)=−2.04×105Jmol−1;ΔG0f(C6H6)=−1.24×105Jmol−1;R=8.314JK−1mol−1]

Which has bigger radius and why? 35Cl- or 37Cl-

Hydrogen atom in ground state is excited by a monochromatic radiation of λ=975 oA. Number of spectral lines in the resultant spectrum emitted will be

2.5 ml of a gaseous hydrocarbon exactly requires 12.5 ml of oxygen for complete combustion and produces 7.5 ml carbon dioxide and 10 ml water vapour all volumes are measured at the same pressure and temperature show that the d gay-lussac's law of volume combination

Which of the following is true in case of reversible adiabatic expansion?

Total number of voids in 0.45 mol of a compound forming a hexagonal close packed structure is_______ ×1023. (Round off to the nearest integer)

The standard reduction potential of oxygen in acidic solution is +1.23 V. What is the standard reduction potential of oxygen in basic solution? (a) +0.404 V (b) −0.404 V (c) +2.056 V (d) −2.056 V

pH of two solutions : I. 50 ml of 0.2 M~HCl + 50 ml of 0.2 M HA (Ka=1.0×10−5) and II. 50 ml of 0.2 M HCl + 50 ml of 0.2 M NaA will be respectively

. What is Baeyer’s reagent? What is its function

Assuming isothermal conditions, if the ratio of radius of a spherical bubble at the bottom and at the surface of the lake is 1:2, then find the depth of the lake.(Take, 1 atm=10 m column of water, g=10 ms−2)

68.Draw the structure of molecular orbital of O2.

When a pressure is applied over a system of ice ⇌ water, what will happen

Question 54How would you bring about the following conversions? Name the process and write the reaction involved.(a) Ethanol to ethene(b) Propanol to propanoic acid

Select the correct I.U.P.A.C name for [Pt(C5H5N)4][PtCl4]:

The E-isomer among the following is:

Consider the following reaction: Barium adipateDry distillation−−−−−−−−−→Δ, −BaCO3(A)Zn−Hg−−−−→aq. HCl(B) Compound (B) is:

The most acidic carboxylic acid among the following is:

pH of 0.1 M monobasic solution is found to be 2. Thus its osmotic pressure at T (K) is:

Complete combustion of 3 g ethane gives x×1022 molecules of water. The value of x is (Round off to the nearest integer) [Use : NA=6×1023

5 g of Zinc is treated separately with an excess ofI. dilute hydrochloric acid andII. aqueous sodium hydroxide.The ratio of the volumes of H2 evolved in these two reactions is:

68. The required energy for removal of electron from n excited and isolated hydrogen atom is(E1= -13.6eV) (a) =13.6 eV (b) >13.6 eV (c) 3.4 eV (d)

when 1 mole of oxalic acid is treated with excess of NaOH in dilute aqueous solution,108 KJ of heat is liberated,then the enthalpy of ionisation of oxalic acid is

The alkene that has greatest negative heat of hydrogenation among the following is:

2. In a reaction A+B=C+D rate constant for forward and backward reaction are K1 and K2. What will be Equilibrium constant Kc.

Which of the following is used as food preservative ?

14. Does Mg(NH4)PO4 gives NH3 on heating??

The boiling points of HF,HCl,HBr and HI follows the order:

Why in esterification reaction oh part is removed from carboxylic acid

The diffusion coefficient of an ideal gas is proportional to its mean free path and mean speed. The absolute temperature of an ideal gas is increased 4 times and its pressure is increased 2 times. As a result, the diffusion coefficient of this gas increases x times. The value of x is

20. A: Two moles of Grignard reagent is consumed in the formation of tertiary alcohol from ester followed by hydrolysis. R: One mole of Grignard reagent convert ester into Ketone and second mole of Grignard reagent adds to Ketone.

tryptophan is a hetericyclic or aromatic amino acids if yes then how and why