46295 + Interview Questions in Chemistry

1.	Give two physical properties of ethanoic acid.
Answer» Give two physical properties of ethanoic acid.

Discussion

2.	Why 23u of Na is replaced by 23g Na?although 1u=1.66×10^-24g
Answer» Why 23u of Na is replaced by 23g Na?although 1u=1.66×10^-24g

Discussion

3.	The type of bonds present in compound CaC2 are:
Answer» The type of bonds present in compound $C a C_{2}$ are:

Discussion

4.	12. In the aqueous solution of sulphuric acid the mole fraction of water is 0.85 . The molality of the solution is?
Answer» 12. In the aqueous solution of sulphuric acid the mole fraction of water is 0.85 . The molality of the solution is?

Discussion

5.	How to find an unreacted mass of asubstance
Answer» How to find an unreacted mass of asubstance

Discussion

6.	Which of the following element have the least ability to react with acid to liberate hydrogen?
Answer» Which of the following element have the least ability to react with acid to liberate hydrogen?

Discussion

7.	Which out of the following is not aromatic compounds?
Answer» Which out of the following is not aromatic compounds?

Discussion

8.	What are Molarity and molality represented by respectively?
Answer» What are Molarity and molality represented by respectively?

Discussion

9.	Which of the following secrete pancreatic juice?
Answer» Which of the following secrete pancreatic juice?

Discussion

10.	If solubility of Agcl in water is 0.07175 mg L at particular temperature then its solubility product will be
Answer» If solubility of Agcl in water is 0.07175 mg L at particular temperature then its solubility product will be

Discussion

11.	The shape of XeO3 molecule is __
Answer» The shape of $X e O_{3}$ molecule is __

Discussion

12.	In PO43- ion, number of bond pairs and lone pairs of electrons on phosphorus atom respectively are
Answer» In PO43- ion, number of bond pairs and lone pairs of electrons on phosphorus atom respectively are

Discussion

13.	Phenol on treatment with CO2 in the presence of NaOH followed by acidification produces compound X as the major product. X on treatement with(CH3CO)2O in the presence of a catalytic amount of H2SO4 produces:
Answer» Phenol on treatment with $C O_{2}$ in the presence of NaOH followed by acidification produces compound X as the major product. X on treatement with $(C H_{3} C O)_{2} O$ in the presence of a catalytic amount of $H_{2} S O_{4}$ produces:

Discussion

14.	The ratio of radii of first Bohr orbits of H, He+ and Li2+ is:
Answer» The ratio of radii of first Bohr orbits of $H, H e^{+}$ and $L i^{2 +}$ is:

Discussion

15.	Question 07 Considering the formation, breaking and strength of hydrogen bond, predict which of the following mixtures will show a positive deviation from Raoult's law? (a) Methanol and acetone (b) Chloroform and acetone (c) Nitric acid and water (d) Phenol and aniline
Answer» Question 07 Considering the formation, breaking and strength of hydrogen bond, predict which of the following mixtures will show a positive deviation from Raoult's law? (a) Methanol and acetone (b) Chloroform and acetone (c) Nitric acid and water (d) Phenol and aniline

Discussion

16.	An element X reacts with oxygen to form a compound X2O3.if the atomic mass of X is 91.5 the equivalent mass of X is
Answer» An element X reacts with oxygen to form a compound X2O3.if the atomic mass of X is 91.5 the equivalent mass of X is

Discussion

17.	when the coordination number of an ionic crystal (say CsCl) changes with change in temperature and pressure is there any change in the density of the unit cell?
Answer» when the coordination number of an ionic crystal (say CsCl) changes with change in temperature and pressure is there any change in the density of the unit cell?

Discussion

18.	A compound MX2, has observed and normal molecular masses 65.6 and 164 respectively.Calculate percentage of ionization of MX2 (1) 75%(2) 65%(3) 55%(4) 35%
Answer» A compound MX2, has observed and normal molecular masses 65.6 and 164 respectively.Calculate percentage of ionization of MX2 (1) 75%(2) 65%(3) 55%(4) 35%

Discussion

19.	12.Which one of the following compounds is more easily hydrolyzed by KOH and why? CH3CHClCH2CH3 or CH3CH2CH2Cl
Answer» 12.Which one of the following compounds is more easily hydrolyzed by KOH and why? CH3CHClCH2CH3 or CH3CH2CH2Cl

Discussion

20.	Do (AlH3)n contain bridge bond or hydrogen bond or simple bonding ?
Answer» Do (AlH3)n contain bridge bond or hydrogen bond or simple bonding ?

Discussion

21.	In a 0.2 molal aqueous solution of a weak acid HX, the degree of ionization is 0.3 at room temperature. Taking Kf for water as 1.85 oCm−1, the freezing point of the solution will be nearest to
Answer» In a 0.2 molal aqueous solution of a weak acid HX, the degree of ionization is 0.3 at room temperature. Taking $K_{f}$ for water as $1.85^{o} C m^{- 1}$ , the freezing point of the solution will be nearest to

Discussion

22.	In which of the following reactions is the enthalpy of neutralization least negative?
Answer» In which of the following reactions is the enthalpy of neutralization least negative?

Discussion

23.	The homolytic breaking of the Ca–Cb bond is easiest in
Answer» The homolytic breaking of the $C_{a} - C_{b}$ bond is easiest in

Discussion

24.	The standard heat of combustion of Al is −837.8 kJ mol−1 25∘C which of the following releases 250 kcal of heat?
Answer» The standard heat of combustion of $A l$ is $- 837.8 k J m o l^{- 1}$ $25^{\circ} C$ which of the following releases $250 k c a l$ of heat?

Discussion

25.	26. Which of the following will exhibit chirality ? A) 2- methylhexane B) 3- methylhexane C) Neopentane D) Isopentane
Answer» 26. Which of the following will exhibit chirality ? A) 2- methylhexane B) 3- methylhexane C) Neopentane D) Isopentane

Discussion

26.	What happens when(i) sodium metal is dropped in water ?(ii) sodium metal is heated in free supply of air ?(iii) sodium peroxide dissolves in water ?
Answer» What happens when (i) sodium metal is dropped in water ? (ii) sodium metal is heated in free supply of air ? (iii) sodium peroxide dissolves in water ?

26.

What happens when(i) sodium metal is dropped in water ?(ii) sodium metal is heated in free supply of air ?(iii) sodium peroxide dissolves in water ?

Answer»

What happens when

(i) sodium metal is dropped in water ?

(ii) sodium metal is heated in free supply of air ?

(iii) sodium peroxide dissolves in water ?

Discussion

27.	Which of the following alkenes is most stable?
Answer» Which of the following alkenes is most stable?

Discussion

28.	3 charges q ,2q and-3q are placed along the verices of equilateral triangle ,find the dipole moment of the system
Answer» 3 charges q ,2q and-3q are placed along the verices of equilateral triangle ,find the dipole moment of the system

Discussion

29.	Round off 222.9
Answer» Round off 222.9

Discussion

30.	amaong the following which has longest c-o bond? a) hcho.b)hcof.c)hconh2)d) hcoo
Answer» amaong the following which has longest c-o bond? a) hcho.b)hcof.c)hconh2)d) hcoo

Discussion

31.	Assertion (A) Order of the reaction can be zero or fractional. Reason (R) We cannot determine order from balanced chemical equation. (a) Both assertion and reason are correct and the reason is correct explanation of assertion (b) Both assertion and reason are correct, but reason does not explain assertion. (c) Assertion is correct, but reason is incorrect (d) Both assertion and reason are incorrect (e) Assertion is incorrect but reason is correct.
Answer» Assertion (A) Order of the reaction can be zero or fractional. Reason (R) We cannot determine order from balanced chemical equation. (a) Both assertion and reason are correct and the reason is correct explanation of assertion (b) Both assertion and reason are correct, but reason does not explain assertion. (c) Assertion is correct, but reason is incorrect (d) Both assertion and reason are incorrect (e) Assertion is incorrect but reason is correct.

31.

Assertion (A) Order of the reaction can be zero or fractional. Reason (R) We cannot determine order from balanced chemical equation. (a) Both assertion and reason are correct and the reason is correct explanation of assertion (b) Both assertion and reason are correct, but reason does not explain assertion. (c) Assertion is correct, but reason is incorrect (d) Both assertion and reason are incorrect (e) Assertion is incorrect but reason is correct.

Answer»

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Discussion

32.	Which of the following species is/are not known?
Answer» Which of the following species is/are not known?

Discussion

33.	In which of the following is the O−N−O bond angle highest ?
Answer» In which of the following is the $O - N - O$ bond angle highest ?

Discussion

34.	what is lyophillic and lyophobic colliolids?
Answer» what is lyophillic and lyophobic colliolids?

Discussion

35.	H2O(s)→ H2O(l) This phase transition is carried out at constant temperature and pressure, then work done during the process :
Answer» $H_{2} O (s) \to H_{2} O (l)$ This phase transition is carried out at constant temperature and pressure, then work done during the process :

35.

H2O(s)→ H2O(l) This phase transition is carried out at constant temperature and pressure, then work done during the process :

Answer»

$H_{2} O (s) \to H_{2} O (l)$

This phase transition is carried out at constant temperature and pressure, then work done during the process :

Discussion

36.	what is astrophysic
Answer» what is astrophysic

Discussion

37.	35.Which series has the highest energy in hydrogen spectra 1) Balmer 2) bracket 3) pfund 4) lyman
Answer» 35.Which series has the highest energy in hydrogen spectra 1) Balmer 2) bracket 3) pfund 4) lyman

Discussion

38.	The impedance of an a.c circuit is 200 Ω and the phase angle between current and emf 60o. What is the resistance of the circuit?
Answer» The impedance of an a.c circuit is 200 Ω and the phase angle between current and emf 60^o. What is the resistance of the circuit?

Discussion

39.	3.Why sulphur has vacent d orbital .What is the reason?
Answer» 3.Why sulphur has vacent d orbital .What is the reason?

Discussion

40.	52 In group 16 how acidic nature increases down the group and the thermal stability decreaes down the group explain this ?
Answer» 52 In group 16 how acidic nature increases down the group and the thermal stability decreaes down the group explain this ?

Discussion

41.	calculate the ratio of change in the mass of the molecules of a gas to the initial mass,if its speed is reduced to half and the ratio of initial and final pressure is 3:4
Answer» calculate the ratio of change in the mass of the molecules of a gas to the initial mass,if its speed is reduced to half and the ratio of initial and final pressure is 3:4

Discussion

42.	Which is more stable allylic carbocation or methoxy methyl carbocation?
Answer» Which is more stable allylic carbocation or methoxy methyl carbocation?

Discussion

43.	H alpha line of balmer series is 6500A(amstrong).The wavelength of H gamma series i
Answer» H alpha line of balmer series is 6500A(amstrong).The wavelength of H gamma series i

Discussion

44.	Why do chemical reaction involve absorption/evolution of heat
Answer» Why do chemical reaction involve absorption/evolution of heat

Discussion

45.	Write down properties of teflon.
Answer» Write down properties of teflon.

Discussion

46.	Four consecutive charges +q,-q,+q and -q are placed in order on the 4 consecutive corners of a square of side L. What is the work done in interchanging the positions of any two neighbouring charges of the oppposite sign
Answer» Four consecutive charges +q,-q,+q and -q are placed in order on the 4 consecutive corners of a square of side L. What is the work done in interchanging the positions of any two neighbouring charges of the oppposite sign

Discussion

47.	1 g mixture of CaCO3 abd NaCl reacts completely with 100ml of N/10 HCl. The %of CACO3 in the mixture is??
Answer» 1 g mixture of CaCO3 abd NaCl reacts completely with 100ml of N/10 HCl. The %of CACO3 in the mixture is??

Discussion

48.	What can be predicted from order of reaction ?
Answer» What can be predicted from order of reaction ?

Discussion

49.	Calculate the value of change in entropy for a reaction if it is at equilibrium at 253 oC .The enthalpy change for the reaction is 52.6 kJ mol−1.
Answer» Calculate the value of change in entropy for a reaction if it is at equilibrium at $253^{o} C$ .The enthalpy change for the reaction is $52.6 k J m o l^{- 1} .$

Discussion

50.	The total number of lone-pair of electrons in melamine is ___
Answer» The total number of lone-pair of electrons in melamine is ___

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Give two physical properties of ethanoic acid.

Why 23u of Na is replaced by 23g Na?although 1u=1.66×10^-24g

The type of bonds present in compound CaC2 are:

12. In the aqueous solution of sulphuric acid the mole fraction of water is 0.85 . The molality of the solution is?

How to find an unreacted mass of asubstance

Which of the following element have the least ability to react with acid to liberate hydrogen?

Which out of the following is not aromatic compounds?

What are Molarity and molality represented by respectively?

Which of the following secrete pancreatic juice?

If solubility of Agcl in water is 0.07175 mg L at particular temperature then its solubility product will be

The shape of XeO3 molecule is __

In PO43- ion, number of bond pairs and lone pairs of electrons on phosphorus atom respectively are

Phenol on treatment with CO2 in the presence of NaOH followed by acidification produces compound X as the major product. X on treatement with(CH3CO)2O in the presence of a catalytic amount of H2SO4 produces:

The ratio of radii of first Bohr orbits of H, He+ and Li2+ is:

Question 07 Considering the formation, breaking and strength of hydrogen bond, predict which of the following mixtures will show a positive deviation from Raoult's law? (a) Methanol and acetone (b) Chloroform and acetone (c) Nitric acid and water (d) Phenol and aniline

An element X reacts with oxygen to form a compound X2O3.if the atomic mass of X is 91.5 the equivalent mass of X is

when the coordination number of an ionic crystal (say CsCl) changes with change in temperature and pressure is there any change in the density of the unit cell?

A compound MX2, has observed and normal molecular masses 65.6 and 164 respectively.Calculate percentage of ionization of MX2 (1) 75%(2) 65%(3) 55%(4) 35%

12.Which one of the following compounds is more easily hydrolyzed by KOH and why? CH3CHClCH2CH3 or CH3CH2CH2Cl

Do (AlH3)n contain bridge bond or hydrogen bond or simple bonding ?

In a 0.2 molal aqueous solution of a weak acid HX, the degree of ionization is 0.3 at room temperature. Taking Kf for water as 1.85 oCm−1, the freezing point of the solution will be nearest to

In which of the following reactions is the enthalpy of neutralization least negative?

The homolytic breaking of the Ca–Cb bond is easiest in

The standard heat of combustion of Al is −837.8 kJ mol−1 25∘C which of the following releases 250 kcal of heat?

26. Which of the following will exhibit chirality ? A) 2- methylhexane B) 3- methylhexane C) Neopentane D) Isopentane

What happens when(i) sodium metal is dropped in water ?(ii) sodium metal is heated in free supply of air ?(iii) sodium peroxide dissolves in water ?

Which of the following alkenes is most stable?

3 charges q ,2q and-3q are placed along the verices of equilateral triangle ,find the dipole moment of the system

Round off 222.9

amaong the following which has longest c-o bond? a) hcho.b)hcof.c)hconh2)d) hcoo

Which of the following species is/are not known?

In which of the following is the O−N−O bond angle highest ?

what is lyophillic and lyophobic colliolids?

H2O(s)→ H2O(l) This phase transition is carried out at constant temperature and pressure, then work done during the process :

what is astrophysic

35.Which series has the highest energy in hydrogen spectra 1) Balmer 2) bracket 3) pfund 4) lyman

The impedance of an a.c circuit is 200 Ω and the phase angle between current and emf 60o. What is the resistance of the circuit?

3.Why sulphur has vacent d orbital .What is the reason?

52 In group 16 how acidic nature increases down the group and the thermal stability decreaes down the group explain this ?

calculate the ratio of change in the mass of the molecules of a gas to the initial mass,if its speed is reduced to half and the ratio of initial and final pressure is 3:4

Which is more stable allylic carbocation or methoxy methyl carbocation?

H alpha line of balmer series is 6500A(amstrong).The wavelength of H gamma series i

Why do chemical reaction involve absorption/evolution of heat

Write down properties of teflon.

Four consecutive charges +q,-q,+q and -q are placed in order on the 4 consecutive corners of a square of side L. What is the work done in interchanging the positions of any two neighbouring charges of the oppposite sign

1 g mixture of CaCO3 abd NaCl reacts completely with 100ml of N/10 HCl. The %of CACO3 in the mixture is??

What can be predicted from order of reaction ?

Calculate the value of change in entropy for a reaction if it is at equilibrium at 253 oC .The enthalpy change for the reaction is 52.6 kJ mol−1.

The total number of lone-pair of electrons in melamine is ___