46295 + Interview Questions in Chemistry

1.	The dimensional formula for molar thermal capacity is same as that of
Answer» The dimensional formula for molar thermal capacity is same as that of

Discussion

2.	The half life of a radioactive substance is 20 minutes. The approximate time interval (t2−t1) between the time t2, when 23 of it has decayed and time t1, when 1/3 of it has decayed is
Answer» The half life of a radioactive substance is $20 minutes$ . The approximate time interval $(t_{2} - t_{1})$ between the time $t_{2}$ , when $\frac{2}{3}$ of it has decayed and time $t_{1}$ , when $1 / 3$ of it has decayed is

Discussion

3.	43.how many moles of electrons weigh one kg?
Answer» 43.how many moles of electrons weigh one kg?

Discussion

4.	The reaction quotient (Q) for a reaction is given as Q=[NH3]2[N2][H2]3 . The reaction will proceed from left to right if ........
Answer» The reaction quotient (Q) for a reaction is given as $Q = \frac{[N H_{3}]^{2}}{[N_{2}] [H_{2}]^{3}}$ . The reaction will proceed from left to right if ........

Discussion

5.	The decomposition of formic acid on gold surface follows first order kinetics. If the rate constant at 300 K is 1.0×10−3 s−1 and the activation energy Ea=11.488 kJ mol−1, the rate constant at 200 K is ×10−5 s−1.(Round off to the nearest Integer).
Answer» The decomposition of formic acid on gold surface follows first order kinetics. If the rate constant at $300 K$ is $1.0 \times 10^{- 3} s^{- 1}$ and the activation energy $E_{a} = 11.488 {kJ mol}^{- 1}$ , the rate constant at $200 K$ is $\times 10^{- 5} s^{- 1}$ .(Round off to the nearest Integer).

Discussion

6.	What is poynting vector?
Answer» What is poynting vector?

Discussion

7.	Which of the following compounds does not react with NaHSO3?
Answer» Which of the following compounds does not react with $N a H S O_{3}$ ?

Discussion

8.	What is the molarity of H2SO4 solution that has a density of 1.84 g cc−1 and contains 98% by mass of H2SO4? (Given atomic mass of S = 32 amu)
Answer» What is the molarity of $H_{2} S O_{4}$ solution that has a density of $1.84 {g cc}^{- 1}$ and contains 98% by mass of $H_{2} S O_{4}$ ? (Given atomic mass of S = 32 amu)

Discussion

9.	Identify the odd term out and explainA. Gold, silver, copper, brassB.Hydrogen, hydrogen peroxide, carbon dioxide, water vapour.C.Milk, lemon juice, carbon, steel.D.water, mercury, bromine, petrol.E.sugar, slat, baking soda, blue vitrol.F.Hydrogen, sodium, potassium, carbon.
Answer» Identify the odd term out and explain A. Gold, silver, copper, brass B.Hydrogen, hydrogen peroxide, carbon dioxide, water vapour. C.Milk, lemon juice, carbon, steel. D.water, mercury, bromine, petrol. E.sugar, slat, baking soda, blue vitrol. F.Hydrogen, sodium, potassium, carbon.

Discussion

10.	Explain what is VSEPR theory.
Answer» Explain what is VSEPR theory.

Discussion

11.	Calculatethe pH of the following solutions:a)2 g of TlOH dissolved in water to give 2 litre of solution.b)0.3 g of Ca(OH)2dissolvedin water to give 500 mL of solution.c)0.3 g of NaOH dissolved in water to give 200 mL of solution.d)1mL of 13.6 M HCl is diluted with water to give 1 litre of solution.
Answer» Calculate the pH of the following solutions: a) 2 g of TlOH dissolved in water to give 2 litre of solution. b) 0.3 g of Ca(OH)₂dissolved in water to give 500 mL of solution. c) 0.3 g of NaOH dissolved in water to give 200 mL of solution. d) 1mL of 13.6 M HCl is diluted with water to give 1 litre of solution.

11.

Calculatethe pH of the following solutions:a)2 g of TlOH dissolved in water to give 2 litre of solution.b)0.3 g of Ca(OH)2dissolvedin water to give 500 mL of solution.c)0.3 g of NaOH dissolved in water to give 200 mL of solution.d)1mL of 13.6 M HCl is diluted with water to give 1 litre of solution.

Answer»

Calculate
the pH of the following solutions:

a)
2 g of TlOH dissolved in water to give 2 litre of solution.

b)
0.3 g of Ca(OH)₂dissolved
in water to give 500 mL of solution.

c)
0.3 g of NaOH dissolved in water to give 200 mL of solution.

d)
1mL of 13.6 M HCl is diluted with water to give 1 litre of solution.

Discussion

12.	Can you differentiate between the carbon and the phosphorus cycle?
Answer» Can you differentiate between the carbon and the phosphorus cycle?

Discussion

13.	45.What are clatherate compound ??
Answer» 45.What are clatherate compound ??

Discussion

14.	Polymerisation of ethene to poly - ethene is represented by the equation n(CH2=CH2)→(−CH2−CH2−)nGiven that average enthalpies of C = C and C - C bonds at 298 K are 590 and 331 kJ mol−1 respectively, predict the enthalpy change when 56g of ethene changes to polyethylene.
Answer» Polymerisation of ethene to poly - ethene is represented by the equation $n (C H_{2} = C H_{2}) \to (- C H_{2} - C H_{2} -)_{n}$ Given that average enthalpies of C = C and C - C bonds at 298 K are 590 and 331 kJ $m o l^{- 1}$ respectively, predict the enthalpy change when 56g of ethene changes to polyethylene.

Discussion

15.	convert the followuing 1 chloro propane to butanoic acid
Answer» convert the followuing 1 chloro propane to butanoic acid

Discussion

16.	30. Which of the following is correct about a solution showing negative deviation? (1) delta H mix > 0 (2) PA > p^° A XA (3) delta v mix > 0 (4) forms maximum boiling azeotrope
Answer» 30. Which of the following is correct about a solution showing negative deviation? (1) delta H mix > 0 (2) PA > p^° A XA (3) delta v mix > 0 (4) forms maximum boiling azeotrope

Discussion

17.	Stability order of the following compounds is:
Answer» Stability order of the following compounds is:

Discussion

18.	Aluminium (molecular weight = 27) crystallises in a cubic unit cell with edge length a = 100 pm, with dens d = 180 g/cubic cm , then type of unit cell is:How n = 4 shows its FCC ?
Answer» Aluminium (molecular weight = 27) crystallises in a cubic unit cell with edge length a = 100 pm, with dens d = 180 g/cubic cm , then type of unit cell is: How n = 4 shows its FCC ?

Discussion

19.	If the solubility of any gas in the liquid at 1 bar pressure is 0.05 mol/L. What will be it's solubility at 3 bar pressure, keeping the temperature constant?
Answer» If the solubility of any gas in the liquid at 1 bar pressure is 0.05 mol/L. What will be it's solubility at 3 bar pressure, keeping the temperature constant?

Discussion

20.	In which of the following silicates, cyclic structure is present
Answer» In which of the following silicates, cyclic structure is present

Discussion

21.	Write two main functions of carbohydrates in plants.
Answer» Write two main functions of carbohydrates in plants.

Discussion

22.	27. Draw all the possible conformers of n-Butane taking C2-C3 axis as rotational axis by Newman projection. Also draw the energy level diagrams.
Answer» 27. Draw all the possible conformers of n-Butane taking C2-C3 axis as rotational axis by Newman projection. Also draw the energy level diagrams.

Discussion

23.	The Ratio of Fe+3 and fe+2 in Fe0.9S1.0?
Answer» The Ratio of Fe+3 and fe+2 in Fe0.9S1.0?

Discussion

24.	Calcium imide on hydrolysis gives gas (B) which on oxidation by bleaching powder gives gas (C). Gas (C) on reaction with magnesium give compound (D) which on hydrolysis gives again gas (B). The compounds (B), (C) and (D) are respectively:
Answer» Calcium imide on hydrolysis gives gas (B) which on oxidation by bleaching powder gives gas (C). Gas (C) on reaction with magnesium give compound (D) which on hydrolysis gives again gas (B). The compounds (B), (C) and (D) are respectively:

Discussion

25.	for finding whether a molecule is polar or non polar , should we consider the geometry of the molecule or shape of the molecule ?
Answer» for finding whether a molecule is polar or non polar , should we consider the geometry of the molecule or shape of the molecule ?

Discussion

26.	Ksp of Mg(OH)2 is 4.0*10^-12. The number of moles of Mg2+ ions in one litre of its saturated solution in 0.1 M NaOH is
Answer» Ksp of Mg(OH)2 is 4.0*10^-12. The number of moles of Mg2+ ions in one litre of its saturated solution in 0.1 M NaOH is

Discussion

27.	Find the pH of a solution of CH_3COOH if its concentration is 1×10^{-2} mole per litre.Given that the degree of dissociation of CH_3COOH is 25%.
Answer» Find the pH of a solution of CH_3COOH if its concentration is 1×10^{-2} mole per litre.Given that the degree of dissociation of CH_3COOH is 25%.

Discussion

28.	Anline on acetylation followed by the treatement with nitrating mixture gives a product which on hydrolysis gives compound 'X'. 'X' is:
Answer» Anline on acetylation followed by the treatement with nitrating mixture gives a product which on hydrolysis gives compound 'X'. 'X' is:

Discussion

29.	17 200 g of ice at-20 C is mixed with 500 g of water at20C in an insulating vessel Final mass of water invessel is (specific heat of ice 0.5 cal gC-1)(1) 700 g(2) 600 g(3) 400 g(4) 200 g
Answer» 17 200 g of ice at-20 C is mixed with 500 g of water at 20C in an insulating vessel Final mass of water in vessel is (specific heat of ice 0.5 cal gC-1) (1) 700 g (2) 600 g (3) 400 g (4) 200 g

Discussion

30.	Which of the following metal oxides is antiferromagnetic in nature?
Answer» Which of the following metal oxides is antiferromagnetic in nature?

Discussion

31.	Which of the following acids has smallest dissociation cons†an t ? a) CH_3CH(NO_2)COOH b)O_2NCH_2CH_2COOH c)ClCH_2CH_2COOH d)NCCH_2CH_2COOH
Answer» Which of the following acids has smallest dissociation cons†an t ? a) CH_3CH(NO_2)COOH b)O_2NCH_2CH_2COOH c)ClCH_2CH_2COOH d)NCCH_2CH_2COOH

Discussion

32.	The solubility for the salts of the type AB3 is given by
Answer» The solubility for the salts of the type $A B_{3}$ is given by

Discussion

33.	When zeolite, which is hydrated sodium aluminimum silicate is treated with hard water, the sodium iions are exchanged with which of the following ion(s)? (a) H+ ions (b) Mg2+ ions (c) Ca2+ ions (d) SO2−4
Answer» When zeolite, which is hydrated sodium aluminimum silicate is treated with hard water, the sodium iions are exchanged with which of the following ion(s)? (a) $H^{+}$ ions (b) $M g^{2 +}$ ions (c) $C a^{2 +}$ ions (d) $S O_{4}^{2 -}$

Discussion

34.	What will be the heat of formation of ethane, if theheat of combustion of carbon is-X kJ, heat offormation of water is -y kJ and heat liberatedduring combustion of ethane is z kJ/mol?4.(1) (-2x- 2y z) kJ (2) (-2x-3y + z) ku3) (-2x+3y - z) kJ (4) (2x-3y -z) kJ
Answer» What will be the heat of formation of ethane, if theheat of combustion of carbon is-X kJ, heat offormation of water is -y kJ and heat liberatedduring combustion of ethane is z kJ/mol?4.(1) (-2x- 2y z) kJ (2) (-2x-3y + z) ku3) (-2x+3y - z) kJ (4) (2x-3y -z) kJ

Discussion

35.	why adsorption is exothermic process?
Answer» why adsorption is exothermic process?

Discussion

36.	What is Kohlrauch law . Give it's main application s ?
Answer» What is Kohlrauch law . Give it's main application s ?

Discussion

37.	what is heat engine and heat pump?
Answer» what is heat engine and heat pump?

Discussion

38.	nf3 has more dipole moment than nh3 why wrong?
Answer» nf3 has more dipole moment than nh3 why wrong?

Discussion

39.	Inorganic nutrients exist in the soil in the form of
Answer» Inorganic nutrients exist in the soil in the form of

Discussion

40.	28.What is the ratio of the de-broglie wave lengths for electrons accelerated throughy200 volts and 50 volts
Answer» 28.What is the ratio of the de-broglie wave lengths for electrons accelerated throughy200 volts and 50 volts

Discussion

41.	The relative order of esterification of alcohols is :-
Answer» The relative order of esterification of alcohols is :-

Discussion

42.	Fing the value of l for the last electon for the following:a.)Zn2+b.)Znc.)Crd).Cu
Answer» Fing the value of l for the last electon for the following: a.)Zn2+ b.)Zn c.)Cr d).Cu

Discussion

43.	How to calculate weight component
Answer» How to calculate weight component

Discussion

44.	An aqueous solution of a weak monobasic acid containing 0.1gm in 21.7gm of water freezes at 272.813K. If the value of Kf for water is 1.86K-kg/mol, what is the molecular mass of the monobasic acid
Answer» An aqueous solution of a weak monobasic acid containing 0.1gm in 21.7gm of water freezes at 272.813K. If the value of Kf for water is 1.86K-kg/mol, what is the molecular mass of the monobasic acid

Discussion

45.	31. Which of the following carbocation is highly unstable? 1) CH2= CH -- CH2+ 2) CH3 -- CH+ -- CH3 3) CH3 -- C+ =O 4) CH2+ -- CH =O
Answer» 31. Which of the following carbocation is highly unstable? 1) CH2= CH -- CH2+ 2) CH3 -- CH+ -- CH3 3) CH3 -- C+ =O 4) CH2+ -- CH =O

Discussion

46.	what is toluene
Answer» what is toluene

Discussion

47.	(a) Write the principle of electrolytic refining. (b) Why does copper obtained in the extraction from copper pyrites have a blistered appearance? (c) What is the role of depressants in the froth floatation process?
Answer» (a) Write the principle of electrolytic refining. (b) Why does copper obtained in the extraction from copper pyrites have a blistered appearance? (c) What is the role of depressants in the froth floatation process?

Discussion

48.	46. The value of ebullioscopic constant for water is 0.521 ℃/molal for 1000 g water. Find the value of ebullioscopic constant for 500 g water.
Answer» 46. The value of ebullioscopic constant for water is 0.521 ℃/molal for 1000 g water. Find the value of ebullioscopic constant for 500 g water.

Discussion

49.	Which of the following will have highest number of no bond resonating structures? CH2 = CH2 (CH3)2 – C = C(CH3)2 CH3 – CH = CH2
Answer» Which of the following will have highest number of no bond resonating structures? CH2 = CH2 (CH3)2 – C = C(CH3)2 CH3 – CH = CH2

Discussion

50.	is there any way to predict the product formed in pyrolysis?
Answer» is there any way to predict the product formed in pyrolysis?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The dimensional formula for molar thermal capacity is same as that of

The half life of a radioactive substance is 20 minutes. The approximate time interval (t2−t1) between the time t2, when 23 of it has decayed and time t1, when 1/3 of it has decayed is

43.how many moles of electrons weigh one kg?

The reaction quotient (Q) for a reaction is given as Q=[NH3]2[N2][H2]3 . The reaction will proceed from left to right if ........

The decomposition of formic acid on gold surface follows first order kinetics. If the rate constant at 300 K is 1.0×10−3 s−1 and the activation energy Ea=11.488 kJ mol−1, the rate constant at 200 K is ×10−5 s−1.(Round off to the nearest Integer).

What is poynting vector?

Which of the following compounds does not react with NaHSO3?

What is the molarity of H2SO4 solution that has a density of 1.84 g cc−1 and contains 98% by mass of H2SO4? (Given atomic mass of S = 32 amu)

Identify the odd term out and explainA. Gold, silver, copper, brassB.Hydrogen, hydrogen peroxide, carbon dioxide, water vapour.C.Milk, lemon juice, carbon, steel.D.water, mercury, bromine, petrol.E.sugar, slat, baking soda, blue vitrol.F.Hydrogen, sodium, potassium, carbon.

Explain what is VSEPR theory.

Calculatethe pH of the following solutions:a)2 g of TlOH dissolved in water to give 2 litre of solution.b)0.3 g of Ca(OH)2dissolvedin water to give 500 mL of solution.c)0.3 g of NaOH dissolved in water to give 200 mL of solution.d)1mL of 13.6 M HCl is diluted with water to give 1 litre of solution.

Can you differentiate between the carbon and the phosphorus cycle?

45.What are clatherate compound ??

Polymerisation of ethene to poly - ethene is represented by the equation n(CH2=CH2)→(−CH2−CH2−)nGiven that average enthalpies of C = C and C - C bonds at 298 K are 590 and 331 kJ mol−1 respectively, predict the enthalpy change when 56g of ethene changes to polyethylene.

convert the followuing 1 chloro propane to butanoic acid

30. Which of the following is correct about a solution showing negative deviation? (1) delta H mix > 0 (2) PA > p^° A XA (3) delta v mix > 0 (4) forms maximum boiling azeotrope

Stability order of the following compounds is:

Aluminium (molecular weight = 27) crystallises in a cubic unit cell with edge length a = 100 pm, with dens d = 180 g/cubic cm , then type of unit cell is:How n = 4 shows its FCC ?

If the solubility of any gas in the liquid at 1 bar pressure is 0.05 mol/L. What will be it's solubility at 3 bar pressure, keeping the temperature constant?

In which of the following silicates, cyclic structure is present

Write two main functions of carbohydrates in plants.

27. Draw all the possible conformers of n-Butane taking C2-C3 axis as rotational axis by Newman projection. Also draw the energy level diagrams.

The Ratio of Fe+3 and fe+2 in Fe0.9S1.0?

Calcium imide on hydrolysis gives gas (B) which on oxidation by bleaching powder gives gas (C). Gas (C) on reaction with magnesium give compound (D) which on hydrolysis gives again gas (B). The compounds (B), (C) and (D) are respectively:

for finding whether a molecule is polar or non polar , should we consider the geometry of the molecule or shape of the molecule ?

Ksp of Mg(OH)2 is 4.0*10^-12. The number of moles of Mg2+ ions in one litre of its saturated solution in 0.1 M NaOH is

Find the pH of a solution of CH_3COOH if its concentration is 1×10^{-2} mole per litre.Given that the degree of dissociation of CH_3COOH is 25%.

Anline on acetylation followed by the treatement with nitrating mixture gives a product which on hydrolysis gives compound 'X'. 'X' is:

17 200 g of ice at-20 C is mixed with 500 g of water at20C in an insulating vessel Final mass of water invessel is (specific heat of ice 0.5 cal gC-1)(1) 700 g(2) 600 g(3) 400 g(4) 200 g

Which of the following metal oxides is antiferromagnetic in nature?

Which of the following acids has smallest dissociation cons†an t ? a) CH_3CH(NO_2)COOH b)O_2NCH_2CH_2COOH c)ClCH_2CH_2COOH d)NCCH_2CH_2COOH

The solubility for the salts of the type AB3 is given by

When zeolite, which is hydrated sodium aluminimum silicate is treated with hard water, the sodium iions are exchanged with which of the following ion(s)? (a) H+ ions (b) Mg2+ ions (c) Ca2+ ions (d) SO2−4

What will be the heat of formation of ethane, if theheat of combustion of carbon is-X kJ, heat offormation of water is -y kJ and heat liberatedduring combustion of ethane is z kJ/mol?4.(1) (-2x- 2y z) kJ (2) (-2x-3y + z) ku3) (-2x+3y - z) kJ (4) (2x-3y -z) kJ

why adsorption is exothermic process?

What is Kohlrauch law . Give it's main application s ?

what is heat engine and heat pump?

nf3 has more dipole moment than nh3 why wrong?

Inorganic nutrients exist in the soil in the form of

28.What is the ratio of the de-broglie wave lengths for electrons accelerated throughy200 volts and 50 volts

The relative order of esterification of alcohols is :-

Fing the value of l for the last electon for the following:a.)Zn2+b.)Znc.)Crd).Cu

How to calculate weight component

An aqueous solution of a weak monobasic acid containing 0.1gm in 21.7gm of water freezes at 272.813K. If the value of Kf for water is 1.86K-kg/mol, what is the molecular mass of the monobasic acid

31. Which of the following carbocation is highly unstable? 1) CH2= CH -- CH2+ 2) CH3 -- CH+ -- CH3 3) CH3 -- C+ =O 4) CH2+ -- CH =O

what is toluene

(a) Write the principle of electrolytic refining. (b) Why does copper obtained in the extraction from copper pyrites have a blistered appearance? (c) What is the role of depressants in the froth floatation process?

46. The value of ebullioscopic constant for water is 0.521 ℃/molal for 1000 g water. Find the value of ebullioscopic constant for 500 g water.

Which of the following will have highest number of no bond resonating structures? CH2 = CH2 (CH3)2 – C = C(CH3)2 CH3 – CH = CH2

is there any way to predict the product formed in pyrolysis?