46295 + Interview Questions in Chemistry

1.	When 1019 electrons are added to a neutral metal plate through some process, the charge on it becomes:
Answer» When $10^{19}$ electrons are added to a neutral metal plate through some process, the charge on it becomes:

Discussion

2.	what are the number of atoms per unit cell and the number of nearest neighbours in a simple cubic structure
Answer» what are the number of atoms per unit cell and the number of nearest neighbours in a simple cubic structure

Discussion

3.	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

4.	q. Given that △ H ionisation of CH3COOH is 0.5 kcal/mol and △ H ionisation of NH_4OH is 1.5 kcal/mol. Te enthalpy of neutralisationh of NH_4OH and CH3COOH is (1) -10.5 kcal (2) - 11.7 kcal (3) -7.2 kcal (4) -13.7 kcal
Answer» q. Given that △ H ionisation of CH3COOH is 0.5 kcal/mol and △ H ionisation of NH_4OH is 1.5 kcal/mol. Te enthalpy of neutralisationh of NH_4OH and CH3COOH is (1) -10.5 kcal (2) - 11.7 kcal (3) -7.2 kcal (4) -13.7 kcal

Discussion

5.	Light of wavelength 2000 ∘A is incident on the cathode of a photocell. The current in the photocell is reduced to zero by stopping potential of 2 V. Find the threshold wavelength of the material of the cathode.Given:Planck's constamt (h)=6.63×10−34 J s, c=3×108 m s−1, e=1.6×10−19 C
Answer» Light of wavelength $2000 \circ A$ is incident on the cathode of a photocell. The current in the photocell is reduced to zero by stopping potential of $2 V$ . Find the threshold wavelength of the material of the cathode. $Given : Planck's constamt (h) = 6.63 \times 10^{- 34} {J s}, c = 3 \times 10^{8} {m s}^{- 1}, e = 1.6 \times 10^{- 19} C$

Discussion

6.	What is oxidation number and ionic charge? what is the difference between them?
Answer» What is oxidation number and ionic charge? what is the difference between them?

Discussion

7.	Three arrangements are shown for the complex [Co(en) (NH3)2Cl2]+. Pick up the wrong statement.
Answer» Three arrangements are shown for the complex [Co(en) $(N H_{3})_{2} C l_{2}]^{+}$ . Pick up the wrong statement.

7.

Three arrangements are shown for the complex [Co(en) (NH3)2Cl2]+. Pick up the wrong statement.

Answer»

Three arrangements are shown for the complex [Co(en) $(N H_{3})_{2} C l_{2}]^{+}$ . Pick up the wrong statement.

Discussion

8.	10ml of mixture of CO,CH4 and N2 exploded with excess of oxygen gave a contraction of 6.5ml.There was a further contraction of 7 ml when the residual gas was treated with KOH.What is the amount of CH4 in the original mixture?
Answer» 10ml of mixture of CO,CH₄ and N₂ exploded with excess of oxygen gave a contraction of 6.5ml.There was a further contraction of 7 ml when the residual gas was treated with KOH.What is the amount of CH₄ in the original mixture?

Discussion

9.	What is primary ,secondary and tertiary alcohols ?
Answer» What is primary ,secondary and tertiary alcohols ?

Discussion

10.	In the following sequence of reactions. What is D?
Answer» In the following sequence of reactions. What is D?

Discussion

11.	What is major product (X):-
Answer» What is major product (X):-

Discussion

12.	25. Explanation of Fischer projection
Answer» 25. Explanation of Fischer projection

Discussion

13.	what is grahams law
Answer» what is grahams law

Discussion

14.	What will be the normality of the solution obtained by mixing 100 mL of 0.2 M H2SO4 with 100 mL of 0.2 M NaOH ?
Answer» What will be the normality of the solution obtained by mixing $100 m L$ of $0.2 M H_{2} S O_{4}$ with $100 m L$ of $0.2 M N a O H$ ?

Discussion

15.	Three footballs are respectively filled with nitrogen, hydrogen and helium. If the leaking of the gas occurs with time from the filling hole, then the ratio of the rate of leaking of gases (rN2:rH2:rHe) from three footballs (in equal time interval) is:
Answer» Three footballs are respectively filled with nitrogen, hydrogen and helium. If the leaking of the gas occurs with time from the filling hole, then the ratio of the rate of leaking of gases $(r_{N_{2}} : r_{H_{2}} : r_{H e})$ from three footballs (in equal time interval) is:

Discussion

16.	24. the weight of 350 ml of diatomic gas at zero degree Celsius and 2 ATM pressure is one game the weight of one atom is ( Nissan the avocado no.)
Answer» 24. the weight of 350 ml of diatomic gas at zero degree Celsius and 2 ATM pressure is one game the weight of one atom is ( Nissan the avocado no.)

Discussion

17.	Which of the following configuration will have least electron affinity -
Answer» Which of the following configuration will have least electron affinity -

Discussion

18.	Which pair gives Cl2 at room temperature ?
Answer» Which pair gives Cl₂at room temperature ?

Discussion

19.	34.For a sample of perfect gas when its pressure is changed isothermally from pi to pf the entropy change is given by?
Answer» 34.For a sample of perfect gas when its pressure is changed isothermally from pi to pf the entropy change is given by?

Discussion

20.	With which of the following reagent diborane does not produce hydrogen.
Answer» With which of the following reagent diborane does not produce hydrogen.

Discussion

21.	Among the following oxides, the one which is most basic is:
Answer» Among the following oxides, the one which is most basic is:

Discussion

22.	Assertion: In an isolated system,the entropy increases.Reason: the processes in an isolated system are adiabatic.
Answer» Assertion: In an isolated system,the entropy increases.Reason: the processes in an isolated system are adiabatic.

Discussion

23.	35. Divide 120 into two parts such that 2/3 of one part is equal to 2/5 of the other.
Answer» 35. Divide 120 into two parts such that 2/3 of one part is equal to 2/5 of the other.

Discussion

24.	which of the following is readily soluble in water? (1) chloro benzene (2)1-chloro,2-ene cyclohexane (3)1-chloro cyclo hexane (4)1-ene cyclo hexa
Answer» which of the following is readily soluble in water? (1) chloro benzene (2)1-chloro,2-ene cyclohexane (3)1-chloro cyclo hexane (4)1-ene cyclo hexa

Discussion

25.	In which ever cases friedel crafts alkylation/acylation will not work
Answer» In which ever cases friedel crafts alkylation/acylation will not work

Discussion

26.	what is basic bessemer process? give associated reactions in details.
Answer» what is basic bessemer process? give associated reactions in details.

Discussion

27.	Among the electrolytesNa2SO4, CaCl2, Al2(SO4)3 and NH4Cl the most effective coagulating agent for Sb2S3 sol is :
Answer» Among the electrolytes $N a_{2} S O_{4}, C a C l_{2}, A l_{2} (S O_{4})_{3}$ and $N H_{4} C l$ the most effective coagulating agent for $S b_{2} S_{3}$ sol is :

Discussion

28.	12.A cubic solid is made of two different atoms 'P' and 'Q'. Atoms P are present at the corners of the cube and Q are present at the alternate face centers.What is the formula of the compound ?
Answer» 12.A cubic solid is made of two different atoms 'P' and 'Q'. Atoms P are present at the corners of the cube and Q are present at the alternate face centers.What is the formula of the compound ?

Discussion

29.	A gaseous mixture contains nitrogen and oxygen in the ratio of4 :1 by weight. Therefore, the ratio of their number ofmolecules is:
Answer» A gaseous mixture contains nitrogen and oxygen in the ratio of4 :1 by weight. Therefore, the ratio of their number ofmolecules is:

Discussion

30.	convert benzoyl chloride to benzonitrile
Answer» convert benzoyl chloride to benzonitrile

Discussion

31.	12.Among C2H5CH2Cl and C6H5CHClC6H5 which will hydrolysis by aq.KOH faster
Answer» 12.Among C2H5CH2Cl and C6H5CHClC6H5 which will hydrolysis by aq.KOH faster

Discussion

32.	Q.1. Does 'double bond' is only present on equitoral position2. Does 'lone pair' is only present on equitoral positionin hybridisation?
Answer» Q. 1. Does 'double bond' is only present on equitoral position 2. Does 'lone pair' is only present on equitoral position in hybridisation?

Discussion

33.	Two containers of equal volume contain the same gas at same pressure and at temperature Tand 2T. On joining the vessels, the common temperature is nT. The value of n is
Answer» Two containers of equal volume contain the same gas at same pressure and at temperature Tand 2T. On joining the vessels, the common temperature is nT. The value of n is

Discussion

34.	Question 18 The value of Henry's constant, KH is............ (a) greater for gases with higher solubility (b) greater for gases with lower solubility (c) constant for all gases (d) not related to the solubility of gases
Answer» Question 18 The value of Henry's constant, $K_{H} i s . . . . . . . . . . . .$ (a) greater for gases with higher solubility (b) greater for gases with lower solubility (c) constant for all gases (d) not related to the solubility of gases

Discussion

35.	Celluloid is
Answer» Celluloid is

Discussion

36.	What is the wavelength of radiation release if atom drops from first excited state in balmer series to ground state in balmer series ?
Answer» What is the wavelength of radiation release if atom drops from first excited state in balmer series to ground state in balmer series ?

Discussion

37.	FIND OUT THE RATIO OF NUMBER OF ATOMS IN 1g NH3 and 1g N2
Answer» FIND OUT THE RATIO OF NUMBER OF ATOMS IN 1g NH3 and 1g N2

Discussion

38.	34. What will be the number of products if excess of C(n)H(2n+1) is reacted with Cl2 in the presence of sunlight?
Answer» 34. What will be the number of products if excess of C(n)H(2n+1) is reacted with Cl2 in the presence of sunlight?

Discussion

39.	What is the hydrogen ion concentration of a solution whose pH is 3.70?
Answer» What is the hydrogen ion concentration of a solution whose pH is 3.70?

Discussion

40.	According to IUPAC nomenclature rules, the correct name of the compound is:
Answer» According to IUPAC nomenclature rules, the correct name of the compound is:

Discussion

41.	What is atomic radius and covalent radius?
Answer» What is atomic radius and covalent radius?

Discussion

42.	71 Cr2+acts as reducing agent and Mn3+ acts as oxidizing agent though the electronic configuration of 3d subshell is 3d4 in both cases .Why?
Answer» 71 Cr2+acts as reducing agent and Mn3+ acts as oxidizing agent though the electronic configuration of 3d subshell is 3d4 in both cases .Why?

Discussion

43.	The electronic configuration of a dispositive metal M2+ is, 2, 8, 14 and its atomic weight is 56 a.m.u. The number of neutrons in its nuclei would be
Answer» The electronic configuration of a dispositive metal $M^{2 +}$ is, 2, 8, 14 and its atomic weight is 56 a.m.u. The number of neutrons in its nuclei would be

Discussion

44.	24.What is minimum distance between two tetrahedral void and two octahedral void in all structure ?
Answer» 24.What is minimum distance between two tetrahedral void and two octahedral void in all structure ?

Discussion

45.	What are the laws of thermodynamics? (With explanation and proves)
Answer» What are the laws of thermodynamics? (With explanation and proves)

Discussion

46.	6. What is the difference between n factor, valence and oxidation number? 1. 6 2. 3 3. 2 4. 1
Answer» 6. What is the difference between n factor, valence and oxidation number? 1. 6 2. 3 3. 2 4. 1

Discussion

47.	Which of the following easily reacts with water producing hydrogen ?
Answer» Which of the following easily reacts with water producing hydrogen ?

Discussion

48.	The gas phase decomposition of dimethyl ether follows first order kinetics.CH3OCH3(g)→CH4(g)+H2(g)+CO(g)The reaction is carried out in a constant volume container at 500∘C and has a half life of 30.1 minutes. Initially, only dimethyl ether is present at a presure of 0.396 atm. What is the total pressure after 12 minutes? Assume ideal gas behavior.(Given: 100.12=1.32)
Answer» The gas phase decomposition of dimethyl ether follows first order kinetics. $C H_{3} O C H_{3} (g) \to C H_{4} (g) + H_{2} (g) + C O (g)$ The reaction is carried out in a constant volume container at $500^{\circ} C$ and has a half life of $30.1$ minutes. Initially, only dimethyl ether is present at a presure of $0.396 atm$ . What is the total pressure after $12$ minutes? Assume ideal gas behavior. (Given: $10^{0.12} = 1.32$ )

Discussion

49.	One mole of oxygen gas at STP is equal to........... (a) 6.022×1023 molecules of oxygen (b) 6.022×1023 atoms of oxygen (c) 16 g of oxygen (d) 32 g of oxygen
Answer» One mole of oxygen gas at STP is equal to........... (a) $6.022 \times 10^{23}$ molecules of oxygen (b) $6.022 \times 10^{23}$ atoms of oxygen (c) 16 g of oxygen (d) 32 g of oxygen

49.

One mole of oxygen gas at STP is equal to........... (a) 6.022×1023 molecules of oxygen (b) 6.022×1023 atoms of oxygen (c) 16 g of oxygen (d) 32 g of oxygen

Answer»

One mole of oxygen gas at STP is equal to...........

(a) $6.022 \times 10^{23}$ molecules of oxygen

(b) $6.022 \times 10^{23}$ atoms of oxygen

(c) 16 g of oxygen

(d) 32 g of oxygen

Discussion

50.	Calculate the distance between the planes of ions if the smallest angle of reflection is x-ray diffraction is 5.970 and the wavelength of incident ray is 58.6 pm? (sin5.970 = 0.104)
Answer» Calculate the distance between the planes of ions if the smallest angle of reflection is x-ray diffraction is ${5.97}^{0}$ and the wavelength of incident ray is 58.6 pm? $(s i n {5.97}^{0}$ = 0.104)

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

When 1019 electrons are added to a neutral metal plate through some process, the charge on it becomes:

what are the number of atoms per unit cell and the number of nearest neighbours in a simple cubic structure

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

q. Given that △ H ionisation of CH3COOH is 0.5 kcal/mol and △ H ionisation of NH_4OH is 1.5 kcal/mol. Te enthalpy of neutralisationh of NH_4OH and CH3COOH is (1) -10.5 kcal (2) - 11.7 kcal (3) -7.2 kcal (4) -13.7 kcal

Light of wavelength 2000 ∘A is incident on the cathode of a photocell. The current in the photocell is reduced to zero by stopping potential of 2 V. Find the threshold wavelength of the material of the cathode.Given:Planck's constamt (h)=6.63×10−34 J s, c=3×108 m s−1, e=1.6×10−19 C

What is oxidation number and ionic charge? what is the difference between them?

Three arrangements are shown for the complex [Co(en) (NH3)2Cl2]+. Pick up the wrong statement.

10ml of mixture of CO,CH​​​​​4 and N​​​​​​2 exploded with excess of oxygen gave a contraction of 6.5ml.There was a further contraction of 7 ml when the residual gas was treated with KOH.What is the amount of CH​​​​​4 in the original mixture?

What is primary ,secondary and tertiary alcohols ?

In the following sequence of reactions. What is D?

What is major product (X):-

25. Explanation of Fischer projection

what is grahams law

What will be the normality of the solution obtained by mixing 100 mL of 0.2 M H2SO4​ with 100 mL of 0.2 M NaOH ?

Three footballs are respectively filled with nitrogen, hydrogen and helium. If the leaking of the gas occurs with time from the filling hole, then the ratio of the rate of leaking of gases (rN2:rH2:rHe) from three footballs (in equal time interval) is:

24. the weight of 350 ml of diatomic gas at zero degree Celsius and 2 ATM pressure is one game the weight of one atom is ( Nissan the avocado no.)

Which of the following configuration will have least electron affinity -

Which pair gives Cl2 at room temperature ?

34.For a sample of perfect gas when its pressure is changed isothermally from pi to pf the entropy change is given by?

With which of the following reagent diborane does not produce hydrogen.

Among the following oxides, the one which is most basic is:

Assertion: In an isolated system,the entropy increases.Reason: the processes in an isolated system are adiabatic.

35. Divide 120 into two parts such that 2/3 of one part is equal to 2/5 of the other.

which of the following is readily soluble in water? (1) chloro benzene (2)1-chloro,2-ene cyclohexane (3)1-chloro cyclo hexane (4)1-ene cyclo hexa

In which ever cases friedel crafts alkylation/acylation will not work

what is basic bessemer process? give associated reactions in details.

Among the electrolytesNa2SO4, CaCl2, Al2(SO4)3 and NH4Cl the most effective coagulating agent for Sb2S3 sol is :

12.A cubic solid is made of two different atoms 'P' and 'Q'. Atoms P are present at the corners of the cube and Q are present at the alternate face centers.What is the formula of the compound ?

A gaseous mixture contains nitrogen and oxygen in the ratio of4 :1 by weight. Therefore, the ratio of their number ofmolecules is:

convert benzoyl chloride to benzonitrile

12.Among C2H5CH2Cl and C6H5CHClC6H5 which will hydrolysis by aq.KOH faster

Q.1. Does 'double bond' is only present on equitoral position2. Does 'lone pair' is only present on equitoral positionin hybridisation?

Two containers of equal volume contain the same gas at same pressure and at temperature Tand 2T. On joining the vessels, the common temperature is nT. The value of n is

Question 18 The value of Henry's constant, KH is............ (a) greater for gases with higher solubility (b) greater for gases with lower solubility (c) constant for all gases (d) not related to the solubility of gases

Celluloid is

What is the wavelength of radiation release if atom drops from first excited state in balmer series to ground state in balmer series ?

FIND OUT THE RATIO OF NUMBER OF ATOMS IN 1g NH3 and 1g N2

34. What will be the number of products if excess of C(n)H(2n+1) is reacted with Cl2 in the presence of sunlight?

What is the hydrogen ion concentration of a solution whose pH is 3.70?

According to IUPAC nomenclature rules, the correct name of the compound is:

What is atomic radius and covalent radius?

71 Cr2+acts as reducing agent and Mn3+ acts as oxidizing agent though the electronic configuration of 3d subshell is 3d4 in both cases .Why?

The electronic configuration of a dispositive metal M2+ is, 2, 8, 14 and its atomic weight is 56 a.m.u. The number of neutrons in its nuclei would be

24.What is minimum distance between two tetrahedral void and two octahedral void in all structure ?

What are the laws of thermodynamics? (With explanation and proves)

6. What is the difference between n factor, valence and oxidation number? 1. 6 2. 3 3. 2 4. 1

Which of the following easily reacts with water producing hydrogen ?

One mole of oxygen gas at STP is equal to........... (a) 6.022×1023 molecules of oxygen (b) 6.022×1023 atoms of oxygen (c) 16 g of oxygen (d) 32 g of oxygen

Calculate the distance between the planes of ions if the smallest angle of reflection is x-ray diffraction is 5.970 and the wavelength of incident ray is 58.6 pm? (sin5.970 = 0.104)

10ml of mixture of CO,CH4 and N2 exploded with excess of oxygen gave a contraction of 6.5ml.There was a further contraction of 7 ml when the residual gas was treated with KOH.What is the amount of CH4 in the original mixture?

What will be the normality of the solution obtained by mixing 100 mL of 0.2 M H2SO4 with 100 mL of 0.2 M NaOH ?