15280 + Interview Questions in Chemistry

1.	12. Provide the order of melting point of Carbon family?
Answer» 12. Provide the order of melting point of Carbon family?

Discussion

2.	In a structure, oxide ions are cubical closest packed where as 1/8 of tetrahedral voids are occupied by A+2 cation and 1/2 of octahedral voids are occupied by B+3 cations. The formula for this compound is
Answer» In a structure, oxide ions are cubical closest packed where as 1/8 of tetrahedral voids are occupied by A+2 cation and 1/2 of octahedral voids are occupied by B+3 cations. The formula for this compound is

Discussion

3.	The melting point of alkanes ___ with ___ in molecular weight.
Answer» The melting point of alkanes ___ with ___ in molecular weight.

Discussion

4.	What are isoelectronic species?
Answer» What are isoelectronic species?

Discussion

5.	Write the differences between with examples:(a) a strong electrolyte and a weak electrolyte.(b) electrolytic dissociation and ionization.
Answer» Write the differences between with examples: (a) a strong electrolyte and a weak electrolyte. (b) electrolytic dissociation and ionization.

Discussion

6.	Cumene on treatment with KMnO4 gives :-
Answer» Cumene on treatment with $K M n O_{4}$ gives :-

Discussion

7.	Ammonia was initially called ___.
Answer» Ammonia was initially called ___.

Discussion

8.	why SF4 is electron deficient species ,it should have ten electrons ? why it acts as lewis acids
Answer» why SF4 is electron deficient species ,it should have ten electrons ? why it acts as lewis acids

Discussion

9.	Which statement describes the fact that pesticides move up the food chain?
Answer» Which statement describes the fact that pesticides move up the food chain?

Discussion

10.	(c) Draw the structural formulae of the two isomers of Butane. Give the correct lUPAC name of each isomer.
Answer» (c) Draw the structural formulae of the two isomers of Butane. Give the correct lUPAC name of each isomer.

Discussion

11.	IfF copper is kept exposed to damp air for a considerable time, it gets a green coating on its surface. This is due to the formation of: (a) hydrated copper sulphate (b) copper oxide (c basic copper carbonate (d) copper nitrate
Answer» IfF copper is kept exposed to damp air for a considerable time, it gets a green coating on its surface. This is due to the formation of: (a) hydrated copper sulphate (b) copper oxide (c basic copper carbonate (d) copper nitrate

Discussion

12.	Cl+ Lewis dot structure
Answer» Cl+ Lewis dot structure

Discussion

13.	(a) Write the structures of the main products of the following reactions :(b) Give a simple chemical test to distinguish between Aniline and N, N-dimethylaniline. (c) Arrange the following in the increasing order of their pKb values :C6H5NH2, C2H5NH2, C6H5NHCH3
Answer» (a) Write the structures of the main products of the following reactions : (b) Give a simple chemical test to distinguish between Aniline and N, N-dimethylaniline. (c) Arrange the following in the increasing order of their $p K_{b}$ values : $C_{6} H_{5} N H_{2}, C_{2} H_{5} N H_{2}, C_{6} H_{5} N H C H_{3}$

Discussion

14.	Prepare Trial Balance from the following information: Capital Rs.50,000; Bank Loan Rs.20,000; Trade payables Rs.18,000; Rent outstanding Rs.4,000. Capital reserve Rs.5,000; Commission received Rs.3,000; Bad debts Rs.5,000. Plant & Machinery Rs.60,000; Goodwill Rs.16,000; Carriage inwards Rs.2,500; Carriage outwards Rs.1,500; Trade Receivables Rs. 10,000; Profit and Loss (Dr.) Rs.5,000.
Answer» Prepare Trial Balance from the following information: Capital Rs.50,000; Bank Loan Rs.20,000; Trade payables Rs.18,000; Rent outstanding Rs.4,000. Capital reserve Rs.5,000; Commission received Rs.3,000; Bad debts Rs.5,000. Plant & Machinery Rs.60,000; Goodwill Rs.16,000; Carriage inwards Rs.2,500; Carriage outwards Rs.1,500; Trade Receivables Rs. 10,000; Profit and Loss (Dr.) Rs.5,000.

14.

Prepare Trial Balance from the following information: Capital Rs.50,000; Bank Loan Rs.20,000; Trade payables Rs.18,000; Rent outstanding Rs.4,000. Capital reserve Rs.5,000; Commission received Rs.3,000; Bad debts Rs.5,000. Plant & Machinery Rs.60,000; Goodwill Rs.16,000; Carriage inwards Rs.2,500; Carriage outwards Rs.1,500; Trade Receivables Rs. 10,000; Profit and Loss (Dr.) Rs.5,000.

Answer»

Prepare Trial Balance from the following information:

Capital Rs.50,000; Bank Loan Rs.20,000; Trade payables Rs.18,000; Rent outstanding Rs.4,000. Capital reserve Rs.5,000; Commission received Rs.3,000; Bad debts Rs.5,000. Plant & Machinery Rs.60,000; Goodwill Rs.16,000; Carriage inwards Rs.2,500; Carriage outwards Rs.1,500; Trade Receivables Rs. 10,000; Profit and Loss (Dr.) Rs.5,000.

Discussion

15.	Which of the following lines in the periodic table separates metals from non-metals?
Answer» Which of the following lines in the periodic table separates metals from non-metals?

Discussion

16.	What is a longitudal wave?How should we find it's wavelength?
Answer» What is a longitudal wave?How should we find it's wavelength?

Discussion

17.	calculate the total pressure in a 10 litre cylinder which contains 0.4g He , 1.6g of oxygen and 1.4g of nitrogen at 27'C . also calculate the partial pressure of He gas in the cylinder . assume ideal behaviour for gases .
Answer» calculate the total pressure in a 10 litre cylinder which contains 0.4g He , 1.6g of oxygen and 1.4g of nitrogen at 27'C . also calculate the partial pressure of He gas in the cylinder . assume ideal behaviour for gases .

Discussion

18.	25. Which of the following is the main organic product obtained by tge reaction of 2,2,2-trichloro ethanal with calcium hydroxide ? A chloroform B methylene chloride C CCl4 D trichloro ethane
Answer» 25. Which of the following is the main organic product obtained by tge reaction of 2,2,2-trichloro ethanal with calcium hydroxide ? A chloroform B methylene chloride C CCl4 D trichloro ethane

Discussion

19.	If 3 moles of oxygen combines with aluminium the weight of aluminium used in the reaction
Answer» If 3 moles of oxygen combines with aluminium the weight of aluminium used in the reaction

Discussion

20.	$ \frac{\text { Sadaline }}{4} $$ A, A $ is
Answer» $ \frac{\text { Sadaline }}{4} $ $ A, A $ is

Discussion

21.	Fill in the following blanks with suitable words : (a) The addition of oxygen to a substance is called ........... whereas removal of oxygen is called ....... (b) The addition of hydrogen to a substance is called .......... whereas removal of hydrogen is called ......... (c) Anit-oxidants are often added to fat containing foods to prevent .......... due to oxidation.
Answer» Fill in the following blanks with suitable words : (a) The addition of oxygen to a substance is called ........... whereas removal of oxygen is called ....... (b) The addition of hydrogen to a substance is called .......... whereas removal of hydrogen is called ......... (c) Anit-oxidants are often added to fat containing foods to prevent .......... due to oxidation.

21.

Fill in the following blanks with suitable words : (a) The addition of oxygen to a substance is called ........... whereas removal of oxygen is called ....... (b) The addition of hydrogen to a substance is called .......... whereas removal of hydrogen is called ......... (c) Anit-oxidants are often added to fat containing foods to prevent .......... due to oxidation.

Answer»

Fill in the following blanks with suitable words :

(a) The addition of oxygen to a substance is called ........... whereas removal of oxygen is called .......

(b) The addition of hydrogen to a substance is called .......... whereas removal of hydrogen is called .........

(c) Anit-oxidants are often added to fat containing foods to prevent .......... due to oxidation.

Discussion

22.	22. The compound which contains both ionic and covalent bonds 1. C2H4 2. CaCl2 3.CaC2 4.C2H2
Answer» 22. The compound which contains both ionic and covalent bonds 1. C2H4 2. CaCl2 3.CaC2 4.C2H2

Discussion

23.	In the reactionHCl + NaOH --> NaCl + H2O + x calH2SO4 + 2NaOH --> Na2SO4 + 2H2O + y cal(1) x = y(2) x = 2y(3) x = y/2(4) x2 = y
Answer» In the reaction HCl + NaOH --> NaCl + H2O + x cal H2SO4 + 2NaOH --> Na2SO4 + 2H2O + y cal (1) x = y (2) x = 2y (3) x = y/2 (4) x2 = y

Discussion

24.	3, Ammonium carbamate dissociates asNH2COONH4(s)-2NH3(g) + CO2(g)In a closed vessel containing ammonium carbamatein equilibrium, ammonia is added such that thepartial pressure of NH3 now equals to the originaltotal pressure. The ratio of total pressure now to theoriginal pressure is31(2) 2727(1) 3145P
Answer» 3, Ammonium carbamate dissociates asNH2COONH4(s)-2NH3(g) + CO2(g)In a closed vessel containing ammonium carbamatein equilibrium, ammonia is added such that thepartial pressure of NH3 now equals to the originaltotal pressure. The ratio of total pressure now to theoriginal pressure is31(2) 2727(1) 3145P

Discussion

25.	The ratio of Fe3+ and Fe2+ in Fe0.9S1.0 is ?
Answer» The ratio of Fe3+ and Fe2+ in Fe0.9S1.0 is ?

Discussion

26.	What are functional isomers?
Answer» What are functional isomers?

Discussion

27.	Why the temperature of the mixture of HCl rises when aluminium is added to it.
Answer» Why the temperature of the mixture of HCl rises when aluminium is added to it.

Discussion

28.	Why intermolecular force of attraction is higher in ionic compound than covelent compound??
Answer» Why intermolecular force of attraction is higher in ionic compound than covelent compound??

Discussion

29.	a ring consisting of two parts ADB and ACB of same conductivity K carries an amount of heat H.the ADB part is now replaced with another metal keeping the tempertaures T1 and T2 constant.the heat carried increases to 2H.what should be the conductivity of the new ADB part?(given ACB/ADB=3)
Answer» a ring consisting of two parts ADB and ACB of same conductivity K carries an amount of heat H.the ADB part is now replaced with another metal keeping the tempertaures T1 and T2 constant.the heat carried increases to 2H.what should be the conductivity of the new ADB part?(given ACB/ADB=3)

Discussion

30.	Aluminum chloride exists as a dimer Al2Cl6 in solid state as well as in solution of non-polar solvents such as C6H6. When dissolved in acidified aqueous solution, it gives:
Answer» Aluminum chloride exists as a dimer $A l_{2} C l_{6}$ in solid state as well as in solution of non-polar solvents such as $C_{6} H_{6}$ . When dissolved in acidified aqueous solution, it gives:

Discussion

31.	Write down the names of compounds represented by the following formulae: 1. Al2 (SO4)32. CaCl23. K2SO44. KNO35. CaCO36. NaNO3 7. ZnCO38. Na3PO4
Answer» Write down the names of compounds represented by the following formulae: 1. Al₂(SO₄)₃ 2. CaCl₂ 3. K₂SO₄ 4. KNO₃ 5. CaCO₃ 6. NaNO₃ 7. ZnCO₃ 8. Na₃PO₄

31.

Write down the names of compounds represented by the following formulae: 1. Al2 (SO4)32. CaCl23. K2SO44. KNO35. CaCO36. NaNO3 7. ZnCO38. Na3PO4

Answer»

Write down the names of compounds represented by the following formulae:

1. Al₂(SO₄)₃

2. CaCl₂

3. K₂SO₄

4. KNO₃

5. CaCO₃

6. NaNO₃

7. ZnCO₃

8. Na₃PO₄

Discussion

32.	1. The third nearest neighbours of body centered sodium ion in NaCI structure is(1) 6 CI(3) 12 CI(2) 8 CI-(4) 10 CI-
Answer» 1. The third nearest neighbours of body centered sodium ion in NaCI structure is(1) 6 CI(3) 12 CI(2) 8 CI-(4) 10 CI-

Discussion

33.	A train with stoppages,covers a distance at 60 Km/hr and without stoppages at 90 Km/hr. The train stops for ______ min/hr
Answer» A train with stoppages,covers a distance at 60 Km/hr and without stoppages at 90 Km/hr. The train stops for ______ min/hr

Discussion

34.	The GAM of hydrogen is 1 g. How many grams of hydrogen gas contains avogadro number of molecules?
Answer» The GAM of hydrogen is 1 g. How many grams of hydrogen gas contains avogadro number of molecules?

Discussion

35.	A cylinder can withstand a pressure of 15 atm. The pressure gauge of the cylinder indicates 12 atm at 27∘C. Above the cylinder will explode.
Answer» A cylinder can withstand a pressure of 15 atm. The pressure gauge of the cylinder indicates 12 atm at 27∘C. Above the cylinder will explode.

Discussion

36.	Write balanced equation to show the reaction between the sulphur and hot concentrated nitric acid.
Answer» Write balanced equation to show the reaction between the sulphur and hot concentrated nitric acid.

Discussion

37.	which one has minimum effective nuclear charge?LiNaKCsshould it not be 4th one?
Answer» which one has minimum effective nuclear charge? Li Na K Cs should it not be 4th one?

Discussion

38.	Determine the empirical formula of an oxide of iron, which has 69.9% iron and 30.1% dioxygen by mass.
Answer» Determine the empirical formula of an oxide of iron, which has $69.9 %$ iron and $30.1 %$ dioxygen by mass.

Discussion

39.	Which of the given reactions supports or suggests that ethanol is acidic in nature?
Answer» Which of the given reactions supports or suggests that ethanol is acidic in nature?

Discussion

40.	What do you observe when(i) Excess ammonia is mixed with chlorine.(ii) Ammonia in excess is mixed with chlorine.(iii) Filter paper dipped in colourless phenolphthalein is introduced into ammonia.(iv) Ammonia is passed over heated lead oxide.(v) Ammonia solution is added to ferric chloride solution.(vi) Ammonia solution is added drop by drop and then in excess to aqueous copper sulphate solution.(vii) Ammonia comes in contact with the eyes of a person.
Answer» What do you observe when (i) Excess ammonia is mixed with chlorine. (ii) Ammonia in excess is mixed with chlorine. (iii) Filter paper dipped in colourless phenolphthalein is introduced into ammonia. (iv) Ammonia is passed over heated lead oxide. (v) Ammonia solution is added to ferric chloride solution. (vi) Ammonia solution is added drop by drop and then in excess to aqueous copper sulphate solution. (vii) Ammonia comes in contact with the eyes of a person.

Discussion

41.	Convert 1920 seconds into radion
Answer» Convert 1920 seconds into radion

Discussion

42.	What is the ratio of emperical formula mass to molecular formula mass of benzene
Answer» What is the ratio of emperical formula mass to molecular formula mass of benzene

Discussion

43.	(a) Al3+, Cu2+, Na+, Zn2+ ions are present in an aqueous solution, such that the concentration of ions is same. write the order of discharge of ions.(b) Amongst the OH− ions and Br− ions which are likely to discharge first?
Answer» (a) Al³⁺, Cu²⁺, Na⁺, Zn²⁺ ions are present in an aqueous solution, such that the concentration of ions is same. write the order of discharge of ions. (b) Amongst the OH⁻ ions and Br⁻ ions which are likely to discharge first?

Discussion

44.	(a) Explain the process of preparation of soap in the laboratory. (b) Why is common salt (sodium chloride) added during the preparation of soap? (c) Why is soap not suitable for washing clothes when the water is hard?
Answer» (a) Explain the process of preparation of soap in the laboratory. (b) Why is common salt (sodium chloride) added during the preparation of soap? (c) Why is soap not suitable for washing clothes when the water is hard?

Discussion

45.	A student was asked to carry out a chemical reaction by placing four different metal strips in CuSO4 solution for a considerable time, one by one. Which of the following metal strip will turn the blue CuSO4 solution to a colourless solution in due course of time?(1) Fe(2) Au(3) Mg(4) Ag
Answer» A student was asked to carry out a chemical reaction by placing four different metal strips in CuSO₄solution for a considerable time, one by one. Which of the following metal strip will turn the blue CuSO₄ solution to a colourless solution in due course of time? (1) Fe (2) Au (3) Mg (4) Ag

Discussion

46.	Though zinc is more reactive than iron, yet it prevents rusting. Justify.
Answer» Though zinc is more reactive than iron, yet it prevents rusting. Justify.

Discussion

47.	Find the mass of lead formed by the reduction of 342.5 g of red lead(Pb3O4) in a current of hydrogen.
Answer» Find the mass of lead formed by the reduction of 342.5 g of red lead( $P b_{3} O_{4}$ ) in a current of hydrogen.

Discussion

48.	In the conversion of compound X into compound Z, it was found that the reaction proceeded by way of Y, which could be isolated. The following steps were involved. X → Y; endothermic process Y → Z; exothermic process Which is the reaction profile of this conversion from X to Z?
Answer» In the conversion of compound X into compound Z, it was found that the reaction proceeded by way of Y, which could be isolated. The following steps were involved. X → Y; endothermic process Y → Z; exothermic process Which is the reaction profile of this conversion from X to Z?

Discussion

49.	26.Write IUPAC name of C2H5COC4H9 and C3H7COOC2H5 and (C2H5)3C-CH2-CH2-C(C2H5)3
Answer» 26.Write IUPAC name of C2H5COC4H9 and C3H7COOC2H5 and (C2H5)3C-CH2-CH2-C(C2H5)3

Discussion

50.	5. An oxide of a metal M has 47% by mass of oxygen. Metal M has atomic mass of 24. The empirical formula of the oxide is?
Answer» 5. An oxide of a metal M has 47% by mass of oxygen. Metal M has atomic mass of 24. The empirical formula of the oxide is?

Discussion

20.	\( \frac{\text { Sadaline }}{4} \)\( A, A \) is
Answer» \( \frac{\text { Sadaline }}{4} \) \( A, A \) is

Explore topic-wise InterviewSolutions in Current Affairs.

12. Provide the order of melting point of Carbon family?

In a structure, oxide ions are cubical closest packed where as 1/8 of tetrahedral voids are occupied by A+2 cation and 1/2 of octahedral voids are occupied by B+3 cations. The formula for this compound is

The melting point of alkanes ___ with ___ in molecular weight.

What are isoelectronic species?

Write the differences between with examples:(a) a strong electrolyte and a weak electrolyte.(b) electrolytic dissociation and ionization.

Cumene on treatment with KMnO4 gives :-

Ammonia was initially called ___.

why SF4 is electron deficient species ,it should have ten electrons ? why it acts as lewis acids

Which statement describes the fact that pesticides move up the food chain?

(c) Draw the structural formulae of the two isomers of Butane. Give the correct lUPAC name of each isomer.

IfF copper is kept exposed to damp air for a considerable time, it gets a green coating on its surface. This is due to the formation of: (a) hydrated copper sulphate (b) copper oxide (c basic copper carbonate (d) copper nitrate

Cl+ Lewis dot structure

(a) Write the structures of the main products of the following reactions :(b) Give a simple chemical test to distinguish between Aniline and N, N-dimethylaniline. (c) Arrange the following in the increasing order of their pKb values :C6H5NH2, C2H5NH2, C6H5NHCH3

Which of the following lines in the periodic table separates metals from non-metals?

What is a longitudal wave?How should we find it's wavelength?

calculate the total pressure in a 10 litre cylinder which contains 0.4g He , 1.6g of oxygen and 1.4g of nitrogen at 27'C . also calculate the partial pressure of He gas in the cylinder . assume ideal behaviour for gases .

25. Which of the following is the main organic product obtained by tge reaction of 2,2,2-trichloro ethanal with calcium hydroxide ? A chloroform B methylene chloride C CCl4 D trichloro ethane

If 3 moles of oxygen combines with aluminium the weight of aluminium used in the reaction

\( \frac{\text { Sadaline }}{4} \)\( A, A \) is

22. The compound which contains both ionic and covalent bonds 1. C2H4 2. CaCl2 3.CaC2 4.C2H2

In the reactionHCl + NaOH --> NaCl + H2O + x calH2SO4 + 2NaOH --> Na2SO4 + 2H2O + y cal(1) x = y(2) x = 2y(3) x = y/2(4) x2 = y

The ratio of Fe3+ and Fe2+ in Fe0.9S1.0 is ?

What are functional isomers?

Why the temperature of the mixture of HCl rises when aluminium is added to it.

Why intermolecular force of attraction is higher in ionic compound than covelent compound??

a ring consisting of two parts ADB and ACB of same conductivity K carries an amount of heat H.the ADB part is now replaced with another metal keeping the tempertaures T1 and T2 constant.the heat carried increases to 2H.what should be the conductivity of the new ADB part?(given ACB/ADB=3)

Aluminum chloride exists as a dimer Al2Cl6 in solid state as well as in solution of non-polar solvents such as C6H6. When dissolved in acidified aqueous solution, it gives:

Write down the names of compounds represented by the following formulae: 1. Al2 (SO4)32. CaCl23. K2SO44. KNO35. CaCO36. NaNO3 7. ZnCO38. Na3PO4

1. The third nearest neighbours of body centered sodium ion in NaCI structure is(1) 6 CI(3) 12 CI(2) 8 CI-(4) 10 CI-

A train with stoppages,covers a distance at 60 Km/hr and without stoppages at 90 Km/hr. The train stops for ______ min/hr

The GAM of hydrogen is 1 g. How many grams of hydrogen gas contains avogadro number of molecules?

A cylinder can withstand a pressure of 15 atm. The pressure gauge of the cylinder indicates 12 atm at 27∘C. Above the cylinder will explode.

Write balanced equation to show the reaction between the sulphur and hot concentrated nitric acid.

which one has minimum effective nuclear charge?LiNaKCsshould it not be 4th one?

Determine the empirical formula of an oxide of iron, which has 69.9% iron and 30.1% dioxygen by mass.

Which of the given reactions supports or suggests that ethanol is acidic in nature?

Convert 1920 seconds into radion

What is the ratio of emperical formula mass to molecular formula mass of benzene

(a) Al3+, Cu2+, Na+, Zn2+ ions are present in an aqueous solution, such that the concentration of ions is same. write the order of discharge of ions.(b) Amongst the OH− ions and Br− ions which are likely to discharge first?

(a) Explain the process of preparation of soap in the laboratory. (b) Why is common salt (sodium chloride) added during the preparation of soap? (c) Why is soap not suitable for washing clothes when the water is hard?

A student was asked to carry out a chemical reaction by placing four different metal strips in CuSO4 solution for a considerable time, one by one. Which of the following metal strip will turn the blue CuSO4 solution to a colourless solution in due course of time?(1) Fe(2) Au(3) Mg(4) Ag

Though zinc is more reactive than iron, yet it prevents rusting. Justify.

Find the mass of lead formed by the reduction of 342.5 g of red lead(Pb3O4) in a current of hydrogen.

In the conversion of compound X into compound Z, it was found that the reaction proceeded by way of Y, which could be isolated. The following steps were involved. X → Y; endothermic process Y → Z; exothermic process Which is the reaction profile of this conversion from X to Z?

26.Write IUPAC name of C2H5COC4H9 and C3H7COOC2H5 and (C2H5)3C-CH2-CH2-C(C2H5)3

5. An oxide of a metal M has 47% by mass of oxygen. Metal M has atomic mass of 24. The empirical formula of the oxide is?

The melting point of alkanes _ with _ in molecular weight.