15280 + Interview Questions in Chemistry

1.	Which of the following groups does not contain transition elements?
Answer» Which of the following groups does not contain transition elements?

Discussion

2.	Acids change the colour of methyl orange to:
Answer» Acids change the colour of methyl orange to:

Discussion

3.	NAME a basic solution which doesn't contain a metallic element.
Answer» NAME a basic solution which doesn't contain a metallic element.

Discussion

4.	Principal, azimuthal and magnetic quantum numbers are respectively related to:
Answer» Principal, azimuthal and magnetic quantum numbers are respectively related to:

Discussion

5.	A student puts his signature with graphite pencil.if the mass of carbon in the signature is 10 to the power -12g, calculate the number of carbon atoms in the signature
Answer» A student puts his signature with graphite pencil.if the mass of carbon in the signature is 10 to the power -12g, calculate the number of carbon atoms in the signature

Discussion

6.	What do you mean by the term stoichiometric cofficient?
Answer» What do you mean by the term stoichiometric cofficient?

Discussion

7.	Why does inert gases placed in zero group ?
Answer» Why does inert gases placed in zero group ?

Discussion

8.	why nh3 is not an ion while nh4 is a ion?
Answer» why nh3 is not an ion while nh4 is a ion?

Discussion

9.	Why aluminium sheets do not corrode easily?
Answer» Why aluminium sheets do not corrode easily?

Discussion

10.	Q. The rate of a first order reaction is 0.04 mole L-1 sec-1 at 10 minutes and 0.03 mole L-1 sec-1 at 20 minutes, respectively after initiation . Find the half life of the reaction.
Answer» Q. The rate of a first order reaction is 0.04 mole L^-1 sec^-1 at 10 minutes and 0.03 mole L^-1 sec^-1 at 20 minutes, respectively after initiation . Find the half life of the reaction.

Discussion

11.	What is the difference between sulphate and sulphide?
Answer» What is the difference between sulphate and sulphide?

Discussion

12.	what will happen when a highly electro positive element bonded to another element of high electro negativity
Answer» what will happen when a highly electro positive element bonded to another element of high electro negativity

Discussion

13.	Write the name and structure of a saturated compound in which the carbon atoms are arranged in ring. Give the number of single bonds. Sir/mam, can we write CYCLOHEXANE!
Answer» Write the name and structure of a saturated compound in which the carbon atoms are arranged in ring. Give the number of single bonds. Sir/mam, can we write CYCLOHEXANE!

Discussion

14.	Write any 5 prevention methods of rancidity and corrosion
Answer» Write any 5 prevention methods of rancidity and corrosion

Discussion

15.	In an ecosystem : (i) the flow of energy is unidirectional. (ii) the flow of materials is unidirectional. (iii) the flow of materials is cyclic. (iv) the flow of energy is cyclic. (a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iv) (d) (i) and (iii)
Answer» In an ecosystem : (i) the flow of energy is unidirectional. (ii) the flow of materials is unidirectional. (iii) the flow of materials is cyclic. (iv) the flow of energy is cyclic. (a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iv) (d) (i) and (iii)

15.

In an ecosystem : (i) the flow of energy is unidirectional. (ii) the flow of materials is unidirectional. (iii) the flow of materials is cyclic. (iv) the flow of energy is cyclic. (a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iv) (d) (i) and (iii)

Answer»

In an ecosystem :

(i) the flow of energy is unidirectional.

(ii) the flow of materials is unidirectional.

(iii) the flow of materials is cyclic.

(iv) the flow of energy is cyclic.

(a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iv) (d) (i) and (iii)

Discussion

16.	A white powdery substance having a strong smell of chlorine is used for disinfecting drinking water supply at waterworks. Identify the substance. Give its chemical name and write the chemical reaction for its preparation.
Answer» A white powdery substance having a strong smell of chlorine is used for disinfecting drinking water supply at waterworks. Identify the substance. Give its chemical name and write the chemical reaction for its preparation.

Discussion

17.	Which of the following hydrocarbons is unsaturated? C3H4; C2H6
Answer» Which of the following hydrocarbons is unsaturated? $C_{3} H_{4}; C_{2} H_{6}$

Discussion

18.	Describe an activity to find out how ethanoic acid reacts with sodium carbonate. Name the gas evolved. How can the gas be tested ?
Answer» Describe an activity to find out how ethanoic acid reacts with sodium carbonate. Name the gas evolved. How can the gas be tested ?

Discussion

19.	The weight of 4gram atoms of nitrogen is
Answer» The weight of 4gram atoms of nitrogen is

Discussion

20.	Cryogenic __ is the process by which metals become more resistant to wear and tear by freezing them to low temperatures.
Answer» Cryogenic __ is the process by which metals become more resistant to wear and tear by freezing them to low temperatures.

Discussion

21.	Arrange F, Cl, O, and N in the decreasing order of electronegativity.
Answer» Arrange F, Cl, O, and N in the decreasing order of electronegativity.

Discussion

22.	There is a cyclic compound `X` which is unsaturated and burns with sooty flame. Identify `X` and write its structural formula. Will it decolorize bromine water?
Answer» There is a cyclic compound `X` which is unsaturated and burns with sooty flame. Identify `X` and write its structural formula. Will it decolorize bromine water?

22.

There is a cyclic compound `X` which is unsaturated and burns with sooty flame. Identify `X` and write its structural formula. Will it decolorize bromine water?

Answer»

There is a cyclic compound `X` which is unsaturated and burns with sooty flame. Identify `X` and write its structural formula. Will it decolorize bromine water?

Discussion

23.	A white precipitate can be obtained by adding dilute sulphuric acid to : (a) CuSO4 Solution (b) NaCI Solution (c) BaCl2 Solution (d) Na2SO4 Solution
Answer» A white precipitate can be obtained by adding dilute sulphuric acid to : (a) $C u S O_{4}$ Solution (b) NaCI Solution (c) $B a C l_{2}$ Solution (d) $N a_{2} S O_{4}$ Solution

23.

A white precipitate can be obtained by adding dilute sulphuric acid to : (a) CuSO4 Solution (b) NaCI Solution (c) BaCl2 Solution (d) Na2SO4 Solution

Answer»

A white precipitate can be obtained by adding dilute sulphuric acid to :

(a) $C u S O_{4}$ Solution (b) NaCI Solution (c) $B a C l_{2}$ Solution (d) $N a_{2} S O_{4}$ Solution

Discussion

24.	Given below are the elements with their atomic masses. Identify a set of elements which is not a Dobereiner triad.
Answer» Given below are the elements with their atomic masses. Identify a set of elements which is not a Dobereiner triad.

Discussion

25.	Why was the mass of an atom initially taken as 116th of the mass of naturally occurring oxygen as the standard unit?
Answer» Why was the mass of an atom initially taken as $\frac{1}{16} t h$ of the mass of naturally occurring oxygen as the standard unit?

Discussion

26.	___acids have even higher boiling points than alkanes and alcohol.
Answer» ___acids have even higher boiling points than alkanes and alcohol.

Discussion

27.	2CH3COOH+Ca(OH)2→2H2O+___
Answer» $2 C H_{3} C O O H + C a (O H)_{2} \to 2 H_{2} O +$ ___

Discussion

28.	State the differences between Inexhaustible and exhaustible natural resources? Give some examples for each. [5 MARKS]
Answer» State the differences between Inexhaustible and exhaustible natural resources? Give some examples for each. [5 MARKS]

Discussion

29.	Volume occupied by 1 mole of a gas at STP is 22.7L or 22.4L? As internet is showing it 22.4L and our school is teaching it 22.7L.
Answer» Volume occupied by 1 mole of a gas at STP is 22.7L or 22.4L? As internet is showing it 22.4L and our school is teaching it 22.7L.

29.

Volume occupied by 1 mole of a gas at STP is 22.7L or 22.4L? As internet is showing it 22.4L and our school is teaching it 22.7L.

Answer»

Volume occupied by 1 mole of a gas at STP is 22.7L or 22.4L?

As internet is showing it 22.4L and our school is teaching it 22.7L.

Discussion

30.	(a) State the modern periodic law. (b) How many periods and groups are there in the modern periodic table?
Answer» (a) State the modern periodic law. (b) How many periods and groups are there in the modern periodic table?

30.

(a) State the modern periodic law. (b) How many periods and groups are there in the modern periodic table?

Answer»

(a) State the modern periodic law.

(b) How many periods and groups are there in the modern periodic table?

Discussion

31.	An element has successive ionization enthalpy as 940, 2080, 3090, 4140, 7030, 7870, 16000 and 19,500 KJ/mole. To which group of the periodic table does the element belong to?
Answer» An element has successive ionization enthalpy as 940, 2080, 3090, 4140, 7030, 7870, 16000 and 19,500 KJ/mole. To which group of the periodic table does the element belong to?

Discussion

32.	Write the uses of gold, mercury, and zinc. [3 MARKS]
Answer» Write the uses of gold, mercury, and zinc. [3 MARKS]

Discussion

33.	Question 10 Which of the following is the correct representation of electron dot structure of nitrogen (a) (b) (c) (d)
Answer» Question 10 Which of the following is the correct representation of electron dot structure of nitrogen (a) (b) (c) (d)

Discussion

34.	How wouild you show that silver is chemically less reactive than copper?
Answer» How wouild you show that silver is chemically less reactive than copper?

Discussion

35.	Which causes the most deforestation?
Answer» Which causes the most deforestation?

Discussion

36.	Is photosynthesis a combination reaction?? Pls explain
Answer» Is photosynthesis a combination reaction?? Pls explain

36.

Is photosynthesis a combination reaction?? Pls explain

Answer»

Is photosynthesis a combination reaction??

Pls explain

Discussion

37.	State whether the following statement is true or false : Copper sulphate crystals are always wet due to the presence of water of crystallisation in them.
Answer» State whether the following statement is true or false : Copper sulphate crystals are always wet due to the presence of water of crystallisation in them.

37.

State whether the following statement is true or false : Copper sulphate crystals are always wet due to the presence of water of crystallisation in them.

Answer»

State whether the following statement is true or false :

Copper sulphate crystals are always wet due to the presence of water of crystallisation in them.

Discussion

38.	What are the main features of the modern periodic theory?
Answer» What are the main features of the modern periodic theory?

Discussion

39.	What is difference between baking soda and powder?
Answer» What is difference between baking soda and powder?

Discussion

40.	A salt X when dissolved in distilled water gives a clear solution which turms red litmus blue. Explain the phenomenon.
Answer» A salt X when dissolved in distilled water gives a clear solution which turms red litmus blue. Explain the phenomenon.

Discussion

41.	Which of the following is ethanol?
Answer» Which of the following is ethanol?

Discussion

42.	What will be the end product of this reaction ?CH2=CH2+H.H2SO4→
Answer» What will be the end product of this reaction ? $C H_{2} = C H_{2} + H . H_{2} S O_{4} \to$

Discussion

43.	Elements X,Y and Z belongs to the groups 2,9 and 15 respectively of the periodic table. Which two elements will form covalent bond?
Answer» Elements X,Y and Z belongs to the groups 2,9 and 15 respectively of the periodic table. Which two elements will form covalent bond?

Discussion

44.	there are several orbitals with only one electron, they create a partial charge on the atom,making it like a tiny magnet.how?
Answer» there are several orbitals with only one electron, they create a partial charge on the atom,making it like a tiny magnet.how?

Discussion

45.	It is observed that the metallic character of an element increases down a group. Then how can we determine how the non metallic character of an element increases?
Answer» It is observed that the metallic character of an element increases down a group. Then how can we determine how the non metallic character of an element increases?

Discussion

46.	The number of electrons present in the valence shell of the central atom of super octet molecules is:
Answer» The number of electrons present in the valence shell of the central atom of super octet molecules is:

Discussion

47.	Question 5 (b) How will you name the following compounds?
Answer» Question 5 (b) How will you name the following compounds?

Discussion

48.	State whether the following conversions are oxidation or reduction. (a) PbO2+SO2→PbSO4 (b) K→K+e−
Answer» State whether the following conversions are oxidation or reduction. (a) $P b O_{2} + S O_{2} \to P b S O_{4}$ (b) $K \to K^{+} e^{-}$

48.

State whether the following conversions are oxidation or reduction. (a) PbO2+SO2→PbSO4 (b) K→K+e−

Answer»

State whether the following conversions are oxidation or reduction.

(a) $P b O_{2} + S O_{2} \to P b S O_{4}$

(b) $K \to K^{+} e^{-}$

Discussion

49.	C4H9Cl with Na/ ether gives 2,5 - dimethyl hexane. The name of C4H9Cl is
Answer» $C_{4} H_{9} C l$ with Na/ ether gives 2,5 - dimethyl hexane. The name of $C_{4} H_{9} C l$ is

Discussion

50.	Name the gas evolved during fermentation process. List the two products formed when enzyme invertase reacts with sugar present in molasses. [2 MARKS]
Answer» Name the gas evolved during fermentation process. List the two products formed when enzyme invertase reacts with sugar present in molasses. [2 MARKS]

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following groups does not contain transition elements?

Acids change the colour of methyl orange to:

NAME a basic solution which doesn't contain a metallic element.

Principal, azimuthal and magnetic quantum numbers are respectively related to:

A student puts his signature with graphite pencil.if the mass of carbon in the signature is 10 to the power -12g, calculate the number of carbon atoms in the signature

What do you mean by the term stoichiometric cofficient?

Why does inert gases placed in zero group ?

why nh3 is not an ion while nh4 is a ion?

Why aluminium sheets do not corrode easily?

Q. The rate of a first order reaction is 0.04 mole L​​​​​​-1 sec​​​​-1 at 10 minutes and 0.03 mole L​​​​​​-1 sec​​​​-1 at 20 minutes, respectively after initiation . Find the half life of the reaction.

What is the difference between sulphate and sulphide?

what will happen when a highly electro positive element bonded to another element of high electro negativity

Write the name and structure of a saturated compound in which the carbon atoms are arranged in ring. Give the number of single bonds. Sir/mam, can we write CYCLOHEXANE!

Write any 5 prevention methods of rancidity and corrosion

In an ecosystem : (i) the flow of energy is unidirectional. (ii) the flow of materials is unidirectional. (iii) the flow of materials is cyclic. (iv) the flow of energy is cyclic. (a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iv) (d) (i) and (iii)

A white powdery substance having a strong smell of chlorine is used for disinfecting drinking water supply at waterworks. Identify the substance. Give its chemical name and write the chemical reaction for its preparation.

Which of the following hydrocarbons is unsaturated? C3H4; C2H6

Describe an activity to find out how ethanoic acid reacts with sodium carbonate. Name the gas evolved. How can the gas be tested ?

The weight of 4gram atoms of nitrogen is

Cryogenic __ is the process by which metals become more resistant to wear and tear by freezing them to low temperatures.

Arrange F, Cl, O, and N in the decreasing order of electronegativity.

There is a cyclic compound `X` which is unsaturated and burns with sooty flame. Identify `X` and write its structural formula. Will it decolorize bromine water?

A white precipitate can be obtained by adding dilute sulphuric acid to : (a) CuSO4 Solution (b) NaCI Solution (c) BaCl2 Solution (d) Na2SO4 Solution

Given below are the elements with their atomic masses. Identify a set of elements which is not a Dobereiner triad.

Why was the mass of an atom initially taken as 116th of the mass of naturally occurring oxygen as the standard unit?

___acids have even higher boiling points than alkanes and alcohol.

2CH3COOH+Ca(OH)2→2H2O+___

State the differences between Inexhaustible and exhaustible natural resources? Give some examples for each. [5 MARKS]

Volume occupied by 1 mole of a gas at STP is 22.7L or 22.4L? As internet is showing it 22.4L and our school is teaching it 22.7L.

(a) State the modern periodic law. (b) How many periods and groups are there in the modern periodic table?

An element has successive ionization enthalpy as 940, 2080, 3090, 4140, 7030, 7870, 16000 and 19,500 KJ/mole. To which group of the periodic table does the element belong to?

Write the uses of gold, mercury, and zinc. [3 MARKS]

Question 10 Which of the following is the correct representation of electron dot structure of nitrogen (a) (b) (c) (d)

How wouild you show that silver is chemically less reactive than copper?

Which causes the most deforestation?

Is photosynthesis a combination reaction?? Pls explain

State whether the following statement is true or false : Copper sulphate crystals are always wet due to the presence of water of crystallisation in them.

What are the main features of the modern periodic theory?

What is difference between baking soda and powder?

A salt X when dissolved in distilled water gives a clear solution which turms red litmus blue. Explain the phenomenon.

Which of the following is ethanol?

What will be the end product of this reaction ?CH2=CH2+H.H2SO4→

Elements X,Y and Z belongs to the groups 2,9 and 15 respectively of the periodic table. Which two elements will form covalent bond?

there are several orbitals with only one electron, they create a partial charge on the atom,making it like a tiny magnet.how?

It is observed that the metallic character of an element increases down a group. Then how can we determine how the non metallic character of an element increases?

The number of electrons present in the valence shell of the central atom of super octet molecules is:

Question 5 (b) How will you name the following compounds?

State whether the following conversions are oxidation or reduction. (a) PbO2+SO2→PbSO4 (b) K→K+e−

C4H9Cl with Na/ ether gives 2,5 - dimethyl hexane. The name of C4H9Cl is

Name the gas evolved during fermentation process. List the two products formed when enzyme invertase reacts with sugar present in molasses. [2 MARKS]

Q. The rate of a first order reaction is 0.04 mole L-1 sec-1 at 10 minutes and 0.03 mole L-1 sec-1 at 20 minutes, respectively after initiation . Find the half life of the reaction.