7248 + Interview Questions in Chemistry

1.	Question 2 (c) Fill in the blank: Fuel must be heated to its ___ before it starts burning.
Answer» Question 2 (c) Fill in the blank: Fuel must be heated to its ___ before it starts burning.

Discussion

2.	What are polycot and polywool? Is PET similar to them? [3 Marks]
Answer» What are polycot and polywool? Is PET similar to them? [3 Marks]

Discussion

3.	State two physical properties on the basis of which metals can be distinguished form non-metals.
Answer» State two physical properties on the basis of which metals can be distinguished form non-metals.

Discussion

4.	What is the freezing point of ammonia?
Answer» What is the freezing point of ammonia?

Discussion

5.	Metals react with dilute acids to form metal salts and release ___ gas.
Answer» Metals react with dilute acids to form metal salts and release ___ gas.

Discussion

6.	Identify the gas that is generally produced when coal is burnt in the presence of air.
Answer» Identify the gas that is generally produced when coal is burnt in the presence of air.

Discussion

7.	Burns caused by steam at 100℃are more severe than those caused by boiling water at 100℃
Answer» Burns caused by steam at 100℃are more severe than those caused by boiling water at 100℃

Discussion

8.	Name two substances having low ignition temperatures and two having high ignition temperatures.
Answer» Name two substances having low ignition temperatures and two having high ignition temperatures.

Discussion

9.	State the chemical property in each case on which the following uses of baking soda are based (i) as an antacid. (ii) as a constituent of baking powder. [3 MARKS]
Answer» State the chemical property in each case on which the following uses of baking soda are based (i) as an antacid. (ii) as a constituent of baking powder. [3 MARKS]

Discussion

10.	Which of the following is a neutralisation reaction?
Answer» Which of the following is a neutralisation reaction?

Discussion

11.	Why do fire brigades pour water on the fire?
Answer» Why do fire brigades pour water on the fire?

Discussion

12.	When there are no external forces, the shape of a liquid drop is determined by
Answer» When there are no external forces, the shape of a liquid drop is determined by

Discussion

13.	The reaction in which a single reactant breaks down to give simpler products is called __ reaction.
Answer» The reaction in which a single reactant breaks down to give simpler products is called __ reaction.

Discussion

14.	Complete the following reaction: Na2CO3+H2SO4→ ___?
Answer» Complete the following reaction: $N a_{2} C O_{3} + H_{2} S O_{4} \to$ ___?

Discussion

15.	What can be done to make pure water conductive?
Answer» What can be done to make pure water conductive?

Discussion

16.	Water purification refers to________.
Answer» Water purification refers to________.

Discussion

17.	Consider the following reaction. CaCO3 + H2O + CO2 → Ca(HCO3)2 Element Number of atoms present Reactant sideProduct sideCalcium11Carbon2YOxygenX6Hydrogen22 Recognise X and Y. The value of X+Y is___.
Answer» Consider the following reaction. $C a C O_{3}$ + $H_{2} O$ + $C O_{2}$ $\to$ $C a (H C O_{3})_{2}$ $\begin{matrix} E l e m e n t & N u m b e r o f a t o m s p r e s e n t \end{matrix}$ $\begin{matrix} R e a c t a n t s i d e & P r o d u c t s i d e C a l c i u m & 1 & 1 C a r b o n & 2 & Y O x y g e n & X & 6 H y d r o g e n & 2 & 2 \end{matrix}$ Recognise $X$ and $Y$ . The value of $X + Y$ is___.

Discussion

18.	A block of mass 5 kg is sliding on a smooth floor with a velocity of 20 ms−1. The amount of work required to stop it is:
Answer» A block of mass 5 kg is sliding on a smooth floor with a velocity of $20 m s^{- 1}$ . The amount of work required to stop it is:

Discussion

19.	Water is ___________ resource.
Answer» Water is ___________ resource.

Discussion

20.	Which of the following equations does not follow the law of conservation of mass?
Answer» Which of the following equations does not follow the law of conservation of mass?

Discussion

21.	Explain the reducing action of carbon monoxide.
Answer» Explain the reducing action of carbon monoxide.

Discussion

22.	The monomer of polyester is -
Answer» The monomer of polyester is -

Discussion

23.	Question 22 (iii) Fill in the blanks (iii) The first fully synthetic fibre was ___
Answer» Question 22 (iii) Fill in the blanks (iii) The first fully synthetic fibre was ___

Discussion

24.	Identify the products in the following reaction. 2H2O2→2H2O+O2
Answer» Identify the products in the following reaction. $2 H_{2} O_{2} \to 2 H_{2} O + O_{2}$

24.

Identify the products in the following reaction. 2H2O2→2H2O+O2

Answer»

Identify the products in the following reaction.

$2 H_{2} O_{2} \to 2 H_{2} O + O_{2}$

Discussion

25.	C-C bond length is maximum in ___ .
Answer» C-C bond length is maximum in ___ .

Discussion

26.	The value of x in the following reaction is ______. 2Na+2H2O→xNaOH+H2
Answer» The value of $x$ in the following reaction is ______. $2 N a + 2 H_{2} O \to x N a O H + H_{2}$

Discussion

27.	Identify the fibre used in swim suits and T - shirts as it has great elasticity.
Answer» Identify the fibre used in swim suits and T - shirts as it has great elasticity.

Discussion

28.	Atoms achieve octet by:
Answer» Atoms achieve octet by:

Discussion

29.	We get to see nitric acid in combined state in the salts of ___________
Answer» We get to see nitric acid in combined state in the salts of ___________

Discussion

30.	Consider the following chemical equation for the combustion of methane (CH4) CH4+2O2→CO2+2H2O
Answer» Consider the following chemical equation for the combustion of methane ( $C H_{4}$ ) $C H_{4} + 2 O_{2} \to C O_{2} + 2 H_{2} O$

30.

Consider the following chemical equation for the combustion of methane (CH4) CH4+2O2→CO2+2H2O

Answer»

Consider the following chemical equation for the combustion of methane ( $C H_{4}$ )

$C H_{4} + 2 O_{2} \to C O_{2} + 2 H_{2} O$

Discussion

31.	What are the characteristics of the molecular structure of gas? [5 MARKS]
Answer» What are the characteristics of the molecular structure of gas? [5 MARKS]

Discussion

32.	How to valance any equation
Answer» How to valance any equation

Discussion

33.	The correct order of the products collected from the fractional distillation column from top to bottom is:
Answer» The correct order of the products collected from the fractional distillation column from top to bottom is:

Discussion

34.	What happens when metals react with an acid
Answer» What happens when metals react with an acid

Discussion

35.	Difference between CNG and LPG
Answer» Difference between CNG and LPG

Discussion

36.	Which of the following is a pollutant?
Answer» Which of the following is a pollutant?

Discussion

37.	Natural gas is not used:
Answer» Natural gas is not used:

Discussion

38.	Why does Cu not react with Ag?
Answer» Why does Cu not react with Ag?

Discussion

39.	Give example of liquids that are: [3 MARKS] (i) Completely miscible (ii) Partially miscible (iii) Practically immiscible
Answer» Give example of liquids that are: [3 MARKS] (i) Completely miscible (ii) Partially miscible (iii) Practically immiscible

Discussion

40.	Describe the reaction magnesium +Cooper sulphate gives magnesium sulphate +copper
Answer» Describe the reaction magnesium +Cooper sulphate gives magnesium sulphate +copper

Discussion

41.	Which of the following methods can be used to prevent corrosion?
Answer» Which of the following methods can be used to prevent corrosion?

Discussion

42.	Ratio of number of atoms in one mole of oxygen molecule to ozone is _____.
Answer» Ratio of number of atoms in one mole of oxygen molecule to ozone is _____.

Discussion

43.	Which of the substances Na, Hg, S, Pt and graphite can be used as electrodes in electrolytic cells having aqueous solutions [AIIMS 1982]
Answer» Which of the substances Na, Hg, S, Pt and graphite can be used as electrodes in electrolytic cells having aqueous solutions [AIIMS 1982]

43.

Which of the substances Na, Hg, S, Pt and graphite can be used as electrodes in electrolytic cells having aqueous solutions [AIIMS 1982]

Answer»

Which of the substances Na, Hg, S, Pt and graphite can be used as electrodes in electrolytic cells having aqueous solutions

[AIIMS 1982]

Discussion

44.	Can we cut gold platinum and iron with knife ?
Answer» Can we cut gold platinum and iron with knife ?

Discussion

45.	To which kind of synthetic fibres does terylene belong?
Answer» To which kind of synthetic fibres does terylene belong?

Discussion

46.	Name the fuel which is used in jet aircraft engines.
Answer» Name the fuel which is used in jet aircraft engines.

Discussion

47.	How is peat formed?
Answer» How is peat formed?

Discussion

48.	Antacids contain strong base or weak base?
Answer» Antacids contain strong base or weak base?

Discussion

49.	Differentiate between polar and non polar substances with examples of each.
Answer» Differentiate between polar and non polar substances with examples of each.

Discussion

50.	Choose the correct statements about sugar charcoal:
Answer» Choose the correct statements about sugar charcoal:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Question 2 (c) Fill in the blank: Fuel must be heated to its ___ before it starts burning.

What are polycot and polywool? Is PET similar to them? [3 Marks]

State two physical properties on the basis of which metals can be distinguished form non-metals.

What is the freezing point of ammonia?

Metals react with dilute acids to form metal salts and release ___ gas.

Identify the gas that is generally produced when coal is burnt in the presence of air.

Burns caused by steam at 100℃are more severe than those caused by boiling water at 100℃

Name two substances having low ignition temperatures and two having high ignition temperatures.

State the chemical property in each case on which the following uses of baking soda are based (i) as an antacid. (ii) as a constituent of baking powder. [3 MARKS]

Which of the following is a neutralisation reaction?

Why do fire brigades pour water on the fire?

When there are no external forces, the shape of a liquid drop is determined by

The reaction in which a single reactant breaks down to give simpler products is called __ reaction.

Complete the following reaction: Na2CO3+H2SO4→ ___?

What can be done to make pure water conductive?

Water purification refers to________.

Consider the following reaction. CaCO3 + H2O + CO2 → Ca(HCO3)2 Element Number of atoms present Reactant sideProduct sideCalcium11Carbon2YOxygenX6Hydrogen22 Recognise X and Y. The value of X+Y is___.

A block of mass 5 kg is sliding on a smooth floor with a velocity of 20 ms−1. The amount of work required to stop it is:

Water is ___________ resource.

Which of the following equations does not follow the law of conservation of mass?

Explain the reducing action of carbon monoxide.

The monomer of polyester is -

Question 22 (iii) Fill in the blanks (iii) The first fully synthetic fibre was ___

Identify the products in the following reaction. 2H2O2→2H2O+O2

C-C bond length is maximum in ___ .

The value of x in the following reaction is ______. 2Na+2H2O→xNaOH+H2

Identify the fibre used in swim suits and T - shirts as it has great elasticity.

Atoms achieve octet by:

We get to see nitric acid in combined state in the salts of ___________

Consider the following chemical equation for the combustion of methane (CH4) CH4+2O2→CO2+2H2O

What are the characteristics of the molecular structure of gas? [5 MARKS]

How to valance any equation

The correct order of the products collected from the fractional distillation column from top to bottom is:

What happens when metals react with an acid

Difference between CNG and LPG

Which of the following is a pollutant?

Natural gas is not used:

Why does Cu not react with Ag?

Give example of liquids that are: [3 MARKS] (i) Completely miscible (ii) Partially miscible (iii) Practically immiscible

Describe the reaction magnesium +Cooper sulphate gives magnesium sulphate +copper

Which of the following methods can be used to prevent corrosion?

Ratio of number of atoms in one mole of oxygen molecule to ozone is _____.

Which of the substances Na, Hg, S, Pt and graphite can be used as electrodes in electrolytic cells having aqueous solutions [AIIMS 1982]

Can we cut gold platinum and iron with knife ?

To which kind of synthetic fibres does terylene belong?

Name the fuel which is used in jet aircraft engines.

How is peat formed?

Antacids contain strong base or weak base?

Differentiate between polar and non polar substances with examples of each.

Choose the correct statements about sugar charcoal: