7248 + Interview Questions in Chemistry Page 1 InterviewSolution

1.	40. Bond angle . BCl3 and BBr3
Answer» 40. Bond angle . BCl3 and BBr3

Discussion

2.	18. On cooling Chlorine water, there deposits greenish yellow crystals of Cl2.xH2O. Value of x is what?
Answer» 18. On cooling Chlorine water, there deposits greenish yellow crystals of Cl2.xH2O. Value of x is what?

Discussion

3.	a and b are van der Waals constants. Which gas will liquefy easily?
Answer» a and b are van der Waals constants. Which gas will liquefy easily?

Discussion

4.	Doctor who examines and give medical treatments for eyes is
Answer» Doctor who examines and give medical treatments for eyes is

Discussion

5.	Identify the gas(es) which is released when coal is burnt in the presence of air.
Answer» Identify the gas(es) which is released when coal is burnt in the presence of air.

Discussion

6.	A sample of calcium carbonate weighing 5g was heated. It yielded 2.25g of calcium oxide along with 1.4L of carbon dioxide.Prove that the given information explains the law of conservation of mass.
Answer» A sample of calcium carbonate weighing 5g was heated. It yielded 2.25g of calcium oxide along with 1.4L of carbon dioxide. Prove that the given information explains the law of conservation of mass.

Discussion

7.	Question 19Is it possible for the atom of an element to have one electron, one proton and no neutron? If so, name the element.
Answer» Question 19 Is it possible for the atom of an element to have one electron, one proton and no neutron? If so, name the element.

Discussion

8.	What is the correct chemical equation for the combustion of charcoal (carbon) in the presence of oxygen?
Answer» What is the correct chemical equation for the combustion of charcoal (carbon) in the presence of oxygen?

Discussion

9.	(a) Name one metal which can displace iron form iron sulphate solution. (b) Name one metal which cannot displace iron form iron sulphate solution.
Answer» (a) Name one metal which can displace iron form iron sulphate solution. (b) Name one metal which cannot displace iron form iron sulphate solution.

9.

(a) Name one metal which can displace iron form iron sulphate solution. (b) Name one metal which cannot displace iron form iron sulphate solution.

Answer»

(a) Name one metal which can displace iron form iron sulphate solution.

(b) Name one metal which cannot displace iron form iron sulphate solution.

Discussion

10.	Question 2What is a good fuel?
Answer» Question 2 What is a good fuel?

Discussion

11.	17. When Methane burns in air to give carbon dioxide,water and heat. Balanced it.
Answer» 17. When Methane burns in air to give carbon dioxide,water and heat. Balanced it.

Discussion

12.	a gas a obtained by heating aluminium with sodium hydroxide was passed over a black solid, b at 773K when a grey metal C and colourless liquid D is obtained. The metal C displaces copper from copper sulphate solution and becomes passive on treatment with HNO3. Identify A, B, C and D. explain all the reactions
Answer» a gas a obtained by heating aluminium with sodium hydroxide was passed over a black solid, b at 773K when a grey metal C and colourless liquid D is obtained. The metal C displaces copper from copper sulphate solution and becomes passive on treatment with HNO3. Identify A, B, C and D. explain all the reactions

Discussion

13.	Metals compared to non-metals have wider variation of properties. Do you agree?
Answer» Metals compared to non-metals have wider variation of properties. Do you agree?

Discussion

14.	ntTwo litres of an ideal gas at a pressure of 10 atm expands isothermally to a volume of 10 litres reversibly.external pressure 1 atm. how much heat is absorbed ?n
Answer» ntTwo litres of an ideal gas at a pressure of 10 atm expands isothermally to a volume of 10 litres reversibly.external pressure 1 atm. how much heat is absorbed ?n

Discussion

15.	What is meant by self invertible function?
Answer» What is meant by self invertible function?

Discussion

16.	The following pictures relate to burning of ________ fuels.
Answer» The following pictures relate to burning of ________ fuels.

Discussion

17.	A saturated solution of sugar in water is heated. Can you dissolve more sugar in it?
Answer» A saturated solution of sugar in water is heated. Can you dissolve more sugar in it?

Discussion

18.	Plastic bottle is an example of:
Answer» Plastic bottle is an example of:

Discussion

19.	Question 16Fill in the blanks in the following sentences.(a) Coal is one of the ___ used to cook food.(b) When heated in air, coal burns and produces mainly ___ gas(c) Coal tar is a black, thick ___ with an ___ smell.(d) Petroleum, ___ and ___ are fossil fuels.(e) Forests and coal are ___ natural resources
Answer» Question 16 Fill in the blanks in the following sentences. (a) Coal is one of the ___ used to cook food. (b) When heated in air, coal burns and produces mainly ___ gas (c) Coal tar is a black, thick ___ with an ___ smell. (d) Petroleum, ___ and ___ are fossil fuels. (e) Forests and coal are ___ natural resources

Discussion

20.	When sugar is dissolved in water, sugar is the _________, water is the _________ and sweet water is _________ respectively.
Answer» When sugar is dissolved in water, sugar is the _________, water is the _________ and sweet water is _________ respectively.

Discussion

21.	all combustible material are not fuels. justify
Answer» all combustible material are not fuels. justify

Discussion

22.	The distance of the closest approach when a 5.0 MeV proton approaches a gold nucleus is (Z=79)
Answer» The distance of the closest approach when a $5.0 MeV$ proton approaches a gold nucleus is $(Z = 79)$

Discussion

23.	Which of the following reactions will result in the formation dihydrogen gas?
Answer» Which of the following reactions will result in the formation dihydrogen gas?

Discussion

24.	The smallest unit which has an independent existence and exhibits all the properties of the substance is called a/an ________ .
Answer» The smallest unit which has an independent existence and exhibits all the properties of the substance is called a/an ________ .

Discussion

25.	Why that the paddle move in one dirction only whic we fix to detect cathode ray property while their is anode rays also.
Answer» Why that the paddle move in one dirction only whic we fix to detect cathode ray property while their is anode rays also.

Discussion

26.	100 ml of 0.3N HCl solution is mixed with 200 ml of 0.6N sulphuric acid solution . What is the normality of sulphiric acid in the final solution
Answer» 100 ml of 0.3N HCl solution is mixed with 200 ml of 0.6N sulphuric acid solution . What is the normality of sulphiric acid in the final solution

Discussion

27.	Define the term mole
Answer» Define the term mole

Discussion

28.	What are the different allotropes of carbon?
Answer» What are the different allotropes of carbon?

Discussion

29.	What are all the postulates of Dalton's atomic theory?
Answer» What are all the postulates of Dalton's atomic theory?

Discussion

30.	What is carding process?
Answer» What is carding process?

Discussion

31.	Balance the following chemical equation:NaCl+AgNO3→AgCl+NaNO3
Answer» Balance the following chemical equation: NaCl+AgNO₃→AgCl+NaNO₃

Discussion

32.	is the chemical formula of baking soda.
Answer» is the chemical formula of baking soda.

Discussion

33.	Complete the crossword given below with the help of cluesAcross 1. Substance used as synthetic wool (7 letters) 2. A plastic used for making containers and carry bags (9 letters) 3. Substance made up of a large number of smaller molecules (7 letters) 4. Another name for this compound is artificial silk (5 letters) Down 5. A type of fibre obtained naturally from the cocoon (4 letters) 6. A synthetic fibre classified as a polyester (8 letters)7. A polymer used for making rope (5 letters)
Answer» Complete the crossword given below with the help of clues Across 1. Substance used as synthetic wool (7 letters) 2. A plastic used for making containers and carry bags (9 letters) 3. Substance made up of a large number of smaller molecules (7 letters) 4. Another name for this compound is artificial silk (5 letters) Down 5. A type of fibre obtained naturally from the cocoon (4 letters) 6. A synthetic fibre classified as a polyester (8 letters) 7. A polymer used for making rope (5 letters)

Discussion

34.	What will be the increase in mass of magnesium, if 120g of magnesium is heated in presence of oxygen?
Answer» What will be the increase in mass of magnesium, if 120g of magnesium is heated in presence of oxygen?

Discussion

35.	Question 14Which non-metal is essential for our life and all living beings inhale it during breathing?
Answer» Question 14 Which non-metal is essential for our life and all living beings inhale it during breathing?

Discussion

36.	In a nearly saturated solution, the solubility increases with increase in temperature.
Answer» In a nearly saturated solution, the solubility increases with increase in temperature.

Discussion

37.	Which of the following is the only liquid metal?
Answer» Which of the following is the only liquid metal?

37.

Which of the following is the only liquid metal?

Answer»

Which of the following is the only liquid metal?

Discussion

38.	(a) What is a mixture? Give two examples of mixtures.(b) What is meant by (i) homogenous mixtures, and (ii) heterogeneous mixtures? Give two examples of homogeneous mixtures and two of heterogeneous mixtures.
Answer» (a) What is a mixture? Give two examples of mixtures. (b) What is meant by (i) homogenous mixtures, and (ii) heterogeneous mixtures? Give two examples of homogeneous mixtures and two of heterogeneous mixtures.

Discussion

39.	Explain auto-reduction Reaction in detail
Answer» Explain auto-reduction Reaction in detail

Discussion

40.	Why is water known as a universal solvent?
Answer» Why is water known as a universal solvent?

Discussion

41.	What are ionic compound? Give example.
Answer» What are ionic compound? Give example.

Discussion

42.	The decomposition of dimethyl ether leads to the formation of CH4,H2 and CO and the reaction rate is given By rate = K[CH3OCH3]32 The rate of reaction is followed by increase in pressure in a closed vessel and the rate can be expressed in terms of the partial pressure of dimethyl ether i.e, Rate = K(pCH3OCH3)32 If pressure is measured in bar and time in minutes, the units of rate constant are
Answer» The decomposition of dimethyl ether leads to the formation of $C H_{4}, H_{2}$ and CO and the reaction rate is given By rate = $K [C H_{3} O C H_{3}]^{\frac{3}{2}}$ The rate of reaction is followed by increase in pressure in a closed vessel and the rate can be expressed in terms of the partial pressure of dimethyl ether i.e, Rate = $K (p_{C} H_{3} O C H_{3})^{\frac{3}{2}}$ If pressure is measured in bar and time in minutes, the units of rate constant are

Discussion

43.	37. how can find molality when mole fraction is given?
Answer» 37. how can find molality when mole fraction is given?

Discussion

44.	Compare the chemical properties of metals and non-metals in tabular form.
Answer» Compare the chemical properties of metals and non-metals in tabular form.

Discussion

45.	Why do things burn in presence of oxygen? Why don't they burn without it?
Answer» Why do things burn in presence of oxygen? Why don't they burn without it?

Discussion

46.	Which of the oxide is acidic from the following ?
Answer» Which of the oxide is acidic from the following ?

Discussion

47.	When Iron is alloyed with a non-metal, a hard substance called steel is formed. Identify the non-metal which is used here.
Answer» When Iron is alloyed with a non-metal, a hard substance called steel is formed. Identify the non-metal which is used here.

Discussion

48.	Question 7Which of the following is not true for fertilizers?(a) They increase the yield.(b) Their excessive use disturbs the balance of nutrients in soil.(c) They are generally used in small quantity.(d) They are environment friendly.
Answer» Question 7 Which of the following is not true for fertilizers? (a) They increase the yield. (b) Their excessive use disturbs the balance of nutrients in soil. (c) They are generally used in small quantity. (d) They are environment friendly.

Discussion

49.	How is sodium chloride different from its constituent elements ?
Answer» How is sodium chloride different from its constituent elements ?

Discussion

50.	A balanced chemical equation always obeys:
Answer» A balanced chemical equation always obeys:

Discussion

Explore topic-wise InterviewSolutions in .

40. Bond angle . BCl3 and BBr3

18. On cooling Chlorine water, there deposits greenish yellow crystals of Cl2.xH2O. Value of x is what?

a and b are van der Waals constants. Which gas will liquefy easily?

Doctor who examines and give medical treatments for eyes is

Identify the gas(es) which is released when coal is burnt in the presence of air.

A sample of calcium carbonate weighing 5g was heated. It yielded 2.25g of calcium oxide along with 1.4L of carbon dioxide.Prove that the given information explains the law of conservation of mass.

Question 19Is it possible for the atom of an element to have one electron, one proton and no neutron? If so, name the element.

What is the correct chemical equation for the combustion of charcoal (carbon) in the presence of oxygen?

(a) Name one metal which can displace iron form iron sulphate solution. (b) Name one metal which cannot displace iron form iron sulphate solution.

Question 2What is a good fuel?

17. When Methane burns in air to give carbon dioxide,water and heat. Balanced it.

Metals compared to non-metals have wider variation of properties. Do you agree?

ntTwo litres of an ideal gas at a pressure of 10 atm expands isothermally to a volume of 10 litres reversibly.external pressure 1 atm. how much heat is absorbed ?n

What is meant by self invertible function?

The following pictures relate to burning of ________ fuels.

A saturated solution of sugar in water is heated. Can you dissolve more sugar in it?

Plastic bottle is an example of:

When sugar is dissolved in water, sugar is the _________, water is the _________ and sweet water is _________ respectively.

all combustible material are not fuels. justify

The distance of the closest approach when a 5.0 MeV proton approaches a gold nucleus is (Z=79)

Which of the following reactions will result in the formation dihydrogen gas?

The smallest unit which has an independent existence and exhibits all the properties of the substance is called a/an ________ .

Why that the paddle move in one dirction only whic we fix to detect cathode ray property while their is anode rays also.

100 ml of 0.3N HCl solution is mixed with 200 ml of 0.6N sulphuric acid solution . What is the normality of sulphiric acid in the final solution

Define the term mole

What are the different allotropes of carbon?

What are all the postulates of Dalton's atomic theory?

What is carding process?

Balance the following chemical equation:NaCl+AgNO3→AgCl+NaNO3

is the chemical formula of baking soda.

What will be the increase in mass of magnesium, if 120g of magnesium is heated in presence of oxygen?

Question 14Which non-metal is essential for our life and all living beings inhale it during breathing?

In a nearly saturated solution, the solubility increases with increase in temperature.

Which of the following is the only liquid metal?

(a) What is a mixture? Give two examples of mixtures.​(b) What is meant by (i) homogenous mixtures, and (ii) heterogeneous mixtures? Give two examples of homogeneous mixtures and two of heterogeneous mixtures.

Explain auto-reduction Reaction in detail

Why is water known as a universal solvent?

What are ionic compound? Give example.

37. how can find molality when mole fraction is given?

Compare the chemical properties of metals and non-metals in tabular form.

Why do things burn in presence of oxygen? Why don't they burn without it?

Which of the oxide is acidic from the following ?

When Iron is alloyed with a non-metal, a hard substance called steel is formed. Identify the non-metal which is used here.

Question 7Which of the following is not true for fertilizers?(a) They increase the yield.(b) Their excessive use disturbs the balance of nutrients in soil.(c) They are generally used in small quantity.(d) They are environment friendly.

How is sodium chloride different from its constituent elements ?

A balanced chemical equation always obeys:

When sugar is dissolved in water, sugar is the _____, water is the _ and sweet water is _____ respectively.

(a) What is a mixture? Give two examples of mixtures.(b) What is meant by (i) homogenous mixtures, and (ii) heterogeneous mixtures? Give two examples of homogeneous mixtures and two of heterogeneous mixtures.