7248 + Interview Questions in Chemistry Page 109 InterviewSolution

5401.	(a) Describe the threat to Taj Mahal monument due to air pollution. (b) State any two ways of controlling air pollution.
Answer» (a) Describe the threat to Taj Mahal monument due to air pollution. (b) State any two ways of controlling air pollution.

5401.

(a) Describe the threat to Taj Mahal monument due to air pollution. (b) State any two ways of controlling air pollution.

Answer»

(a) Describe the threat to Taj Mahal monument due to air pollution.

(b) State any two ways of controlling air pollution.

Discussion

5402.	C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + Δ The above reaction is _______ reaction.
Answer» C₆H₁₂O₆+ 6 O₂ → 6 CO₂+ 6 H₂O + Δ The above reaction is _______ reaction.

5402.

C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + Δ The above reaction is _______ reaction.

Answer»

C₆H₁₂O₆+ 6 O₂ → 6 CO₂+ 6 H₂O + Δ

The above reaction is _______ reaction.

Discussion

5403.	Which of these water sources is a major source of freshwater?
Answer» Which of these water sources is a major source of freshwater?

Discussion

5404.	Higher the calorific value the better the fuel. do you agree, justify.
Answer» Higher the calorific value the better the fuel. do you agree, justify.

Discussion

5405.	Why the use of chlorofluorocarbons should be discouraged?
Answer» Why the use of chlorofluorocarbons should be discouraged?

Discussion

5406.	Describe the process of manufacturing rayon from wood pulp
Answer» Describe the process of manufacturing rayon from wood pulp

Discussion

5407.	What will be a, b and c for the following reaction to be balanced? aFeCl3+bMgO→cFe2O3+dMgCl2
Answer» What will be a, b and c for the following reaction to be balanced? $a F e C l_{3} + b M g O \to c F e_{2} O_{3} + d M g C l_{2}$

Discussion

5408.	Unlike graphite diamond doesn't conduct electricity. Why?
Answer» Unlike graphite diamond doesn't conduct electricity. Why?

Discussion

5409.	You might have seen that many plastic wrappers or goods come with a tag saying ' Do not burn', Can you think of the reason as to why it is so?
Answer» You might have seen that many plastic wrappers or goods come with a tag saying ' Do not burn', Can you think of the reason as to why it is so?

Discussion

5410.	What do you mean by fuel efficiency? Write it's significance.
Answer» What do you mean by fuel efficiency? Write it's significance.

Discussion

5411.	The molecules of solid have a high intermolecular force of attraction, even then the molecules don't diffuse into one another. Why?
Answer» The molecules of solid have a high intermolecular force of attraction, even then the molecules don't diffuse into one another. Why?

Discussion

5412.	The gas obtained by heating sulphur powder in air is dissolved in water and the resulting solution is reacted with litmus solution. Then we will observe?
Answer» The gas obtained by heating sulphur powder in air is dissolved in water and the resulting solution is reacted with litmus solution. Then we will observe?

Discussion

5413.	What are harmfull gases released when plastics are burnt? (A) Dioxin (C) Hydrogen Chloride (C) Carbon dieoxide (D) all the above
Answer» What are harmfull gases released when plastics are burnt? (A) Dioxin (C) Hydrogen Chloride (C) Carbon dieoxide (D) all the above

Discussion

5414.	Why the cotton easily burns?
Answer» Why the cotton easily burns?

Discussion

5415.	Give reasons : (a) A gas can fill the whole vessel in which it is enclosed. (b) What do you observe when barium chloride solution is mixed with sodium sulphate solution ?
Answer» Give reasons : (a) A gas can fill the whole vessel in which it is enclosed. (b) What do you observe when barium chloride solution is mixed with sodium sulphate solution ?

5415.

Give reasons : (a) A gas can fill the whole vessel in which it is enclosed. (b) What do you observe when barium chloride solution is mixed with sodium sulphate solution ?

Answer»

Give reasons :

(a) A gas can fill the whole vessel in which it is enclosed.

(b) What do you observe when barium chloride solution is mixed with sodium sulphate solution ?

Discussion

5416.	Formation of Nitric Oxide is an___ reaction.
Answer» Formation of Nitric Oxide is an___ reaction.

Discussion

5417.	The non-metal which exists as solid at room temperature is __________.
Answer» The non-metal which exists as solid at room temperature is __________.

Discussion

5418.	A aqueous reaction in which an insoluble product (precipitate) is formed is called ___ reaction.
Answer» A aqueous reaction in which an insoluble product (precipitate) is formed is called ___ reaction.

Discussion

5419.	During freezing, at the freezing point, the motion of particles will ___
Answer» During freezing, at the freezing point, the motion of particles will ___

Discussion

5420.	Name the metal which is used to make thin foils for packaging medicines, chocolates,and food items,etc.
Answer» Name the metal which is used to make thin foils for packaging medicines, chocolates,and food items,etc.

Discussion

5421.	Corrosion of iron can be prevented by :-
Answer» Corrosion of iron can be prevented by :-

Discussion

5422.	What do you mean by particulate
Answer» What do you mean by particulate

Discussion

5423.	Snake poison contains a mix of
Answer» Snake poison contains a mix of

Discussion

5424.	What Is the state of fire
Answer» What Is the state of fire

Discussion

5425.	The heat required to raise the temperature of a body by 1 °C is
Answer» The heat required to raise the temperature of a body by 1 °C is

Discussion

5426.	Define sublimation. [2 MARKS]
Answer» Define sublimation. [2 MARKS]

Discussion

5427.	The ionisation energy of elements _________, as we go down the group.
Answer» The ionisation energy of elements _________, as we go down the group.

Discussion

5428.	The amount of water vapour present in air is known as ___
Answer» The amount of water vapour present in air is known as ___

Discussion

5429.	Which symbol was used by Dalton to represent 'Carbon'?
Answer» Which symbol was used by Dalton to represent 'Carbon'?

Discussion

5430.	Which of the below-mentioned is/are the ways to save the earth?
Answer» Which of the below-mentioned is/are the ways to save the earth?

Discussion

5431.	Balance the following equation by short-cut method and write the coefficient for O2 C5H11NH2+O2→CO2+H2O+NO2___
Answer» Balance the following equation by short-cut method and write the coefficient for $O_{2}$ $C_{5} H_{11} N H_{2} + O_{2} \to C O_{2} + H_{2} O + N O_{2}$ ___

Discussion

5432.	Contamination is:
Answer» Contamination is:

Discussion

5433.	Which adjective in the following phrase indicates purpose? Father’s sparkling brand new reading glasses
Answer» Which adjective in the following phrase indicates purpose? Father’s sparkling brand new reading glasses

5433.

Which adjective in the following phrase indicates purpose? Father’s sparkling brand new reading glasses

Answer»

Which adjective in the following phrase indicates purpose?

Father’s sparkling brand new reading glasses

Discussion

5434.	Which of the following steps can be taken by an individual to help in water management?
Answer» Which of the following steps can be taken by an individual to help in water management?

Discussion

5435.	Which of the factors are responsible for the conversion of solid CO2 in vapours?
Answer» Which of the factors are responsible for the conversion of solid $C O_{2}$ in vapours?

Discussion

5436.	Mark as true or false . correct the false statements A) Acrylic fibres are resistant to moths and Chemicals B) copper objects get coated with brown substance called acidic copper carbonate
Answer» Mark as true or false . correct the false statements A) Acrylic fibres are resistant to moths and Chemicals B) copper objects get coated with brown substance called acidic copper carbonate

5436.

Mark as true or false . correct the false statements A) Acrylic fibres are resistant to moths and Chemicals B) copper objects get coated with brown substance called acidic copper carbonate

Answer»

Mark as true or false . correct the false statements

A) Acrylic fibres are resistant to moths and Chemicals

B) copper objects get coated with brown substance called acidic copper carbonate

Discussion

5437.	What are the properties of synthetic fibres
Answer» What are the properties of synthetic fibres

Discussion

5438.	Whenever a bottle of perfume is opened in a corner, we can receive its smell across the room. Choose the correct option(s) of what happens in this process.
Answer» Whenever a bottle of perfume is opened in a corner, we can receive its smell across the room. Choose the correct option(s) of what happens in this process.

Discussion

5439.	How many images involve a chemical change?2
Answer» How many images involve a chemical change? 2

Discussion

5440.	The phase transition in which a liquid turns into a solid is called as _______
Answer» The phase transition in which a liquid turns into a solid is called as _______

Discussion

5441.	Vacuum means ______ air pressure.
Answer» Vacuum means ______ air pressure.

Discussion

5442.	The following reaction is a/an – C+O2→CO2+Heat
Answer» The following reaction is a/an – $C + O_{2} \to C O_{2} + H e a t$

Discussion

5443.	Substances that are used to determine whether a particular substance is an acid or a base are called ___.
Answer» Substances that are used to determine whether a particular substance is an acid or a base are called ___.

Discussion

5444.	The polymers which are produced from natural polymers by synthesization are known as ___.
Answer» The polymers which are produced from natural polymers by synthesization are known as ___.

Discussion

5445.	Half - life of the reaction :H2O2(aq)→H2Oℓ+12O2(g) is independent of initial concentration of H2O2. Volume of O2 gas after 20 minutes is 5L at 1 atm and 27∘C, and after completion of the reaction 50 L. The rate constant is :
Answer» Half - life of the reaction : $H_{2} O_{2 (a q)} \to H_{2} O_{ℓ} + \frac{1}{2} O_{2 (g)}$ is independent of initial concentration of $H_{2} O_{2}$ . Volume of $O_{2}$ gas after 20 minutes is 5L at 1 atm and $27^{\circ} C$ , and after completion of the reaction 50 L. The rate constant is :

Discussion

5446.	State what is a chemical reaction. A chemical reaction is often accompanied by external indications or characteristics which includes 1.colour change 2.effervesence or gas evolved 3. Evolution or absorption of heat 4. Formation of precipitate. With reference to each of the above indications, State the external indications seen during - 1. Addition of dilute acid to an active metal 2. Addition of dilute hydrochloric acid to silver nitrate. 3. Addition of water to quicklime. 4. Thermal decomposition of mercury(ll) oxide
Answer» State what is a chemical reaction. A chemical reaction is often accompanied by external indications or characteristics which includes 1.colour change 2.effervesence or gas evolved 3. Evolution or absorption of heat 4. Formation of precipitate. With reference to each of the above indications, State the external indications seen during - 1. Addition of dilute acid to an active metal 2. Addition of dilute hydrochloric acid to silver nitrate. 3. Addition of water to quicklime. 4. Thermal decomposition of mercury(ll) oxide

Discussion

5447.	Which of the following is a thermosetting plastic?
Answer» Which of the following is a thermosetting plastic?

Discussion

5448.	What is the latin name of potassium?
Answer» What is the latin name of potassium?

Discussion

5449.	The colour of outer zone of a candle flame is ___.
Answer» The colour of outer zone of a candle flame is ___.

Discussion

5450.	How much acid should be added to 400 ml of 15% acid solution to increase its strength to 32%
Answer» How much acid should be added to 400 ml of 15% acid solution to increase its strength to 32%

Discussion

Explore topic-wise InterviewSolutions in .

(a) Describe the threat to Taj Mahal monument due to air pollution. (b) State any two ways of controlling air pollution.

C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + Δ The above reaction is _______ reaction.

Which of these water sources is a major source of freshwater?

Higher the calorific value the better the fuel. do you agree, justify.

Why the use of chlorofluorocarbons should be discouraged?

Describe the process of manufacturing rayon from wood pulp

What will be a, b and c for the following reaction to be balanced? aFeCl3+bMgO→cFe2O3+dMgCl2

Unlike graphite diamond doesn't conduct electricity. Why?

You might have seen that many plastic wrappers or goods come with a tag saying ' Do not burn', Can you think of the reason as to why it is so?

What do you mean by fuel efficiency? Write it's significance.

The molecules of solid have a high intermolecular force of attraction, even then the molecules don't diffuse into one another. Why?

The gas obtained by heating sulphur powder in air is dissolved in water and the resulting solution is reacted with litmus solution. Then we will observe? ​​​​​​

What are harmfull gases released when plastics are burnt? (A) Dioxin (C) Hydrogen Chloride (C) Carbon dieoxide (D) all the above

Why the cotton easily burns?

Give reasons : (a) A gas can fill the whole vessel in which it is enclosed. (b) What do you observe when barium chloride solution is mixed with sodium sulphate solution ?

Formation of Nitric Oxide is an___ reaction.

The non-metal which exists as solid at room temperature is __________.

A aqueous reaction in which an insoluble product (precipitate) is formed is called ___ reaction.

During freezing, at the freezing point, the motion of particles will ___

Name the metal which is used to make thin foils for packaging medicines, chocolates,and food items,etc.

Corrosion of iron can be prevented by :-

What do you mean by particulate

Snake poison contains a mix of

What Is the state of fire

The heat required to raise the temperature of a body by 1 °C is

Define sublimation. [2 MARKS]

The ionisation energy of elements _________, as we go down the group.

The amount of water vapour present in air is known as ___

Which symbol was used by Dalton to represent 'Carbon'?

Which of the below-mentioned is/are the ways to save the earth?

Balance the following equation by short-cut method and write the coefficient for O2 C5H11NH2+O2→CO2+H2O+NO2___

Contamination is:

Which adjective in the following phrase indicates purpose? Father’s sparkling brand new reading glasses

Which of the following steps can be taken by an individual to help in water management?

Which of the factors are responsible for the conversion of solid CO2 in vapours?

Mark as true or false . correct the false statements A) Acrylic fibres are resistant to moths and Chemicals B) copper objects get coated with brown substance called acidic copper carbonate

What are the properties of synthetic fibres

Whenever a bottle of perfume is opened in a corner, we can receive its smell across the room. Choose the correct option(s) of what happens in this process.

How many images involve a chemical change?2

The phase transition in which a liquid turns into a solid is called as _______

Vacuum means ______ air pressure.

The following reaction is a/an – C+O2→CO2+Heat

Substances that are used to determine whether a particular substance is an acid or a base are called ___.

The polymers which are produced from natural polymers by synthesization are known as ___.

Half - life of the reaction :H2O2(aq)→H2Oℓ+12O2(g) is independent of initial concentration of H2O2. Volume of O2 gas after 20 minutes is 5L at 1 atm and 27∘C, and after completion of the reaction 50 L. The rate constant is :

Which of the following is a thermosetting plastic?

What is the latin name of potassium?

The colour of outer zone of a candle flame is ___.

How much acid should be added to 400 ml of 15% acid solution to increase its strength to 32%

The gas obtained by heating sulphur powder in air is dissolved in water and the resulting solution is reacted with litmus solution. Then we will observe?