5083 + Interview Questions in Chemistry Page 81 InterviewSolution

4001.	Subscripts in the chemical formula X2Y3 denote: A. 2 atoms of X combine with 3 atoms of Y to form X2Y3 B.The subscript 2 denotes that valency of X is 2.
Answer» Subscripts in the chemical formula X₂Y₃denote: A. 2 atoms of X combine with 3 atoms of Y to form X₂Y₃ B.The subscript 2 denotes that valency of X is 2.

4001.

Subscripts in the chemical formula X2Y3 denote: A. 2 atoms of X combine with 3 atoms of Y to form X2Y3 B.The subscript 2 denotes that valency of X is 2.

Answer»

Subscripts in the chemical formula X₂Y₃denote:

A. 2 atoms of X combine with 3 atoms of Y to form X₂Y₃

B.The subscript 2 denotes that valency of X is 2.

Discussion

4002.	Give reason for the statement (I) Water droplets appear on the outer surface of a glass full of cold water?Why.
Answer» Give reason for the statement (I) Water droplets appear on the outer surface of a glass full of cold water?Why.

4002.

Give reason for the statement (I) Water droplets appear on the outer surface of a glass full of cold water?Why.

Answer»

Give reason for the statement

(I) Water droplets appear on the outer surface of a glass full of cold water?Why.

Discussion

4003.	Choose the correct statement for aluminum.
Answer» Choose the correct statement for aluminum.

Discussion

4004.	Which of the following is not considered as an indicator?
Answer» Which of the following is not considered as an indicator?

Discussion

4005.	Which of the following is the correct order of stages in the life cycle of silk moth?
Answer» Which of the following is the correct order of stages in the life cycle of silk moth?

Discussion

4006.	Following figure shows ____ change.
Answer» Following figure shows ____ change.

4006.

Following figure shows ____ change.

Answer»

Following figure shows ____ change.

Discussion

4007.	Which of the following is the chemical formula of Baking soda?
Answer» Which of the following is the chemical formula of Baking soda?

4007.

Which of the following is the chemical formula of Baking soda?

Answer»

Which of the following is the chemical formula of Baking soda?

Discussion

4008.	You have hydrochloric acid in a beaker and you want to perform the experiment of neutralization. Which among the following can you use?
Answer» You have hydrochloric acid in a beaker and you want to perform the experiment of neutralization. Which among the following can you use?

Discussion

4009.	Antacids are neutralising agents for the stomach as it contains a/an ______.
Answer» Antacids are neutralising agents for the stomach as it contains a/an ______.

Discussion

4010.	Question 8 Choose the correct option. The total water (i) in the lakes and rivers of the world remains constant. (ii) under the ground remains constant. (iii) in the seas and oceans of the world remains constant. (iv) of the world remains constant.
Answer» Question 8 Choose the correct option. The total water (i) in the lakes and rivers of the world remains constant. (ii) under the ground remains constant. (iii) in the seas and oceans of the world remains constant. (iv) of the world remains constant.

Discussion

4011.	Which following fibre is an example of synthetic fibre?
Answer» Which following fibre is an example of synthetic fibre?

Discussion

4012.	Garbage consists of the things we use in our daily life. During its use, it does not smell. Why is it that when it is discarded, piled up and termed as garbage it stinks?
Answer» Garbage consists of the things we use in our daily life. During its use, it does not smell. Why is it that when it is discarded, piled up and termed as garbage it stinks?

Discussion

4013.	During the manufacturing of soap, perfumes are added for
Answer» During the manufacturing of soap, perfumes are added for

Discussion

4014.	The chemical name of water is ___.
Answer» The chemical name of water is ___.

Discussion

4015.	Take a handful of soil from a nearby garden and mix it in a clear glass partially filled with water. Stir the mixture and leave it undisturbed. What do the different layers obtained after the mixture has settled down prove?
Answer» Take a handful of soil from a nearby garden and mix it in a clear glass partially filled with water. Stir the mixture and leave it undisturbed. What do the different layers obtained after the mixture has settled down prove?

Discussion

4016.	Suggest some ways to prevent rusting of iron objects
Answer» Suggest some ways to prevent rusting of iron objects

Discussion

4017.	Natural Indicators turn acids which colour
Answer» Natural Indicators turn acids which colour

Discussion

4018.	What is the percentage range of Carbon dioxide in the atmosphere of the earth?
Answer» What is the percentage range of Carbon dioxide in the atmosphere of the earth?

Discussion

4019.	Sushweta got bitten by an ant and started feeling a burning sensation. She immediately rushed to the kitchen to find something that can reduce the burning sensation. Which of the following(s) could be used by her?
Answer» Sushweta got bitten by an ant and started feeling a burning sensation. She immediately rushed to the kitchen to find something that can reduce the burning sensation. Which of the following(s) could be used by her?

Discussion

4020.	Name a strong base and weak base
Answer» Name a strong base and weak base

Discussion

4021.	Question 1 State three differences between acids and bases.
Answer» Question 1 State three differences between acids and bases.

Discussion

4022.	The appearance of rust is like ______ flaky substance.
Answer» The appearance of rust is like ______ flaky substance.

Discussion

4023.	While measuring temperature of boiling water,Susweta found the temperature to be 85°C only. What can be the probable reason for this?
Answer» While measuring temperature of boiling water,Susweta found the temperature to be 85°C only. What can be the probable reason for this?

Discussion

4024.	State three difference between mass and weight
Answer» State three difference between mass and weight

Discussion

4025.	Take a block of ice in a 20 cm<3 of beaker.heat it.what is the change observed.continue heating till water begins to boil.observe that water level decreases.what can we conclude ???
Answer» Take a block of ice in a 20 cm<3 of beaker.heat it.what is the change observed.continue heating till water begins to boil.observe that water level decreases.what can we conclude ???

Discussion

4026.	What are burrs?
Answer» What are burrs?

Discussion

4027.	Give one example each of manmade and natural fibre. [2 MARKS]
Answer» Give one example each of manmade and natural fibre. [2 MARKS]

Discussion

4028.	Under the same reaction conditions, initial concentration of 1.386 mol dm−3 of a substance becomes half in 40 s amd 20 s through first order and zero order kinetics respectively. Ratio (k1k0) of the rate constants for first order (k1) and zero order (k0) of the reaction is:
Answer» Under the same reaction conditions, initial concentration of 1.386 $m o l d m^{- 3}$ of a substance becomes half in 40 s amd 20 s through first order and zero order kinetics respectively. Ratio $(\frac{k_{1}}{k_{0}})$ of the rate constants for first order $(k_{1})$ and zero order $(k_{0})$ of the reaction is:

Discussion

4029.	The expiry date on the water bottle is for the bottle and not for for water but the bottles are usually made from plastic and plastic does not decompose. Then why expiry date for bottle?
Answer» The expiry date on the water bottle is for the bottle and not for for water but the bottles are usually made from plastic and plastic does not decompose. Then why expiry date for bottle?

Discussion

4030.	The alloy of mercury is called___.
Answer» The alloy of mercury is called___.

Discussion

4031.	What would happen when a red litmus paper is treated with a solution containing NaOH? [2 MARKS]
Answer» What would happen when a red litmus paper is treated with a solution containing NaOH? [2 MARKS]

Discussion

4032.	Which of the following can act as the acid-base indicator?
Answer» Which of the following can act as the acid-base indicator?

Discussion

4033.	What will happen if forests disappear? [5 MARKS]
Answer» What will happen if forests disappear? [5 MARKS]

Discussion

4034.	Which of the following are examples of chemical reactions? i. Burning of wood ii. Cutting of wood iii. Coversion of steam to water iv. Rusting of almirah v. Dissolving common salt in water
Answer» Which of the following are examples of chemical reactions? i. Burning of wood ii. Cutting of wood iii. Coversion of steam to water iv. Rusting of almirah v. Dissolving common salt in water

4034.

Which of the following are examples of chemical reactions? i. Burning of wood ii. Cutting of wood iii. Coversion of steam to water iv. Rusting of almirah v. Dissolving common salt in water

Answer»

Which of the following are examples of chemical reactions?

i. Burning of wood

ii. Cutting of wood

iii. Coversion of steam to water

iv. Rusting of almirah

v. Dissolving common salt in water

Discussion

4035.	Mention the essential material (chemicals) to prepare soap in the laboratory. Describe in brief the test of determining the nature (acidic/alkaline) of the reaction mixture of saponification reaction.
Answer» Mention the essential material (chemicals) to prepare soap in the laboratory. Describe in brief the test of determining the nature (acidic/alkaline) of the reaction mixture of saponification reaction.

Discussion

4036.	Deciduous trees are found in
Answer» Deciduous trees are found in

Discussion

4037.	In addition to rock particles uncontaminated soil also contains________.
Answer» In addition to rock particles uncontaminated soil also contains________.

Discussion

4038.	Question 21 Complete the paragraph related to the life history of silk moth by filling in the blanks. The (a) ___ silk moth lays (b) ___, from which hatch (c) ___ called (d) ___ or (e) ___. They grow in size and when the caterpillar is ready to enter the next stage of its life history called (f) ____, it first weaves a covering to hold itself, which is known as (g) ____.
Answer» Question 21 Complete the paragraph related to the life history of silk moth by filling in the blanks. The (a) ___ silk moth lays (b) ___, from which hatch (c) ___ called (d) ___ or (e) ___. They grow in size and when the caterpillar is ready to enter the next stage of its life history called (f) ____, it first weaves a covering to hold itself, which is known as (g) ____.

4038.

Question 21 Complete the paragraph related to the life history of silk moth by filling in the blanks. The (a) _ silk moth lays (b) _, from which hatch (c) _ called (d) _ or (e) _. They grow in size and when the caterpillar is ready to enter the next stage of its life history called (f) , it first weaves a covering to hold itself, which is known as (g) __.

Answer»

Question 21

Complete the paragraph related to the life history of silk moth by filling in the blanks.

The (a) ___ silk moth lays (b) ___, from which hatch (c) ___ called (d) ___ or (e) ___. They grow in size and when the caterpillar is ready to enter the next stage of its life history called (f) ____, it first weaves a covering to hold itself, which is known as (g) ____.

Discussion

4039.	Statement 1: Nitrogen and hydrogen combine together to form ammonia. Statement 2: It is an exothermic reaction.
Answer» Statement 1: Nitrogen and hydrogen combine together to form ammonia. Statement 2: It is an exothermic reaction.

Discussion

4040.	Why do whales and dolphins come up to the surface of water and releasea fountain of water?
Answer» Why do whales and dolphins come up to the surface of water and releasea fountain of water?

Discussion

4041.	Non-metals generally react with oxygen to form:
Answer» Non-metals generally react with oxygen to form:

Discussion

4042.	Write Short note on BEC and plasma.
Answer» Write Short note on BEC and plasma.

Discussion

4043.	If a drop of China rose indicator is added to soap solutions, what will be the change in colour of China rose?
Answer» If a drop of China rose indicator is added to soap solutions, what will be the change in colour of China rose?

Discussion

4044.	A bond with maximum covalent character is found between:
Answer» A bond with maximum covalent character is found between:

Discussion

4045.	Rate of diffusion across cell membrane depends upon
Answer» Rate of diffusion across cell membrane depends upon

Discussion

4046.	What is global warming what should be done to stop global warming . Tell answer in points
Answer» What is global warming what should be done to stop global warming . Tell answer in points

Discussion

4047.	What are the properties of suspension? [3 MARKS]
Answer» What are the properties of suspension? [3 MARKS]

Discussion

4048.	Which would lose water by transpiration faster a plant growing in direct sunlight or a plant growing in shade? Why?
Answer» Which would lose water by transpiration faster a plant growing in direct sunlight or a plant growing in shade? Why?

Discussion

4049.	What is the difference between Mass and Weight , three points. Sir, it is urgent.
Answer» What is the difference between Mass and Weight , three points. Sir, it is urgent.

Discussion

4050.	‘Ozone-hole’ is defined as:
Answer» ‘Ozone-hole’ is defined as:

Discussion

Explore topic-wise InterviewSolutions in .

Subscripts in the chemical formula X2Y3 denote: A. 2 atoms of X combine with 3 atoms of Y to form X2Y3 B.The subscript 2 denotes that valency of X is 2.

Give reason for the statement (I) Water droplets appear on the outer surface of a glass full of cold water?Why.

Choose the correct statement for aluminum.

Which of the following is not considered as an indicator?

Which of the following is the correct order of stages in the life cycle of silk moth?

Following figure shows ____ change.

Which of the following is the chemical formula of Baking soda?

You have hydrochloric acid in a beaker and you want to perform the experiment of neutralization. Which among the following can you use?

Antacids are neutralising agents for the stomach as it contains a/an ______.

Question 8 Choose the correct option. The total water (i) in the lakes and rivers of the world remains constant. (ii) under the ground remains constant. (iii) in the seas and oceans of the world remains constant. (iv) of the world remains constant.

Which following fibre is an example of synthetic fibre?

Garbage consists of the things we use in our daily life. During its use, it does not smell. Why is it that when it is discarded, piled up and termed as garbage it stinks?

During the manufacturing of soap, perfumes are added for

The chemical name of water is ___.

Take a handful of soil from a nearby garden and mix it in a clear glass partially filled with water. Stir the mixture and leave it undisturbed. What do the different layers obtained after the mixture has settled down prove?

Suggest some ways to prevent rusting of iron objects

Natural Indicators turn acids which colour

What is the percentage range of Carbon dioxide in the atmosphere of the earth?

Sushweta got bitten by an ant and started feeling a burning sensation. She immediately rushed to the kitchen to find something that can reduce the burning sensation. Which of the following(s) could be used by her?

Name a strong base and weak base

Question 1 State three differences between acids and bases.

The appearance of rust is like ______ flaky substance.

While measuring temperature of boiling water,Susweta found the temperature to be 85°C only. What can be the probable reason for this?

State three difference between mass and weight

Take a block of ice in a 20 cm&lt;3 of beaker.heat it.what is the change observed.continue heating till water begins to boil.observe that water level decreases.what can we conclude ???

What are burrs?

Give one example each of manmade and natural fibre. [2 MARKS]

Under the same reaction conditions, initial concentration of 1.386 mol dm−3 of a substance becomes half in 40 s amd 20 s through first order and zero order kinetics respectively. Ratio (k1k0) of the rate constants for first order (k1) and zero order (k0) of the reaction is:

The expiry date on the water bottle is for the bottle and not for for water but the bottles are usually made from plastic and plastic does not decompose. Then why expiry date for bottle?

The alloy of mercury is called___.

What would happen when a red litmus paper is treated with a solution containing NaOH? [2 MARKS]

Which of the following can act as the acid-base indicator?

What will happen if forests disappear? [5 MARKS]

Which of the following are examples of chemical reactions? i. Burning of wood ii. Cutting of wood iii. Coversion of steam to water iv. Rusting of almirah v. Dissolving common salt in water

Mention the essential material (chemicals) to prepare soap in the laboratory. Describe in brief the test of determining the nature (acidic/alkaline) of the reaction mixture of saponification reaction.

Deciduous trees are found in

In addition to rock particles uncontaminated soil also contains________.

Statement 1: Nitrogen and hydrogen combine together to form ammonia. Statement 2: It is an exothermic reaction.

Why do whales and dolphins come up to the surface of water and releasea fountain of water?

Non-metals generally react with oxygen to form:

Write Short note on BEC and plasma.

If a drop of China rose indicator is added to soap solutions, what will be the change in colour of China rose?

A bond with maximum covalent character is found between:

Rate of diffusion across cell membrane depends upon

What is global warming what should be done to stop global warming . Tell answer in points

What are the properties of suspension? [3 MARKS]

Which would lose water by transpiration faster a plant growing in direct sunlight or a plant growing in shade? Why?

What is the difference between Mass and Weight , three points. Sir, it is urgent.

‘Ozone-hole’ is defined as:

Take a block of ice in a 20 cm<3 of beaker.heat it.what is the change observed.continue heating till water begins to boil.observe that water level decreases.what can we conclude ???