3275 + Interview Questions in Chemistry Page 15 InterviewSolution

701.	From which parts of the plant cotton and jute are obtained?
Answer» From which parts of the plant cotton and jute are obtained?

Discussion

702.	The following is an answer given by Boojho to a question asked by his teacher - “Cotton, wool, silk and jute are classified as natural fibres whereas nylon and polyester are classified as synthetic fibres.” Can you tell what question the teacher has asked?
Answer» The following is an answer given by Boojho to a question asked by his teacher - “Cotton, wool, silk and jute are classified as natural fibres whereas nylon and polyester are classified as synthetic fibres.” Can you tell what question the teacher has asked?

Discussion

703.	Write two uses and properties of Nylon.
Answer» Write two uses and properties of Nylon.

Discussion

704.	what is machenism of vision in dim light??
Answer» what is machenism of vision in dim light??

Discussion

705.	Q 1) what r d 3 actions that bring about changes in matter? Elucidate it with an example
Answer» Q 1) what r d 3 actions that bring about changes in matter? Elucidate it with an example

Discussion

706.	Why cscl have z=2 Technically It should be 4
Answer» Why cscl have z=2 Technically It should be 4

Discussion

707.	Draw a plan, front and side elevations of the following solids.
Answer» Draw a plan, front and side elevations of the following solids.

Discussion

708.	We have to separate a mixture into its constituents because only pure compounds are useful to us. Mixtures are not of much use. True of false?
Answer» We have to separate a mixture into its constituents because only pure compounds are useful to us. Mixtures are not of much use. True of false?

Discussion

709.	30. Air contains 79% N2 and 21% O2 by volume . The percentage by mass of nitrogen gas in the air is 1. 76.6% 2. 24% 3. 29% 4. 48%
Answer» 30. Air contains 79% N2 and 21% O2 by volume . The percentage by mass of nitrogen gas in the air is 1. 76.6% 2. 24% 3. 29% 4. 48%

Discussion

710.	In which process, fibres from a mass of cotton wool are drawn out and twisted to form a yarn?
Answer» In which process, fibres from a mass of cotton wool are drawn out and twisted to form a yarn?

Discussion

711.	An item that can be made from coconut fibre is:
Answer» An item that can be made from coconut fibre is:

Discussion

712.	How are atomicity and vapour density related to Avogadro's hypothesis?
Answer» How are atomicity and vapour density related to Avogadro's hypothesis?

Discussion

713.	___________ helps in the exchange of gases in the jar.
Answer» ___________ helps in the exchange of gases in the jar.

Discussion

714.	Question 6.Write any two differences between a chemical change and a physical change.
Answer» Question 6. Write any two differences between a chemical change and a physical change.

714.

Question 6.Write any two differences between a chemical change and a physical change.

Answer»

Question 6.

Write any two differences between a chemical change and a physical change.

Discussion

715.	What is tan theta
Answer» What is tan theta

Discussion

716.	The most acidic oxide. And why1)so32)p2o53)cl2o74)sio2
Answer» The most acidic oxide. And why 1)so3 2)p2o5 3)cl2o7 4)sio2

Discussion

717.	Question 3 The quantity of water required to produce one-page of your book is (a) one bucket (b) ten buckets (c) two glasses (d) few drops
Answer» Question 3 The quantity of water required to produce one-page of your book is (a) one bucket (b) ten buckets (c) two glasses (d) few drops

717.

Question 3 The quantity of water required to produce one-page of your book is (a) one bucket (b) ten buckets (c) two glasses (d) few drops

Answer»

Question 3

The quantity of water required to produce one-page of your book is
(a) one bucket
(b) ten buckets
(c) two glasses
(d) few drops

Discussion

718.	In the image given below, the artist has forgotten to put the labels and directions on the arrows. Mark the directions on the arrows and label the diagram using the following labels:Clouds, rain, atmosphere, carbon dioxide, oxygen, plants, animals, soil, roots, water table.
Answer» In the image given below, the artist has forgotten to put the labels and directions on the arrows. Mark the directions on the arrows and label the diagram using the following labels: Clouds, rain, atmosphere, carbon dioxide, oxygen, plants, animals, soil, roots, water table.

Discussion

719.	Which separation techniques will you apply for the separation of the following?a) Sodium chloride from its solution in water.b) Ammonium chloride from a mixture containing sodium chloride and ammonium chloride.c) Butter from curd.d) Oil from water.e) Wheat grains from husk.
Answer» Which separation techniques will you apply for the separation of the following? a) Sodium chloride from its solution in water. b) Ammonium chloride from a mixture containing sodium chloride and ammonium chloride. c) Butter from curd. d) Oil from water. e) Wheat grains from husk.

Discussion

720.	Give as many methods as you can for the following : (a) Separating light materials from grain. (2) Removing weevils from grain. (c) Picking out stones from grain. (d) Cleaning grain which has a lot of soil mixed in it. (e) Cleaning muddy water.
Answer» Give as many methods as you can for the following : (a) Separating light materials from grain. (2) Removing weevils from grain. (c) Picking out stones from grain. (d) Cleaning grain which has a lot of soil mixed in it. (e) Cleaning muddy water.

720.

Give as many methods as you can for the following : (a) Separating light materials from grain. (2) Removing weevils from grain. (c) Picking out stones from grain. (d) Cleaning grain which has a lot of soil mixed in it. (e) Cleaning muddy water.

Answer»

Give as many methods as you can for the following :

(a) Separating light materials from grain.

(2) Removing weevils from grain.

(c) Picking out stones from grain.

(d) Cleaning grain which has a lot of soil mixed in it.

(e) Cleaning muddy water.

Discussion

721.	18%(w/V) solution of urea is __M
Answer» 18%(w/V) solution of urea is __M

Discussion

722.	Why did the fish in the second jar die even after providing water and food?
Answer» Why did the fish in the second jar die even after providing water and food?

Discussion

723.	What are the three states of matter? Give examples for each state. [3 MARKS]
Answer» What are the three states of matter? Give examples for each state. [3 MARKS]

Discussion

724.	Question 2 (b)(b) Comment upon the following: rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy and density
Answer» Question 2 (b) (b) Comment upon the following: rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy and density

Discussion

725.	8.Sn1 and sn2 are preferable in which type of solvent and why
Answer» 8.Sn1 and sn2 are preferable in which type of solvent and why

Discussion

726.	You must have seen the garbage collectors. What is the primary method of separation?
Answer» You must have seen the garbage collectors. What is the primary method of separation?

Discussion

727.	110.It takes 10 minutes to cool a liquid from 61^°C to 59^°C. If room temperature is 30^°C then time taken in cooling from 51^°C to 49^°C
Answer» 110.It takes 10 minutes to cool a liquid from 61^°C to 59^°C. If room temperature is 30^°C then time taken in cooling from 51^°C to 49^°C

Discussion

728.	Explain the physical properties of water
Answer» Explain the physical properties of water

Discussion

729.	Why do we wear clothes?
Answer» Why do we wear clothes?

Discussion

730.	Which of these is not a fibre?(a) jute(b) nylon(c) leather(d) wool
Answer» Which of these is not a fibre? (a) jute (b) nylon (c) leather (d) wool

Discussion

731.	How pressure affects sound
Answer» How pressure affects sound

Discussion

732.	10. Assertion (A) AU=-qReason (R) No work is done on the system, butq amount of heat is taken out from the system and s kgiven to the surrounding.A
Answer» 10. Assertion (A) AU=-qReason (R) No work is done on the system, butq amount of heat is taken out from the system and s kgiven to the surrounding.A

Discussion

733.	Name some natural clothing materials obtained from plants and animals?
Answer» Name some natural clothing materials obtained from plants and animals?

Discussion

734.	Question 33Fractional distillation is suitable for separation of miscible liquids with a boiling point difference of about 25 K or less. What part of fractional distillation apparatus makes it efficient and possess an advantage over a simple distillation process. Explain using a diagram.
Answer» Question 33 Fractional distillation is suitable for separation of miscible liquids with a boiling point difference of about 25 K or less. What part of fractional distillation apparatus makes it efficient and possess an advantage over a simple distillation process. Explain using a diagram.

Discussion

735.	What are the differences between compounds and mixtures?
Answer» What are the differences between compounds and mixtures?

Discussion

736.	42.In wHich solution phospOrus is stored and why
Answer» 42.In wHich solution phospOrus is stored and why

Discussion

737.	A cobbler wanted to sew a shoe using a thread made of strong fibre. Which fibre would you suggest to the cobbler? Mention three other properties of that fibre.
Answer» A cobbler wanted to sew a shoe using a thread made of strong fibre. Which fibre would you suggest to the cobbler? Mention three other properties of that fibre.

Discussion

738.	The process by which a solid directly converts into its vapour state is called ___ .
Answer» The process by which a solid directly converts into its vapour state is called ___ .

Discussion

739.	What happens when sugar is heated? What kind of change is it? [2 MARKS]
Answer» What happens when sugar is heated? What kind of change is it? [2 MARKS]

Discussion

740.	What is the difference between transparent and opaque objects? Give two examples of each.
Answer» What is the difference between transparent and opaque objects? Give two examples of each.

Discussion

741.	The removal of iron nails from a pile of dust can be achieved by the process of ___.
Answer» The removal of iron nails from a pile of dust can be achieved by the process of ___.

Discussion

742.	What kind of change is cooking of food? Why?
Answer» What kind of change is cooking of food? Why?

Discussion

743.	Explain: Precipitation of water.
Answer» Explain: Precipitation of water.

Discussion

744.	How will you separate water and petrol from their mixture?
Answer» How will you separate water and petrol from their mixture?

Discussion

745.	What are greenhouse gases?
Answer» What are greenhouse gases?

Discussion

746.	Classify the following as slow and fast change. Rusting of iron Germination of seed Cooking of food Curdling of milk Lightning of bulb Burning of paper
Answer» Classify the following as slow and fast change. Rusting of iron Germination of seed Cooking of food Curdling of milk Lightning of bulb Burning of paper

746.

Classify the following as slow and fast change. Rusting of iron Germination of seed Cooking of food Curdling of milk Lightning of bulb Burning of paper

Answer»

Classify the following as slow and fast change.

Rusting of iron

Germination of seed

Cooking of food

Curdling of milk

Lightning of bulb

Burning of paper

Discussion

747.	10. What is sedimentation and chlorination ?
Answer» 10. What is sedimentation and chlorination ?

Discussion

748.	23. Freezing point of 0.1 M solution of glucose is -1.86^° c. If equal volume of.3 M glucose solution is added, freezing point of mixture?
Answer» 23. Freezing point of 0.1 M solution of glucose is -1.86^° c. If equal volume of.3 M glucose solution is added, freezing point of mixture?

Discussion

749.	The process through which Naphthalene balls disappear with time without leaving any solid residue is called________
Answer» The process through which Naphthalene balls disappear with time without leaving any solid residue is called________

Discussion

750.	What are the uses of water in various activities?
Answer» What are the uses of water in various activities?

Discussion

Explore topic-wise InterviewSolutions in .

From which parts of the plant cotton and jute are obtained?​

The following is an answer given by Boojho to a question asked by his teacher - “Cotton, wool, silk and jute are classified as natural fibres whereas nylon and polyester are classified as synthetic fibres.” ​Can you tell what question the teacher has asked?​

Write two uses and properties of Nylon.

what is machenism of vision in dim light??

Q 1) what r d 3 actions that bring about changes in matter? Elucidate it with an example

Why cscl have z=2 Technically It should be 4

Draw a plan, front and side elevations of the following solids.

We have to separate a mixture into its constituents because only pure compounds are useful to us. Mixtures are not of much use. True of false?

30. Air contains 79% N2 and 21% O2 by volume . The percentage by mass of nitrogen gas in the air is 1. 76.6% 2. 24% 3. 29% 4. 48%

In which process, fibres from a mass of cotton wool are drawn out and twisted to form a yarn?

An item that can be made from coconut fibre is:

How are atomicity and vapour density related to Avogadro's hypothesis?

___________ helps in the exchange of gases in the jar.

Question 6.Write any two differences between a chemical change and a physical change.

What is tan theta

The most acidic oxide. And why1)so32)p2o53)cl2o74)sio2

Question 3 The quantity of water required to produce one-page of your book is (a) one bucket (b) ten buckets (c) two glasses (d) few drops

In the image given below, the artist has forgotten to put the labels and directions on the arrows. Mark the directions on the arrows and label the diagram using the following labels:Clouds, rain, atmosphere, carbon dioxide, oxygen, plants, animals, soil, roots, water table.

Which separation techniques will you apply for the separation of the following?a) Sodium chloride from its solution in water.b) Ammonium chloride from a mixture containing sodium chloride and ammonium chloride.c) Butter from curd.d) Oil from water.e) Wheat grains from husk.

Give as many methods as you can for the following : (a) Separating light materials from grain. (2) Removing weevils from grain. (c) Picking out stones from grain. (d) Cleaning grain which has a lot of soil mixed in it. (e) Cleaning muddy water.

18%(w/V) solution of urea is __M

Why did the fish in the second jar die even after providing water and food?

What are the three states of matter? Give examples for each state. [3 MARKS]

Question 2 (b)(b) Comment upon the following: rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy and density

8.Sn1 and sn2 are preferable in which type of solvent and why

You must have seen the garbage collectors. What is the primary method of separation?

110.It takes 10 minutes to cool a liquid from 61^°C to 59^°C. If room temperature is 30^°C then time taken in cooling from 51^°C to 49^°C

Explain the physical properties of water

Why do we wear clothes?

Which of these is not a fibre?(a) jute(b) nylon(c) leather(d) wool

How pressure affects sound

10. Assertion (A) AU=-qReason (R) No work is done on the system, butq amount of heat is taken out from the system and s kgiven to the surrounding.A

Name some natural clothing materials obtained from plants and animals?

Question 33Fractional distillation is suitable for separation of miscible liquids with a boiling point difference of about 25 K or less. What part of fractional distillation apparatus makes it efficient and possess an advantage over a simple distillation process. Explain using a diagram.

What are the differences between compounds and mixtures?

42.In wHich solution phospOrus is stored and why

A cobbler wanted to sew a shoe using a thread made of strong fibre. Which fibre would you suggest to the cobbler? Mention three other properties of that fibre.

The process by which a solid directly converts into its vapour state is called ___ .

What happens when sugar is heated? What kind of change is it? [2 MARKS]

What is the difference between transparent and opaque objects? Give two examples of each.

The removal of iron nails from a pile of dust can be achieved by the process of ___.

What kind of change is cooking of food? Why?

Explain: Precipitation of water.

How will you separate water and petrol from their mixture?

What are greenhouse gases?

Classify the following as slow and fast change. Rusting of iron Germination of seed Cooking of food Curdling of milk Lightning of bulb Burning of paper

10. What is sedimentation and chlorination ?

23. Freezing point of 0.1 M solution of glucose is -1.86^° c. If equal volume of.3 M glucose solution is added, freezing point of mixture?

The process through which Naphthalene balls disappear with time without leaving any solid residue is called________

What are the uses of water in various activities?

From which parts of the plant cotton and jute are obtained?

The following is an answer given by Boojho to a question asked by his teacher - “Cotton, wool, silk and jute are classified as natural fibres whereas nylon and polyester are classified as synthetic fibres.” Can you tell what question the teacher has asked?