3275 + Interview Questions in Chemistry Page 18 InterviewSolution

851.	What is carbonated water and its uses?
Answer» What is carbonated water and its uses?

Discussion

852.	3.A simple electric motor has an armature resistance of 1ohm and runs from d.c. source of 12V . It draws current of 2A when unloaded. When a certain load is connected to it, its speed reduces by 10% of its initial value. The current draws by the loaded motor is
Answer» 3.A simple electric motor has an armature resistance of 1ohm and runs from d.c. source of 12V . It draws current of 2A when unloaded. When a certain load is connected to it, its speed reduces by 10% of its initial value. The current draws by the loaded motor is

Discussion

853.	Which method will you use to separate the substances in each of the following mixtures? (a) water + alum (b) camphor + sand (c) water + soil (d) tea + tea leaves.
Answer» Which method will you use to separate the substances in each of the following mixtures? (a) water + alum (b) camphor + sand (c) water + soil (d) tea + tea leaves.

853.

Which method will you use to separate the substances in each of the following mixtures? (a) water + alum (b) camphor + sand (c) water + soil (d) tea + tea leaves.

Answer»

Which method will you use to separate the substances in each of the following mixtures?

(a) water + alum

(b) camphor + sand

(c) water + soil

(d) tea + tea leaves.

Discussion

854.	Names two metals that can displace hydrogen from an H2SO4.
Answer» Names two metals that can displace hydrogen from an $H_{2} S O_{4}$ .

Discussion

855.	What is rubber? Name some common objects that are made of rubber.
Answer» What is rubber? Name some common objects that are made of rubber.

Discussion

856.	Question 2 (a) State for the following whether it is due to evaporation or condensation: Water drops appear on the outer surface of a glass containing cold water.
Answer» Question 2 (a) State for the following whether it is due to evaporation or condensation: Water drops appear on the outer surface of a glass containing cold water.

856.

Question 2 (a) State for the following whether it is due to evaporation or condensation: Water drops appear on the outer surface of a glass containing cold water.

Answer»

Question 2 (a)

State for the following whether it is due to evaporation or condensation:
Water drops appear on the outer surface of a glass containing cold water.

Discussion

857.	The process of conversion of ice into a liquid is known as:
Answer» The process of conversion of ice into a liquid is known as:

Discussion

858.	What is red lead and it's uses ?
Answer» What is red lead and it's uses ?

Discussion

859.	29. Natural and artificial fabrics
Answer» 29. Natural and artificial fabrics

Discussion

860.	Which of the following correctly shows the process of weaving?
Answer» Which of the following correctly shows the process of weaving?

Discussion

861.	In which of the following examples the change in state of a substance is observed?(i) Melting of chocolate(ii) Boiling of water(iii) Cutting of vegetables(iv) Pouring of milk in tea
Answer» In which of the following examples the change in state of a substance is observed? (i) Melting of chocolate (ii) Boiling of water (iii) Cutting of vegetables (iv) Pouring of milk in tea

Discussion

862.	Continuous use of chemical fertilizers can make the soil ___.
Answer» Continuous use of chemical fertilizers can make the soil ___.

Discussion

863.	The process of removing fleece from the sheep's body is known as ________.
Answer» The process of removing fleece from the sheep's body is known as ________.

Discussion

864.	What is chlorination in wastewater treatment?
Answer» What is chlorination in wastewater treatment?

Discussion

865.	What will happen when we mix sugar in a glass of water? What is this property called? [2 MARKS]
Answer» What will happen when we mix sugar in a glass of water? What is this property called? [2 MARKS]

Discussion

866.	what is the value of 1j in cgs units
Answer» what is the value of 1j in cgs units

Discussion

867.	The component of air used by green plants to make their food is ___ .
Answer» The component of air used by green plants to make their food is ___ .

Discussion

868.	What is winnowing?
Answer» What is winnowing?

Discussion

869.	What is the difference between sedimentation and decantation?
Answer» What is the difference between sedimentation and decantation?

Discussion

870.	Out of the following, which gas is not present in the air in abundance?
Answer» Out of the following, which gas is not present in the air in abundance?

Discussion

871.	Which soil among the following would you expect to have the highest percolation rate?
Answer» Which soil among the following would you expect to have the highest percolation rate?

Discussion

872.	The state of matter which has a definite shape but no definite volume is(a) solid.(b) liquid.(c) gas.(d) none of these
Answer» The state of matter which has a definite shape but no definite volume is (a) solid. (b) liquid. (c) gas. (d) none of these

Discussion

873.	Which of the following is an example of exhaustible natural resources?
Answer» Which of the following is an example of exhaustible natural resources?

Discussion

874.	Question 15 Give one example in each case. Change which occurs on heating but can be reversed. Change which occurs on heating but cannot be reversed. Change which occurs on cooling but can be reversed. Change which occurs on mixing two substances but can be reversed. Change which occurs on mixing two substances but cannot be reversed.
Answer» Question 15 Give one example in each case. Change which occurs on heating but can be reversed. Change which occurs on heating but cannot be reversed. Change which occurs on cooling but can be reversed. Change which occurs on mixing two substances but can be reversed. Change which occurs on mixing two substances but cannot be reversed.

874.

Question 15 Give one example in each case. Change which occurs on heating but can be reversed. Change which occurs on heating but cannot be reversed. Change which occurs on cooling but can be reversed. Change which occurs on mixing two substances but can be reversed. Change which occurs on mixing two substances but cannot be reversed.

Answer»

Question 15

Give one example in each case.
Change which occurs on heating but can be reversed.
Change which occurs on heating but cannot be reversed.
Change which occurs on cooling but can be reversed.
Change which occurs on mixing two substances but can be reversed.
Change which occurs on mixing two substances but cannot be reversed.

Discussion

875.	Why is germination of a seed a chemical change ?
Answer» Why is germination of a seed a chemical change ?

Discussion

876.	why are gases show more randomness than liquids and solids
Answer» why are gases show more randomness than liquids and solids

Discussion

877.

Classify the following substances given in the table into elements and compounds. Cu, CaCO3, Zn, H2O, Na, C

Answer» Classify the following substances given in the table into elements and compounds.

Cu,

C a C O_{3}

, Zn,

H_{2} O

, Na, C

Discussion

878.	What is the Water Cycle?
Answer» What is the Water Cycle?

Discussion

879.	What is scientific notation?
Answer» What is scientific notation?

Discussion

880.	What happens when the temperature of a saturated solution is raised?
Answer» What happens when the temperature of a saturated solution is raised?

Discussion

881.	Statement 1: Mangoes can be plucked from the trees but the grain seeds of plants like maize cannot be plucked from their stalks.Statement 2: Grain seeds of maize are very much bigger in size as compared to their stalks.
Answer» Statement 1: Mangoes can be plucked from the trees but the grain seeds of plants like maize cannot be plucked from their stalks. Statement 2: Grain seeds of maize are very much bigger in size as compared to their stalks.

881.

Statement 1: Mangoes can be plucked from the trees but the grain seeds of plants like maize cannot be plucked from their stalks.Statement 2: Grain seeds of maize are very much bigger in size as compared to their stalks.

Answer»

Statement 1: Mangoes can be plucked from the trees but the grain seeds of plants like maize cannot be plucked from their stalks.

Statement 2: Grain seeds of maize are very much bigger in size as compared to their stalks.

Discussion

882.	The S.I. unit of density is .
Answer» The S.I. unit of density is .

Discussion

883.	Which among the following cannot be used to spread over the wire mesh?
Answer» Which among the following cannot be used to spread over the wire mesh?

Discussion

884.	Explain the phenomenon of scattering of light. State the factors on which colours of scaterring light depends.
Answer» Explain the phenomenon of scattering of light. State the factors on which colours of scaterring light depends.

Discussion

885.	What temperature will a doctor’s thermometer show if placed in ice?
Answer» What temperature will a doctor’s thermometer show if placed in ice?

Discussion

886.	Namita noticed that the LPG gas stove in her kitchen was giving out yellow flame and blackening the utensils. She cleaned the stove burners. The flame then became blue and stopped blackening the utensils. She explained to her parents that the stove was not burning efficiently and wasting fuel because it was dirty. What values did Namita Show?
Answer» Namita noticed that the LPG gas stove in her kitchen was giving out yellow flame and blackening the utensils. She cleaned the stove burners. The flame then became blue and stopped blackening the utensils. She explained to her parents that the stove was not burning efficiently and wasting fuel because it was dirty. What values did Namita Show?

Discussion

887.	Out of the following options, which group of substances is made from the same material?
Answer» Out of the following options, which group of substances is made from the same material?

Discussion

888.	Name the method that can be used for separating the following mixture:(i) Sand and husk(ii) Wheat, sugar and stalk(iii) Water and petrol(iv) Rice and salt
Answer» Name the method that can be used for separating the following mixture: (i) Sand and husk (ii) Wheat, sugar and stalk (iii) Water and petrol (iv) Rice and salt

888.

Name the method that can be used for separating the following mixture:(i) Sand and husk(ii) Wheat, sugar and stalk(iii) Water and petrol(iv) Rice and salt

Answer»

Name the method that can be used for separating the following mixture:

(i) Sand and husk

(ii) Wheat, sugar and stalk

(iii) Water and petrol

(iv) Rice and salt

Discussion

889.	Why is the image of the engine evoked by the poet?
Answer» Why is the image of the engine evoked by the poet?

Discussion

890.	Do you think it was necessary for them to take these decisions? Why?
Answer» Do you think it was necessary for them to take these decisions? Why?

Discussion

891.	what is lattice energ
Answer» what is lattice energ

Discussion

892.	Give reason how is interconversion of states of matter different from a chemical reaction. Answer in two to three lines.
Answer» Give reason how is interconversion of states of matter different from a chemical reaction. Answer in two to three lines.

Discussion

893.	Give reasons why : (a) Waste water should not be allowed to stagnate in puddles. (b) Waste water from a factory should not be allowed to mix with drinking water. (c) Rubber, plastic should not be burnt. (d) The quantity and types of garbage generated have increased.
Answer» Give reasons why : (a) Waste water should not be allowed to stagnate in puddles. (b) Waste water from a factory should not be allowed to mix with drinking water. (c) Rubber, plastic should not be burnt. (d) The quantity and types of garbage generated have increased.

893.

Give reasons why : (a) Waste water should not be allowed to stagnate in puddles. (b) Waste water from a factory should not be allowed to mix with drinking water. (c) Rubber, plastic should not be burnt. (d) The quantity and types of garbage generated have increased.

Answer»

Give reasons why :

(a) Waste water should not be allowed to stagnate in puddles.

(b) Waste water from a factory should not be allowed to mix with drinking water.

(c) Rubber, plastic should not be burnt.

(d) The quantity and types of garbage generated have increased.

Discussion

894.	Question 2 Which of the following changes cannot be reversed? (a) Hardening of cement (b) Freezing of ice cream (c) Opening a door (d) Melting of chocolate
Answer» Question 2 Which of the following changes cannot be reversed? (a) Hardening of cement (b) Freezing of ice cream (c) Opening a door (d) Melting of chocolate

894.

Question 2 Which of the following changes cannot be reversed? (a) Hardening of cement (b) Freezing of ice cream (c) Opening a door (d) Melting of chocolate

Answer»

Question 2

Which of the following changes cannot be reversed?
(a) Hardening of cement
(b) Freezing of ice cream
(c) Opening a door
(d) Melting of chocolate

Discussion

895.	Big drops of water solidify into ice and fall as pieces of ice known as ___ .
Answer» Big drops of water solidify into ice and fall as pieces of ice known as ___ .

Discussion

896.	what is the use of crystal system and what are fcc and bcc
Answer» what is the use of crystal system and what are fcc and bcc

Discussion

897.	define dencity
Answer» define dencity

Discussion

898.	72 optically active isomer of glucose
Answer» 72 optically active isomer of glucose

Discussion

899.	Question 35Suggest a few useful ways of utilizing waste water.
Answer» Question 35 Suggest a few useful ways of utilizing waste water.

Discussion

900.	A 448 ml of mixture of O2 and O3 measured at STP has mass 0.8 gram. What is the volume of O3 in the mixture at STP?
Answer» A 448 ml of mixture of O2 and O3 measured at STP has mass 0.8 gram. What is the volume of O3 in the mixture at STP?

Discussion

Explore topic-wise InterviewSolutions in .

What is carbonated water and its uses?

3.A simple electric motor has an armature resistance of 1ohm and runs from d.c. source of 12V . It draws current of 2A when unloaded. When a certain load is connected to it, its speed reduces by 10% of its initial value. The current draws by the loaded motor is

Which method will you use to separate the substances in each of the following mixtures? (a) water + alum (b) camphor + sand (c) water + soil (d) tea + tea leaves.

Names two metals that can displace hydrogen from an H2SO4.

What is rubber? Name some common objects that are made of rubber.

Question 2 (a) State for the following whether it is due to evaporation or condensation: Water drops appear on the outer surface of a glass containing cold water.

The process of conversion of ice into a liquid is known as:

What is red lead and it's uses ?

29. Natural and artificial fabrics

Which of the following correctly shows the process of weaving?

In which of the following examples the change in state of a substance is observed?(i) Melting of chocolate(ii) Boiling of water(iii) Cutting of vegetables(iv) Pouring of milk in tea

Continuous use of chemical fertilizers can make the soil ___.

The process of removing fleece from the sheep's body is known as ________.

What is chlorination in wastewater treatment?

What will happen when we mix sugar in a glass of water? What is this property called? [2 MARKS]

what is the value of 1j in cgs units

The component of air used by green plants to make their food is ___ .

What is winnowing?

What is the difference between sedimentation and decantation?

Out of the following, which gas is not present in the air in abundance?

Which soil among the following would you expect to have the highest percolation rate?

The state of matter which has a definite shape but no definite volume is(a) solid.(b) liquid.(c) gas.(d) none of these

Which of the following is an example of exhaustible natural resources?

Why is germination of a seed a chemical change ?

why are gases show more randomness than liquids and solids

Classify the following substances given in the table into elements and compounds. Cu, CaCO3, Zn, H2O, Na, C

What is the Water Cycle?

What is scientific notation?

What happens when the temperature of a saturated solution is raised?

Statement 1: Mangoes can be plucked from the trees but the grain seeds of plants like maize cannot be plucked from their stalks.Statement 2: Grain seeds of maize are very much bigger in size as compared to their stalks.

The S.I. unit of density is .

Which among the following cannot be used to spread over the wire mesh?

Explain the phenomenon of scattering of light. State the factors on which colours of scaterring light depends.

What temperature will a doctor’s thermometer show if placed in ice?

Out of the following options, which group of substances is made from the same material?

Name the method that can be used for separating the following mixture:(i) Sand and husk(ii) Wheat, sugar and stalk(iii) Water and petrol(iv) Rice and salt

Why is the image of the engine evoked by the poet?

Do you think it was necessary for them to take these decisions? Why?

what is lattice energ

Give reason how is interconversion of states of matter different from a chemical reaction. Answer in two to three lines.

Give reasons why : (a) Waste water should not be allowed to stagnate in puddles. (b) Waste water from a factory should not be allowed to mix with drinking water. (c) Rubber, plastic should not be burnt. (d) The quantity and types of garbage generated have increased.

Question 2 Which of the following changes cannot be reversed? (a) Hardening of cement (b) Freezing of ice cream (c) Opening a door (d) Melting of chocolate

Big drops of water solidify into ice and fall as pieces of ice known as ___ .

what is the use of crystal system and what are fcc and bcc

define dencity

72 optically active isomer of glucose

Question 35Suggest a few useful ways of utilizing waste water.

A 448 ml of mixture of O2 and O3 measured at STP has mass 0.8 gram. What is the volume of O3 in the mixture at STP?