3275 + Interview Questions in Chemistry Page 36 InterviewSolution

1751.	Why do water works have settling tanks?
Answer» Why do water works have settling tanks?

Discussion

1752.	Write the principle behind the given separation techniques along with an example:a) Centrifugationb) Sublimationc) Filtration
Answer» Write the principle behind the given separation techniques along with an example: a) Centrifugation b) Sublimation c) Filtration

Discussion

1753.	Is change of state of physical change or a chemical change?
Answer» Is change of state of physical change or a chemical change?

Discussion

1754.	Which of the following is not obtained from plants?
Answer» Which of the following is not obtained from plants?

Discussion

1755.	Why does Aluminium metal items which shines like silver when new, turns dull gray after sometime?
Answer» Why does Aluminium metal items which shines like silver when new, turns dull gray after sometime?

Discussion

1756.

Write down suitable words describing each picture.Pick up the words from the list given below: beautiful black red happy tall fat A ___ woman A rose A _ boy A _ peacock A _ board A ___ Man Now describe these pictures in your own language.Disclaimer: Kindly refer the textbook for the images.

Answer» Write down suitable words describing each picture.

Pick up the words from the list given below:

beautiful

black

red

happy

tall

fat


A _________ woman	A __________ rose	A _________ boy

A _________ peacock	A ___________ board	A _________ Man

Now describe these pictures in your own language.

Disclaimer: Kindly refer the textbook for the images.

Discussion

1757.	what kind of oxides are formed by potassium,rubidium and caesium
Answer» what kind of oxides are formed by potassium,rubidium and caesium

Discussion

1758.	List the points of differences between homogeneous and heterogeneous mixtures.
Answer» List the points of differences between homogeneous and heterogeneous mixtures.

Discussion

1759.	where are elementary particles present? what is the difference between elementary and subelementary particles? what is their mass
Answer» where are elementary particles present? what is the difference between elementary and subelementary particles? what is their mass

Discussion

1760.	What is the water cycle? What are the different stages of the water cycle?
Answer» What is the water cycle? What are the different stages of the water cycle?

Discussion

1761.	what is syngas
Answer» what is syngas

Discussion

1762.	Discuss some daily practices to reduce the use of plastic.
Answer» Discuss some daily practices to reduce the use of plastic.

Discussion

1763.	In an atom, which has 2K, 8L, 18M and 2Nelectrons in the ground state. The total number ofelectrons having magnetic quantum number,m 0 is(2) 10(4) 14(3) 7
Answer» In an atom, which has 2K, 8L, 18M and 2Nelectrons in the ground state. The total number ofelectrons having magnetic quantum number,m 0 is(2) 10(4) 14(3) 7

Discussion

1764.	Question 2 (a)(a) Tabulate the differences in the characteristics of states of matter.
Answer» Question 2 (a) (a) Tabulate the differences in the characteristics of states of matter.

Discussion

1765.	___ is a process by which plants lose water.
Answer» ___ is a process by which plants lose water.

Discussion

1766.	After knowing about plant fibres with the help of a coconut, he asked his mother one question. 'Which of the following is/are considered as synthetic fibre'?
Answer» After knowing about plant fibres with the help of a coconut, he asked his mother one question. 'Which of the following is/are considered as synthetic fibre'?

Discussion

1767.	Fill in the blanks to complete the sentence in the passive voice. Two girls ____ away right now.
Answer» Fill in the blanks to complete the sentence in the passive voice. Two girls ____ away right now.

1767.

Fill in the blanks to complete the sentence in the passive voice. Two girls ____ away right now.

Answer»

Fill in the blanks to complete the sentence in the passive voice.

Two girls ____ away right now.

Discussion

1768.	Which of the following are correct with respect to carbon monoxide? (i) It is released due to incomplete combustion of fuels. (ii) It does not affect humans. (iii) It is a toxic gas. (iv) It reduces oxygen-carrying capacity of the blood. (v) It is released from vehicles.
Answer» Which of the following are correct with respect to carbon monoxide? (i) It is released due to incomplete combustion of fuels. (ii) It does not affect humans. (iii) It is a toxic gas. (iv) It reduces oxygen-carrying capacity of the blood. (v) It is released from vehicles.

Discussion

1769.	Growth is increase in size. Is it a physical or a chemical change? Give reasons.
Answer» Growth is increase in size. Is it a physical or a chemical change? Give reasons.

Discussion

1770.	Why do ywe need to group material?
Answer» Why do ywe need to group material?

Discussion

1771.

Question 3 Match the objects given below with the materials from which they could be made. Remember, an object could be made from more than one material and a given material could be used for making many objects. ObjectsMaterials (1). Book(a). Glass (2). Tumbler(b). Wood (3). Chair(c). Paper (4). Toy(d). Leather (5). Shoes(e). Plastics

Answer»

Question 3

Match the objects given below with the materials from which they could be made.
Remember, an object could be made from more than one material and a given material could be used for making many objects.

Objects	Materials
(1). Book	(a). Glass
(2). Tumbler	(b). Wood
(3). Chair	(c). Paper
(4). Toy	(d). Leather
(5). Shoes	(e). Plastics

Discussion

1772.	Pizza is a ____ mixture of dough, sauce, cheese, and other toppings.
Answer» Pizza is a ____ mixture of dough, sauce, cheese, and other toppings.

Discussion

1773.	Define the following with an example:(i) Hand-picking(ii) Winnowing(iii) Threshing(iv) Sieving
Answer» Define the following with an example: (i) Hand-picking (ii) Winnowing (iii) Threshing (iv) Sieving

Discussion

1774.	The amount of world's freshwater in polar ice caps and glaciers is about _______ .
Answer» The amount of world's freshwater in polar ice caps and glaciers is about _______ .

1774.

The amount of world's freshwater in polar ice caps and glaciers is about _______ .

Answer»

The amount of world's freshwater in polar ice caps and glaciers is about _______ .

Discussion

1775.	Mettez les phrases à la forme négative.1. Le garçon a un vélo.2. C'est un stylo noir.3. Il y a des crêpes dans le four.4. Nous mangeons des escargots.
Answer» Mettez les phrases à la forme négative. 1. Le garçon a un vélo. 2. C'est un stylo noir. 3. Il y a des crêpes dans le four. 4. Nous mangeons des escargots.

Discussion

1776.	A 3 kg bottle falls from a height of 10 meter to 5 meter. (a) Calculate the loss in potential energy of body at this new position. (b) What is the kinetic energy of the body at this new position (i.e. at a distance of 5 meter from ground)? g = 10 m/s2
Answer» A 3 kg bottle falls from a height of 10 meter to 5 meter. (a) Calculate the loss in potential energy of body at this new position. (b) What is the kinetic energy of the body at this new position (i.e. at a distance of 5 meter from ground)? g = 10 m/s2

Discussion

1777.	Question 15 Garima observed that when she left her tightly capped bottle full of water in the open sunlight, tiny bubbles were formed all around inside the bottle. Help Garima to know why it so happened?
Answer» Question 15 Garima observed that when she left her tightly capped bottle full of water in the open sunlight, tiny bubbles were formed all around inside the bottle. Help Garima to know why it so happened?

1777.

Question 15 Garima observed that when she left her tightly capped bottle full of water in the open sunlight, tiny bubbles were formed all around inside the bottle. Help Garima to know why it so happened?

Answer»

Question 15

Garima observed that when she left her tightly capped bottle
full of water in the open sunlight, tiny bubbles were formed all
around inside the bottle. Help Garima to know why it so
happened?

Discussion

1778.	‘Don’t expect an English cup of tea’—how does this phrase bring out the contrast between the English and American attitudes?
Answer» ‘Don’t expect an English cup of tea’—how does this phrase bring out the contrast between the English and American attitudes?

Discussion

1779.	Name one gas which is soluble in water.
Answer» Name one gas which is soluble in water.

Discussion

1780.	What do you mean by Diffusion? What is the relationship between temperature, kinetic energy and rate of diffusion?
Answer» What do you mean by Diffusion? What is the relationship between temperature, kinetic energy and rate of diffusion?

Discussion

1781.	The pollutants released from oil refineries cause:
Answer» The pollutants released from oil refineries cause:

Discussion

1782.	Write any two activities which require more than a bucket of water.
Answer» Write any two activities which require more than a bucket of water.

Discussion

1783.	28.Two molecules each with permanent dipole moment 'p' are aligned as shown.Calculate the force between the molecules if they are separated by a distance that is large compared with the dimension of the dipoles.
Answer» 28.Two molecules each with permanent dipole moment 'p' are aligned as shown.Calculate the force between the molecules if they are separated by a distance that is large compared with the dimension of the dipoles.

Discussion

1784.	Although water is less denser than ice why does ice float on water
Answer» Although water is less denser than ice why does ice float on water

Discussion

1785.	Which of these is required to maintain the normal body temperature?
Answer» Which of these is required to maintain the normal body temperature?

Discussion

1786.	A servant of fire-brigade spraying water at the rate of 30 cubic cm per second from the pipe of 1 cmdiameter to control the fire. what is the force of reaction acting on him ?
Answer» A servant of fire-brigade spraying water at the rate of 30 cubic cm per second from the pipe of 1 cm diameter to control the fire. what is the force of reaction acting on him ?

Discussion

1787.	Why do you think desert plants have thin leaves or no leaves at all?
Answer» Why do you think desert plants have thin leaves or no leaves at all?

Discussion

1788.	__________ is conversion of solid to gas without passing through the intermediate liquid phase.
Answer» __________ is conversion of solid to gas without passing through the intermediate liquid phase.

Discussion

1789.	True or false?(a) A mixture of milk and water can be separated by filtration.(b) A mixture of powdered salt and sugar can be separated by the process of winnowing.(c) Separation of sugar from tea can be done with filtration.(d) Grain and husk can be separated with the process of decantation.
Answer» True or false? (a) A mixture of milk and water can be separated by filtration. (b) A mixture of powdered salt and sugar can be separated by the process of winnowing. (c) Separation of sugar from tea can be done with filtration. (d) Grain and husk can be separated with the process of decantation.

Discussion

1790.	Why does the temperature of a substance remains constant during melting and boiling even when heat is being supplied to it continuously .
Answer» Why does the temperature of a substance remains constant during melting and boiling even when heat is being supplied to it continuously .

Discussion

1791.	electronic configuration of d block elements
Answer» electronic configuration of d block elements

Discussion

1792.	Write down the uses of cotton and jute fibres.
Answer» Write down the uses of cotton and jute fibres.

Discussion

1793.	Question 7Why is ice at 273 K more effective in cooling than water at the same temperature?
Answer» Question 7 Why is ice at 273 K more effective in cooling than water at the same temperature?

Discussion

1794.	Describe a clinical thermometer.
Answer» Describe a clinical thermometer.

Discussion

1795.	molar heat capacity of water in equilibrium with ice at cons†an t pressure is
Answer» molar heat capacity of water in equilibrium with ice at cons†an t pressure is

Discussion

1796.	A student added the following substances to water kept in four separate beakers. He stirred the mixture well and filtered each one of them through a filter paper. He would obtain a solid residue on the filter paper in the case of :(1) egg albumin(2) common salt(3) chalk powder(4) alum
Answer» A student added the following substances to water kept in four separate beakers. He stirred the mixture well and filtered each one of them through a filter paper. He would obtain a solid residue on the filter paper in the case of : (1) egg albumin (2) common salt (3) chalk powder (4) alum

Discussion

1797.	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

1798.	how does solubility depend upon nature of solvent in the solid in liquid solution ?
Answer» how does solubility depend upon nature of solvent in the solid in liquid solution ?

Discussion

1799.

Classify into sublimating and non-sublimating substances : sand, iodine, salt, alum, sal ammoniac, sugar, camphor, water oil, naphthalene, turmeric.

Answer»

Classify into sublimating and non-sublimating substances :

sand, iodine, salt, alum, sal ammoniac, sugar, camphor, water oil, naphthalene, turmeric.

Discussion

1800.	What is supernatant liquid?
Answer» What is supernatant liquid?

Discussion

Explore topic-wise InterviewSolutions in .

Why do water works have settling tanks?

Write the principle behind the given separation techniques along with an example:a) Centrifugationb) Sublimationc) Filtration

Is change of state of physical change or a chemical change?

Which of the following is not obtained from plants?

Why does Aluminium metal items which shines like silver when new, turns dull gray after sometime?

what kind of oxides are formed by potassium,rubidium and caesium

List the points of differences between homogeneous and heterogeneous mixtures.

where are elementary particles present? what is the difference between elementary and subelementary particles? what is their mass

What is the water cycle? What are the different stages of the water cycle?

what is syngas

Discuss some daily practices to reduce the use of plastic.

In an atom, which has 2K, 8L, 18M and 2Nelectrons in the ground state. The total number ofelectrons having magnetic quantum number,m 0 is(2) 10(4) 14(3) 7

Question 2 (a)(a) Tabulate the differences in the characteristics of states of matter.

___ is a process by which plants lose water.

After knowing about plant fibres with the help of a coconut, he asked his mother one question. 'Which of the following is/are considered as synthetic fibre'?

Fill in the blanks to complete the sentence in the passive voice. Two girls ____ away right now.

Which of the following are correct with respect to carbon monoxide? (i) It is released due to incomplete combustion of fuels. (ii) It does not affect humans. (iii) It is a toxic gas. (iv) It reduces oxygen-carrying capacity of the blood. ​(v) It is released from vehicles.

Growth is increase in size. Is it a physical or a chemical change? Give reasons.

Why do ywe need to group material?

Pizza is a ____ mixture of dough, sauce, cheese, and other toppings.

Define the following with an example:(i) Hand-picking(ii) Winnowing(iii) Threshing(iv) Sieving

The amount of world's freshwater in polar ice caps and glaciers is about _______ .

Mettez les phrases à la forme négative.1. Le garçon a un vélo.2. C'est un stylo noir.3. Il y a des crêpes dans le four.4. Nous mangeons des escargots.

A 3 kg bottle falls from a height of 10 meter to 5 meter. (a) Calculate the loss in potential energy of body at this new position. (b) What is the kinetic energy of the body at this new position (i.e. at a distance of 5 meter from ground)? g = 10 m/s2

Question 15 Garima observed that when she left her tightly capped bottle full of water in the open sunlight, tiny bubbles were formed all around inside the bottle. Help Garima to know why it so happened?

‘Don’t expect an English cup of tea’—how does this phrase bring out the contrast between the English and American attitudes?

Name one gas which is soluble in water.

What do you mean by Diffusion? What is the relationship between temperature, kinetic energy and rate of diffusion?

The pollutants released from oil refineries cause:

Write any two activities which require more than a bucket of water.

28.Two molecules each with permanent dipole moment 'p' are aligned as shown.Calculate the force between the molecules if they are separated by a distance that is large compared with the dimension of the dipoles.

Although water is less denser than ice why does ice float on water

Which of these is required to maintain the normal body temperature?

A servant of fire-brigade spraying water at the rate of 30 cubic cm per second from the pipe of 1 cmdiameter to control the fire. what is the force of reaction acting on him ?

Why do you think desert plants have thin leaves or no leaves at all?

__________ is conversion of solid to gas without passing through the intermediate liquid phase.

True or false?(a) A mixture of milk and water can be separated by filtration.(b) A mixture of powdered salt and sugar can be separated by the process of winnowing.(c) Separation of sugar from tea can be done with filtration.(d) Grain and husk can be separated with the process of decantation.

Why does the temperature of a substance remains constant during melting and boiling even when heat is being supplied to it continuously .

electronic configuration of d block elements

Write down the uses of cotton and jute fibres.

Question 7Why is ice at 273 K more effective in cooling than water at the same temperature?

Describe a clinical thermometer.

molar heat capacity of water in equilibrium with ice at cons†an t pressure is

A student added the following substances to water kept in four separate beakers. He stirred the mixture well and filtered each one of them through a filter paper. He would obtain a solid residue on the filter paper in the case of :(1) egg albumin(2) common salt(3) chalk powder(4) alum

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

how does solubility depend upon nature of solvent in the solid in liquid solution ?

Classify into sublimating and non-sublimating substances : sand, iodine, salt, alum, sal ammoniac, sugar, camphor, water oil, naphthalene, turmeric.

What is supernatant liquid?

Which of the following are correct with respect to carbon monoxide? (i) It is released due to incomplete combustion of fuels. (ii) It does not affect humans. (iii) It is a toxic gas. (iv) It reduces oxygen-carrying capacity of the blood. (v) It is released from vehicles.