3275 + Interview Questions in Chemistry Page 29 InterviewSolution

1401.	How is crystallization better than evaporation?
Answer» How is crystallization better than evaporation?

Discussion

1402.	Scientists have created a new substance that is so transparent as to be almost invisible.
Answer» Scientists have created a new substance that is so transparent as to be almost invisible.

Discussion

1403.	digestion of food is ____________ change
Answer» digestion of food is ____________ change

Discussion

1404.	Read the story titled “WISE FARMER” and tick the correct option to complete the story.A farmer was sad/happy to see his healthy wheat crop ready for harvest. He harvested the crops and left them under the sun/rain to dry the stalks. To separate the seeds from the bundles of the stalk he handpicked/threshed them. After gathering the seed grains he wanted to separate the stones and husk from it.His wife winnowed/threshed them to separate the husk and later sieved/handpicked to remove stones from it. She ground the wheat grains and sieved/filtered the flour. The wise farmer and his wife got a good price for the flour. Can you tell why?
Answer» Read the story titled “WISE FARMER” and tick the correct option to complete the story. A farmer was sad/happy to see his healthy wheat crop ready for harvest. He harvested the crops and left them under the sun/rain to dry the stalks. To separate the seeds from the bundles of the stalk he handpicked/threshed them. After gathering the seed grains he wanted to separate the stones and husk from it. His wife winnowed/threshed them to separate the husk and later sieved/handpicked to remove stones from it. She ground the wheat grains and sieved/filtered the flour. The wise farmer and his wife got a good price for the flour. Can you tell why?

Discussion

1405.	What are heterogeneous and homogeneous mixtures? Give examples.
Answer» What are heterogeneous and homogeneous mixtures? Give examples.

Discussion

1406.	Metals are lustrous, but an iron rod used in construction does not shine. Explain.
Answer» Metals are lustrous, but an iron rod used in construction does not shine. Explain.

Discussion

1407.	If 100 g of salt is mixed with 100 g of sand. What happens to the taste of the salt crystals?
Answer» If 100 g of salt is mixed with 100 g of sand. What happens to the taste of the salt crystals?

Discussion

1408.	Which of the following materials have lustre?
Answer» Which of the following materials have lustre?

Discussion

1409.	What is the grouping together of things with similar properties called?
Answer» What is the grouping together of things with similar properties called?

Discussion

1410.	___ is the process by which a gas changes into solid.
Answer» ___ is the process by which a gas changes into solid.

Discussion

1411.	Which of the following are the causes of air pollution?
Answer» Which of the following are the causes of air pollution?

Discussion

1412.	You must be familiar with the following nursery rhymes:(i) ‘Baa baa black sheep, have you any wool.’(ii) ‘Mary had a little lamb, whose fleece was white as snow.'Answer the following:(a) Which parts of the black sheep have wool?(b) What is meant by the white fleece of the lamb?
Answer» You must be familiar with the following nursery rhymes: (i) ‘Baa baa black sheep, have you any wool.’ (ii) ‘Mary had a little lamb, whose fleece was white as snow.' Answer the following: (a) Which parts of the black sheep have wool? (b) What is meant by the white fleece of the lamb?

1412.

You must be familiar with the following nursery rhymes:(i) ‘Baa baa black sheep, have you any wool.’(ii) ‘Mary had a little lamb, whose fleece was white as snow.'Answer the following:(a) Which parts of the black sheep have wool?(b) What is meant by the white fleece of the lamb?

Answer»

You must be familiar with the following nursery rhymes:

(i) ‘Baa baa black sheep, have you any wool.’

(ii) ‘Mary had a little lamb, whose fleece was white as snow.'

Answer the following:

(a) Which parts of the black sheep have wool?

(b) What is meant by the white fleece of the lamb?

Discussion

1413.	Question 2Try segregating the things around you as pure substances or mixtures.
Answer» Question 2 Try segregating the things around you as pure substances or mixtures.

Discussion

1414.	In neutralisation reaction:
Answer» In neutralisation reaction:

Discussion

1415.	Fill in the blanks with appropriate words.(a) Synthetic fibres are also called _______ __or _______ __fibres.(b) Synthetic fibres are synthesised from raw materials called _________.(c) Like synthetic fibres, plastic is also a _________.
Answer» Fill in the blanks with appropriate words. (a) Synthetic fibres are also called _______ __or _______ __fibres. (b) Synthetic fibres are synthesised from raw materials called _________. (c) Like synthetic fibres, plastic is also a _________.

1415.

Fill in the blanks with appropriate words.(a) Synthetic fibres are also called ___ or _ fibres.(b) Synthetic fibres are synthesised from raw materials called _.(c) Like synthetic fibres, plastic is also a ___.

Answer»

Fill in the blanks with appropriate words.

(a) Synthetic fibres are also called _______ __or _______ __fibres.

(b) Synthetic fibres are synthesised from raw materials called _________.

(c) Like synthetic fibres, plastic is also a _________.

Discussion

1416.	(i) Given below are the names of some objects and materials:Water, basketball, orange, sugar, globe, apple and earthen pitcherGroup them as: Round shaped and other shapes(ii) Given below are the names of some objects and materials:Water, basketball, orange, sugar, globe, apple and earthen pitcherGroup them as: Eatables and non eatables
Answer» (i) Given below are the names of some objects and materials: Water, basketball, orange, sugar, globe, apple and earthen pitcher Group them as: Round shaped and other shapes (ii) Given below are the names of some objects and materials: Water, basketball, orange, sugar, globe, apple and earthen pitcher Group them as: Eatables and non eatables

Discussion

1417.	What is a decantation ?
Answer» What is a decantation ?

Discussion

1418.	Question 2The ability of an object to resist any deformation or the ability to undergo damage when pressure is applied is defined as the hardness or softness of that object.(a) An object which is very hard is used in jewellery. Identify the object.(b) Which object is harder: steel pipe or wooden piece?
Answer» Question 2 The ability of an object to resist any deformation or the ability to undergo damage when pressure is applied is defined as the hardness or softness of that object. (a) An object which is very hard is used in jewellery. Identify the object. (b) Which object is harder: steel pipe or wooden piece?

1418.

Question 2The ability of an object to resist any deformation or the ability to undergo damage when pressure is applied is defined as the hardness or softness of that object.(a) An object which is very hard is used in jewellery. Identify the object.(b) Which object is harder: steel pipe or wooden piece?

Answer»

Question 2

The ability of an object to resist any deformation or the ability to undergo damage when pressure is applied is defined as the hardness or softness of that object.

(a) An object which is very hard is used in jewellery. Identify the object.

(b) Which object is harder: steel pipe or wooden piece?

Discussion

1419.	what is lewis symbol?
Answer» what is lewis symbol?

Discussion

1420.	Question 19A lot of dry leaves are collected in a school garden and are burnt every day. Do you think that it is right to do so? If not, what should be done to dispose off the dry leaves?
Answer» Question 19 A lot of dry leaves are collected in a school garden and are burnt every day. Do you think that it is right to do so? If not, what should be done to dispose off the dry leaves?

Discussion

1421.	Answer in brief : (a) Name the components of the environment. (b) For which purposes is water used on a large scale? (c) How does the water in a reservoir get contaminated? (d) How does air get polluted? (e) Explain the effects of a polluted environment. (f) How was garbage of a village or town disposed of in the past?
Answer» Answer in brief : (a) Name the components of the environment. (b) For which purposes is water used on a large scale? (c) How does the water in a reservoir get contaminated? (d) How does air get polluted? (e) Explain the effects of a polluted environment. (f) How was garbage of a village or town disposed of in the past?

1421.

Answer in brief : (a) Name the components of the environment. (b) For which purposes is water used on a large scale? (c) How does the water in a reservoir get contaminated? (d) How does air get polluted? (e) Explain the effects of a polluted environment. (f) How was garbage of a village or town disposed of in the past?

Answer»

Answer in brief :

(a) Name the components of the environment.

(b) For which purposes is water used on a large scale?

(c) How does the water in a reservoir get contaminated?

(d) How does air get polluted?

(e) Explain the effects of a polluted environment.

(f) How was garbage of a village or town disposed of in the past?

Discussion

1422.	A solution contains 50 g of common salt in 400 g of water. Calculate the concentration by mass percentage of the solution.
Answer» A solution contains 50 g of common salt in 400 g of water. Calculate the concentration by mass percentage of the solution.

Discussion

1423.

Pick five objects from the word box given below which are opaque and would sink in water. O S R P L E A T L E E R C O I N A A O N K C F S A E E I W E L L Y L R R

Answer» Pick five objects from the word box given below which are opaque and would sink in water.

O	S	R	P	L	E
A	T	L	E	E	R
C	O	I	N	A	A
O	N	K	C	F	S
A	E	E	I	W	E
L	L	Y	L	R	R

Discussion

1424.	How to find equivalent weight of salt
Answer» How to find equivalent weight of salt

Discussion

1425.	Which of the following statements is NOT true?
Answer» Which of the following statements is NOT true?

Discussion

1426.	How can we classify objects based on their hardness?
Answer» How can we classify objects based on their hardness?

Discussion

1427.	62. How are substances coloured?
Answer» 62. How are substances coloured?

Discussion

1428.	Why is the atmosphere essential for life on earth?
Answer» Why is the atmosphere essential for life on earth?

Discussion

1429.	While picking a material to make an object, which of the following parameters are most important?
Answer» While picking a material to make an object, which of the following parameters are most important?

Discussion

1430.	Nitrogen exists as two nitrogen atoms joined by a ___.
Answer» Nitrogen exists as two nitrogen atoms joined by a ___.

Discussion

1431.	the condition of free vapourizition through out the liquid a. freezing b.melting c.evaporation d.boili
Answer» the condition of free vapourizition through out the liquid a. freezing b.melting c.evaporation d.boili

Discussion

1432.	74. For non zero value of force of attraction between gas molecule,equation of gas will be? Explain in detail.
Answer» 74. For non zero value of force of attraction between gas molecule,equation of gas will be? Explain in detail.

Discussion

1433.	What is the use of thistle Funnel in a laboratory and what is the use of pipette in a laboratory what is the use of burette what is the use of pestle and mortar what is the use of China dish in a laboratory
Answer» What is the use of thistle Funnel in a laboratory and what is the use of pipette in a laboratory what is the use of burette what is the use of pestle and mortar what is the use of China dish in a laboratory

Discussion

1434.	Arrange the following substances in increasing order of force of attraction between their paricles (keeping the substance having the minimum force of attraction first) :Water, Sugar, Oxygen
Answer» Arrange the following substances in increasing order of force of attraction between their paricles (keeping the substance having the minimum force of attraction first) : Water, Sugar, Oxygen

Discussion

1435.	Why is charcoal a better biomass fuel than wood?
Answer» Why is charcoal a better biomass fuel than wood?

Discussion

1436.	Weaving of fibre is done on ___ machine .
Answer» Weaving of fibre is done on ___ machine .

Discussion

1437.	What are homogeneous and heterogeneous mixtures
Answer» What are homogeneous and heterogeneous mixtures

Discussion

1438.	what is magnitude and velocity??
Answer» what is magnitude and velocity??

Discussion

1439.	Density is given by
Answer» Density is given by

Discussion

1440.	What will be the molality of a solution obtained by dissolving 4.9g of h2so4 in 250g of water
Answer» What will be the molality of a solution obtained by dissolving 4.9g of h2so4 in 250g of water

Discussion

1441.	How would you show that the setting of curd is a chemical change?
Answer» How would you show that the setting of curd is a chemical change?

Discussion

1442.	A student was asked to mix egg white with water and stir it well. What did you think he observed?
Answer» A student was asked to mix egg white with water and stir it well. What did you think he observed?

Discussion

1443.	What will be the heat of formation of ethane, if the heat of combustion of carbon is –x kJ, heat of formation of water is –y kJ and heat liberated during combustion of ethane is z kJ/mol?
Answer» What will be the heat of formation of ethane, if the heat of combustion of carbon is –x kJ, heat of formation of water is –y kJ and heat liberated during combustion of ethane is z kJ/mol?

Discussion

1444.	Where do we get freshwater from?
Answer» Where do we get freshwater from?

Discussion

1445.	Chemical changes are(a) always irreversible.(b) mostly irreversible.(c) always reversible.(d) mostly reversible.
Answer» Chemical changes are (a) always irreversible. (b) mostly irreversible. (c) always reversible. (d) mostly reversible.

Discussion

1446.	Trouve dans le texte:1. La forme nominale de «respirer».2. Le contraire de « être en bonne santé ».3. Le contraire de «vider».4. Un verbe pronominal.5. Un mot qui veut dire 'sérieux'.
Answer» Trouve dans le texte: 1. La forme nominale de «respirer». 2. Le contraire de « être en bonne santé ». 3. Le contraire de «vider». 4. Un verbe pronominal. 5. Un mot qui veut dire 'sérieux'.

Discussion

1447.	Question 7Rainfall patterns depend on:(a) the underground water table(b) the number of water bodies in an area(c) the density pattern of human population in an area(d) the prevailing season in an area
Answer» Question 7 Rainfall patterns depend on: (a) the underground water table (b) the number of water bodies in an area (c) the density pattern of human population in an area (d) the prevailing season in an area

Discussion

1448.	State similarities and differences between the laboratory thermometer and the clinical thermometer.
Answer» State similarities and differences between the laboratory thermometer and the clinical thermometer.

Discussion

1449.	can compounds be separated using chemical methods ?
Answer» can compounds be separated using chemical methods ?

Discussion

1450.	Coke is formed when coal is heated in absence of
Answer» Coke is formed when coal is heated in absence of

Discussion

Explore topic-wise InterviewSolutions in .

How is crystallization better than evaporation?

Scientists have created a new substance that is so transparent as to be almost invisible.

digestion of food is ____________ change

What are heterogeneous and homogeneous mixtures? Give examples.

Metals are lustrous, but an iron rod used in construction does not shine. Explain.

If 100 g of salt is mixed with 100 g of sand. What happens to the taste of the salt crystals?

Which of the following materials have lustre?

What is the grouping together of things with similar properties called?

___ is the process by which a gas changes into solid.

Which of the following are the causes of air pollution?

You must be familiar with the following nursery rhymes:(i) ‘Baa baa black sheep, have you any wool.’(ii) ‘Mary had a little lamb, whose fleece was white as snow.'Answer the following:(a) Which parts of the black sheep have wool?(b) What is meant by the white fleece of the lamb?

Question 2Try segregating the things around you as pure substances or mixtures.

In neutralisation reaction:

Fill in the blanks with appropriate words.(a) Synthetic fibres are also called _______ __or _______ __fibres.(b) Synthetic fibres are synthesised from raw materials called _________.(c) Like synthetic fibres, plastic is also a _________.

What is a decantation ?

what is lewis symbol?

Question 19A lot of dry leaves are collected in a school garden and are burnt every day. Do you think that it is right to do so? If not, what should be done to dispose off the dry leaves?

A solution contains 50 g of common salt in 400 g of water. Calculate the concentration by mass percentage of the solution.

Pick five objects from the word box given below which are opaque and would sink in water. O S R P L E A T L E E R C O I N A A O N K C F S A E E I W E L L Y L R R

How to find equivalent weight of salt

Which of the following statements is NOT true?

How can we classify objects based on their hardness?

62. How are substances coloured?

Why is the atmosphere essential for life on earth?

While picking a material to make an object, which of the following parameters are most important?

Nitrogen exists as two nitrogen atoms joined by a ___.

the condition of free vapourizition through out the liquid a. freezing b.melting c.evaporation d.boili

74. For non zero value of force of attraction between gas molecule,equation of gas will be? Explain in detail.

What is the use of thistle Funnel in a laboratory and what is the use of pipette in a laboratory what is the use of burette what is the use of pestle and mortar what is the use of China dish in a laboratory

Arrange the following substances in increasing order of force of attraction between their paricles (keeping the substance having the minimum force of attraction first) :Water, Sugar, Oxygen

Why is charcoal a better biomass fuel than wood?

Weaving of fibre is done on ___ machine .

What are homogeneous and heterogeneous mixtures

what is magnitude and velocity??

Density is given by

What will be the molality of a solution obtained by dissolving 4.9g of h2so4 in 250g of water

How would you show that the setting of curd is a chemical change?​

A student was asked to mix egg white with water and stir it well. What did you think he observed?

What will be the heat of formation of ethane, if the heat of combustion of carbon is –x kJ, heat of formation of water is –y kJ and heat liberated during combustion of ethane is z kJ/mol?

Where do we get freshwater from?

Chemical changes are(a) always irreversible.(b) mostly irreversible.(c) always reversible.(d) mostly reversible.

Trouve dans le texte:1. La forme nominale de «respirer».2. Le contraire de « être en bonne santé ».3. Le contraire de «vider».4. Un verbe pronominal.5. Un mot qui veut dire 'sérieux'.

Question 7Rainfall patterns depend on:(a) the underground water table(b) the number of water bodies in an area(c) the density pattern of human population in an area(d) the prevailing season in an area

State similarities and differences between the laboratory thermometer and the clinical thermometer.

can compounds be separated using chemical methods ?

Coke is formed when coal is heated in absence of

Fill in the blanks with appropriate words.(a) Synthetic fibres are also called ___ or _ fibres.(b) Synthetic fibres are synthesised from raw materials called _.(c) Like synthetic fibres, plastic is also a ___.

How would you show that the setting of curd is a chemical change?