3275 + Interview Questions in Chemistry Page 30 InterviewSolution

1451.	shape of Fe(Co)
Answer» shape of Fe(Co)

Discussion

1452.	Name the method by which sedimentation can be made faster.
Answer» Name the method by which sedimentation can be made faster.

Discussion

1453.	We should insist the shopkeepers to use:
Answer» We should insist the shopkeepers to use:

Discussion

1454.	How does the failure of rainfall affect people on the earth?
Answer» How does the failure of rainfall affect people on the earth?

Discussion

1455.	22. How many electron in a given atom can have the following quantum numbers?(a) n=4 ,l=2,m=0 (b) n=4,l=2,modulus of m=2(c)n greater than or equal to 4 modulus of m=1(give details explanation)
Answer» 22. How many electron in a given atom can have the following quantum numbers?(a) n=4 ,l=2,m=0 (b) n=4,l=2,modulus of m=2(c)n greater than or equal to 4 modulus of m=1(give details explanation)

Discussion

1456.	How the industries can contribute in preventing water pollution?
Answer» How the industries can contribute in preventing water pollution?

Discussion

1457.	What do you mean by fossil fuel? Give two examples of fossil fuel. List effects of pollution caused due to the burning of fossil fuels? [3 MARKS]
Answer» What do you mean by fossil fuel? Give two examples of fossil fuel. List effects of pollution caused due to the burning of fossil fuels? [3 MARKS]

Discussion

1458.

Some changes are listed in the following table. For each change, write in the blank column, whether the change can be reversed or not. S. No. Change Can be reversed (Yes/ No) 1. The sawing of a piece of wood 2. The melting of ice candy 3. Dissolving sugar in water 4. The cooking of food 5. The ripening of a mango 6. Souring of milk

Answer» Some changes are listed in the following table. For each change, write in the blank column, whether the change can be reversed or not.

S. No.	Change	Can be reversed (Yes/ No)
1.	The sawing of a piece of wood
2.	The melting of ice candy
3.	Dissolving sugar in water
4.	The cooking of food
5.	The ripening of a mango
6.	Souring of milk

Discussion

1459.	_______ is based on the difference in rates of adsorption of different substances on the surface of a suitable adsorbent.
Answer» _______ is based on the difference in rates of adsorption of different substances on the surface of a suitable adsorbent.

Discussion

1460.	Which of the following energy conversion takes place while working with a mixer grinder?
Answer» Which of the following energy conversion takes place while working with a mixer grinder?

Discussion

1461.	Question 4 Mountaineers carry oxygen cylinders with them because : a) There is no oxygen on high mountains. b) There is deficiency of oxygen on mountains at high atltitude. c) oxygen is used for cooking. d) oxygen keeps them warm at low temperature.
Answer» Question 4 Mountaineers carry oxygen cylinders with them because : a) There is no oxygen on high mountains. b) There is deficiency of oxygen on mountains at high atltitude. c) oxygen is used for cooking. d) oxygen keeps them warm at low temperature.

1461.

Question 4 Mountaineers carry oxygen cylinders with them because : a) There is no oxygen on high mountains. b) There is deficiency of oxygen on mountains at high atltitude. c) oxygen is used for cooking. d) oxygen keeps them warm at low temperature.

Answer»

Question 4

Mountaineers carry oxygen cylinders with them because :

a) There is no oxygen on high mountains.

b) There is deficiency of oxygen on mountains at high atltitude.

c) oxygen is used for cooking.

d) oxygen keeps them warm at low temperature.

Discussion

1462.	A piece of iron is heated till it becomes red-hot. It then becomes soft and is beaten to the desired shape. What kind of changes are observed in this process– reversible or irreversible?
Answer» A piece of iron is heated till it becomes red-hot. It then becomes soft and is beaten to the desired shape. What kind of changes are observed in this process– reversible or irreversible?

Discussion

1463.	Rashi was in her village.There she found wheat grains mixed with powdered dry leaves.How can she separate the two of them easily? Explain the whole mechanism in detail.
Answer» Rashi was in her village.There she found wheat grains mixed with powdered dry leaves.How can she separate the two of them easily? Explain the whole mechanism in detail.

Discussion

1464.	Water seeps through the spaces in the ground. Where does the water get collected? What happens to this water? [3 MARKS]
Answer» Water seeps through the spaces in the ground. Where does the water get collected? What happens to this water? [3 MARKS]

Discussion

1465.	The ash obtained from burning of magnesium ribbon is dissolved in water. The solution is tested by litmus paper for acidic nature. Which of the following options is/ are correct?
Answer» The ash obtained from burning of magnesium ribbon is dissolved in water. The solution is tested by litmus paper for acidic nature. Which of the following options is/ are correct?

Discussion

1466.	Which of these is a polyatomic ion? SO42−, NO3−, CO32−
Answer» Which of these is a polyatomic ion? ${S O}_{4}^{2 -}$ , ${N O}_{3}^{-}$ , ${C O}_{3}^{2 -}$

1466.

Which of these is a polyatomic ion? SO42−, NO3−, CO32−

Answer»

Which of these is a polyatomic ion?

${S O}_{4}^{2 -}$ , ${N O}_{3}^{-}$ , ${C O}_{3}^{2 -}$

Discussion

1467.	Question 2 (g) State whether the following statement is true or false: Polyester is a natural fibre.
Answer» Question 2 (g) State whether the following statement is true or false: Polyester is a natural fibre.

1467.

Question 2 (g) State whether the following statement is true or false: Polyester is a natural fibre.

Answer»

Question 2 (g)

State whether the following statement is true or false:
Polyester is a natural fibre.

Discussion

1468.	Explain the method distillation.
Answer» Explain the method distillation.

Discussion

1469.	A substance undergoes a change in which its molecules undergo changes. What kind of change is it - physical or chemical?
Answer» A substance undergoes a change in which its molecules undergo changes. What kind of change is it - physical or chemical?

Discussion

1470.	Three friends went to the park.They started playing and at the end of the game, all three of them were panting and breathing heavily. Sam noticed that John was breathing through his mouth so he advised him to breath through nose and not through mouth.To this Kenneth said ' how does it matter? we will be inhaling the same air whether we breathe through nose or through mouth'.Sam gave a reasonable explanation to make Kenneth and John understand that they should breathe through our nose and not through our mouth.What was explanation given by Sam?
Answer» Three friends went to the park. They started playing and at the end of the game, all three of them were panting and breathing heavily. Sam noticed that John was breathing through his mouth so he advised him to breath through nose and not through mouth. To this Kenneth said ' how does it matter? we will be inhaling the same air whether we breathe through nose or through mouth'. Sam gave a reasonable explanation to make Kenneth and John understand that they should breathe through our nose and not through our mouth. What was explanation given by Sam?

1470.

Three friends went to the park.They started playing and at the end of the game, all three of them were panting and breathing heavily. Sam noticed that John was breathing through his mouth so he advised him to breath through nose and not through mouth.To this Kenneth said ' how does it matter? we will be inhaling the same air whether we breathe through nose or through mouth'.Sam gave a reasonable explanation to make Kenneth and John understand that they should breathe through our nose and not through our mouth.What was explanation given by Sam?

Answer» Three friends went to the park.

They started playing and at the end of the game, all three of them were panting and breathing heavily. Sam noticed that John was breathing through his mouth so he advised him to breath through nose and not through mouth.

To this Kenneth said ' how does it matter? we will be inhaling the same air whether we breathe through nose or through mouth'.

Sam gave a reasonable explanation to make Kenneth and John understand that they should breathe through our nose and not through our mouth.

What was explanation given by Sam?

Discussion

1471.	An astronomical telescope has a large aperture to:
Answer» An astronomical telescope has a large aperture to:

Discussion

1472.	Why does oil never mix with water and always floats on top?
Answer» Why does oil never mix with water and always floats on top?

Discussion

1473.	What is the principle used in the separation of mixtures?
Answer» What is the principle used in the separation of mixtures?

Discussion

1474.	what is the experimental sample and control sample ?
Answer» what is the experimental sample and control sample ?

Discussion

1475.	Every change can be classified as either physical or chemical. True or false?
Answer» Every change can be classified as either physical or chemical. True or false?

Discussion

1476.	Rajat collected some rainwater in a clean glass tumbler and tested it using a tester. To his surprise he found that the compass needle showed deflection. What could be the possible reason for his observation?
Answer» Rajat collected some rainwater in a clean glass tumbler and tested it using a tester. To his surprise he found that the compass needle showed deflection. What could be the possible reason for his observation?

Discussion

1477.	What is intermolecular force of attraction ?
Answer» What is intermolecular force of attraction ?

Discussion

1478.	Can water dissolve liquids and gases also?
Answer» Can water dissolve liquids and gases also?

Discussion

1479.	The husk can be removed from flour by
Answer» The husk can be removed from flour by

Discussion

1480.	What type of changes occur when a mixture is formed?
Answer» What type of changes occur when a mixture is formed?

Discussion

1481.	The magnetic properties of iron disappear when it is heated strongly. Which of these changes does this illustrate?
Answer» The magnetic properties of iron disappear when it is heated strongly. Which of these changes does this illustrate?

Discussion

1482.	What kind of fabrics cannot be used for the making of clothes?
Answer» What kind of fabrics cannot be used for the making of clothes?

Discussion

1483.	What is the difference between homogeneous and heterogeneous mixtures? Give an example of each mixture.
Answer» What is the difference between homogeneous and heterogeneous mixtures? Give an example of each mixture.

Discussion

1484.	why water is not allowed to react with grinard reagent?
Answer» why water is not allowed to react with grinard reagent?

Discussion

1485.	Select the appropriate option that can relate to the process of refining of petroleum.
Answer» Select the appropriate option that can relate to the process of refining of petroleum.

Discussion

1486.	How many of the given substances are soluble in water?Substances: Sugar, petrol, salt, vinegar, sand, oil3
Answer» How many of the given substances are soluble in water? Substances: Sugar, petrol, salt, vinegar, sand, oil 3

Discussion

1487.	Smith has a mixture of( sand+salt+hardstone+iron piece+husk+sawdust) he need the sand to get saparared from this which he can use to construct building. Suggest him different ways of saperating all the components.
Answer» Smith has a mixture of( sand+salt+hardstone+iron piece+husk+sawdust) he need the sand to get saparared from this which he can use to construct building. Suggest him different ways of saperating all the components.

Discussion

1488.	Question 2 (b) State whether the following statement is true or false: Spinning is a process of making fibres.
Answer» Question 2 (b) State whether the following statement is true or false: Spinning is a process of making fibres.

1488.

Question 2 (b) State whether the following statement is true or false: Spinning is a process of making fibres.

Answer»

Question 2 (b)

State whether the following statement is true or false:
Spinning is a process of making fibres.

Discussion

1489.	range of sgn(e^x)?
Answer» range of sgn(e^x)?

Discussion

1490.	In the treatment of water, solid impurities are allowed to settle to the bottom. This particular stage in the entire purification is called ___
Answer» In the treatment of water, solid impurities are allowed to settle to the bottom. This particular stage in the entire purification is called ___

Discussion

1491.	What does a conservative force mean?
Answer» What does a conservative force mean?

Discussion

1492.	What is the equivalent weight of MgHPO3andMgHPO4?
Answer» What is the equivalent weight of MgHPO3andMgHPO4?

Discussion

1493.	In which case evaporation of water will be faster
Answer» In which case evaporation of water will be faster

Discussion

1494.	Why are there different names for meditating particles while thier function are same
Answer» Why are there different names for meditating particles while thier function are same

Discussion

1495.	what is base ex and explaine
Answer» what is base ex and explaine

Discussion

1496.	How is milk converted into curd? Can the milk be obtained again from the curd? What kind of change is this? [3 MARKS]
Answer» How is milk converted into curd? Can the milk be obtained again from the curd? What kind of change is this? [3 MARKS]

Discussion

1497.	The fruits of the cotton plant are also called as:
Answer» The fruits of the cotton plant are also called as:

Discussion

1498.	Which of the following is true in the case of an ice cream?
Answer» Which of the following is true in the case of an ice cream?

Discussion

1499.	What is the value of r in 18Cr
Answer» What is the value of r in 18Cr

Discussion

1500.	(a) Define the term 'latent heat of fusion' of a solid. How much is the latent heat of fusion of ice?(b) Draw a labelled diagram of the experimental set-up to study the latent heat of fusion of ice.
Answer» (a) Define the term 'latent heat of fusion' of a solid. How much is the latent heat of fusion of ice? (b) Draw a labelled diagram of the experimental set-up to study the latent heat of fusion of ice.

Discussion

Explore topic-wise InterviewSolutions in .

shape of Fe(Co)

Name the method by which sedimentation can be made faster.

We should insist the shopkeepers to use:

How does the failure of rainfall affect people on the earth?

22. How many electron in a given atom can have the following quantum numbers?(a) n=4 ,l=2,m=0 (b) n=4,l=2,modulus of m=2(c)n greater than or equal to 4 modulus of m=1(give details explanation)

How the industries can contribute in preventing water pollution?

What do you mean by fossil fuel? Give two examples of fossil fuel. List effects of pollution caused due to the burning of fossil fuels? [3 MARKS]

_______ is based on the difference in rates of adsorption of different substances on the surface of a suitable adsorbent.

Which of the following energy conversion takes place while working with a mixer grinder?

Question 4 Mountaineers carry oxygen cylinders with them because : a) There is no oxygen on high mountains. b) There is deficiency of oxygen on mountains at high atltitude. c) oxygen is used for cooking. d) oxygen keeps them warm at low temperature.

A piece of iron is heated till it becomes red-hot. It then becomes soft and is beaten to the desired shape. What kind of changes are observed in this process– reversible or irreversible?

Rashi was in her village.There she found wheat grains mixed with powdered dry leaves.How can she separate the two of them easily? Explain the whole mechanism in detail.

Water seeps through the spaces in the ground. Where does the water get collected? What happens to this water? [3 MARKS]

The ash obtained from burning of magnesium ribbon is dissolved in water. The solution is tested by litmus paper for acidic nature. Which of the following options is/ are correct?

Which of these is a polyatomic ion? SO42−, NO3−, CO32−

Question 2 (g) State whether the following statement is true or false: Polyester is a natural fibre.

Explain the method distillation.

A substance undergoes a change in which its molecules undergo changes. What kind of change is it - physical or chemical?

An astronomical telescope has a large aperture to:

Why does oil never mix with water and always floats on top?

What is the principle used in the separation of mixtures?

what is the experimental sample and control sample ?

Every change can be classified as either physical or chemical. True or false?

Rajat collected some rainwater in a clean glass tumbler and tested it using a tester. To his surprise he found that the compass needle showed deflection. What could be the possible reason for his observation?

What is intermolecular force of attraction ?

Can water dissolve liquids and gases also?

The husk can be removed from flour by

What type of changes occur when a mixture is formed?

The magnetic properties of iron disappear when it is heated strongly. Which of these changes does this illustrate?

What kind of fabrics cannot be used for the making of clothes?

What is the difference between homogeneous and heterogeneous mixtures? Give an example of each mixture.

why water is not allowed to react with grinard reagent?

Select the appropriate option that can relate to the process of refining of petroleum.

How many of the given substances are soluble in water?Substances: Sugar, petrol, salt, vinegar, sand, oil3

Smith has a mixture of( sand+salt+hardstone+iron piece+husk+sawdust) he need the sand to get saparared from this which he can use to construct building. Suggest him different ways of saperating all the components.

Question 2 (b) State whether the following statement is true or false: Spinning is a process of making fibres.

range of sgn(e^x)?

In the treatment of water, solid impurities are allowed to settle to the bottom. This particular stage in the entire purification is called ___

What does a conservative force mean?

What is the equivalent weight of MgHPO3andMgHPO4?

In which case evaporation of water will be faster

Why are there different names for meditating particles while thier function are same

what is base ex and explaine

How is milk converted into curd? Can the milk be obtained again from the curd? What kind of change is this? [3 MARKS]

The fruits of the cotton plant are also called as:

Which of the following is true in the case of an ice cream?

What is the value of r in 18Cr

(a) Define the term 'latent heat of fusion' of a solid. How much is the latent heat of fusion of ice?(b) Draw a labelled diagram of the experimental set-up to study the latent heat of fusion of ice.