3275 + Interview Questions in Chemistry Page 37 InterviewSolution

1801.	Question 5 Take out a cooled bottle of water from refrigerator and keep it on a table. After some time you notice a puddle of water around it. Why?
Answer» Question 5 Take out a cooled bottle of water from refrigerator and keep it on a table. After some time you notice a puddle of water around it. Why?

1801.

Question 5 Take out a cooled bottle of water from refrigerator and keep it on a table. After some time you notice a puddle of water around it. Why?

Answer»

Question 5

Take out a cooled bottle of water from refrigerator and keep it on a table. After some time you notice a puddle of water around it. Why?

Discussion

1802.	Why is burning a candle an irreversible change?
Answer» Why is burning a candle an irreversible change?

Discussion

1803.	Draw a diagram to show how seawater reaches a lake or pond.
Answer» Draw a diagram to show how seawater reaches a lake or pond.

Discussion

1804.	Wavy curve method
Answer» Wavy curve method

Discussion

1805.	How is the pitch of sound in a guitar changed if:(a) thin string is used(b) string under less tension is used?
Answer» How is the pitch of sound in a guitar changed if: (a) thin string is used (b) string under less tension is used?

Discussion

1806.	Tearing of paper is irreversible. It is, therefore, a chemical change. Do you agree? Give reasons.
Answer» Tearing of paper is irreversible. It is, therefore, a chemical change. Do you agree? Give reasons.

Discussion

1807.	Briefly explain about useful and harmful changes.
Answer» Briefly explain about useful and harmful changes.

Discussion

1808.	Say whether the following statements are true or false. (a) Growth in living things takes place from the inside. (b) To exhale is to take oxygen from the air into the body. (c) Human beings continue to grow all their life. (d) Plants respire.
Answer» Say whether the following statements are true or false. (a) Growth in living things takes place from the inside. (b) To exhale is to take oxygen from the air into the body. (c) Human beings continue to grow all their life. (d) Plants respire.

1808.

Say whether the following statements are true or false. (a) Growth in living things takes place from the inside. (b) To exhale is to take oxygen from the air into the body. (c) Human beings continue to grow all their life. (d) Plants respire.

Answer»

Say whether the following statements are true or false.

(a) Growth in living things takes place from the inside.

(b) To exhale is to take oxygen from the air into the body.

(c) Human beings continue to grow all their life.

(d) Plants respire.

Discussion

1809.	find the range of y={x}/1+{x
Answer» find the range of y={x}/1+{x

Discussion

1810.	Givenbelow are the names of some objects and materials:Water,basket ball, orange, sugar, globe, apple, and earthen pitcherGroup themas:(a) Roundshaped and other shapes(b) Eatablesand non-eatables
Answer» Given below are the names of some objects and materials: Water, basket ball, orange, sugar, globe, apple, and earthen pitcher Group them as: (a) Round shaped and other shapes (b) Eatables and non-eatables

1810.

Givenbelow are the names of some objects and materials:Water,basket ball, orange, sugar, globe, apple, and earthen pitcherGroup themas:(a) Roundshaped and other shapes(b) Eatablesand non-eatables

Answer»

Given
below are the names of some objects and materials:

Water,
basket ball, orange, sugar, globe, apple, and earthen pitcher

Group them
as:

(a) Round
shaped and other shapes

(b) Eatables
and non-eatables

Discussion

1811.	18. For dissociation of PCL5 into pcl3 and cl2 which is incorrect (1)d 20%>d 30%>d 50%>(d---------> vapor density of equilibrium ) mix at certain decomposition (2)D/d =1+2α ( D : initial vapor density d : vapor density of equilibrium mixture) (3)graph (4)graph
Answer» 18. For dissociation of PCL5 into pcl3 and cl2 which is incorrect (1)d 20%>d 30%>d 50%>(d---------> vapor density of equilibrium ) mix at certain decomposition (2)D/d =1+2α ( D : initial vapor density d : vapor density of equilibrium mixture) (3)graph (4)graph

Discussion

1812.	A small block of mass m is suspended with the help of a spring from ceiling of an elevator which is accelerating downwards with acceleration a. The block is in equilibrium with respect to the elevator. The ratio of work done by the spring, as observed by a man in the elevator to that by a man on the ground, on the block in time t will be?(Also give free body diagram)
Answer» A small block of mass m is suspended with the help of a spring from ceiling of an elevator which is accelerating downwards with acceleration a. The block is in equilibrium with respect to the elevator. The ratio of work done by the spring, as observed by a man in the elevator to that by a man on the ground, on the block in time t will be? (Also give free body diagram)

Discussion

1813.	A 3:1 molar mixture of He and CH4 is contained in a vessel,the gas mixture leaks out.The composition of the mixture effusing out initially is
Answer» A 3:1 molar mixture of He and CH4 is contained in a vessel,the gas mixture leaks out.The composition of the mixture effusing out initially is

Discussion

1814.	Define isotropy and anisotropy
Answer» Define isotropy and anisotropy

Discussion

1815.	What is homogenous and hetroghetero medium of light
Answer» What is homogenous and hetroghetero medium of light

Discussion

1816.	How does fibre change to fabric?
Answer» How does fibre change to fabric?

Discussion

1817.	The unit in which the solubility product of barium phosphate is expressed is - a) mol2dm-2 b) mol3dm-9 c) mol4dm-12 d) mol5dm-15
Answer» The unit in which the solubility product of barium phosphate is expressed is - a) mol2dm-2 b) mol3dm-9 c) mol4dm-12 d) mol5dm-15

Discussion

1818.	Write a few properties of glass.
Answer» Write a few properties of glass.

Discussion

1819.	65.10g of ice at -20 C is dropped into a calorimeter containing 10g water at 10 C. The specific heat of water is twice that of ice. When equilibrium is reached, the calorimeter will contain- a) 10g ice 10 g water b) 20g water c) 5g ice 15g of water d) 20g ice
Answer» 65.10g of ice at -20 C is dropped into a calorimeter containing 10g water at 10 C. The specific heat of water is twice that of ice. When equilibrium is reached, the calorimeter will contain- a) 10g ice 10 g water b) 20g water c) 5g ice 15g of water d) 20g ice

Discussion

1820.	Jute grows best in areas that get ___________ (heavy/moderate/low) rainfall.
Answer» Jute grows best in areas that get ___________ (heavy/moderate/low) rainfall.

Discussion

1821.	896 mL of a mixture of CO and CO2 weigh 1.28 gat NTP. Calculate the volume of CO, in the mixtureat NTP.
Answer» 896 mL of a mixture of CO and CO2 weigh 1.28 gat NTP. Calculate the volume of CO, in the mixtureat NTP.

Discussion

1822.	What would happen to following items after mixing and keeping them in water for 2 minutes?1. Salt2. Soil
Answer» What would happen to following items after mixing and keeping them in water for 2 minutes? 1. Salt 2. Soil

Discussion

1823.	Fill inthe blanks:(a) Plantfibres are obtained from ________ and ________.(b) Animalfibres are ________ and ________.
Answer» Fill in the blanks: (a) Plant fibres are obtained from ________ and ________. (b) Animal fibres are ________ and ________.

1823.

Fill inthe blanks:(a) Plantfibres are obtained from and .(b) Animalfibres are and .

Answer»

Fill in
the blanks:

(a) Plant
fibres are obtained from ________ and ________.

(b) Animal
fibres are ________ and ________.

Discussion

1824.	From where do the following usually get water? In which form is water present in them?(a) Clouds(b) Plants(c) Mountain tops(d) Aquifer(e) Animals
Answer» From where do the following usually get water? In which form is water present in them? (a) Clouds (b) Plants (c) Mountain tops (d) Aquifer (e) Animals

Discussion

1825.	A metal with low melting and boiling points is ________
Answer» A metal with low melting and boiling points is ________

Discussion

1826.	What are fibers are made up of ?
Answer» What are fibers are made up of ?

Discussion

1827.	Carbon + X → Carbon dioxide. Identify the gas X.
Answer» Carbon + $X$ $\to$ Carbon dioxide. Identify the gas $X$ .

Discussion

1828.	What are the two main types of habitats for animals? Define them. [2 MARKS]
Answer» What are the two main types of habitats for animals? Define them. [2 MARKS]

Discussion

1829.	Explain why modern houses in cities are stronger than old houses in villages.
Answer» Explain why modern houses in cities are stronger than old houses in villages.

Discussion

1830.	49. no. of antibonding e- pair in O2-
Answer» 49. no. of antibonding e- pair in O2-

Discussion

1831.	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

1832.	List allitems known to you that float on water. Check and see if they willfloat on oil or kerosene.
Answer» List all items known to you that float on water. Check and see if they will float on oil or kerosene.

Discussion

1833.	Identify yarn from the given images.
Answer» Identify yarn from the given images.

Discussion

1834.	Classify the following as molecules of elements or compounds. Water, methane, ozone, phosphorus, nitrogen, slaked lime, salt, vinegar, calcium carbonate.
Answer» Classify the following as molecules of elements or compounds. Water, methane, ozone, phosphorus, nitrogen, slaked lime, salt, vinegar, calcium carbonate.

Discussion

1835.	What is ideal gas and real gas?
Answer» What is ideal gas and real gas?

Discussion

1836.	Which of the following is not a result of evaporation?
Answer» Which of the following is not a result of evaporation?

Discussion

1837.	I am not able to understand the differnce betwwen ions, compounds , elements & mixtures
Answer» I am not able to understand the differnce betwwen ions, compounds , elements & mixtures

Discussion

1838.	Why is water scare in Rajasthan?
Answer» Why is water scare in Rajasthan?

Discussion

1839.	y=lnx/x then dy/dx will be :
Answer» y=lnx/x then dy/dx will be :

Discussion

1840.	Which of these is a reversible change?(a) milk turning into curd(b) burning of wax(c) melting of wax(d) rusting of iron
Answer» Which of these is a reversible change? (a) milk turning into curd (b) burning of wax (c) melting of wax (d) rusting of iron

Discussion

1841.	The velocity of light in glass is __________than that in diamond.
Answer» The velocity of light in glass is __________than that in diamond.

Discussion

1842.	Question 25What do CFCs stand for? Name some devices where CFCs are used. Why CFCs are considered as pollutants?
Answer» Question 25 What do CFCs stand for? Name some devices where CFCs are used. Why CFCs are considered as pollutants?

Discussion

1843.	In Fig. 17.15, 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 Fig. 17.15, 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.

1843.

In Fig. 17.15, 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 Fig. 17.15, 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

1844.	How are minerals absorbed by plants?
Answer» How are minerals absorbed by plants?

Discussion

1845.	Which of the following relation is correct?(1) Volume strength of H2O2-56% Normality(2) Volume strength of H2O2 11.2x Molarity(3) 100 volume, H2O230% H2O2(4) All of these
Answer» Which of the following relation is correct?(1) Volume strength of H2O2-56% Normality(2) Volume strength of H2O2 11.2x Molarity(3) 100 volume, H2O230% H2O2(4) All of these

Discussion

1846.	Why do we need to separate different components of a mixture?
Answer» Why do we need to separate different components of a mixture?

Discussion

1847.	Long chimneys in factories are to ________.
Answer» Long chimneys in factories are to ________.

Discussion

1848.	Why does science undergo change?
Answer» Why does science undergo change?

Discussion

1849.	What are the stages in the history of the development of clothing material, also discuss the evolution of artificial fibre.
Answer» What are the stages in the history of the development of clothing material, also discuss the evolution of artificial fibre.

Discussion

1850.	Ice gets converted into liquid water by:
Answer» Ice gets converted into liquid water by:

Discussion

Explore topic-wise InterviewSolutions in .

Question 5 Take out a cooled bottle of water from refrigerator and keep it on a table. After some time you notice a puddle of water around it. Why?

Why is burning a candle an irreversible change?

Draw a diagram to show how seawater reaches a lake or pond.

Wavy curve method

How is the pitch of sound in a guitar changed if:(a) thin string is used(b) string under less tension is used?

Tearing of paper is irreversible. It is, therefore, a chemical change. Do you agree? Give reasons.

Briefly explain about useful and harmful changes.

Say whether the following statements are true or false. (a) Growth in living things takes place from the inside. (b) To exhale is to take oxygen from the air into the body. (c) Human beings continue to grow all their life. (d) Plants respire.

find the range of y={x}/1+{x

Givenbelow are the names of some objects and materials:Water,basket ball, orange, sugar, globe, apple, and earthen pitcherGroup themas:(a) Roundshaped and other shapes(b) Eatablesand non-eatables

18. For dissociation of PCL5 into pcl3 and cl2 which is incorrect (1)d 20%>d 30%>d 50%>(d---------> vapor density of equilibrium ) mix at certain decomposition (2)D/d =1+2α ( D : initial vapor density d : vapor density of equilibrium mixture) (3)graph (4)graph

A 3:1 molar mixture of He and CH4 is contained in a vessel,the gas mixture leaks out.The composition of the mixture effusing out initially is

Define isotropy and anisotropy

What is homogenous and hetroghetero medium of light

How does fibre change to fabric?

The unit in which the solubility product of barium phosphate is expressed is - a) mol2dm-2 b) mol3dm-9 c) mol4dm-12 d) mol5dm-15

Write a few properties of glass.

65.10g of ice at -20 C is dropped into a calorimeter containing 10g water at 10 C. The specific heat of water is twice that of ice. When equilibrium is reached, the calorimeter will contain- a) 10g ice 10 g water b) 20g water c) 5g ice 15g of water d) 20g ice

Jute grows best in areas that get ___________ (heavy/moderate/low) rainfall.

896 mL of a mixture of CO and CO2 weigh 1.28 gat NTP. Calculate the volume of CO, in the mixtureat NTP.

What would happen to following items after mixing and keeping them in water for 2 minutes?1. Salt2. Soil

Fill inthe blanks:(a) Plantfibres are obtained from ________ and ________.(b) Animalfibres are ________ and ________.

From where do the following usually get water? In which form is water present in them?(a) Clouds(b) Plants(c) Mountain tops(d) Aquifer(e) Animals

A metal with low melting and boiling points is ________

What are fibers are made up of ?

Carbon + X → Carbon dioxide. Identify the gas X.

What are the two main types of habitats for animals? Define them. [2 MARKS]

Explain why modern houses in cities are stronger than old houses in villages.

49. no. of antibonding e- pair in O2-

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

List allitems known to you that float on water. Check and see if they willfloat on oil or kerosene.

Identify yarn from the given images.

Classify the following as molecules of elements or compounds. Water, methane, ozone, phosphorus, nitrogen, slaked lime, salt, vinegar, calcium carbonate.

What is ideal gas and real gas?

Which of the following is not a result of evaporation?

I am not able to understand the differnce betwwen ions, compounds , elements & mixtures

Why is water scare in Rajasthan?

y=lnx/x then dy/dx will be :

Which of these is a reversible change?(a) milk turning into curd(b) burning of wax(c) melting of wax(d) rusting of iron

The velocity of light in glass is __________than that in diamond.

Question 25What do CFCs stand for? Name some devices where CFCs are used. Why CFCs are considered as pollutants?

In Fig. 17.15, 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.

How are minerals absorbed by plants?

Which of the following relation is correct?(1) Volume strength of H2O2-56% Normality(2) Volume strength of H2O2 11.2x Molarity(3) 100 volume, H2O230% H2O2(4) All of these

Why do we need to separate different components of a mixture?

Long chimneys in factories are to ________.

Why does science undergo change?

What are the stages in the history of the development of clothing material, also discuss the evolution of artificial fibre.

Ice gets converted into liquid water by:

Fill inthe blanks:(a) Plantfibres are obtained from and .(b) Animalfibres are and .

In Fig. 17.15, 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.