5083 + Interview Questions in Chemistry Page 42 InterviewSolution

2051.	Fire extinguiser contains :-(1)CaCO3(2)H2SO4 & NaHCO3 solution(3)NaHCO3 solution(4)CaCO3 & H2SO4 solutions
Answer» Fire extinguiser contains :- (1)CaCO3 (2)H2SO4 & NaHCO3 solution (3)NaHCO3 solution (4)CaCO3 & H2SO4 solutions

Discussion

2052.	Question 1You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?
Answer» Question 1 You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?

Discussion

2053.	Rust on iron is basically_________.
Answer» Rust on iron is basically_________.

Discussion

2054.	Knitting is another name for weaving. Do you agree? Give reasons.
Answer» Knitting is another name for weaving. Do you agree? Give reasons.

Discussion

2055.

1 2 O 3 4 5 S E 6 O M N 7 8 D O 9 L F C L N N ACROSS1. smallest particle of a compound (8)4. a state of matter (3)6. a yellow-coloured metal (4)9.to group together things with similar properties (14)DOWN2. gas we breathe in (6)3. we call iron, gold or hydrogen this (7)7. another state of matter (5)8. scientist who coined the term atom (6)

Answer»

1

²

O

³

⁴

⁵

S

E

⁶

O

M

N

⁷

⁸

D

O

⁹

L

F

C

L

N

ACROSS

1. smallest particle of a compound (8)

4. a state of matter (3)

6. a yellow-coloured metal (4)

9.to group together things with similar properties (14)

DOWN

2. gas we breathe in (6)

3. we call iron, gold or hydrogen this (7)

7. another state of matter (5)

8. scientist who coined the term atom (6)

Discussion

2056.	The rate constant for a first order reaction is 2.303×10–2 s–1. The time required to reduce 8.0 g of the reactant to 1.0 g is
Answer» The rate constant for a first order reaction is $2.303 \times 10^{- 2} s^{- 1}$ . The time required to reduce $8.0 g$ of the reactant to $1.0 g$ is

Discussion

2057.	What is the need to balance a chemical equation?
Answer» What is the need to balance a chemical equation?

Discussion

2058.	Certain amount of water percolate at the rate of 10ml/min in 50 min. Calculate the amount of water percolated.500
Answer» Certain amount of water percolate at the rate of 10ml/min in 50 min. Calculate the amount of water percolated. 500

Discussion

2059.	You have a baseball bat, and you want to determine the mass of it. You have few packs of salt, weighing 12 ounces each. You figured out that the mass of the bat is equivalent to 3 packs of salt. Determine the approximate mass of the bat in ounces.36
Answer» You have a baseball bat, and you want to determine the mass of it. You have few packs of salt, weighing 12 ounces each. You figured out that the mass of the bat is equivalent to 3 packs of salt. Determine the approximate mass of the bat in ounces. 36

Discussion

2060.	Question 18 Write a caption for each of the figures given as Figure 3.2 (a-d).
Answer» Question 18 Write a caption for each of the figures given as Figure 3.2 (a-d).

2060.

Question 18 Write a caption for each of the figures given as Figure 3.2 (a-d).

Answer»

Question 18

Write a caption for each of the figures given as Figure 3.2 (a-d).

Discussion

2061.	Burning of a coal is a physical change or a chemical change?
Answer» Burning of a coal is a physical change or a chemical change?

Discussion

2062.	Why are forest called lungs of nature?
Answer» Why are forest called lungs of nature?

Discussion

2063.	It is seen that forests remain dark during the day. Explain why this happens.
Answer» It is seen that forests remain dark during the day. Explain why this happens.

Discussion

2064.	Pick the odd one.
Answer» Pick the odd one.

Discussion

2065.	Which method will you use to get a pure liquid if it has dissolved impurities present in it?
Answer» Which method will you use to get a pure liquid if it has dissolved impurities present in it?

Discussion

2066.	The following figure shows an irreversible change because:
Answer» The following figure shows an irreversible change because:

Discussion

2067.	Write the characteristics of acids by which we can identify acids.
Answer» Write the characteristics of acids by which we can identify acids.

Discussion

2068.	28.How much heat energy is released when 5.0 g of water at 20 degree celsius changes into ice at 20 degree celsius? Take specific heat capacity of water= 4.2 J per g per K, specific latent heat of fusion of ice=336 J per g.
Answer» 28.How much heat energy is released when 5.0 g of water at 20 degree celsius changes into ice at 20 degree celsius? Take specific heat capacity of water= 4.2 J per g per K, specific latent heat of fusion of ice=336 J per g.

Discussion

2069.	The property of acid due to which it degrades the metal is called as?
Answer» The property of acid due to which it degrades the metal is called as?

Discussion

2070.	What is a super saturated solution?
Answer» What is a super saturated solution?

Discussion

2071.	9.Which of the following cannot be extracted by electrolysis from aq.solution of their salts. Zn Ag Cu Pt
Answer» 9.Which of the following cannot be extracted by electrolysis from aq.solution of their salts. Zn Ag Cu Pt

Discussion

2072.	The valency of an element depends on which of the following factors?
Answer» The valency of an element depends on which of the following factors?

Discussion

2073.	(a) Name one indicator which turns red on adding an acid.(b) Name one indicator which turns red on adding a base.
Answer» (a) Name one indicator which turns red on adding an acid. (b) Name one indicator which turns red on adding a base.

2073.

(a) Name one indicator which turns red on adding an acid.(b) Name one indicator which turns red on adding a base.

Answer»

(a) Name one indicator which turns red on adding an acid.

(b) Name one indicator which turns red on adding a base.

Discussion

2074.	Question 4 (b)What will happen if: The habitat of an animal is disturbed.
Answer» Question 4 (b) What will happen if: The habitat of an animal is disturbed.

Discussion

2075.	Percentage of oxygen in a compound is 0.8% by weight then the minimum molecular weight of compound will be?
Answer» Percentage of oxygen in a compound is 0.8% by weight then the minimum molecular weight of compound will be?

Discussion

2076.	What is tan and where to use it.
Answer» What is tan and where to use it.

Discussion

2077.	Which term is to be correctly used forexpressing concentration of electrolytes in solution?
Answer» Which term is to be correctly used for expressing concentration of electrolytes in solution?

Discussion

2078.	The process of water seepage into the ground is called
Answer» The process of water seepage into the ground is called

Discussion

2079.	If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.(a) Do you think rust is different from iron?(b) Can you change rust back into iron by some simple method?(c) Do you think the formation of rust on iron is a chemical change?(d) Give two other examples of a similar type of change.
Answer» If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust. (a) Do you think rust is different from iron? (b) Can you change rust back into iron by some simple method? (c) Do you think the formation of rust on iron is a chemical change? (d) Give two other examples of a similar type of change.

2079.

If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.(a) Do you think rust is different from iron?(b) Can you change rust back into iron by some simple method?(c) Do you think the formation of rust on iron is a chemical change?(d) Give two other examples of a similar type of change.

Answer»

If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.

(a) Do you think rust is different from iron?

(b) Can you change rust back into iron by some simple method?

(c) Do you think the formation of rust on iron is a chemical change?

(d) Give two other examples of a similar type of change.

Discussion

2080.	What are the constituent particles of ink?
Answer» What are the constituent particles of ink?

Discussion

2081.	Is chalk an element?
Answer» Is chalk an element?

Discussion

2082.	What is the difference between lime water and slaked lime, though their formulas are same?
Answer» What is the difference between lime water and slaked lime, though their formulas are same?

Discussion

2083.	What causes acid rain?
Answer» What causes acid rain?

Discussion

2084.	Which sample contains the greatest number of nitrogen atoms? (All measurements are taken at STP.)
Answer» Which sample contains the greatest number of nitrogen atoms? (All measurements are taken at STP.)

Discussion

2085.	Question 3Sewage also contains some nutrients and bacteria. Comment.
Answer» Question 3 Sewage also contains some nutrients and bacteria. Comment.

2085.

Question 3Sewage also contains some nutrients and bacteria. Comment.

Answer»

Question 3

Sewage also contains some nutrients and bacteria. Comment.

Discussion

2086.	The molar conductivity of a 0.5mol/dm3 solution of AgNO3 with electrolytic conductivity of 5.76×10−3S cm−1 at 298 K is
Answer» The molar conductivity of a $0.5 m o l / d m^{3}$ solution of $A g N O_{3}$ with electrolytic conductivity of $5.76 \times 10^{- 3} S c m^{- 1}$ at 298 K is

Discussion

2087.	Change the sentence into the passive voice. The confectioner cooled the chocolates at room temperature.
Answer» Change the sentence into the passive voice. The confectioner cooled the chocolates at room temperature.

2087.

Change the sentence into the passive voice. The confectioner cooled the chocolates at room temperature.

Answer»

Change the sentence into the passive voice.

The confectioner cooled the chocolates at room temperature.

Discussion

2088.	In the periodic table, groups are numbered in ___ numerals.
Answer» In the periodic table, groups are numbered in ___ numerals.

Discussion

2089.	Question 3Define combination reaction. Give an example of a combination reaction that is also exothermic.
Answer» Question 3 Define combination reaction. Give an example of a combination reaction that is also exothermic.

2089.

Question 3Define combination reaction. Give an example of a combination reaction that is also exothermic.

Answer»

Question 3

Define combination reaction. Give an example of a combination reaction that is also exothermic.

Discussion

2090.	Write a note on sorter’s disease
Answer» Write a note on sorter’s disease

Discussion

2091.	Bharath heated a closed vessel full of water. After some time he observed that the water started boiling. After some time there is no water inside the vessel. This is a/an____.
Answer» Bharath heated a closed vessel full of water. After some time he observed that the water started boiling. After some time there is no water inside the vessel. This is a/an____.

Discussion

2092.	Oxygen is used by living organisms during respiration but it also supports_____________.
Answer» Oxygen is used by living organisms during respiration but it also supports_____________.

Discussion

2093.	lowest iron amount in which of the following :A. Pig ironB. Cast ironC. Steel ironD. wrought iron
Answer» lowest iron amount in which of the following : A. Pig iron B. Cast iron C. Steel iron D. wrought iron

Discussion

2094.	Which scientist discovered rayon?
Answer» Which scientist discovered rayon?

Discussion

2095.	What is aromaticity
Answer» What is aromaticity

Discussion

2096.	Is their hybridization in PH4+
Answer» Is their hybridization in PH4+

Discussion

2097.	A man digging a pit found that he could dig with ease initially but digging became difficult as he went deeper. He could not dig beyond a depth of 5 feet. Provide a suitable scientific explanation.
Answer» A man digging a pit found that he could dig with ease initially but digging became difficult as he went deeper. He could not dig beyond a depth of 5 feet. Provide a suitable scientific explanation.

Discussion

2098.	Define sublimation. How is sublimation different from melting? Give few examples of substances that undergo sublimation.
Answer» Define sublimation. How is sublimation different from melting? Give few examples of substances that undergo sublimation.

Discussion

2099.	When non-metallic oxides are dissolved in rainwater and _____ are formed
Answer» When non-metallic oxides are dissolved in rainwater and _____ are formed

Discussion

2100.	for metals amd non.metals.high reduction potential reduces one with lowerRP or Lower will replace one with higher RP??
Answer» for metals amd non.metals.high reduction potential reduces one with lowerRP or Lower will replace one with higher RP??

Discussion

Explore topic-wise InterviewSolutions in .

Fire extinguiser contains :-(1)CaCO3(2)H2SO4 & NaHCO3 solution(3)NaHCO3 solution(4)CaCO3 & H2SO4 solutions

Question 1You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?

Rust on iron is basically_________.

Knitting is another name for weaving. Do you agree? Give reasons.

The rate constant for a first order reaction is 2.303×10–2 s–1. The time required to reduce 8.0 g of the reactant to 1.0 g is

What is the need to balance a chemical equation?

Certain amount of water percolate at the rate of 10ml/min in 50 min. Calculate the amount of water percolated.500

You have a baseball bat, and you want to determine the mass of it. You have few packs of salt, weighing 12 ounces each. You figured out that the mass of the bat is equivalent to 3 packs of salt. Determine the approximate mass of the bat in ounces.36

Question 18 Write a caption for each of the figures given as Figure 3.2 (a-d).

Burning of a coal is a physical change or a chemical change?

Why are forest called lungs of nature?

It is seen that forests remain dark during the day. Explain why this happens.

Pick the odd one.

Which method will you use to get a pure liquid if it has dissolved impurities present in it?

The following figure shows an irreversible change because:

Write the characteristics of acids by which we can identify acids.

28.How much heat energy is released when 5.0 g of water at 20 degree celsius changes into ice at 20 degree celsius? Take specific heat capacity of water= 4.2 J per g per K, specific latent heat of fusion of ice=336 J per g.

The property of acid due to which it degrades the metal is called as?

What is a super saturated solution?

9.Which of the following cannot be extracted by electrolysis from aq.solution of their salts. Zn Ag Cu Pt

The valency of an element depends on which of the following factors?

(a) Name one indicator which turns red on adding an acid.(b) Name one indicator which turns red on adding a base.

Question 4 (b)What will happen if: The habitat of an animal is disturbed.

Percentage of oxygen in a compound is 0.8% by weight then the minimum molecular weight of compound will be?

What is tan and where to use it.

Which term is to be correctly used forexpressing concentration of electrolytes in solution?

The process of water seepage into the ground is called

What are the constituent particles of ink?

Is chalk an element?

What is the difference between lime water and slaked lime, though their formulas are same?

What causes acid rain?

Which sample contains the greatest number of nitrogen atoms? (All measurements are taken at STP.)

Question 3Sewage also contains some nutrients and bacteria. Comment.

The molar conductivity of a 0.5mol/dm3 solution of AgNO3 with electrolytic conductivity of 5.76×10−3S cm−1 at 298 K is

Change the sentence into the passive voice. The confectioner cooled the chocolates at room temperature.

In the periodic table, groups are numbered in ___ numerals.

Question 3Define combination reaction. Give an example of a combination reaction that is also exothermic.

Write a note on sorter’s disease

Bharath heated a closed vessel full of water. After some time he observed that the water started boiling. After some time there is no water inside the vessel. This is a/an____.

Oxygen is used by living organisms during respiration but it also supports_____________.

lowest iron amount in which of the following :A. Pig ironB. Cast ironC. Steel ironD. wrought iron

Which scientist discovered rayon?

What is aromaticity

Is their hybridization in PH4+

A man digging a pit found that he could dig with ease initially but digging became difficult as he went deeper. He could not dig beyond a depth of 5 feet. Provide a suitable scientific explanation.

Define sublimation. How is sublimation different from melting? Give few examples of substances that undergo sublimation.

When non-metallic oxides are dissolved in rainwater and _____ are formed

for metals amd non.metals.high reduction potential reduces one with lowerRP or Lower will replace one with higher RP??