7248 + Interview Questions in Chemistry Page 90 InterviewSolution

4451.	Given, the work done in blowing a bubble against surface tensional forces of volume V is W. Then find the work done in blowing the bubble of volume 2V from the same soap solution.
Answer» Given, the work done in blowing a bubble against surface tensional forces of volume V is W. Then find the work done in blowing the bubble of volume 2V from the same soap solution.

Discussion

4452.	What are the fuels used in the rocket propellant or engine (both solid and liquid).
Answer» What are the fuels used in the rocket propellant or engine (both solid and liquid).

Discussion

4453.	Chemical effect of electric current is primarily used for which of the following?
Answer» Chemical effect of electric current is primarily used for which of the following?

Discussion

4454.	Why should we consume fossil fuel at a slower rate?
Answer» Why should we consume fossil fuel at a slower rate?

Discussion

4455.	How are coal and petroleum formed?
Answer» How are coal and petroleum formed?

Discussion

4456.	Which of the following is a suspension?
Answer» Which of the following is a suspension?

Discussion

4457.	Please describe the formation of coal process.
Answer» Please describe the formation of coal process.

Discussion

4458.	When magnesium is burned with hydrochloric acid, a pop sound is heard when a glowing splint is brought near the beaker. It is because:
Answer» When magnesium is burned with hydrochloric acid, a pop sound is heard when a glowing splint is brought near the beaker. It is because:

Discussion

4459.	Mention 4 substances that shows change of state A) at normal temperature B) at high temperature
Answer» Mention 4 substances that shows change of state A) at normal temperature B) at high temperature

4459.

Mention 4 substances that shows change of state A) at normal temperature B) at high temperature

Answer»

Mention 4 substances that shows change of state

A) at normal temperature

B) at high temperature

Discussion

4460.	What is global warming ? Name the gas whose increasing percentage in air is leading to global warming. State a harmful effect which can be caused by global warming.
Answer» What is global warming ? Name the gas whose increasing percentage in air is leading to global warming. State a harmful effect which can be caused by global warming.

Discussion

4461.	On getting the smell of LPG gas leak, we should ___.
Answer» On getting the smell of LPG gas leak, we should ___.

Discussion

4462.	Few properties are mentioned below. Specify whether these properties belong to mixtures or compounds: STATEMENT 1: The constituents can be separated easily by physical means. STATEMENT 2: Has a variable composition. STATEMENT 3: The composition is always fixed. STATEMENT 4: Shows entirely different properties from constituent elements.
Answer» Few properties are mentioned below. Specify whether these properties belong to mixtures or compounds: STATEMENT 1: The constituents can be separated easily by physical means. STATEMENT 2: Has a variable composition. STATEMENT 3: The composition is always fixed. STATEMENT 4: Shows entirely different properties from constituent elements.

4462.

Few properties are mentioned below. Specify whether these properties belong to mixtures or compounds: STATEMENT 1: The constituents can be separated easily by physical means. STATEMENT 2: Has a variable composition. STATEMENT 3: The composition is always fixed. STATEMENT 4: Shows entirely different properties from constituent elements.

Answer»

Few properties are mentioned below. Specify whether these properties belong to mixtures or compounds:

STATEMENT 1: The constituents can be separated easily by physical means.

STATEMENT 2: Has a variable composition.

STATEMENT 3: The composition is always fixed.

STATEMENT 4: Shows entirely different properties from constituent elements.

Discussion

4463.	Select the fuel used in the picture shown:
Answer» Select the fuel used in the picture shown:

Discussion

4464.	Which is the most electropositive metal?
Answer» Which is the most electropositive metal?

Discussion

4465.	What are the characteristics of a mixture? Explain with an example of each. [5 MARKS]
Answer» What are the characteristics of a mixture? Explain with an example of each. [5 MARKS]

Discussion

4466.	Naveen studied the characteristics of three metals X, Y and Z, when exposed to moist air. Following observations were made: MetalColour changeXGreen coatingYBrownish redZNo change Identify the probable metals Naveen had.
Answer» Naveen studied the characteristics of three metals X, Y and Z, when exposed to moist air. Following observations were made: $\begin{matrix} M e t a l & C o l o u r c h a n g e X & G r e e n c o a t i n g Y & B r o w n i s h r e d Z & N o c h a n g e \end{matrix}$ Identify the probable metals Naveen had.

Discussion

4467.	Based upon the type of fire, extinguishers are chosen. Explain the different types of fires. [5 MARKS]
Answer» Based upon the type of fire, extinguishers are chosen. Explain the different types of fires. [5 MARKS]

Discussion

4468.	Which of the following metals on reacting with sodium hydroxide solution produce hydrogen gas? A. Cu B. Al C. Fe D. Zn
Answer» Which of the following metals on reacting with sodium hydroxide solution produce hydrogen gas? A. Cu B. Al C. Fe D. Zn

Discussion

4469.	Food cans are coated with tin and not with zinc because:
Answer» Food cans are coated with tin and not with zinc because:

Discussion

4470.	Fractional distillation refers to:
Answer» Fractional distillation refers to:

Discussion

4471.	If the velocity of a moving car is reduced to half its original velocity, its kinetic energy would
Answer» If the velocity of a moving car is reduced to half its original velocity, its kinetic energy would

Discussion

4472.	Substances whose two or more components completely mix with each other to make a uniform composition are called:
Answer» Substances whose two or more components completely mix with each other to make a uniform composition are called:

Discussion

4473.	Name any two diseases caused by drinking polluted water containing sewage.
Answer» Name any two diseases caused by drinking polluted water containing sewage.

Discussion

4474.	Which of the given statement is incorrect in regard to the law of conservation of energy?
Answer» Which of the given statement is incorrect in regard to the law of conservation of energy?

Discussion

4475.	PbS is the chemical formula for which mineral?
Answer» PbS is the chemical formula for which mineral?

Discussion

4476.	Coal gas mainly contains :
Answer» Coal gas mainly contains :

Discussion

4477.	Question 31 Imagine that all the exhaustible natural resources are exhausted by human activities. Do you think survival of living beings would be possible? If yes, why?If not, why not?
Answer» Question 31 Imagine that all the exhaustible natural resources are exhausted by human activities. Do you think survival of living beings would be possible? If yes, why?If not, why not?

Discussion

4478.	Which of the following are man made sources of air pollution?
Answer» Which of the following are man made sources of air pollution?

Discussion

4479.	Why is soda-acid fire extinguisher used?
Answer» Why is soda-acid fire extinguisher used?

Discussion

4480.	Why erasers become hard after some months or years?
Answer» Why erasers become hard after some months or years?

Discussion

4481.	If rusting of iron is a chemical change than how it converts back to its original form (iron). As I have seen that if we pore cold drinks on rusting iron and keep it for sometimes. And then if we wash the iron with water than it will convert back to its original form. I have seen with my own eyes......
Answer» If rusting of iron is a chemical change than how it converts back to its original form (iron). As I have seen that if we pore cold drinks on rusting iron and keep it for sometimes. And then if we wash the iron with water than it will convert back to its original form. I have seen with my own eyes......

Discussion

4482.	Which of the following is not used in making matchsticks these days ? (a) potassium chlorate (b) white phosphorus (c) antimony trisulphide (d) red phosphorus
Answer» Which of the following is not used in making matchsticks these days ? (a) potassium chlorate (b) white phosphorus (c) antimony trisulphide (d) red phosphorus

4482.

Which of the following is not used in making matchsticks these days ? (a) potassium chlorate (b) white phosphorus (c) antimony trisulphide (d) red phosphorus

Answer»

Which of the following is not used in making matchsticks these days ?

(a) potassium chlorate

(b) white phosphorus

(c) antimony trisulphide

(d) red phosphorus

Discussion

4483.	If the formula of a metal nitride is MN, the formula of the metal sulphate will be?
Answer» If the formula of a metal nitride is MN, the formula of the metal sulphate will be?

Discussion

4484.	If 10 gms of Mg react with 20 gms of O2, then how many grams of MgO is formed?
Answer» If 10 gms of $M g$ react with 20 gms of $O_{2}$ , then how many grams of $M g O$ is formed?

Discussion

4485.	Which of the following statement(s) is/are correct for mixtures?
Answer» Which of the following statement(s) is/are correct for mixtures?

Discussion

4486.	why oxygen is needed to candle to tight up?
Answer» why oxygen is needed to candle to tight up?

Discussion

4487.	An electric spark is passed between two electrodes placed near Each Other inside a tightly closed in can full of petrol and diesel will the petrol and diesel catch fire give reason in support of your answer
Answer» An electric spark is passed between two electrodes placed near Each Other inside a tightly closed in can full of petrol and diesel will the petrol and diesel catch fire give reason in support of your answer

Discussion

4488.	How did the discovery of isotopes contradict Dalton's atomic theory?
Answer» How did the discovery of isotopes contradict Dalton's atomic theory?

Discussion

4489.	______is used in metalling of roads.
Answer» ______is used in metalling of roads.

Discussion

4490.	In solids, during melting, as temperature increases the interparticle forces will ___
Answer» In solids, during melting, as temperature increases the interparticle forces will ___

Discussion

4491.	Identify the pollutant gases which are responsible for the discolouration of marbles in the Taj Mahal.
Answer» Identify the pollutant gases which are responsible for the discolouration of marbles in the Taj Mahal.

Discussion

4492.	If a turbine is built across a fast flowing stream of river without building a dam, what energy conversion will happen for power generation?
Answer» If a turbine is built across a fast flowing stream of river without building a dam, what energy conversion will happen for power generation?

Discussion

4493.	Choose which of the following statement(s) are correct?
Answer» Choose which of the following statement(s) are correct?

Discussion

4494.	Can we make the water by taking hydrogen and oxygen?
Answer» Can we make the water by taking hydrogen and oxygen?

Discussion

4495.	Bharath heated a closed vessel full of water. After some time he observed that the water started boiling and after some more time there is no water in the vessel. This is an example of:
Answer» Bharath heated a closed vessel full of water. After some time he observed that the water started boiling and after some more time there is no water in the vessel. This is an example of:

Discussion

4496.	What are mineral acids??
Answer» What are mineral acids??

Discussion

4497.	Why the Iron pillar in Delhi do not get rusted?
Answer» Why the Iron pillar in Delhi do not get rusted?

Discussion

4498.	Which non-metal is a good conductor of both heat and electricity?
Answer» Which non-metal is a good conductor of both heat and electricity?

Discussion

4499.	Change the sentence to direct speech. The baker said he had been baking the cake until then.
Answer» Change the sentence to direct speech. The baker said he had been baking the cake until then.

4499.

Change the sentence to direct speech. The baker said he had been baking the cake until then.

Answer»

Change the sentence to direct speech.

The baker said he had been baking the cake until then.

Discussion

4500.	When we are talking about the nth shell, how many electrons can it house?
Answer» When we are talking about the $n^{t h}$ shell, how many electrons can it house?

Discussion

Explore topic-wise InterviewSolutions in .

Given, the work done in blowing a bubble against surface tensional forces of volume V is W. Then find the work done in blowing the bubble of volume 2V from the same soap solution.

What are the fuels used in the rocket propellant or engine (both solid and liquid).

Chemical effect of electric current is primarily used for which of the following?

Why should we consume fossil fuel at a slower rate?

How are coal and petroleum formed?

Which of the following is a suspension?

Please describe the formation of coal process.

When magnesium is burned with hydrochloric acid, a pop sound is heard when a glowing splint is brought near the beaker. It is because:

Mention 4 substances that shows change of state A) at normal temperature B) at high temperature

What is global warming ? Name the gas whose increasing percentage in air is leading to global warming. State a harmful effect which can be caused by global warming.

On getting the smell of LPG gas leak, we should ___.

Select the fuel used in the picture shown:

Which is the most electropositive metal?

What are the characteristics of a mixture? Explain with an example of each. [5 MARKS]

Naveen studied the characteristics of three metals X, Y and Z, when exposed to moist air. Following observations were made: MetalColour changeXGreen coatingYBrownish redZNo change Identify the probable metals Naveen had.

Based upon the type of fire, extinguishers are chosen. Explain the different types of fires. [5 MARKS]

Which of the following metals on reacting with sodium hydroxide solution produce hydrogen gas? A. Cu B. Al C. Fe D. Zn

Food cans are coated with tin and not with zinc because:

Fractional distillation refers to:

If the velocity of a moving car is reduced to half its original velocity, its kinetic energy would

Substances whose two or more components completely mix with each other to make a uniform composition are called:

Name any two diseases caused by drinking polluted water containing sewage.

Which of the given statement is incorrect in regard to the law of conservation of energy?

PbS is the chemical formula for which mineral?

Coal gas mainly contains :

Question 31 Imagine that all the exhaustible natural resources are exhausted by human activities. Do you think survival of living beings would be possible? If yes, why?If not, why not?

Which of the following are man made sources of air pollution?

Why is soda-acid fire extinguisher used?

Why erasers become hard after some months or years?

Which of the following is not used in making matchsticks these days ? (a) potassium chlorate (b) white phosphorus (c) antimony trisulphide (d) red phosphorus

If the formula of a metal nitride is MN, the formula of the metal sulphate will be?

If 10 gms of Mg react with 20 gms of O2, then how many grams of MgO is formed?

Which of the following statement(s) is/are correct for mixtures?

why oxygen is needed to candle to tight up?

An electric spark is passed between two electrodes placed near Each Other inside a tightly closed in can full of petrol and diesel will the petrol and diesel catch fire give reason in support of your answer

How did the discovery of isotopes contradict Dalton's atomic theory?

______is used in metalling of roads.

In solids, during melting, as temperature increases the interparticle forces will ___

Identify the pollutant gases which are responsible for the discolouration of marbles in the Taj Mahal.

If a turbine is built across a fast flowing stream of river without building a dam, what energy conversion will happen for power generation?

Choose which of the following statement(s) are correct?

Can we make the water by taking hydrogen and oxygen?

Bharath heated a closed vessel full of water. After some time he observed that the water started boiling and after some more time there is no water in the vessel. This is an example of:

What are mineral acids??

Why the Iron pillar in Delhi do not get rusted?

Which non-metal is a good conductor of both heat and electricity?

Change the sentence to direct speech. The baker said he had been baking the cake until then.

When we are talking about the nth shell, how many electrons can it house?