7248 + Interview Questions in Chemistry Page 6 InterviewSolution

251.	21. Types of hydrocarbon
Answer» 21. Types of hydrocarbon

Discussion

252.	Reaction of metals with water
Answer» Reaction of metals with water

Discussion

253.	Why in Cathode Ray Discharge experiment, Rays are generated only from Cathode?
Answer» Why in Cathode Ray Discharge experiment, Rays are generated only from Cathode?

Discussion

254.	How to know if final kinetic energy is zero or final potential energy is zero while solving energy conservation related problems?
Answer» How to know if final kinetic energy is zero or final potential energy is zero while solving energy conservation related problems?

Discussion

255.	With respect to the given assertion and reason. Choose the correct option.Assertion [A]: With an increase in the temperature of a gas inside a container, its pressure also increases.Reason [R]: Upon heating, the kinetic energy of the gas molecules increases, which in turn results in a greater force exerted on the walls of the container.
Answer» With respect to the given assertion and reason. Choose the correct option. Assertion [A]: With an increase in the temperature of a gas inside a container, its pressure also increases. Reason [R]: Upon heating, the kinetic energy of the gas molecules increases, which in turn results in a greater force exerted on the walls of the container.

Discussion

256.	Silvery grey iron fillings are added to yellow sulphur powder in a test tube. The contents of the test tube were strongly heated until they glow red. On cooling it forms a grey dull solid. Which statement is correct about the contents of the test tube in the experiment?
Answer» Silvery grey iron fillings are added to yellow sulphur powder in a test tube. The contents of the test tube were strongly heated until they glow red. On cooling it forms a grey dull solid. Which statement is correct about the contents of the test tube in the experiment?

256.

Silvery grey iron fillings are added to yellow sulphur powder in a test tube. The contents of the test tube were strongly heated until they glow red. On cooling it forms a grey dull solid. Which statement is correct about the contents of the test tube in the experiment?

Answer»

Silvery grey iron fillings are added to yellow sulphur powder in a test tube. The contents of the test tube were strongly heated until they glow red. On cooling it forms a grey dull solid. Which statement is correct about the contents of the test tube in the experiment?

Discussion

257.	Which gas was filled in the cathode ray discharge tube experiment invented by J.J. Thomson?
Answer» Which gas was filled in the cathode ray discharge tube experiment invented by J.J. Thomson?

Discussion

258.	(i) What is meant by 'diffusion'? Give one example of diffusion in gases.(ii) Why do gases diffuse very fast?(iii) Name two gases of air which dissolve in water by diffusion. What is the importance of this process in nature?
Answer» (i) What is meant by 'diffusion'? Give one example of diffusion in gases. (ii) Why do gases diffuse very fast? (iii) Name two gases of air which dissolve in water by diffusion. What is the importance of this process in nature?

Discussion

259.	Ice cubes in cola could be classified as
Answer» Ice cubes in cola could be classified as

Discussion

260.	Synthetic dyes are obtained from:
Answer» Synthetic dyes are obtained from:

Discussion

261.	Shopkeepers prefer to keep eatables in plastic containers because:
Answer» Shopkeepers prefer to keep eatables in plastic containers because:

Discussion

262.	Explain faciliated division
Answer» Explain faciliated division

Discussion

263.	What do you mean by element?
Answer» What do you mean by element?

Discussion

264.	How water vapour is greenhouse gas and leds to global warming?
Answer» How water vapour is greenhouse gas and leds to global warming?

Discussion

265.	Why acrylics not spun from the melt ?
Answer» Why acrylics not spun from the melt ?

Discussion

266.	Choose the correct statement:
Answer» Choose the correct statement:

Discussion

267.	When a gas is filled in a closed vessel is heated through 1 Degree Celsius its pressure is increased by 0.4% age the initial temperature of the gas was?
Answer» When a gas is filled in a closed vessel is heated through 1 Degree Celsius its pressure is increased by 0.4% age the initial temperature of the gas was?

Discussion

268.	The suspended particles released by combustion of coal in air may lead to a health disease. Select the correct option.
Answer» The suspended particles released by combustion of coal in air may lead to a health disease. Select the correct option.

Discussion

269.	What are electrons ??
Answer» What are electrons ??

Discussion

270.	Why is iron sulphide a compound?
Answer» Why is iron sulphide a compound?

Discussion

271.	Which among the following solution can be used as an electrolyte for the electrorefining of copper?
Answer» Which among the following solution can be used as an electrolyte for the electrorefining of copper?

Discussion

272.	Question 21Which of the following metals can displace the other two metals from their salt solutions?
Answer» Question 21 Which of the following metals can displace the other two metals from their salt solutions?

Discussion

273.	The reagent(s) used for softening the temporary hardness of water is (are):
Answer» The reagent(s) used for softening the temporary hardness of water is (are):

Discussion

274.	What is aliphatic compound
Answer» What is aliphatic compound

Discussion

275.	In Delhi, public transport uses
Answer» In Delhi, public transport uses

Discussion

276.	What is a salt solution
Answer» What is a salt solution

Discussion

277.	In order to balance the equation, Mg3N2+xH2O→3Mg(OH)2+2NH3, the value of x is
Answer» In order to balance the equation, $M g_{3} N_{2} + x H_{2} O \to 3 M g (O H)_{2} + 2 N H_{3}$ , the value of $x$ is

Discussion

278.	Use the following information to answer the next question.4.120 kg of fuel was burnt to produce 178000 kJ of energy.The calorific value (in KJ/kg) of the fuel is
Answer» Use the following information to answer the next question. 4.120 kg of fuel was burnt to produce 178000 kJ of energy. The calorific value (in KJ/kg) of the fuel is

278.

Use the following information to answer the next question.4.120 kg of fuel was burnt to produce 178000 kJ of energy.The calorific value (in KJ/kg) of the fuel is

Answer»

Use the following information to answer the next question.

4.120 kg of fuel was burnt to produce 178000 kJ of energy.

The calorific value (in KJ/kg) of the fuel is

Discussion

279.	Which of the following gas possesses maximum rms velocity?All being at same temperature(1)Oxygen (2)Carbon Dioxide(3)Hydrogen (4)Helium
Answer» Which of the following gas possesses maximum rms velocity?All being at same temperature (1)Oxygen (2)Carbon Dioxide (3)Hydrogen (4)Helium

Discussion

280.	The pollutants released from oil refineries causes:
Answer» The pollutants released from oil refineries causes:

Discussion

281.	A chemical compound having smell of chlorine is used to remove yellowness of white clothes in laundries. Name the compound and write the chemical equation involved in its preparation. [2 MARKS]
Answer» A chemical compound having smell of chlorine is used to remove yellowness of white clothes in laundries. Name the compound and write the chemical equation involved in its preparation. [2 MARKS]

Discussion

282.	1. Few children were inflating balloons. 2. The baker was baking a cake. Among the aforementioned observations, which are the examples of reversible change?
Answer» 1. Few children were inflating balloons. 2. The baker was baking a cake. Among the aforementioned observations, which are the examples of reversible change?

Discussion

283.	The definition of "resources including solar, wind, geothermal, hydro" best fits which science term?
Answer» The definition of "resources including solar, wind, geothermal, hydro" best fits which science term?

Discussion

284.	Question 6 (c) Give reasons for the following. Copper cannot displace zinc from its salt solution.
Answer» Question 6 (c) Give reasons for the following. Copper cannot displace zinc from its salt solution.

Discussion

285.	Question 5 (b)Tick True/False against the following statements :CNG is more polluting fuel than petrol.
Answer» Question 5 (b) Tick True/False against the following statements : CNG is more polluting fuel than petrol.

Discussion

286.	Why BiH3 has greater melting point than NH3 [H-bonding between H and N].Why BiH3 and SbH3 have greater Boiling point than Nh3 [N and H have H-bonding]
Answer» Why BiH3 has greater melting point than NH3 [H-bonding between H and N]. Why BiH3 and SbH3 have greater Boiling point than Nh3 [N and H have H-bonding]

Discussion

287.	A gas occupies 500 cubic centimeter at normal temperature. At what temperature will the volume of the gas be reduced by 20% of its original volume, pressure being Constant
Answer» A gas occupies 500 cubic centimeter at normal temperature. At what temperature will the volume of the gas be reduced by 20% of its original volume, pressure being Constant

Discussion

288.	Question 8(a) Name a gas that is released during the combustion of a fuel.(b) The solid form of carbon dioxide is known as _____.
Answer» Question 8 (a) Name a gas that is released during the combustion of a fuel. (b) The solid form of carbon dioxide is known as _____.

288.

Question 8(a) Name a gas that is released during the combustion of a fuel.(b) The solid form of carbon dioxide is known as _____.

Answer»

Question 8

(a) Name a gas that is released during the combustion of a fuel.

(b) The solid form of carbon dioxide is known as _____.

Discussion

289.	Classify bases on the basis of their strength.
Answer» Classify bases on the basis of their strength.

Discussion

290.	Explain formula of solid angle
Answer» Explain formula of solid angle

Discussion

291.	Is it necessary that all oxidation reactions are exothermic? If ues then why the reaction for formation of nitrogen oxide an endothermic reaction? N2+ O2 + heat ----> NO
Answer» Is it necessary that all oxidation reactions are exothermic? If ues then why the reaction for formation of nitrogen oxide an endothermic reaction? N²+ O²+ heat ----> NO

291.

Is it necessary that all oxidation reactions are exothermic? If ues then why the reaction for formation of nitrogen oxide an endothermic reaction? N2+ O2 + heat ----> NO

Answer»

Is it necessary that all oxidation reactions are exothermic? If ues then why the reaction for formation of nitrogen oxide an endothermic reaction?

N²+ O²+ heat ----> NO

Discussion

292.	Explain why rusting of iron objects is faster in coastal areas than in deserts.
Answer» Explain why rusting of iron objects is faster in coastal areas than in deserts.

Discussion

293.	Why metls like gold occur free in state
Answer» Why metls like gold occur free in state

Discussion

294.

Match the following. Group ‘A’ Group ‘B’ (1) Carbon dioxide (a) Generation of soil (2) Oxygen (b) Rain (3) Water vapour (c) Plants and food production (4) Microbes (d) Combustion

Answer» Match the following.

Group ‘A’		Group ‘B’
(1)	Carbon dioxide	(a)	Generation of soil
(2)	Oxygen	(b)	Rain
(3)	Water vapour	(c)	Plants and food production
(4)	Microbes	(d)	Combustion

Discussion

295.	Look at below figure where petroleum and natural gas deposits are shown. Why do we find oil layer above water layer.
Answer» Look at below figure where petroleum and natural gas deposits are shown. Why do we find oil layer above water layer.

Discussion

296.	1_What is the use of Gamma rays.2_difference between x-rays and gamma-rays
Answer» 1_What is the use of Gamma rays. 2_difference between x-rays and gamma-rays

Discussion

297.	Which of the following is/are the requirements for the formation of the metallic bond?(i) Formation of negative ions.(ii) Formation of positive ions.(iii) Freely moving electrons.(iv) Sharing of electrons between two atoms.
Answer» Which of the following is/are the requirements for the formation of the metallic bond? (i) Formation of negative ions. (ii) Formation of positive ions. (iii) Freely moving electrons. (iv) Sharing of electrons between two atoms.

Discussion

298.	6.Difference between sol, solution, suspension?
Answer» 6.Difference between sol, solution, suspension?

Discussion

299.	WHAT DOES IT MEAN BY SALT OF ANA CID?
Answer» WHAT DOES IT MEAN BY SALT OF ANA CID?

Discussion

300.	Why is density of ice less than water?
Answer» Why is density of ice less than water?

Discussion

Explore topic-wise InterviewSolutions in .

21. Types of hydrocarbon

Reaction of metals with water

Why in Cathode Ray Discharge experiment, Rays are generated only from Cathode?

How to know if final kinetic energy is zero or final potential energy is zero while solving energy conservation related problems?

Silvery grey iron fillings are added to yellow sulphur powder in a test tube. The contents of the test tube were strongly heated until they glow red. On cooling it forms a grey dull solid. Which statement is correct about the contents of the test tube in the experiment?

Which gas was filled in the cathode ray discharge tube experiment invented by J.J. Thomson?

(i) What is meant by 'diffusion'? Give one example of diffusion in gases.(ii) Why do gases diffuse very fast?​(iii) Name two gases of air which dissolve in water by diffusion. What is the importance of this process in nature?

Ice cubes in cola could be classified as

Synthetic dyes are obtained from:

Shopkeepers prefer to keep eatables in plastic containers because:

Explain faciliated division

What do you mean by element?

How water vapour is greenhouse gas and leds to global warming?

Why acrylics not spun from the melt ?

Choose the correct statement:

When a gas is filled in a closed vessel is heated through 1 Degree Celsius its pressure is increased by 0.4% age the initial temperature of the gas was?

The suspended particles released by combustion of coal in air may lead to a health disease. Select the correct option.

What are electrons ??

Why is iron sulphide a compound?

Which among the following solution can be used as an electrolyte for the electrorefining of copper?

Question 21Which of the following metals can displace the other two metals from their salt solutions?

The reagent(s) used for softening the temporary hardness of water is (are):

What is aliphatic compound

In Delhi, public transport uses

What is a salt solution

In order to balance the equation, Mg3N2+xH2O→3Mg(OH)2+2NH3, the value of x is

Use the following information to answer the next question.4.120 kg of fuel was burnt to produce 178000 kJ of energy.The calorific value (in KJ/kg) of the fuel is

Which of the following gas possesses maximum rms velocity?All being at same temperature(1)Oxygen (2)Carbon Dioxide(3)Hydrogen (4)Helium

The pollutants released from oil refineries causes:

A chemical compound having smell of chlorine is used to remove yellowness of white clothes in laundries. Name the compound and write the chemical equation involved in its preparation. [2 MARKS]

1. Few children were inflating balloons. 2. The baker was baking a cake. Among the aforementioned observations, which are the examples of reversible change?

The definition of "resources including solar, wind, geothermal, hydro" best fits which science term?

Question 6 (c) Give reasons for the following. Copper cannot displace zinc from its salt solution.

Question 5 (b)Tick True/False against the following statements :CNG is more polluting fuel than petrol.​​​​​​​

Why BiH3 has greater melting point than NH3 [H-bonding between H and N].Why BiH3 and SbH3 have greater Boiling point than Nh3 [N and H have H-bonding]

A gas occupies 500 cubic centimeter at normal temperature. At what temperature will the volume of the gas be reduced by 20% of its original volume, pressure being Constant

Question 8(a) Name a gas that is released during the combustion of a fuel.(b) The solid form of carbon dioxide is known as _____.

Classify bases on the basis of their strength.

Explain formula of solid angle

Is it necessary that all oxidation reactions are exothermic? If ues then why the reaction for formation of nitrogen oxide an endothermic reaction? N2+ O2 + heat ----&gt; NO

Explain why rusting of iron objects is faster in coastal areas than in deserts.​

Why metls like gold occur free in state

Match the following. Group ‘A’ Group ‘B’ (1) Carbon dioxide (a) Generation of soil (2) Oxygen (b) Rain (3) Water vapour (c) Plants and food production (4) Microbes (d) Combustion

Look at below figure where petroleum and natural gas deposits are shown. Why do we find oil layer above water layer.

1_What is the use of Gamma rays.2_difference between x-rays and gamma-rays

Which of the following is/are the requirements for the formation of the metallic bond?(i) Formation of negative ions.(ii) Formation of positive ions.(iii) Freely moving electrons.(iv) Sharing of electrons between two atoms.

6.Difference between sol, solution, suspension?

WHAT DOES IT MEAN BY SALT OF ANA CID?

Why is density of ice less than water?

(i) What is meant by 'diffusion'? Give one example of diffusion in gases.(ii) Why do gases diffuse very fast?(iii) Name two gases of air which dissolve in water by diffusion. What is the importance of this process in nature?

Question 5 (b)Tick True/False against the following statements :CNG is more polluting fuel than petrol.

Is it necessary that all oxidation reactions are exothermic? If ues then why the reaction for formation of nitrogen oxide an endothermic reaction? N2+ O2 + heat ----> NO

Explain why rusting of iron objects is faster in coastal areas than in deserts.