7248 + Interview Questions in Chemistry Page 61 InterviewSolution

3001.	Energy required to move a body of mass m fromthe orbit of 2r to 4r
Answer» Energy required to move a body of mass m fromthe orbit of 2r to 4r

Discussion

3002.	Dry hydrogen chloride gas does not turn blue litmus red whereas dilute hydrochloric acid does.
Answer» Dry hydrogen chloride gas does not turn blue litmus red whereas dilute hydrochloric acid does.

Discussion

3003.	Why the gravitational force is weakest force in the nature although it attract all the objects which is in under it ?
Answer» Why the gravitational force is weakest force in the nature although it attract all the objects which is in under it ?

Discussion

3004.	Assertion (A): Permanent hardness of water is removed by treatment with washing soda. Reason(R): Washing soda reacts with soluble magnesium and calcium sulphate to form water-soluble compounds.
Answer» Assertion (A): Permanent hardness of water is removed by treatment with washing soda. Reason(R): Washing soda reacts with soluble magnesium and calcium sulphate to form water-soluble compounds.

Discussion

3005.	How does the electronic configuration of an atom relate to its position in the Modern Periodic Table?
Answer» How does the electronic configuration of an atom relate to its position in the Modern Periodic Table?

Discussion

3006.	Electrons were discovered by:
Answer» Electrons were discovered by:

Discussion

3007.	A is a long chain made up of many repeated small units called monomers.
Answer» A is a long chain made up of many repeated small units called monomers.

Discussion

3008.	When does a fire produce smoke?
Answer» When does a fire produce smoke?

Discussion

3009.	Which of the following is correct about microbes?
Answer» Which of the following is correct about microbes?

Discussion

3010.	What is the mass of an electron in kgs?
Answer» What is the mass of an electron in kgs?

Discussion

3011.	In India, which association advises people on saving petrol or diesel while driving?
Answer» In India, which association advises people on saving petrol or diesel while driving?

Discussion

3012.	168 the decay of proton to neutron is possible only inside the nucleus,since proton has smaller mass than neutron.explain.
Answer» 168 the decay of proton to neutron is possible only inside the nucleus,since proton has smaller mass than neutron.explain.

Discussion

3013.	Name any two metals that can be obtained by the process of electro refining of metal
Answer» Name any two metals that can be obtained by the process of electro refining of metal

Discussion

3014.	Why is the reactionSnCl2 + HgCl2 - - - > SnCl4 +Hg2Cl2 not feasible?
Answer» Why is the reaction SnCl2 + HgCl2 - - - > SnCl4 +Hg2Cl2 not feasible?

Discussion

3015.	In photosynthesis, plants absorb sunlight from sun. This is a light energy and sunlight is a catalyst which is written above arrow. Similarly, why heat is not a catalyst in chemical reactions even if a delta sign is mentioned above arrow?
Answer» In photosynthesis, plants absorb sunlight from sun. This is a light energy and sunlight is a catalyst which is written above arrow. Similarly, why heat is not a catalyst in chemical reactions even if a delta sign is mentioned above arrow?

Discussion

3016.	But water is universal solvent then in reaction CuSO4 + 5H2O ----- CuSO4.5H2O Why this is not applicable
Answer» But water is universal solvent then in reaction CuSO4 + 5H2O ----- CuSO4.5H2O Why this is not applicable

Discussion

3017.	what is reynolds number and equation of contiunity?
Answer» what is reynolds number and equation of contiunity?

Discussion

3018.	Complete equipment of electrolysis is known as___________.
Answer» Complete equipment of electrolysis is known as___________.

Discussion

3019.	At 60^° C if the water has \lbrack H+\rbrack=10^{-5}mol/litre,then thhe solution will be acidic neutral or amphoteric
Answer» At 60^° C if the water has \lbrack H+\rbrack=10^{-5}mol/litre,then thhe solution will be acidic neutral or amphoteric

Discussion

3020.	On heating a sublimate solid ,the molecules break free and escape from surface of the solid directly into vapour
Answer» On heating a sublimate solid ,the molecules break free and escape from surface of the solid directly into vapour

Discussion

3021.	Find the maximum compression in the spring, if the lower block is shifted rightwards with acceleration 'a'. All the surfaces are smooth
Answer» Find the maximum compression in the spring, if the lower block is shifted rightwards with acceleration 'a'. All the surfaces are smooth

3021.

Find the maximum compression in the spring, if the lower block is shifted rightwards with acceleration 'a'. All the surfaces are smooth

Answer»

Find the maximum compression in the spring, if the lower block is shifted rightwards with acceleration 'a'. All the surfaces are smooth

Discussion

3022.	A copper coin was kept in silver nitrate solution for a few days. what will happen to the copper coin and what will happen to the colour of the solution write the balanced equation
Answer» A copper coin was kept in silver nitrate solution for a few days. what will happen to the copper coin and what will happen to the colour of the solution write the balanced equation

Discussion

3023.	Define empirical and molecular formulas with a suitable example.
Answer» Define empirical and molecular formulas with a suitable example.

Discussion

3024.	Which plastic is used in making parts of refrigerators, gears of machines and toys?
Answer» Which plastic is used in making parts of refrigerators, gears of machines and toys?

Discussion

3025.	What are thermoplastics and thermosetting plastics? Mention one application/example of each of them. [5 MARKS]
Answer» What are thermoplastics and thermosetting plastics? Mention one application/example of each of them. [5 MARKS]

Discussion

3026.	Nylon is not used in making:
Answer» Nylon is not used in making:

Discussion

3027.	Study the characteristics of substance X given below: a) High melting pointb) Solid statec) Good conductor of electricityBased on the above characteristics, what could X be?
Answer» Study the characteristics of substance X given below: a) High melting point b) Solid state c) Good conductor of electricity Based on the above characteristics, what could X be?

Discussion

3028.	how many times an atom of sulphur is hevier than an atom of carbon
Answer» how many times an atom of sulphur is hevier than an atom of carbon

Discussion

3029.	The emission of light by a solid that has been heated is called:
Answer» The emission of light by a solid that has been heated is called:

Discussion

3030.	Match the following: (i)Water(A)Compound(ii)Hydrogen(B)Element(iii)Salt(iv)Gold (v)Carbon dioxide(vi)Iron The correct pairs are:-
Answer» Match the following: $\begin{matrix} (i) & Water & (A) & Compound (i i) & Hydrogen & (B) & Element (i i i) & Salt (i v) & Gold (v) & Carbon dioxide (v i) & Iron \end{matrix}$ The correct pairs are:-

3030.

Match the following: (i)Water(A)Compound(ii)Hydrogen(B)Element(iii)Salt(iv)Gold (v)Carbon dioxide(vi)Iron The correct pairs are:-

Answer»

Match the following:

$\begin{matrix} (i) & Water & (A) & Compound (i i) & Hydrogen & (B) & Element (i i i) & Salt (i v) & Gold (v) & Carbon dioxide (v i) & Iron \end{matrix}$
The correct pairs are:-

Discussion

3031.	what is thermite reaction?why magnesium strip is used and not fire?
Answer» what is thermite reaction?why magnesium strip is used and not fire?

Discussion

3032.	Explain nitrogen cycle and carbon ccle
Answer» Explain nitrogen cycle and carbon ccle

Discussion

3033.	Is every double displacement reaction is precipitation reaction
Answer» Is every double displacement reaction is precipitation reaction

Discussion

3034.	(a^2* b^3* c)^4 * (abc)^3 / (a^3 bc^-1) = (a^m b^n *c^p)^1/2find m+n+p
Answer» (a^2* b^3* c)^4 * (abc)^3 / (a^3 bc^-1) = (a^m b^n *c^p)^1/2 find m+n+p

Discussion

3035.	The man-made fibre made from the cellulose polymer is : (a) nylon (b) acrylic (c) rayon (d) polyester
Answer» The man-made fibre made from the cellulose polymer is : (a) nylon (b) acrylic (c) rayon (d) polyester

3035.

The man-made fibre made from the cellulose polymer is : (a) nylon (b) acrylic (c) rayon (d) polyester

Answer»

The man-made fibre made from the cellulose polymer is :

(a) nylon (b) acrylic (c) rayon (d) polyester

Discussion

3036.	every metals are solid in nature but mercury is liquid although it is considered as metal . why?
Answer» every metals are solid in nature but mercury is liquid although it is considered as metal . why?

Discussion

3037.	Balance the redox reaction P_{4 }+ OH^-\overset{}{→ PH_3}+ H_2PO_2
Answer» Balance the redox reaction P_{4 }+ OH^-\overset{}{→ PH_3}+ H_2PO_2

Discussion

3038.	Give two examples each of solid fuels, liquid fuels and gaseous fuels.
Answer» Give two examples each of solid fuels, liquid fuels and gaseous fuels.

Discussion

3039.	Why is the percentage of oxygen dissolved in water more than the percentage of oxygen dissolved in ordinary air?
Answer» Why is the percentage of oxygen dissolved in water more than the percentage of oxygen dissolved in ordinary air?

Discussion

3040.	Write the uses of the following substances -(a) Teflon (b) Dye
Answer» Write the uses of the following substances - (a) Teflon (b) Dye

3040.

Write the uses of the following substances -(a) Teflon (b) Dye

Answer»

Write the uses of the following substances -

(a) Teflon (b) Dye

Discussion

3041.	When an iron rod is heated at an end A, we feel heat at the end B. Which property of the iron rod does it indicate?
Answer» When an iron rod is heated at an end A, we feel heat at the end B. Which property of the iron rod does it indicate?

3041.

When an iron rod is heated at an end A, we feel heat at the end B. Which property of the iron rod does it indicate?

Answer»

When an iron rod is heated at an end A, we feel heat at the end B. Which property of the iron rod does it indicate?

Discussion

3042.	Carbon combines with hydrogen to form three compounds A,B and C are 25, 14.3, and 7.7 respectively. Which law of chemical combination is illustrated ? Hint: Find % of carbon in each compound and then illustrate law of multiple proportion
Answer» Carbon combines with hydrogen to form three compounds A,B and C are 25, 14.3, and 7.7 respectively. Which law of chemical combination is illustrated ? Hint: Find % of carbon in each compound and then illustrate law of multiple proportion

Discussion

3043.	Calculate mass/volume percentage of 20% solution by mass of sulphuric acid
Answer» Calculate mass/volume percentage of 20% solution by mass of sulphuric acid

Discussion

3044.	Emissions from what are a major cause of environmental pollution?
Answer» Emissions from what are a major cause of environmental pollution?

Discussion

3045.	Which of the following is the main cause of global warming ? (a) nitrogen dioxide (b) sulphur dioxide (c) carbon dioxide (d) ozone
Answer» Which of the following is the main cause of global warming ? (a) nitrogen dioxide (b) sulphur dioxide (c) carbon dioxide (d) ozone

3045.

Which of the following is the main cause of global warming ? (a) nitrogen dioxide (b) sulphur dioxide (c) carbon dioxide (d) ozone

Answer»

Which of the following is the main cause of global warming ?

(a) nitrogen dioxide

(b) sulphur dioxide

(c) carbon dioxide

(d) ozone

Discussion

3046.	Why do you think nylon is used in making fishing nets?
Answer» Why do you think nylon is used in making fishing nets?

Discussion

3047.	Two glass jars A and B are filled with carbon dioxide and oxygen gases, respectively. In each jar, a lighted candle is placed simultaneously. In which jar will the candle remain lighted for a longer time and why?
Answer» Two glass jars A and B are filled with carbon dioxide and oxygen gases, respectively. In each jar, a lighted candle is placed simultaneously. In which jar will the candle remain lighted for a longer time and why?

Discussion

3048.	Some of the water quality parameters are measured by titrating a water sample with a titrant. Group-I gives a list of parameters and Group-II gives the list of titrant.Groups - IGroups - IIP. Alkalinity1.N/35.5 AgNO3Q. Hardness2.N/40Na2S2O3R. Chloride3.H2SO4S. Dissolved oxygen4.N/50EDTACodes:
Answer» Some of the water quality parameters are measured by titrating a water sample with a titrant. Group-I gives a list of parameters and Group-II gives the list of titrant. $\begin{matrix} Groups - I & Groups - II P. Alkalinity & 1. N / 35.5 A g N O_{3} Q. Hardness & 2. N / 40 N a_{2} S_{2} O_{3} R. Chloride & 3. H_{2} S O_{4} S. Dissolved oxygen & 4. N / 50 E D T A \end{matrix}$ Codes:

Discussion

3049.	Why dont we use hydrogen as a common fuel in our automoboiles?
Answer» Why dont we use hydrogen as a common fuel in our automoboiles?

Discussion

3050.	When dilute hydro-chloric acid is added to granulated zinc placed in a test tube, the observation made is(1) the surface of the metal turns shining(2) the reaction mixture turns milky(3) odour of chlorine is observed(4) a colourless and odorless gas evolves with bubbles
Answer» When dilute hydro-chloric acid is added to granulated zinc placed in a test tube, the observation made is (1) the surface of the metal turns shining (2) the reaction mixture turns milky (3) odour of chlorine is observed (4) a colourless and odorless gas evolves with bubbles

Discussion

Explore topic-wise InterviewSolutions in .

Energy required to move a body of mass m fromthe orbit of 2r to 4r

Dry hydrogen chloride gas does not turn blue litmus red whereas dilute hydrochloric acid does.

Why the gravitational force is weakest force in the nature although it attract all the objects which is in under it ?

Assertion (A): Permanent hardness of water is removed by treatment with washing soda. Reason(R): Washing soda reacts with soluble magnesium and calcium sulphate to form water-soluble compounds.

How does the electronic configuration of an atom relate to its position in the Modern Periodic Table?

Electrons were discovered by:

A is a long chain made up of many repeated small units called monomers.

When does a fire produce smoke?

Which of the following is correct about microbes?

What is the mass of an electron in kgs?

In India, which association advises people on saving petrol or diesel while driving?

168 the decay of proton to neutron is possible only inside the nucleus,since proton has smaller mass than neutron.explain.

Name any two metals that can be obtained by the process of electro refining of metal

Why is the reactionSnCl2 + HgCl2 - - - > SnCl4 +Hg2Cl2 not feasible?

In photosynthesis, plants absorb sunlight from sun. This is a light energy and sunlight is a catalyst which is written above arrow. Similarly, why heat is not a catalyst in chemical reactions even if a delta sign is mentioned above arrow?

But water is universal solvent then in reaction CuSO4 + 5H2O ----- CuSO4.5H2O Why this is not applicable

what is reynolds number and equation of contiunity?

Complete equipment of electrolysis is known as___________.

At 60^° C if the water has \lbrack H+\rbrack=10^{-5}mol/litre,then thhe solution will be acidic neutral or amphoteric

On heating a sublimate solid ,the molecules break free and escape from surface of the solid directly into vapour

Find the maximum compression in the spring, if the lower block is shifted rightwards with acceleration 'a'. All the surfaces are smooth

A copper coin was kept in silver nitrate solution for a few days. what will happen to the copper coin and what will happen to the colour of the solution write the balanced equation

Define empirical and molecular formulas with a suitable example.

Which plastic is used in making parts of refrigerators, gears of machines and toys?

What are thermoplastics and thermosetting plastics? Mention one application/example of each of them. [5 MARKS]

Nylon is not used in making:

Study the characteristics of substance X given below: a) High melting pointb) Solid statec) Good conductor of electricityBased on the above characteristics, what could X be?

how many times an atom of sulphur is hevier than an atom of carbon

The emission of light by a solid that has been heated is called:

Match the following: (i)Water(A)Compound(ii)Hydrogen(B)Element(iii)Salt(iv)Gold (v)Carbon dioxide(vi)Iron The correct pairs are:-

what is thermite reaction?why magnesium strip is used and not fire?

Explain nitrogen cycle and carbon ccle

Is every double displacement reaction is precipitation reaction

(a^2* b^3* c)^4 * (abc)^3 / (a^3 *bc^-1) = (a^m *b^n *c^p)^1/2find m+n+p

The man-made fibre made from the cellulose polymer is : (a) nylon (b) acrylic (c) rayon (d) polyester

every metals are solid in nature but mercury is liquid although it is considered as metal . why?

Balance the redox reaction P_{4 }+ OH^-\overset{}{→ PH_3}+ H_2PO_2

Give two examples each of solid fuels, liquid fuels and gaseous fuels.

Why is the percentage of oxygen dissolved in water more than the percentage of oxygen dissolved in ordinary air?

Write the uses of the following substances -(a) Teflon (b) Dye

When an iron rod is heated at an end A, we feel heat at the end B. Which property of the iron rod does it indicate?

Carbon combines with hydrogen to form three compounds A,B and C are 25, 14.3, and 7.7 respectively. Which law of chemical combination is illustrated ? Hint: Find % of carbon in each compound and then illustrate law of multiple proportion

Calculate mass/volume percentage of 20% solution by mass of sulphuric acid

Emissions from what are a major cause of environmental pollution?

Which of the following is the main cause of global warming ? (a) nitrogen dioxide (b) sulphur dioxide (c) carbon dioxide (d) ozone

Why do you think nylon is used in making fishing nets?

Two glass jars A and B are filled with carbon dioxide and oxygen gases, respectively. In each jar, a lighted candle is placed simultaneously. In which jar will the candle remain lighted for a longer time and why?​

Some of the water quality parameters are measured by titrating a water sample with a titrant. Group-I gives a list of parameters and Group-II gives the list of titrant.Groups - IGroups - IIP. Alkalinity1.N/35.5 AgNO3Q. Hardness2.N/40Na2S2O3R. Chloride3.H2SO4S. Dissolved oxygen4.N/50EDTACodes:

Why dont we use hydrogen as a common fuel in our automoboiles?

When dilute hydro-chloric acid is added to granulated zinc placed in a test tube, the observation made is(1) the surface of the metal turns shining(2) the reaction mixture turns milky(3) odour of chlorine is observed(4) a colourless and odorless gas evolves with bubbles

(a^2* b^3* c)^4 * (abc)^3 / (a^3 bc^-1) = (a^m b^n *c^p)^1/2find m+n+p

Two glass jars A and B are filled with carbon dioxide and oxygen gases, respectively. In each jar, a lighted candle is placed simultaneously. In which jar will the candle remain lighted for a longer time and why?