7248 + Interview Questions in Chemistry Page 80 InterviewSolution

3951.	Which of the following is the source of silk?
Answer» Which of the following is the source of silk?

Discussion

3952.	for a given mass of gas if pressure is reduced to half and temperature is increased two times then final volume would become
Answer» for a given mass of gas if pressure is reduced to half and temperature is increased two times then final volume would become

Discussion

3953.	Which of the following is not iso electronic series
Answer» Which of the following is not iso electronic series

Discussion

3954.	The power of a motor pump is 20 W. The work done by pump in 1 minute is x then x100 = ___12
Answer» The power of a motor pump is $20 W$ . The work done by pump in 1 minute is $x$ then $\frac{x}{100}$ = ___ 12

Discussion

3955.	What gets oxidized and what gets reduced in cross cannizaro reaction?
Answer» What gets oxidized and what gets reduced in cross cannizaro reaction?

Discussion

3956.	What are the parameters based on which a fuel is selected? [2 MARKS]
Answer» What are the parameters based on which a fuel is selected? [2 MARKS]

Discussion

3957.	The approximate amount of oil left in an oil well after primary recovery process is:
Answer» The approximate amount of oil left in an oil well after primary recovery process is:

Discussion

3958.	If molten MgCl2 is electolysed, suggest a suitable electrode ( anode)
Answer» If molten MgCl2 is electolysed, suggest a suitable electrode ( anode)

Discussion

3959.	List any two characteristics of drinking water. Why is the water obtained from oceans and seas unfit for drinking purposes?
Answer» List any two characteristics of drinking water. Why is the water obtained from oceans and seas unfit for drinking purposes?

Discussion

3960.	Which of the following is not one of the prime health risks associated with greater UV-radiation due to depletion of stratosphere ozone ?
Answer» Which of the following is not one of the prime health risks associated with greater UV-radiation due to depletion of stratosphere ozone ?

Discussion

3961.	Match Column-I with Column-II and select the correct answer using the codes given below the columns. Column−I Column−IIA. Coal gasP.(C2H6+C3H8+C4H10)B.Petroleum gasQ.(CH4+C2H6+C3H8+C4H10)C.Producer gasR.(H2+CH4+CO)D.Natural gasS.(CO+N2) [C2H6−ethane, C3H8−propane, C4H10−butane]
Answer» Match Column-I with Column-II and select the correct answer using the codes given below the columns. $\begin{matrix} C o l u m n - I & C o l u m n - I I A . & C o a l g a s & P . & (C_{2} H_{6} + C_{3} H_{8} + C_{4} H_{10}) B . & P e t r o l e u m g a s & Q . & (C H_{4} + C_{2} H_{6} + C_{3} H_{8} + C_{4} H_{10}) C . & P r o d u c e r g a s & R . & (H_{2} + C H_{4} + C O) D . & N a t u r a l g a s & S . & (C O + N_{2}) \end{matrix}$ $[C_{2} H_{6} - e t h a n e, C_{3} H_{8} - p r o p a n e, C_{4} H_{10} - b u t a n e]$

Discussion

3962.	41.mole fraction of diamond is
Answer» 41.mole fraction of diamond is

Discussion

3963.	Explain the following.a. Diamond, graphite and fullerenes are crystalline forms of carbon.b. Methane is called marsh gas.c. Petrol, diesel, coal are fossil fuels.d. Uses of various allotropes of carbon.e. Use of CO2 in fire extinguisher.f. Practical uses of CO2
Answer» Explain the following. a. Diamond, graphite and fullerenes are crystalline forms of carbon. b. Methane is called marsh gas. c. Petrol, diesel, coal are fossil fuels. d. Uses of various allotropes of carbon. e. Use of CO₂in fire extinguisher. f. Practical uses of CO₂

Discussion

3964.	Non-metals are generally non-conductors of electricity. The non-metal whose one of the forms can be used to make electrodes in electrolysis experiments is : (a) iodine (b) carbon (c) silicon (d) phosphorus
Answer» Non-metals are generally non-conductors of electricity. The non-metal whose one of the forms can be used to make electrodes in electrolysis experiments is : (a) iodine (b) carbon (c) silicon (d) phosphorus

Discussion

3965.	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

3966.	Which of the following favours the formation of coal?
Answer» Which of the following favours the formation of coal?

Discussion

3967.	conc of I decreases from 0.25 mol/L to 0.20 mol/L in 5 min. calculate rate of reaction and rate of appearance of cl ions
Answer» conc of I decreases from 0.25 mol/L to 0.20 mol/L in 5 min. calculate rate of reaction and rate of appearance of cl ions

Discussion

3968.	Name the product of coal which is thick black liquid having an unpleasant smell.
Answer» Name the product of coal which is thick black liquid having an unpleasant smell.

Discussion

3969.	Calculate vapour pressure of 0.1M urea soln. Vapour pressure of water at the given temperature is 20 torr. Assume molality and molality to be equal.
Answer» Calculate vapour pressure of 0.1M urea soln. Vapour pressure of water at the given temperature is 20 torr. Assume molality and molality to be equal.

Discussion

3970.	Why is water very precious for all living beings ?
Answer» Why is water very precious for all living beings ?

Discussion

3971.	Describe an activity to show that thermoplastic is a poor conductor of electricity.
Answer» Describe an activity to show that thermoplastic is a poor conductor of electricity.

Discussion

3972.	On destructive distillation, 1000 kg of coal gives P kg of coke, Q litres of ammonia, R litres of coal tar and S m3 of coal gas. The value of P, Q, R and S respectively are
Answer» On destructive distillation, $1000$ kg of coal gives $P$ kg of coke, $Q$ litres of ammonia, $R$ litres of coal tar and $S$ $m^{3}$ of coal gas. The value of $P, Q, R$ and $S$ respectively are

Discussion

3973.	Making of sugar solution is which change
Answer» Making of sugar solution is which change

Discussion

3974.	Water is heated from 0∘C to 10∘C, then its volume
Answer» Water is heated from $0^{\circ} C t o 10^{\circ} C$ , then its volume

Discussion

3975.	Rayon is
Answer» Rayon is

Discussion

3976.	what is quartz substance?
Answer» what is quartz substance?

Discussion

3977.	Which of the following arrangement represents the fire triangle?
Answer» Which of the following arrangement represents the fire triangle?

Discussion

3978.	A polymer is a large molecule composed of many repeated units. What is a polyester composed of?
Answer» A polymer is a large molecule composed of many repeated units. What is a polyester composed of?

Discussion

3979.	Which of the following is also known as the 'black gold'?
Answer» Which of the following is also known as the 'black gold'?

Discussion

3980.	Select the polyatomic ions.
Answer» Select the polyatomic ions.

Discussion

3981.	Copper nitrate is heated to form copper oxide, gas X and gas Y. Gas X is colourless and neutral to litmus. Gas Y is brown in colour having an irritating odour and non-combustible. Gas Y turns green acidified ferrous solution brown. Gas Y is:
Answer» Copper nitrate is heated to form copper oxide, gas X and gas Y. Gas X is colourless and neutral to litmus. Gas Y is brown in colour having an irritating odour and non-combustible. Gas Y turns green acidified ferrous solution brown. Gas Y is:

Discussion

3982.	If for H2 gas, Cp – Cv = a and for O2 gas, Cp – Cv = b, where Cp and Cv are heat capacity in cal/g-K, then select the correct relation
Answer» If for H2 gas, Cp – Cv = a and for O2 gas, Cp – Cv = b, where Cp and Cv are heat capacity in cal/g-K, then select the correct relation

Discussion

3983.	Which of the following reacts with cold water vigorously?
Answer» Which of the following reacts with cold water vigorously?

Discussion

3984.	Which of the following statements is/are correct?
Answer» Which of the following statements is/are correct?

Discussion

3985.	Hydrogen is not evolved when a metal reacts with concentrated nitric acid .why?
Answer» Hydrogen is not evolved when a metal reacts with concentrated nitric acid .why?

Discussion

3986.	Differentiate between plastic and polythene. [3 MARKS]
Answer» Differentiate between plastic and polythene. [3 MARKS]

Discussion

3987.	Identify the non-metal which exists in liquid state in room temperture 25∘C.
Answer» Identify the non-metal which exists in liquid state in room temperture $25^{\circ} C$ .

Discussion

3988.	Give scientific reasons.(a) We must use cotton clothes in summer.(b) We must observe economy in the use of materials.(c) Saving paper is the need of the hour.(d) Man-made materials have more demand.(e) Humus is a natural material.
Answer» Give scientific reasons. (a) We must use cotton clothes in summer. (b) We must observe economy in the use of materials. (c) Saving paper is the need of the hour. (d) Man-made materials have more demand. (e) Humus is a natural material.

Discussion

3989.	Define (a) malleability, and (b) ductility.
Answer» Define (a) malleability, and (b) ductility.

Discussion

3990.	The absorption of hydrogen by metals like palladium and platinum is called ___.
Answer» The absorption of hydrogen by metals like palladium and platinum is called ___.

Discussion

3991.	What is neutralisation reaction?
Answer» What is neutralisation reaction?

Discussion

3992.	A has fcc arrangement, B Is present in 2/3rd of tetrahedral voids.The formula of compund will be
Answer» A has fcc arrangement, B Is present in 2/3rd of tetrahedral voids.The formula of compund will be

Discussion

3993.	The nature of cr2+ and mn3+ respectively are reducing and oxidizing. How to decide this which is reducing and which is oxidizing?
Answer» The nature of cr2+ and mn3+ respectively are reducing and oxidizing. How to decide this which is reducing and which is oxidizing?

Discussion

3994.	Identify "X" in the below image which burns with a pop-up sound?
Answer» Identify "X" in the below image which burns with a pop-up sound?

3994.

Identify "X" in the below image which burns with a pop-up sound?

Answer»

Identify "X" in the below image which burns with a pop-up sound?

Discussion

3995.	Structure of a mixed oxide is cubic close packed .The cubic unit cell of mixed oxide ions. One fourth of the tetrahedral voids are occupied by monovalent metal A and octahedral B voids are occupied by a monovalent metal B .The formula of oxide is
Answer» Structure of a mixed oxide is cubic close packed .The cubic unit cell of mixed oxide ions. One fourth of the tetrahedral voids are occupied by monovalent metal A and octahedral B voids are occupied by a monovalent metal B .The formula of oxide is

Discussion

3996.	According to law of conservation of mass, during a chemical reaction:
Answer» According to law of conservation of mass, during a chemical reaction:

Discussion

3997.	1 l of co2 is passed through red hot coke . The volume becomes 1.4 litres at same temperature and pressure .the composition of products is
Answer» 1 l of co2 is passed through red hot coke . The volume becomes 1.4 litres at same temperature and pressure .the composition of products is

Discussion

3998.	The ultimate source of all water on the earth is (a) oceans and seas (b) spring and wells (c) rivers and lakes (d) rain
Answer» The ultimate source of all water on the earth is (a) oceans and seas (b) spring and wells (c) rivers and lakes (d) rain

3998.

The ultimate source of all water on the earth is (a) oceans and seas (b) spring and wells (c) rivers and lakes (d) rain

Answer»

The ultimate source of all water on the earth is

(a) oceans and seas

(b) spring and wells

(c) rivers and lakes

(d) rain

Discussion

3999.	What is polar bond and how the bond will form ?
Answer» What is polar bond and how the bond will form ?

Discussion

4000.	1. Lemon sherbat has sweet sour and salty taste and it can be poured in glass. Give scientific reason 2. Constituent substanc of colloid cannot be separated by ordinary filtration
Answer» 1. Lemon sherbat has sweet sour and salty taste and it can be poured in glass. Give scientific reason 2. Constituent substanc of colloid cannot be separated by ordinary filtration

4000.

1. Lemon sherbat has sweet sour and salty taste and it can be poured in glass. Give scientific reason 2. Constituent substanc of colloid cannot be separated by ordinary filtration

Answer»

1. Lemon sherbat has sweet sour and salty taste and it can be poured in glass. Give scientific reason

2. Constituent substanc of colloid cannot be separated by ordinary filtration

Discussion

Explore topic-wise InterviewSolutions in .

Which of the following is the source of silk?

for a given mass of gas if pressure is reduced to half and temperature is increased two times then final volume would become

Which of the following is not iso electronic series

The power of a motor pump is 20 W. The work done by pump in 1 minute is x then x100 = ___12

What gets oxidized and what gets reduced in cross cannizaro reaction?

What are the parameters based on which a fuel is selected? [2 MARKS]

The approximate amount of oil left in an oil well after primary recovery process is:

If molten MgCl2 is electolysed, suggest a suitable electrode ( anode)

List any two characteristics of drinking water. Why is the water obtained from oceans and seas unfit for drinking purposes?

Which of the following is not one of the prime health risks associated with greater UV-radiation due to depletion of stratosphere ozone ?

Match Column-I with Column-II and select the correct answer using the codes given below the columns. Column−I Column−IIA. Coal gasP.(C2H6+C3H8+C4H10)B.Petroleum gasQ.(CH4+C2H6+C3H8+C4H10)C.Producer gasR.(H2+CH4+CO)D.Natural gasS.(CO+N2) [C2H6−ethane, C3H8−propane, C4H10−butane]

41.mole fraction of diamond is

Explain the following.a. Diamond, graphite and fullerenes are crystalline forms of carbon.b. Methane is called marsh gas.c. Petrol, diesel, coal are fossil fuels.d. Uses of various allotropes of carbon.e. Use of CO2 in fire extinguisher.f. Practical uses of CO2

Non-metals are generally non-conductors of electricity. The non-metal whose one of the forms can be used to make electrodes in electrolysis experiments is : (a) iodine (b) carbon (c) silicon (d) phosphorus

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?

Which of the following favours the formation of coal?

conc of I decreases from 0.25 mol/L to 0.20 mol/L in 5 min. calculate rate of reaction and rate of appearance of cl ions

Name the product of coal which is thick black liquid having an unpleasant smell.

Calculate vapour pressure of 0.1M urea soln. Vapour pressure of water at the given temperature is 20 torr. Assume molality and molality to be equal.

Why is water very precious for all living beings ?

Describe an activity to show that thermoplastic is a poor conductor of electricity.

On destructive distillation, 1000 kg of coal gives P kg of coke, Q litres of ammonia, R litres of coal tar and S m3 of coal gas. The value of P, Q, R and S respectively are

Making of sugar solution is which change

Water is heated from 0∘C to 10∘C, then its volume

Rayon is

what is quartz substance?

Which of the following arrangement represents the fire triangle?

A polymer is a large molecule composed of many repeated units. What is a polyester composed of?

Which of the following is also known as the 'black gold'?

Select the polyatomic ions.

Copper nitrate is heated to form copper oxide, gas X and gas Y. Gas X is colourless and neutral to litmus. Gas Y is brown in colour having an irritating odour and non-combustible. Gas Y turns green acidified ferrous solution brown. Gas Y is:

If for H2 gas, Cp – Cv = a and for O2 gas, Cp – Cv = b, where Cp and Cv are heat capacity in cal/g-K, then select the correct relation

Which of the following reacts with cold water vigorously?

Which of the following statements is/are correct?

Hydrogen is not evolved when a metal reacts with concentrated nitric acid .why?

Differentiate between plastic and polythene. [3 MARKS]

Identify the non-metal which exists in liquid state in room temperture 25∘C.

Give scientific reasons.(a) We must use cotton clothes in summer.(b) We must observe economy in the use of materials.(c) Saving paper is the need of the hour.(d) Man-made materials have more demand.(e) Humus is a natural material.

Define (a) malleability, and (b) ductility.

The absorption of hydrogen by metals like palladium and platinum is called ___.

What is neutralisation reaction?

A has fcc arrangement, B Is present in 2/3rd of tetrahedral voids.The formula of compund will be

The nature of cr2+ and mn3+ respectively are reducing and oxidizing. How to decide this which is reducing and which is oxidizing?

Identify "X" in the below image which burns with a pop-up sound?

Structure of a mixed oxide is cubic close packed .The cubic unit cell of mixed oxide ions. One fourth of the tetrahedral voids are occupied by monovalent metal A and octahedral B voids are occupied by a monovalent metal B .The formula of oxide is

According to law of conservation of mass, during a chemical reaction:

1 l of co2 is passed through red hot coke . The volume becomes 1.4 litres at same temperature and pressure .the composition of products is

The ultimate source of all water on the earth is (a) oceans and seas (b) spring and wells (c) rivers and lakes (d) rain

What is polar bond and how the bond will form ?

1. Lemon sherbat has sweet sour and salty taste and it can be poured in glass. Give scientific reason 2. Constituent substanc of colloid cannot be separated by ordinary filtration