10223 + Interview Questions in Chemistry Page 200 InterviewSolution

9951.	Ice floats on water because : A. Ice is lighter (by mass) than water B. Ice has a lower density than water
Answer» Ice floats on water because : A. Ice is lighter (by mass) than water B. Ice has a lower density than water

9951.

Ice floats on water because : A. Ice is lighter (by mass) than water B. Ice has a lower density than water

Answer»

Ice floats on water because :

A. Ice is lighter (by mass) than water

B. Ice has a lower density than water

9952.	Question 3 (b) Name two elements that have two electrons in their outermost shell
Answer» Question 3 (b) Name two elements that have two electrons in their outermost shell

Discussion

9953.	Which of the following is the reddish-brown gas released during the decomposition of nitric acid?
Answer» Which of the following is the reddish-brown gas released during the decomposition of nitric acid?

Discussion

9954.	In a reaction, In a reaction, 5.3 g of sodium carbonate reacted with 6 g of ethanoic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium ethanoate. Which law is applicable in this case?
Answer» In a reaction, In a reaction, 5.3 g of sodium carbonate reacted with 6 g of ethanoic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium ethanoate. Which law is applicable in this case?

Discussion

9955.	How many moles of K2Cr2O7 can be reduced by 1 mole of Sn+2
Answer» How many moles of $K_{2} C r_{2} O_{7}$ can be reduced by 1 mole of $S n^{+ 2}$

Discussion

9956.	How to convert 2040 J/kg/Centigrate into J/Kg/kelvin
Answer» How to convert 2040 J/kg/Centigrate into J/Kg/kelvin

Discussion

9957.	The water boils when : 1.Saturated vapour pressure of water becomes equal to atmospheric pressure 2. Boiling point of water becomes more than atmospheric pressure 3. Saturated vapour pressure of water is less than atmospheric pressure 4. Vapour pressure of water becomes more than atmospheric pressure
Answer» The water boils when : 1.Saturated vapour pressure of water becomes equal to atmospheric pressure 2. Boiling point of water becomes more than atmospheric pressure 3. Saturated vapour pressure of water is less than atmospheric pressure 4. Vapour pressure of water becomes more than atmospheric pressure

9957.

The water boils when : 1.Saturated vapour pressure of water becomes equal to atmospheric pressure 2. Boiling point of water becomes more than atmospheric pressure 3. Saturated vapour pressure of water is less than atmospheric pressure 4. Vapour pressure of water becomes more than atmospheric pressure

Answer»

The water boils when :

1.Saturated vapour pressure of water becomes equal to atmospheric pressure

2. Boiling point of water becomes more than atmospheric pressure

3. Saturated vapour pressure of water is less than atmospheric pressure

4. Vapour pressure of water becomes more than atmospheric pressure

Discussion

9958.	Covalent polymeric hydride among the following is
Answer» Covalent polymeric hydride among the following is

Discussion

9959.	Do the formula for ionisation energy i.e IE =13.6 ×z2/n2 is also applicable for non -unielectron species too?
Answer» Do the formula for ionisation energy i.e IE =13.6 ×z²/n²is also applicable for non -unielectron species too?

9959.

Do the formula for ionisation energy i.e IE =13.6 ×z2/n2 is also applicable for non -unielectron species too?

Answer»

Do the formula for ionisation energy i.e IE =13.6 ×z²/n²is also applicable for non -unielectron species too?

Discussion

9960.	Write a short note on Neutrons. Who discovered these particles? [3 MARKS]
Answer» Write a short note on Neutrons. Who discovered these particles? [3 MARKS]

Discussion

9961.	Question 3 (d) Pragya tested the solubility of three different substances at different temperatures and collected the data as given below (results are given in the following table, as grams of substance dissolved in 100 grams of water to form a saturated solution). d. What is the effect of change of temperature on the solubility of a salt?
Answer» Question 3 (d) Pragya tested the solubility of three different substances at different temperatures and collected the data as given below (results are given in the following table, as grams of substance dissolved in 100 grams of water to form a saturated solution). d. What is the effect of change of temperature on the solubility of a salt?

Discussion

9962.	w C3H8 + x O2 → y H20 + z CO2 The above equation represents a balance chemical reaction, the vaule of w+x+y+z is _______.
Answer» w $C_{3} H_{8}$ + x $O_{2}$ $\to$ y $H_{2} 0$ + z $C O_{2}$ The above equation represents a balance chemical reaction, the vaule of w+x+y+z is _______.

9962.

w C3H8 + x O2 → y H20 + z CO2 The above equation represents a balance chemical reaction, the vaule of w+x+y+z is _______.

Answer»

w $C_{3} H_{8}$ + x $O_{2}$ $\to$ y $H_{2} 0$ + z $C O_{2}$

The above equation represents a balance chemical reaction, the vaule of w+x+y+z is _______.

Discussion

9963.	The density of ice is 0.918 g cm-3 and that of water is 1.03 g cm-3 . An iceberg floats with a portion of 224 m3 outside the surface of water. The total volume of ice berg is:
Answer» The density of ice is 0.918 g cm^-3 and that of water is 1.03 g cm^-3 . An iceberg floats with a portion of 224 m³ outside the surface of water. The total volume of ice berg is:

Discussion

9964.	Three liquids with masses m1,m2,m3 are thoroughly mixed, If their specific heats are c1,c2,c3 and their temperatures T1,T2,T3 respectively, then the temperature of the mixture is
Answer» Three liquids with masses $m_{1}, m_{2}, m_{3}$ are thoroughly mixed, If their specific heats are $c_{1}, c_{2}, c_{3}$ and their temperatures $T_{1}, T_{2}, T_{3}$ respectively, then the temperature of the mixture is

Discussion

9965.	Carbon monoxide emitted by automobiles prevents transport of oxygen in the body due to___________.
Answer» Carbon monoxide emitted by automobiles prevents transport of oxygen in the body due to___________.

Discussion

9966.	How to join two chemical to derive its formula like for hydrogenchloride we use a symbol like HCl how is that possible using their symbol ? I know to create but how to use valency and where to use it I don’t know.
Answer» How to join two chemical to derive its formula like for hydrogenchloride we use a symbol like HCl how is that possible using their symbol ? I know to create but how to use valency and where to use it I don’t know.

Discussion

9967.	In which compound, oxidation state of nitrogen is 1
Answer» In which compound, oxidation state of nitrogen is 1

9967.

In which compound, oxidation state of nitrogen is 1

Answer»

In which compound, oxidation state of nitrogen is 1

Discussion

9968.	Write down the formulae of (i) Sodium oxide (ii) Aluminium chloride (iii) Sodium sulphide [3 MARKS]
Answer» Write down the formulae of (i) Sodium oxide (ii) Aluminium chloride (iii) Sodium sulphide [3 MARKS]

9968.

Write down the formulae of (i) Sodium oxide (ii) Aluminium chloride (iii) Sodium sulphide [3 MARKS]

Answer»

Write down the formulae of

(i) Sodium oxide

(ii) Aluminium chloride

(iii) Sodium sulphide [3 MARKS]

Discussion

9969.	A gas exerts pressure on the walls of the container. Give reasons.
Answer» A gas exerts pressure on the walls of the container. Give reasons.

Discussion

9970.	In an experiment the following reactions take place: X + Y → Z2 g 4 g u g Z + A→ Bu g 7 g c g What is the value of u and c respectively?
Answer» In an experiment the following reactions take place: X + Y → Z 2 g 4 g u g Z + A→ B u g 7 g c g What is the value of u and c respectively?

9970.

In an experiment the following reactions take place: X + Y → Z2 g 4 g u g Z + A→ Bu g 7 g c g What is the value of u and c respectively?

Answer»

In an experiment the following reactions take place:
X + Y → Z

2 g 4 g u g

Z + A→ B

u g 7 g c g

What is the value of u and c respectively?

Discussion

9971.	Which statement about the manufacture of Ammonia by the Haber Process is correct?
Answer» Which statement about the manufacture of Ammonia by the Haber Process is correct?

Discussion

9972.	Excess pollutants emitted by a textile factory located on the banks of river Yamuna results in:
Answer» Excess pollutants emitted by a textile factory located on the banks of river Yamuna results in:

Discussion

9973.	One of the conclusions of Rutherford's alpha particle scattering experiment is that-
Answer» One of the conclusions of Rutherford's alpha particle scattering experiment is that-

Discussion

9974.	What is the weight of CO having the same number of oxygen atoms as much oxygen present in 88 g of CO2?
Answer» What is the weight of CO having the same number of oxygen atoms as much oxygen present in 88 g of ${CO}_{2}$ ?

Discussion

9975.	Which among the following is the correct formula of Glauber's salt?
Answer» Which among the following is the correct formula of Glauber's salt?

Discussion

9976.	Which of the following compounds have the same ratio of sulphur to oxygen atoms?
Answer» Which of the following compounds have the same ratio of sulphur to oxygen atoms?

Discussion

9977.	Which has more number of atoms, 100 grams of sodium or 100 grams of iron (given, atomic mass of Na = 23 u, Fe = 56 u)? [3 MARKS]
Answer» Which has more number of atoms, 100 grams of sodium or 100 grams of iron (given, atomic mass of Na = 23 u, Fe = 56 u)? [3 MARKS]

Discussion

9978.	Which one of the following set phenomena would increase on raising the temperature? (a) diffusion, evaporation, compression of gases (b) evaporation, compression of gases, solubility (c) evaporation, diffusion, expansion of gases (d) evaporation, solubility, diffusion, compression of gases
Answer» Which one of the following set phenomena would increase on raising the temperature? (a) diffusion, evaporation, compression of gases (b) evaporation, compression of gases, solubility (c) evaporation, diffusion, expansion of gases (d) evaporation, solubility, diffusion, compression of gases

9978.

Which one of the following set phenomena would increase on raising the temperature? (a) diffusion, evaporation, compression of gases (b) evaporation, compression of gases, solubility (c) evaporation, diffusion, expansion of gases (d) evaporation, solubility, diffusion, compression of gases

Answer»

Which one of the following set phenomena would increase on raising the temperature?

(a) diffusion, evaporation, compression of gases

(b) evaporation, compression of gases, solubility

(c) evaporation, diffusion, expansion of gases

(d) evaporation, solubility, diffusion, compression of gases

Discussion

9979.	Which of the following terms are unitless ? (a) Molality (b) Molarity (c) Mole fraction (d) Mass per cent
Answer» Which of the following terms are unitless ? (a) Molality (b) Molarity (c) Mole fraction (d) Mass per cent

9979.

Which of the following terms are unitless ? (a) Molality (b) Molarity (c) Mole fraction (d) Mass per cent

Answer»

Which of the following terms are unitless ?

(a) Molality (b) Molarity (c) Mole fraction (d) Mass per cent

Discussion

9980.	What is the principle and application used in the method of filteration
Answer» What is the principle and application used in the method of filteration

Discussion

9981.	If we give or take energy to an electron can it jump to a higher shell or to lower shell leaving it's own position
Answer» If we give or take energy to an electron can it jump to a higher shell or to lower shell leaving it's own position

Discussion

9982.	Water is considered a compound and not a mixture why?
Answer» Water is considered a compound and not a mixture why?

Discussion

9983.	Why Avogadro's number is only 6.022*10 to the power of 23
Answer» Why Avogadro's number is only 6.022*10 to the power of 23

Discussion

9984.	What is the type of reaction between sodium sulphate and barium chloride?
Answer» What is the type of reaction between sodium sulphate and barium chloride?

Discussion

9985.	Effect of change of pressure defaniton
Answer» Effect of change of pressure defaniton

Discussion

9986.	Fumes are obtained by:
Answer» Fumes are obtained by:

Discussion

9987.	(a) What is the relationship between the Celcius and the Kelvin scales of temperature? (b) Convert (i) 273∘C (ii) 293 K to ∘C
Answer» (a) What is the relationship between the Celcius and the Kelvin scales of temperature? (b) Convert (i) $273^{\circ} C$ (ii) 293 K to $^{\circ} C$

Discussion

9988.	State whether the following statements are true or false : (a) A sodium ion has positive charge because it has more protons than a neutral atom. (b) A chloride ion has negative charge because it has more electrons than a neutral atom.
Answer» State whether the following statements are true or false : (a) A sodium ion has positive charge because it has more protons than a neutral atom. (b) A chloride ion has negative charge because it has more electrons than a neutral atom.

Discussion

9989.	___ has been causing most damage to the Taj Mahal.
Answer» ___ has been causing most damage to the Taj Mahal.

Discussion

9990.	Which of the following species are ions? Cl−, Fe3+, NO3−, FeCl2, OH−, SO42−, H2O, C12H22O11
Answer» Which of the following species are ions? ${C l}^{-}$ , ${F e}^{3 +}$ , ${N O}_{3}^{-}$ , ${F e C l}_{2}$ , ${O H}^{-}$ , ${S O}_{4}^{2 -}$ , $H_{2} O$ , $C_{12} H_{22} O_{11}$

9990.

Which of the following species are ions? Cl−, Fe3+, NO3−, FeCl2, OH−, SO42−, H2O, C12H22O11

Answer»

Which of the following species are ions?

${C l}^{-}$ , ${F e}^{3 +}$ , ${N O}_{3}^{-}$ , ${F e C l}_{2}$ , ${O H}^{-}$ , ${S O}_{4}^{2 -}$ , $H_{2} O$ , $C_{12} H_{22} O_{11}$

Discussion

9991.	Describe the method, which can be used to separate two compounds with different solubilities in a solvent S.
Answer» Describe the method, which can be used to separate two compounds with different solubilities in a solvent S.

Discussion

9992.	State whether the following statements are true or false. (a) Alcohol can be separated from a mixture of alcohol and water by a separating funnel. (b) Salt and water can be recovered from an aqueous salt solution by the process of evaporation.
Answer» State whether the following statements are true or false. (a) Alcohol can be separated from a mixture of alcohol and water by a separating funnel. (b) Salt and water can be recovered from an aqueous salt solution by the process of evaporation.

9992.

State whether the following statements are true or false. (a) Alcohol can be separated from a mixture of alcohol and water by a separating funnel. (b) Salt and water can be recovered from an aqueous salt solution by the process of evaporation.

Answer»

State whether the following statements are true or false.

(a) Alcohol can be separated from a mixture of alcohol and water by a separating funnel.

(b) Salt and water can be recovered from an aqueous salt solution by the process of evaporation.

Discussion

9993.	Whats is em value for electrons ?
Answer» Whats is $\frac{e}{m}$ value for electrons ?

Discussion

9994.	How many electrons (maximum) can be present in the first shell?
Answer» How many electrons (maximum) can be present in the first shell?

Discussion

9995.	Molecular mass of polymer is
Answer» Molecular mass of polymer is

Discussion

9996.	Effect of change of temperature meaning and defenition
Answer» Effect of change of temperature meaning and defenition

Discussion

9997.	What is the difference between atomic mass and atomic weight
Answer» What is the difference between atomic mass and atomic weight

Discussion

9998.	Mole means –
Answer» Mole means –

Discussion

9999.	Explain the characteristics of particles of matter
Answer» Explain the characteristics of particles of matter

Discussion

10000.	What is Tyndall effect? Does true solution exhibit Tyndall effect.
Answer» What is Tyndall effect? Does true solution exhibit Tyndall effect.

Discussion

Explore topic-wise InterviewSolutions in .

Ice floats on water because : A. Ice is lighter (by mass) than water B. Ice has a lower density than water

Question 3 (b) Name two elements that have two electrons in their outermost shell

Which of the following is the reddish-brown gas released during the decomposition of nitric acid?

In a reaction, In a reaction, 5.3 g of sodium carbonate reacted with 6 g of ethanoic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium ethanoate. Which law is applicable in this case?

How many moles of K2Cr2O7 can be reduced by 1 mole of Sn+2

How to convert 2040 J/kg/Centigrate into J/Kg/kelvin

Covalent polymeric hydride among the following is

Do the formula for ionisation energy i.e IE =13.6 ×z2/n​​​​​​2 is also applicable for non -unielectron species too?

Write a short note on Neutrons. Who discovered these particles? [3 MARKS]

w C3H8 + x O2 → y H20 + z CO2 The above equation represents a balance chemical reaction, the vaule of w+x+y+z is _______.

The density of ice is 0.918 g cm-3 and that of water is 1.03 g cm-3 . An iceberg floats with a portion of 224 m3 outside the surface of water. The total volume of ice berg is:

Three liquids with masses m1,m2,m3 are thoroughly mixed, If their specific heats are c1,c2,c3 and their temperatures T1,T2,T3 respectively, then the temperature of the mixture is

Carbon monoxide emitted by automobiles prevents transport of oxygen in the body due to___________.

How to join two chemical to derive its formula like for hydrogenchloride we use a symbol like HCl how is that possible using their symbol ? I know to create but how to use valency and where to use it I don’t know.

In which compound, oxidation state of nitrogen is 1

Write down the formulae of (i) Sodium oxide (ii) Aluminium chloride (iii) Sodium sulphide [3 MARKS]​

A gas exerts pressure on the walls of the container. Give reasons.

In an experiment the following reactions take place: X + Y → Z2 g 4 g u g Z + A→ Bu g 7 g c g What is the value of u and c respectively?

Which statement about the manufacture of Ammonia by the Haber Process is correct?

Excess pollutants emitted by a textile factory located on the banks of river Yamuna results in:

One of the conclusions of Rutherford's alpha particle scattering experiment is that-

What is the weight of CO having the same number of oxygen atoms as much oxygen present in 88 g of CO2?

Which among the following is the correct formula of Glauber's salt?

Which of the following compounds have the same ratio of sulphur to oxygen atoms?

Which has more number of atoms, 100 grams of sodium or 100 grams of iron (given, atomic mass of Na = 23 u, Fe = 56 u)? [3 MARKS]

Which one of the following set phenomena would increase on raising the temperature? (a) diffusion, evaporation, compression of gases (b) evaporation, compression of gases, solubility (c) evaporation, diffusion, expansion of gases (d) evaporation, solubility, diffusion, compression of gases

Which of the following terms are unitless ? (a) Molality (b) Molarity (c) Mole fraction (d) Mass per cent

What is the principle and application used in the method of filteration

If we give or take energy to an electron can it jump to a higher shell or to lower shell leaving it's own position

Water is considered a compound and not a mixture why?

Why Avogadro's number is only 6.022*10 to the power of 23

What is the type of reaction between sodium sulphate and barium chloride?

Effect of change of pressure defaniton

Fumes are obtained by:

(a) What is the relationship between the Celcius and the Kelvin scales of temperature? (b) Convert (i) 273∘C (ii) 293 K to ∘C

State whether the following statements are true or false : (a) A sodium ion has positive charge because it has more protons than a neutral atom. (b) A chloride ion has negative charge because it has more electrons than a neutral atom.

___ has been causing most damage to the Taj Mahal.

Which of the following species are ions? Cl−, Fe3+, NO3−, FeCl2, OH−, SO42−, H2O, C12H22O11

Describe the method, which can be used to separate two compounds with different solubilities in a solvent S.

State whether the following statements are true or false. (a) Alcohol can be separated from a mixture of alcohol and water by a separating funnel. (b) Salt and water can be recovered from an aqueous salt solution by the process of evaporation.

Whats is em value for electrons ?

How many electrons (maximum) can be present in the first shell?

Molecular mass of polymer is

Effect of change of temperature meaning and defenition

What is the difference between atomic mass and atomic weight

Mole means –

Explain the characteristics of particles of matter

What is Tyndall effect? Does true solution exhibit Tyndall effect.

Do the formula for ionisation energy i.e IE =13.6 ×z2/n2 is also applicable for non -unielectron species too?

Write down the formulae of (i) Sodium oxide (ii) Aluminium chloride (iii) Sodium sulphide [3 MARKS]