10223 + Interview Questions in Chemistry Page 160 InterviewSolution

7951.	the melting point of hydrogen is -259.87C and its boiling point is -252C. This means at this very low temperature -252*C hydrogen in the form of gas ?
Answer» the melting point of hydrogen is -259.87C and its boiling point is -252C. This means at this very low temperature -252*C hydrogen in the form of gas ?

Discussion

7952.	Assertion: The group 18 consists of elements which are in gaseous state under ordinary conditions Reason: All the elements of group 18 have stable configuration
Answer» Assertion: The group 18 consists of elements which are in gaseous state under ordinary conditions Reason: All the elements of group 18 have stable configuration

Discussion

7953.	How will you distinguish a colloid from a solution ?
Answer» How will you distinguish a colloid from a solution ?

Discussion

7954.	Consider the diagram below to identify the gas X. Gas X is
Answer» Consider the diagram below to identify the gas X. Gas X is

7954.

Consider the diagram below to identify the gas X. Gas X is

Answer»

Consider the diagram below to identify the gas X.

Gas X is

Discussion

7955.	define saturated dilute and concentrated solutions
Answer» define saturated dilute and concentrated solutions

Discussion

7956.	. Hydrogen gas is absorbed by metal_____ (Cu/Pd)
Answer» . Hydrogen gas is absorbed by metal_____ (Cu/Pd)

Discussion

7957.	Which separation techniques will you apply for the separation of the followingalso explain briefly. a. Benzene from water b. Alcohol from water c. Sugar from glass pieces D. Iodine from charcoal e. Sulphur from carbon f. Dye from ink
Answer» Which separation techniques will you apply for the separation of the followingalso explain briefly. a. Benzene from water b. Alcohol from water c. Sugar from glass pieces D. Iodine from charcoal e. Sulphur from carbon f. Dye from ink

7957.

Which separation techniques will you apply for the separation of the followingalso explain briefly. a. Benzene from water b. Alcohol from water c. Sugar from glass pieces D. Iodine from charcoal e. Sulphur from carbon f. Dye from ink

Answer»

Which separation techniques will you apply for the separation of the followingalso explain briefly.

a. Benzene from water

b. Alcohol from water

c. Sugar from glass pieces

D. Iodine from charcoal

e. Sulphur from carbon

f. Dye from ink

Discussion

7958.	Why does at water zero degree celsius have more energy than ice at the same temperature? Explain your answer in terms of latent heat of vaporisation
Answer» Why does at water zero degree celsius have more energy than ice at the same temperature? Explain your answer in terms of latent heat of vaporisation

Discussion

7959.	How can we separate ammonium chloride from camphor?
Answer» How can we separate ammonium chloride from camphor?

Discussion

7960.	The charge of a proton is___.
Answer» The charge of a proton is___.

Discussion

7961.	WHAT DOES STOICHIOMETRY MEAN? WHAT IS STOICHIOMETRIC COEFFICIENT ?
Answer» WHAT DOES STOICHIOMETRY MEAN? WHAT IS STOICHIOMETRIC COEFFICIENT ?

Discussion

7962.	How does a colloid help in the formation of a delta in everyday life?
Answer» How does a colloid help in the formation of a delta in everyday life?

Discussion

7963.	Question 41 What are the postulates of Bohr's model of an atom?
Answer» Question 41 What are the postulates of Bohr's model of an atom?

Discussion

7964.	Simple distillation is used for liquids which have boiling point ___________
Answer» Simple distillation is used for liquids which have boiling point ___________

Discussion

7965.	Which technique is used to separate blood cells from plasma?
Answer» Which technique is used to separate blood cells from plasma?

Discussion

7966.	Question 1.1 A solution of a substance ‘X’ is used for white washing. (i) Name the substance ‘X’ and write its formula.
Answer» Question 1.1 A solution of a substance ‘X’ is used for white washing. (i) Name the substance ‘X’ and write its formula.

Discussion

7967.	Which of the following are isotopes and which are isobars? Argon, Deuterium, Calcium, Tritium, Protium
Answer» Which of the following are isotopes and which are isobars? Argon, Deuterium, Calcium, Tritium, Protium

7967.

Which of the following are isotopes and which are isobars? Argon, Deuterium, Calcium, Tritium, Protium

Answer»

Which of the following are isotopes and which are isobars?

Argon, Deuterium, Calcium, Tritium, Protium

Discussion

7968.	The high solubility of ammonia gas in water can be demonstrated by the
Answer» The high solubility of ammonia gas in water can be demonstrated by the

Discussion

7969.	In a diamond, every carbon atom is joint to how many carbon atoms by covalent bond?
Answer» In a diamond, every carbon atom is joint to how many carbon atoms by covalent bond?

Discussion

7970.	Difference between atoms and molecules
Answer» Difference between atoms and molecules

Discussion

7971.	How to separate napthlene and ammonium chloride from a mixture. Show with an activity
Answer» How to separate napthlene and ammonium chloride from a mixture. Show with an activity

Discussion

7972.	A neutron exerts a force on a proton which is:
Answer» A neutron exerts a force on a proton which is:

Discussion

7973.	What is plasma and what are it's examples .
Answer» What is plasma and what are it's examples .

Discussion

7974.	Among the following, the rate of formation of bubbles, when it is reacted with acid, is fastest in case of _________.
Answer» Among the following, the rate of formation of bubbles, when it is reacted with acid, is fastest in case of _________.

Discussion

7975.	The following compounds are non-polar except _______.
Answer» The following compounds are non-polar except _______.

Discussion

7976.	Atoms have a lot of space inside them then why don't they merge into another atom?
Answer» Atoms have a lot of space inside them then why don't they merge into another atom?

Discussion

7977.	In which of the following processes do the change in the states of matter involve the absorption of energy? i. Boiling ii.Condensation iii. Melting
Answer» In which of the following processes do the change in the states of matter involve the absorption of energy? i. Boiling ii.Condensation iii. Melting

Discussion

7978.	Rutherford selected gold for alpha particle scattering experiment because (i) Gold was cheaper and brittle. (ii) Gold can be easily hammered into a thin layer of 1000 atoms without breaking it. (iii) Gold does not chemically react with alpha particle.
Answer» Rutherford selected gold for alpha particle scattering experiment because (i) Gold was cheaper and brittle. (ii) Gold can be easily hammered into a thin layer of 1000 atoms without breaking it. (iii) Gold does not chemically react with alpha particle.

Discussion

7979.	What was the main drawback of Rutherford's model? [2 MARKS]
Answer» What was the main drawback of Rutherford's model? [2 MARKS]

Discussion

7980.	Write the use of colloids.
Answer» Write the use of colloids.

Discussion

7981.	What are the conditions for 'something' to be called 'matter'?
Answer» What are the conditions for 'something' to be called 'matter'?

Discussion

7982.	Tincture of iodine is a mixture of two materials X and Y. The material Y has a property that its solid form can be converted directly into vapours on heating by a process called Z. (a) What could X be ? (b) What could Y be ? (c) Name the process Z. (d) Which process would you use to recover both the components X and Y from tincture of iodine ? (e) Which process can be used to recover only component Y from tincture of iodine ?
Answer» Tincture of iodine is a mixture of two materials X and Y. The material Y has a property that its solid form can be converted directly into vapours on heating by a process called Z. (a) What could X be ? (b) What could Y be ? (c) Name the process Z. (d) Which process would you use to recover both the components X and Y from tincture of iodine ? (e) Which process can be used to recover only component Y from tincture of iodine ?

7982.

Tincture of iodine is a mixture of two materials X and Y. The material Y has a property that its solid form can be converted directly into vapours on heating by a process called Z. (a) What could X be ? (b) What could Y be ? (c) Name the process Z. (d) Which process would you use to recover both the components X and Y from tincture of iodine ? (e) Which process can be used to recover only component Y from tincture of iodine ?

Answer»

Tincture of iodine is a mixture of two materials X and Y. The material Y has a property that its solid form can be converted directly into vapours on heating by a process called Z.

(a) What could X be ?

(b) What could Y be ?

(c) Name the process Z.

(d) Which process would you use to recover both the components X and Y from tincture of iodine ?

(e) Which process can be used to recover only component Y from tincture of iodine ?

Discussion

7983.	Look at the figure given below. The increasing dilution of potassium permanganate solution with water fades the pink colour of the solution. This explains which property of matter?
Answer» Look at the figure given below. The increasing dilution of potassium permanganate solution with water fades the pink colour of the solution. This explains which property of matter?

7983.

Look at the figure given below. The increasing dilution of potassium permanganate solution with water fades the pink colour of the solution. This explains which property of matter?

Answer»

Look at the figure given below.

The increasing dilution of potassium permanganate solution with water fades the pink colour of the solution. This explains which property of matter?

Discussion

7984.	Nucleons contain:
Answer» Nucleons contain:

Discussion

7985.	16 g of radioactive radon is kept in a container. How much radon will disintegrate in 19 days? Half life of radon is 3.8 days.
Answer» 16 g of radioactive radon is kept in a container. How much radon will disintegrate in 19 days? Half life of radon is 3.8 days.

Discussion

7986.	The latent heat of vaporisation of water is: (a) 2.25×106J/Kg (a) 3.34×106J/Kg (c) 2.25×104J/Kg (d) 33.4×105J/Kg
Answer» The latent heat of vaporisation of water is: (a) $2.25 \times 10^{6} J / K g$ (a) $3.34 \times 10^{6} J / K g$ (c) $2.25 \times 10^{4} J / K g$ (d) $33.4 \times 10^{5} J / K g$

Discussion

7987.	Which of the following cannot be separated from air by the process of fractional distillation ? (a) oxygen (b) argon (c) hydrogen (d) nitrogen
Answer» Which of the following cannot be separated from air by the process of fractional distillation ? (a) oxygen (b) argon (c) hydrogen (d) nitrogen

7987.

Which of the following cannot be separated from air by the process of fractional distillation ? (a) oxygen (b) argon (c) hydrogen (d) nitrogen

Answer»

Which of the following cannot be separated from air by the process of fractional distillation ?

(a) oxygen (b) argon (c) hydrogen (d) nitrogen

Discussion

7988.	Mass of the atom is mainly due to.............. and................
Answer» Mass of the atom is mainly due to.............. and................

Discussion

7989.	Which of the following are physical changes and which are chemical changes? (a) Burning of a magnesium wire (b) Freezing of water (c) Rusting of iron (d) Glowing of an electric bulb
Answer» Which of the following are physical changes and which are chemical changes? (a) Burning of a magnesium wire (b) Freezing of water (c) Rusting of iron (d) Glowing of an electric bulb

7989.

Which of the following are physical changes and which are chemical changes? (a) Burning of a magnesium wire (b) Freezing of water (c) Rusting of iron (d) Glowing of an electric bulb

Answer»

Which of the following are physical changes and which are chemical changes?

(a) Burning of a magnesium wire

(b) Freezing of water

(c) Rusting of iron

(d) Glowing of an electric bulb

Discussion

7990.	What is negatively chargrd atoms and positively charged atoms
Answer» What is negatively chargrd atoms and positively charged atoms

Discussion

7991.	Hydrogen is obtained by displacement from : (a) dilute sulphuric acid (b) dilute hydrochloric acid Write equations using zinc and Iron. Why does copper not show similar behaviour ?
Answer» Hydrogen is obtained by displacement from : (a) dilute sulphuric acid (b) dilute hydrochloric acid Write equations using zinc and Iron. Why does copper not show similar behaviour ?

7991.

Hydrogen is obtained by displacement from : (a) dilute sulphuric acid (b) dilute hydrochloric acid Write equations using zinc and Iron. Why does copper not show similar behaviour ?

Answer»

Hydrogen is obtained by displacement from :

(a) dilute sulphuric acid

(b) dilute hydrochloric acid

Write equations using zinc and Iron.

Why does copper not show similar behaviour ?

Discussion

7992.	Calculate the molecular mass of hydrogen bromide (HBr). (Atomic masses: H = 1 u; Br = 80 u)
Answer» Calculate the molecular mass of hydrogen bromide (HBr). (Atomic masses: H = 1 u; Br = 80 u)

Discussion

7993.	Which of the following is/are in accordance with Dalton’s atomic theory?
Answer» Which of the following is/are in accordance with Dalton’s atomic theory?

Discussion

7994.	Take some water in a container and seal it. Place it on a heater. The water starts boiling and changes into vapour. Now allow the container to cool down for some time and then open the seal. What will happen to the amount of water?
Answer» Take some water in a container and seal it. Place it on a heater. The water starts boiling and changes into vapour. Now allow the container to cool down for some time and then open the seal. What will happen to the amount of water?

Discussion

7995.	What mass of Nitrogen, N2, will contain the same number of molecules as 1.8g of water, H2O?
Answer» What mass of Nitrogen, N₂, will contain the same number of molecules as 1.8g of water, H₂O?

Discussion

7996.	What is meant by 'negative and positive charges are equal in magnitude , so the atom as a whoke is neutral' ?
Answer» What is meant by 'negative and positive charges are equal in magnitude , so the atom as a whoke is neutral' ?

Discussion

7997.	Q1. Name the three sub atomic particles of an atom.
Answer» Q1. Name the three sub atomic particles of an atom.

Discussion

7998.	The amount of a solute present in its saturated solution at a given temperature is called the solubility of the solute at that temperature. The solubility of an unknown substance in water at 50°C is 30g. The solubility of the given substance in water at 100°C would be
Answer» The amount of a solute present in its saturated solution at a given temperature is called the solubility of the solute at that temperature. The solubility of an unknown substance in water at 50°C is 30g. The solubility of the given substance in water at 100°C would be

7998.

The amount of a solute present in its saturated solution at a given temperature is called the solubility of the solute at that temperature. The solubility of an unknown substance in water at 50°C is 30g. The solubility of the given substance in water at 100°C would be

Answer»

The amount of a solute present in its saturated solution at a given temperature is called the solubility of the solute at that temperature.

The solubility of an unknown substance in water at 50°C is 30g.

The solubility of the given substance in water at 100°C would be

Discussion

7999.	Statement 1: The chlorine atom in HCl develops a partial negative charge and hydrogen atoms develop a partial positive charge. Statement 2: A chlorine atom with a lower electronegativity attracts the shared pair of electrons towards its nucleus.
Answer» Statement 1: The chlorine atom in HCl develops a partial negative charge and hydrogen atoms develop a partial positive charge. Statement 2: A chlorine atom with a lower electronegativity attracts the shared pair of electrons towards its nucleus.

7999.

Statement 1: The chlorine atom in HCl develops a partial negative charge and hydrogen atoms develop a partial positive charge. Statement 2: A chlorine atom with a lower electronegativity attracts the shared pair of electrons towards its nucleus.

Answer»

Statement 1: The chlorine atom in HCl develops a partial negative charge and hydrogen atoms develop a partial positive charge.

Statement 2: A chlorine atom with a lower electronegativity attracts the shared pair of electrons towards its nucleus.

Discussion

8000.	What is a chemical bond?
Answer» What is a chemical bond?

Discussion

Explore topic-wise InterviewSolutions in .

the melting point of hydrogen is -259.87*C and its boiling point is -252*C. This means at this very low temperature -252*C hydrogen in the form of gas ?

Assertion: The group 18 consists of elements which are in gaseous state under ordinary conditions Reason: All the elements of group 18 have stable configuration

How will you distinguish a colloid from a solution ?

Consider the diagram below to identify the gas X. Gas X is

define saturated dilute and concentrated solutions

. Hydrogen gas is absorbed by metal_____ (Cu/Pd)

Which separation techniques will you apply for the separation of the followingalso explain briefly. a. Benzene from water b. Alcohol from water c. Sugar from glass pieces D. Iodine from charcoal e. Sulphur from carbon f. Dye from ink

Why does at water zero degree celsius have more energy than ice at the same temperature? Explain your answer in terms of latent heat of vaporisation

How can we separate ammonium chloride from camphor?

The charge of a proton is___.

WHAT DOES STOICHIOMETRY MEAN? WHAT IS STOICHIOMETRIC COEFFICIENT ?

How does a colloid help in the formation of a delta in everyday life?

Question 41 What are the postulates of Bohr's model of an atom?

Simple distillation is used for liquids which have boiling point ___________

Which technique is used to separate blood cells from plasma?

Question 1.1 A solution of a substance ‘X’ is used for white washing. (i) Name the substance ‘X’ and write its formula.

Which of the following are isotopes and which are isobars? Argon, Deuterium, Calcium, Tritium, Protium

The high solubility of ammonia gas in water can be demonstrated by the

In a diamond, every carbon atom is joint to how many carbon atoms by covalent bond?

Difference between atoms and molecules

How to separate napthlene and ammonium chloride from a mixture. Show with an activity

A neutron exerts a force on a proton which is:

What is plasma and what are it's examples .

Among the following, the rate of formation of bubbles, when it is reacted with acid, is fastest in case of _________.

The following compounds are non-polar except _______.

Atoms have a lot of space inside them then why don't they merge into another atom?

In which of the following processes do the change in the states of matter involve the absorption of energy? i. Boiling ii.Condensation iii. Melting

Rutherford selected gold for alpha particle scattering experiment because (i) Gold was cheaper and brittle. (ii) Gold can be easily hammered into a thin layer of 1000 atoms without breaking it. (iii) Gold does not chemically react with alpha particle.

What was the main drawback of Rutherford's model? [2 MARKS]

Write the use of colloids.

What are the conditions for 'something' to be called 'matter'?

Look at the figure given below. The increasing dilution of potassium permanganate solution with water fades the pink colour of the solution. This explains which property of matter?

Nucleons contain:

16 g of radioactive radon is kept in a container. How much radon will disintegrate in 19 days? Half life of radon is 3.8 days.

The latent heat of vaporisation of water is: (a) 2.25×106J/Kg (a) 3.34×106J/Kg (c) 2.25×104J/Kg (d) 33.4×105J/Kg

Which of the following cannot be separated from air by the process of fractional distillation ? (a) oxygen (b) argon (c) hydrogen (d) nitrogen

Mass of the atom is mainly due to.............. and................

Which of the following are physical changes and which are chemical changes? (a) Burning of a magnesium wire (b) Freezing of water (c) Rusting of iron (d) Glowing of an electric bulb

What is negatively chargrd atoms and positively charged atoms

Hydrogen is obtained by displacement from : (a) dilute sulphuric acid (b) dilute hydrochloric acid Write equations using zinc and Iron. Why does copper not show similar behaviour ?

Calculate the molecular mass of hydrogen bromide (HBr). (Atomic masses: H = 1 u; Br = 80 u)

Which of the following is/are in accordance with Dalton’s atomic theory?

Take some water in a container and seal it. Place it on a heater. The water starts boiling and changes into vapour. Now allow the container to cool down for some time and then open the seal. What will happen to the amount of water?

What mass of Nitrogen, N2, will contain the same number of molecules as 1.8g of water, H2O?

What is meant by 'negative and positive charges are equal in magnitude , so the atom as a whoke is neutral' ?

Q1. Name the three sub atomic particles of an atom.

The amount of a solute present in its saturated solution at a given temperature is called the solubility of the solute at that temperature. The solubility of an unknown substance in water at 50°C is 30g. The solubility of the given substance in water at 100°C would be

Statement 1: The chlorine atom in HCl develops a partial negative charge and hydrogen atoms develop a partial positive charge. Statement 2: A chlorine atom with a lower electronegativity attracts the shared pair of electrons towards its nucleus.

What is a chemical bond?

the melting point of hydrogen is -259.87C and its boiling point is -252C. This means at this very low temperature -252*C hydrogen in the form of gas ?