10223 + Interview Questions in Chemistry Page 143 InterviewSolution

7101.	The volume of a gas at 273.15°C and 2.5 bar is 150 dm3. At the same pressure, what will be the volume of the gas at 0°C?
Answer» The volume of a gas at 273.15°C and 2.5 bar is 150 dm³. At the same pressure, what will be the volume of the gas at 0°C?

Discussion

7102.	What is the difference between vapour and gas?
Answer» What is the difference between vapour and gas?

Discussion

7103.	(i) Electropositive nature of the element(s) increases down the group and decreases across the period (ii) Electronegativity of the element decreases down the group and increases across the period (iii) Atomic size increases down the group and decreases across a period (left to right) (iv) Metallic character increases down the group and decreases across a period. On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9. Name the element which is a metalloid
Answer» (i) Electropositive nature of the element(s) increases down the group and decreases across the period (ii) Electronegativity of the element decreases down the group and increases across the period (iii) Atomic size increases down the group and decreases across a period (left to right) (iv) Metallic character increases down the group and decreases across a period. On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9. Name the element which is a metalloid

Discussion

7104.	Calculate the number of moles in 12.046 *10 raised to 23 number of helium atoms
Answer» Calculate the number of moles in 12.046 *10 raised to 23 number of helium atoms

Discussion

7105.	Nitric acid is________
Answer» Nitric acid is________

Discussion

7106.	Give the general group study of hydrogen with reference to (i) valence electrons (ii) burning (iii) reducing power.
Answer» Give the general group study of hydrogen with reference to (i) valence electrons (ii) burning (iii) reducing power.

7106.

Give the general group study of hydrogen with reference to (i) valence electrons (ii) burning (iii) reducing power.

Answer»

Give the general group study of hydrogen with reference to

(i) valence electrons (ii) burning

(iii) reducing power.

Discussion

7107.	The rate of reaction is defined as:
Answer» The rate of reaction is defined as:

Discussion

7108.	State few examples of redox reactions in daily life.
Answer» State few examples of redox reactions in daily life.

Discussion

7109.	The chemical reaction either caused or accompanied by the passage of an electric current are called _______ reactions.
Answer» The chemical reaction either caused or accompanied by the passage of an electric current are called _______ reactions.

Discussion

7110.	__ series of carbon compounds has different number of carbon atoms but contain the same functional group.
Answer» __ series of carbon compounds has different number of carbon atoms but contain the same functional group.

Discussion

7111.	An inorganic compound (A) is a strong reducing agent. Its hydrolysis in water gives a white turbidity (B). Aqueous solution of (A) gives a white precipitate (C) with NaOH solution which is soluble in excess of NaOH. (A) reduces auric chloride to produce purple of cassius. (A) also reduces iodine and gives chromyl chloride test. What are (A) to (C) and give the chemical reactions.
Answer» An inorganic compound (A) is a strong reducing agent. Its hydrolysis in water gives a white turbidity (B). Aqueous solution of (A) gives a white precipitate (C) with NaOH solution which is soluble in excess of NaOH. (A) reduces auric chloride to produce purple of cassius. (A) also reduces iodine and gives chromyl chloride test. What are (A) to (C) and give the chemical reactions.

Discussion

7112.	The graph shown below illustrates which law?
Answer» The graph shown below illustrates which law?

Discussion

7113.	Give two reasons to justify - 1 water at room temperature is liquid. 2 iron almirah is solid at room temperature.
Answer» Give two reasons to justify - 1 water at room temperature is liquid. 2 iron almirah is solid at room temperature.

7113.

Give two reasons to justify - 1 water at room temperature is liquid. 2 iron almirah is solid at room temperature.

Answer»

Give two reasons to justify -

1 water at room temperature is liquid.

2 iron almirah is solid at room temperature.

Discussion

7114.	The shell closest to the nucleus of an atom
Answer» The shell closest to the nucleus of an atom

Discussion

7115.	Why oxygen was removed from being considered as the standard unit for measuring the atomic mass.? And now why we are using carbon 12 atom? what is carbo 12 atom?
Answer» Why oxygen was removed from being considered as the standard unit for measuring the atomic mass.? And now why we are using carbon 12 atom? what is carbo 12 atom?

Discussion

7116.	What are nucleon? What are their number called?
Answer» What are nucleon? What are their number called?

Discussion

7117.	A solution made by dissolving 50gm of glucose in 250gm of water. Calculate the concentration of this solution in mass?
Answer» A solution made by dissolving 50gm of glucose in 250gm of water. Calculate the concentration of this solution in mass?

Discussion

7118.	I saw in the video that in collidation the particles cannot be seen but in rays of light we are able to see the particles. Why?
Answer» I saw in the video that in collidation the particles cannot be seen but in rays of light we are able to see the particles. Why?

Discussion

7119.	Can all types of matter change its state meaning every solid to a liquid or gas or every liquid to a solid or gasetc
Answer» Can all types of matter change its state meaning every solid to a liquid or gas or every liquid to a solid or gasetc

Discussion

7120.	What is the general name of CaCO3?
Answer» What is the general name of $C a C O_{3}$ ?

Discussion

7121.	A sample of Ethane gas has the same mass as 1.5*10^20 molecules of Methane. How many ethane sample of gas contain?
Answer» A sample of Ethane gas has the same mass as 1.5*10^20 molecules of Methane. How many ethane sample of gas contain?

Discussion

7122.	(a) State the main points of difference between homogeneous and heterogeneous mixtures. (b) Classify the following materials as homogeneous mixtures and heterogeneous mixtures: Soda-water, Wood, Air, Soil, Vinegar, Alcholol and water mixture, Petrol and water mixture, Chalk and water mixture, Sugar and water mixture, Copper sulphate solution.
Answer» (a) State the main points of difference between homogeneous and heterogeneous mixtures. (b) Classify the following materials as homogeneous mixtures and heterogeneous mixtures: Soda-water, Wood, Air, Soil, Vinegar, Alcholol and water mixture, Petrol and water mixture, Chalk and water mixture, Sugar and water mixture, Copper sulphate solution.

7122.

(a) State the main points of difference between homogeneous and heterogeneous mixtures. (b) Classify the following materials as homogeneous mixtures and heterogeneous mixtures: Soda-water, Wood, Air, Soil, Vinegar, Alcholol and water mixture, Petrol and water mixture, Chalk and water mixture, Sugar and water mixture, Copper sulphate solution.

Answer»

(a) State the main points of difference between homogeneous and heterogeneous mixtures.

(b) Classify the following materials as homogeneous mixtures and heterogeneous mixtures:

Soda-water, Wood, Air, Soil, Vinegar, Alcholol and water mixture, Petrol and water mixture, Chalk and water mixture, Sugar and water mixture, Copper sulphate solution.

Discussion

7123.	It is stated that glass panes fixed to windows of old buildings are invariably found to be slightly thicker at bottom than at the top. In this case what's he conveying to us. Is it that the glass flows down very slowly at room temperature or at high temperature.
Answer» It is stated that glass panes fixed to windows of old buildings are invariably found to be slightly thicker at bottom than at the top. In this case what's he conveying to us. Is it that the glass flows down very slowly at room temperature or at high temperature.

Discussion

7124.	Choose saturated compounds from the following.
Answer» Choose saturated compounds from the following.

Discussion

7125.	How many molecules are there in 1 g of chlorine? ( atomic mass =35.5)
Answer» How many molecules are there in 1 g of chlorine? ( atomic mass =35.5)

Discussion

7126.	If 25 grams of sodium chloride is completely dissolved in 175 grams of water to form a solution, what is the concentration of the solution in mass percent?
Answer» If 25 grams of sodium chloride is completely dissolved in 175 grams of water to form a solution, what is the concentration of the solution in mass percent?

Discussion

7127.	Question 24 Which among the following are unsaturated hydrocarbons? (a) (i) and (iii) (b) (ii) and (iii) (c) (ii) and (iv) (d) (iii) and (iv)
Answer» Question 24 Which among the following are unsaturated hydrocarbons? (a) (i) and (iii) (b) (ii) and (iii) (c) (ii) and (iv) (d) (iii) and (iv)

Discussion

7128.	What are molecules?
Answer» What are molecules?

Discussion

7129.	Which one is not an acid salt?
Answer» Which one is not an acid salt?

Discussion

7130.	What is an unsaturated solution?
Answer» What is an unsaturated solution?

Discussion

7131.	Define mixture.
Answer» Define mixture.

Discussion

7132.	We know that the ionic bonds are more stronger than the covalent bond,so why it is slightly complicated to dissolve the covalent bonded compounds?
Answer» We know that the ionic bonds are more stronger than the covalent bond,so why it is slightly complicated to dissolve the covalent bonded compounds?

Discussion

7133.	Calculate the final volume fo a gas X if the original pressure of the gas, at S.T.P. is doubled and its temperatue is increased three times.
Answer» Calculate the final volume fo a gas X if the original pressure of the gas, at S.T.P. is doubled and its temperatue is increased three times.

Discussion

7134.	Give reasons for the following: (a) all temperatures in the absolute (Kelving) scale are in positive figures. (b) Gases have lower density compared to that of solids or liquids. (c) Gases exert pressure in all directions. (d) It is necessary to specify the pressure and temperature of a gas while stating its volume. (e) inflating a balloon seems to violate Boyle's law. (f) Mountaineers carry oxygen cylinders with theml. (g) gas fills completely the vessel in which it is kept.
Answer» Give reasons for the following: (a) all temperatures in the absolute (Kelving) scale are in positive figures. (b) Gases have lower density compared to that of solids or liquids. (c) Gases exert pressure in all directions. (d) It is necessary to specify the pressure and temperature of a gas while stating its volume. (e) inflating a balloon seems to violate Boyle's law. (f) Mountaineers carry oxygen cylinders with theml. (g) gas fills completely the vessel in which it is kept.

Discussion

7135.	The change in the average kinetic energy of neon atoms when the temperature is raised from 20oC to 40oC is
Answer» The change in the average kinetic energy of neon atoms when the temperature is raised from 20^oC to 40^oC is

Discussion

7136.	Question 26 In the atom of an element X, 6 electrons are present in the outermost shell. If it acquires noble gas configuration by accepting the requisite number of electrons, then what would be the charge on the ion so formed?
Answer» Question 26 In the atom of an element X, 6 electrons are present in the outermost shell. If it acquires noble gas configuration by accepting the requisite number of electrons, then what would be the charge on the ion so formed?

Discussion

7137.	What age decomposition reaction explain with example
Answer» What age decomposition reaction explain with example

Discussion

7138.	With an help of an activity demonstrate that particles of matter are continuously moving
Answer» With an help of an activity demonstrate that particles of matter are continuously moving

Discussion

7139.	If a proton and an α-particle enter in a uniform magnetic field with the same velocity, what will be the period of rotation of the proton?
Answer» If a proton and an α-particle enter in a uniform magnetic field with the same velocity, what will be the period of rotation of the proton?

Discussion

7140.	An inorganic compound (A) shows the following reactions i) It is white solid exists as dimmer and gives fumes of (B) with wet air ii) It sublimes in 180∘C and form monomer If heated to 400∘C iii) Its aq solution turns blue litmus to red. iv) Addition of NH4OH and NaOH separately to a solution of (A) gives white ppt which is however soluble in excess of NaOH. What is 'A'
Answer» An inorganic compound (A) shows the following reactions i) It is white solid exists as dimmer and gives fumes of (B) with wet air ii) It sublimes in $180^{\circ} C$ and form monomer If heated to $400^{\circ} C$ iii) Its aq solution turns blue litmus to red. iv) Addition of $N H_{4} O H$ and NaOH separately to a solution of (A) gives white ppt which is however soluble in excess of NaOH. What is 'A'

7140.

An inorganic compound (A) shows the following reactions i) It is white solid exists as dimmer and gives fumes of (B) with wet air ii) It sublimes in 180∘C and form monomer If heated to 400∘C iii) Its aq solution turns blue litmus to red. iv) Addition of NH4OH and NaOH separately to a solution of (A) gives white ppt which is however soluble in excess of NaOH. What is 'A'

Answer»

An inorganic compound (A) shows the following reactions

i) It is white solid exists as dimmer and gives fumes of (B) with wet air

ii) It sublimes in $180^{\circ} C$ and form monomer If heated to $400^{\circ} C$

iii) Its aq solution turns blue litmus to red.

iv) Addition of $N H_{4} O H$ and NaOH separately to a solution of (A) gives white ppt

which is however soluble in excess of NaOH. What is 'A'

Discussion

7141.	Ideally, the molecular motion completely ceases at what temperature?
Answer» Ideally, the molecular motion completely ceases at what temperature?

Discussion

7142.	Which has more atoms, 200gms of argon or 200 gms of neon? __
Answer» Which has more atoms, 200gms of argon or 200 gms of neon? __

Discussion

7143.	What is a water cycle?
Answer» What is a water cycle?

Discussion

7144.	A substance undergoes first order decomposition involving two parallel first order reaction as : The mol percent of B in the product is :
Answer» A substance undergoes first order decomposition involving two parallel first order reaction as : The mol percent of B in the product is :

Discussion

7145.	Smog is formed by the combination of
Answer» Smog is formed by the combination of

Discussion

7146.	The maximum capacity of the first shell is
Answer» The maximum capacity of the first shell is

Discussion

7147.	On heating, calcium carbonate get converted in calcium oxide and carbon dioxide. a.) Is this a physical or chemical change b.) Can you prepare one acidic and one basic solution by using the products formed in the above process, write the chemical equation involved?
Answer» On heating, calcium carbonate get converted in calcium oxide and carbon dioxide. a.) Is this a physical or chemical change b.) Can you prepare one acidic and one basic solution by using the products formed in the above process, write the chemical equation involved?

Discussion

7148.	Which of the following reactions represents a double displacement reaction?
Answer» Which of the following reactions represents a double displacement reaction?

Discussion

7149.	State the following: (a) Volume of a gas at 0 Kelvin. (b) Absolute temperature of a gas at 7∘C. (c) gas equation. (d) Ice point in absoulute temperature. (e) S.T.P. conditions
Answer» State the following: (a) Volume of a gas at 0 Kelvin. (b) Absolute temperature of a gas at $7^{\circ} C .$ (c) gas equation. (d) Ice point in absoulute temperature. (e) S.T.P. conditions

Discussion

7150.	You are given a 15% solution of sulphuric acid and a 15% solution of HCN (hydrocyanic acid). Which solution has the higher concentration of H+ ions?
Answer» You are given a 15% solution of sulphuric acid and a 15% solution of $H C N$ (hydrocyanic acid). Which solution has the higher concentration of $H^{+}$ ions?

Discussion

Explore topic-wise InterviewSolutions in .

The volume of a gas at 273.15°C and 2.5 bar is 150 dm3. At the same pressure, what will be the volume of the gas at 0°C?

What is the difference between vapour and gas?

Calculate the number of moles in 12.046 *10 raised to 23 number of helium atoms

Nitric acid is________

Give the general group study of hydrogen with reference to (i) valence electrons (ii) burning (iii) reducing power.

The rate of reaction is defined as:

State few examples of redox reactions in daily life.

The chemical reaction either caused or accompanied by the passage of an electric current are called _______ reactions.

__ series of carbon compounds has different number of carbon atoms but contain the same functional group.

The graph shown below illustrates which law?

Give two reasons to justify - 1 water at room temperature is liquid. 2 iron almirah is solid at room temperature.

The shell closest to the nucleus of an atom

Why oxygen was removed from being considered as the standard unit for measuring the atomic mass.? And now why we are using carbon 12 atom? what is carbo 12 atom?

What are nucleon? What are their number called?

A solution made by dissolving 50gm of glucose in 250gm of water. Calculate the concentration of this solution in mass?

I saw in the video that in collidation the particles cannot be seen but in rays of light we are able to see the particles. Why?

Can all types of matter change its state meaning every solid to a liquid or gas or every liquid to a solid or gasetc

What is the general name of CaCO3?

A sample of Ethane gas has the same mass as 1.5*10^20 molecules of Methane. How many ethane sample of gas contain?

It is stated that glass panes fixed to windows of old buildings are invariably found to be slightly thicker at bottom than at the top. In this case what's he conveying to us. Is it that the glass flows down very slowly at room temperature or at high temperature.

Choose saturated compounds from the following.

How many molecules are there in 1 g of chlorine? ( atomic mass =35.5)

If 25 grams of sodium chloride is completely dissolved in 175 grams of water to form a solution, what is the concentration of the solution in mass percent?

Question 24 Which among the following are unsaturated hydrocarbons? (a) (i) and (iii) (b) (ii) and (iii) (c) (ii) and (iv) (d) (iii) and (iv)

What are molecules?

Which one is not an acid salt?

What is an unsaturated solution?

Define mixture.

We know that the ionic bonds are more stronger than the covalent bond,so why it is slightly complicated to dissolve the covalent bonded compounds?

Calculate the final volume fo a gas X if the original pressure of the gas, at S.T.P. is doubled and its temperatue is increased three times.

The change in the average kinetic energy of neon atoms when the temperature is raised from 20oC to 40oC is

Question 26 In the atom of an element X, 6 electrons are present in the outermost shell. If it acquires noble gas configuration by accepting the requisite number of electrons, then what would be the charge on the ion so formed?

What age decomposition reaction explain with example

With an help of an activity demonstrate that particles of matter are continuously moving

If a proton and an α-particle enter in a uniform magnetic field with the same velocity, what will be the period of rotation of the proton?

Ideally, the molecular motion completely ceases at what temperature?

Which has more atoms, 200gms of argon or 200 gms of neon? __

What is a water cycle?

A substance undergoes first order decomposition involving two parallel first order reaction as : The mol percent of B in the product is :

Smog is formed by the combination of

The maximum capacity of the first shell is

On heating, calcium carbonate get converted in calcium oxide and carbon dioxide. a.) Is this a physical or chemical change b.) Can you prepare one acidic and one basic solution by using the products formed in the above process, write the chemical equation involved? ​​​​

Which of the following reactions represents a double displacement reaction?

State the following: (a) Volume of a gas at 0 Kelvin. (b) Absolute temperature of a gas at 7∘C. (c) gas equation. (d) Ice point in absoulute temperature. (e) S.T.P. conditions

You are given a 15% solution of sulphuric acid and a 15% solution of HCN (hydrocyanic acid). Which solution has the higher concentration of H+ ions?

On heating, calcium carbonate get converted in calcium oxide and carbon dioxide. a.) Is this a physical or chemical change b.) Can you prepare one acidic and one basic solution by using the products formed in the above process, write the chemical equation involved?