5083 + Interview Questions in Chemistry Page 75 InterviewSolution

3701.	What is exothermic and an endothermic reaction? Amongst the following reactions, identify the exothermic reaction and the endothermic reaction: 1. Heating coal in air to form carbon dioxide. 2. Heating limestone in lime kiln to form quick lime. [3 MARKS]
Answer» What is exothermic and an endothermic reaction? Amongst the following reactions, identify the exothermic reaction and the endothermic reaction: 1. Heating coal in air to form carbon dioxide. 2. Heating limestone in lime kiln to form quick lime. [3 MARKS]

Discussion

3702.	Given that 2Cl−→Cl2+2e−,E∘=−1.36V; H2O→2H++12O2+2e−,E∘=−1.23V. On electrolysing 1M NaCl solution with inert electrodes, which of the following is correct regarding liberation of electrolytic products ?
Answer» Given that $2 C l^{-} \to C l_{2} + 2 e^{-}, E^{\circ} = - 1.36 V;$ $H_{2} O \to 2 H^{+} + \frac{1}{2} O_{2} + 2 e^{-}, E^{\circ} = - 1.23 V .$ On electrolysing 1M NaCl solution with inert electrodes, which of the following is correct regarding liberation of electrolytic products ?

Discussion

3703.	What is an acid?
Answer» What is an acid?

Discussion

3704.	What is quantization?
Answer» What is quantization?

Discussion

3705.	Here is a list of metals and their potentials. Pick the ones which are stronger oxidizing agents than hydrogen electrode. You can pick more than one.
Answer» Here is a list of metals and their potentials. Pick the ones which are stronger oxidizing agents than hydrogen electrode. You can pick more than one.

Discussion

3706.	Which following synthetic fibre is made from a natural material?
Answer» Which following synthetic fibre is made from a natural material?

Discussion

3707.	Which of the following substance(s) pollute water bodies?
Answer» Which of the following substance(s) pollute water bodies?

Discussion

3708.	The definition for pure substances is that they consist of only one type of atoms or molecules then why is it that water even though it has two elements, i.e. , hydrogen and oxygen is called a pure substance
Answer» The definition for pure substances is that they consist of only one type of atoms or molecules then why is it that water even though it has two elements, i.e. , hydrogen and oxygen is called a pure substance

Discussion

3709.	Rusting is the type of corrosion activity on ___.
Answer» Rusting is the type of corrosion activity on ___.

Discussion

3710.	A foamy substance is formed by the rapid decomposition of hydrogen peroxide when hydrogen peroxide is mixed with soap solution and catalyst potassium iodide is added. What is this experiment called?
Answer» A foamy substance is formed by the rapid decomposition of hydrogen peroxide when hydrogen peroxide is mixed with soap solution and catalyst potassium iodide is added. What is this experiment called?

3710.

A foamy substance is formed by the rapid decomposition of hydrogen peroxide when hydrogen peroxide is mixed with soap solution and catalyst potassium iodide is added. What is this experiment called?

Answer»

A foamy substance is formed by the rapid decomposition of hydrogen peroxide when hydrogen peroxide is mixed with soap solution and catalyst potassium iodide is added. What is this experiment called?

Discussion

3711.	Indicator litmus test on diluted hydrochloric acid, diluted sodium hydroxide, diluted nitric acid can you show the effect of litmus paper, effect on turmeric paper, effect on China rose
Answer» Indicator litmus test on diluted hydrochloric acid, diluted sodium hydroxide, diluted nitric acid can you show the effect of litmus paper, effect on turmeric paper, effect on China rose

Discussion

3712.	How does the Meteorological Department help the nation? [5 MARKS]
Answer» How does the Meteorological Department help the nation? [5 MARKS]

Discussion

3713.	If valency of silver is +2 and valency of nitrate is -1,then when they both reacts they form AgNO3.Explain why?
Answer» _{If valency of silver is +2 and valency of nitrate is -1,then when they both reacts they form}AgNO3.Explain why?

Discussion

3714.	During rainy season wooden doors are difficult to open or closure because of
Answer» During rainy season wooden doors are difficult to open or closure because of

Discussion

3715.	Reversible change refers to -
Answer» Reversible change refers to -

Discussion

3716.	A catalyst is a substance which:
Answer» A catalyst is a substance which:

Discussion

3717.	In case of an ant bite which of the following should be applied on the bite to get relief?
Answer» In case of an ant bite which of the following should be applied on the bite to get relief?

Discussion

3718.	What are suspensions?
Answer» What are suspensions?

Discussion

3719.	The given figure shows the rotation and revolution of the earth on its axis and around the sun respectively. What kind of change does the earth undergo?
Answer» The given figure shows the rotation and revolution of the earth on its axis and around the sun respectively. What kind of change does the earth undergo?

Discussion

3720.	Define Rust. Name the factors that hasten the rusting of Iron. What measures can be taken to prevent rusting of Iron? [5 MARKS]
Answer» Define Rust. Name the factors that hasten the rusting of Iron. What measures can be taken to prevent rusting of Iron? [5 MARKS]

Discussion

3721.	Which of these diseases is not caused by improper disposal of sewage?
Answer» Which of these diseases is not caused by improper disposal of sewage?

Discussion

3722.	Soil fertility can be increased by
Answer» Soil fertility can be increased by

Discussion

3723.	When a substance X is mixed with extract of red cabbage, the solution turns light green. We want to mix a substance Y to X such that a salt is formed. Substance Y will:
Answer» When a substance X is mixed with extract of red cabbage, the solution turns light green. We want to mix a substance Y to X such that a salt is formed. Substance Y will:

Discussion

3724.	Clarified water emerges out from which tank?
Answer» Clarified water emerges out from which tank?

Discussion

3725.	What is the function of vessels?
Answer» What is the function of vessels?

Discussion

3726.	Electrolysis involves oxidation and reduction respectively at [CPMT 1973; AMU 1983; NCERT 1983, 84; MH CET 2001]
Answer» Electrolysis involves oxidation and reduction respectively at [CPMT 1973; AMU 1983; NCERT 1983, 84; MH CET 2001]

3726.

Electrolysis involves oxidation and reduction respectively at [CPMT 1973; AMU 1983; NCERT 1983, 84; MH CET 2001]

Answer»

Electrolysis involves oxidation and reduction respectively at

[CPMT 1973; AMU 1983; NCERT 1983, 84; MH CET 2001]

Discussion

3727.	Which one of the following metals could not be obtained on electrolysis of aqueous solution of its salts [IIT 1990]
Answer» Which one of the following metals could not be obtained on electrolysis of aqueous solution of its salts [IIT 1990]

3727.

Which one of the following metals could not be obtained on electrolysis of aqueous solution of its salts [IIT 1990]

Answer»

Which one of the following metals could not be obtained on electrolysis of aqueous solution of its salts

[IIT 1990]

Discussion

3728.	Substances which occupy space, have mass and can be felt by human senses are called ________.
Answer» Substances which occupy space, have mass and can be felt by human senses are called ________.

Discussion

3729.	Who has made the formulae in science and why?
Answer» Who has made the formulae in science and why?

Discussion

3730.	For reaction: A + B → Products, the rate if the reaction at various concentration are given below: Expt. No.(A)(B)Rate10.20.2220.20.4430.60.436
Answer» For reaction: A + B $\to$ Products, the rate if the reaction at various concentration are given below: $\begin{matrix} E x p t . N o . & (A) & (B) & R a t e 1 & 0.2 & 0.2 & 2 2 & 0.2 & 0.4 & 4 3 & 0.6 & 0.4 & 36 \end{matrix}$

Discussion

3731.	Which of the following substance will give a pale yellow colour when tested with methyl orange indicator?
Answer» Which of the following substance will give a pale yellow colour when tested with methyl orange indicator?

Discussion

3732.	Differentiate between physical and chemical change.
Answer» Differentiate between physical and chemical change.

Discussion

3733.	Changes which only affect the physical form of a substance are known as:
Answer» Changes which only affect the physical form of a substance are known as:

Discussion

3734.	Write a chemical formula for a molecule that contains three Hydrogen atoms (H), one Phosphorus (P), and four Oxygens (O).
Answer» Write a chemical formula for a molecule that contains three Hydrogen atoms (H), one Phosphorus (P), and four Oxygens (O).

Discussion

3735.	Which of the following are domestic waste?
Answer» Which of the following are domestic waste?

Discussion

3736.	What do you mean by corrosion? Name the factors that affect corrosion. [3 MARKS]
Answer» What do you mean by corrosion? Name the factors that affect corrosion. [3 MARKS]

Discussion

3737.	When blue litmus paper is dipped into the water the colour of litmus paper remains same. Similarly, when red litmus paper is dipped into the water the colour remains same. By the above observation we can conclude that:
Answer» When blue litmus paper is dipped into the water the colour of litmus paper remains same. Similarly, when red litmus paper is dipped into the water the colour remains same. By the above observation we can conclude that:

Discussion

3738.	The atomicity of the element oxygen is
Answer» The atomicity of the element oxygen is

Discussion

3739.	Which among the following are the by-products of wastewater treatment?
Answer» Which among the following are the by-products of wastewater treatment?

Discussion

3740.	__ are cut down in order to make the land available for other uses.
Answer» __ are cut down in order to make the land available for other uses.

Discussion

3741.	When we heat iron rod its length increases. Will its height and weight will also increase?
Answer» ^{When we heat iron rod its length increases. Will its height and weight will also increase?}

Discussion

3742.	Why do visual indicators show a change in colour when introduced to an acidic and basic medium?
Answer» Why do visual indicators show a change in colour when introduced to an acidic and basic medium?

Discussion

3743.	What is the difference between hard and rigid objects.
Answer» What is the difference between hard and rigid objects.

Discussion

3744.	What is soil erosion?
Answer» What is soil erosion?

Discussion

3745.	Why top soil is dark in color in comparison to other horizons?
Answer» Why top soil is dark in color in comparison to other horizons?

Discussion

3746.	The acid(s) which is/are used in the manufacture of chemical fertilizers is/are
Answer» The acid(s) which is/are used in the manufacture of chemical fertilizers is/are

Discussion

3747.	Which of the following are neutral oxides?
Answer» Which of the following are neutral oxides?

Discussion

3748.	Ammonia turns red litmus blue. What is its nature?
Answer» Ammonia turns red litmus blue. What is its nature?

Discussion

3749.	You have a bag of cotton and an iron bar, each indicating a mass of 100 kg when measured on a weighing machine. In reality, one is heavier than other. Can you say which one is heavier and why? Define mass. Is it scalar or vector quantity? [3 MARKS]
Answer» You have a bag of cotton and an iron bar, each indicating a mass of 100 kg when measured on a weighing machine. In reality, one is heavier than other. Can you say which one is heavier and why? Define mass. Is it scalar or vector quantity? [3 MARKS]

Discussion

3750.	1. Few children were inflating balloons. 2. Farmers were harvesting crops in their fields. Among the following mentioned observations, which are the examples of reversible change?
Answer» 1. Few children were inflating balloons. 2. Farmers were harvesting crops in their fields. Among the following mentioned observations, which are the examples of reversible change?

Discussion

Explore topic-wise InterviewSolutions in .

What is exothermic and an endothermic reaction? Amongst the following reactions, identify the exothermic reaction and the endothermic reaction: 1. Heating coal in air to form carbon dioxide. 2. Heating limestone in lime kiln to form quick lime. [3 MARKS]

Given that 2Cl−→Cl2+2e−,E∘=−1.36V; H2O→2H++12O2+2e−,E∘=−1.23V. On electrolysing 1M NaCl solution with inert electrodes, which of the following is correct regarding liberation of electrolytic products ?

What is an acid?

What is quantization?

Here is a list of metals and their potentials. Pick the ones which are stronger oxidizing agents than hydrogen electrode. You can pick more than one.

Which following synthetic fibre is made from a natural material?

Which of the following substance(s) pollute water bodies?

The definition for pure substances is that they consist of only one type of atoms or molecules then why is it that water even though it has two elements, i.e. , hydrogen and oxygen is called a pure substance

Rusting is the type of corrosion activity on ___.

A foamy substance is formed by the rapid decomposition of hydrogen peroxide when hydrogen peroxide is mixed with soap solution and catalyst potassium iodide is added. What is this experiment called?

Indicator litmus test on diluted hydrochloric acid, diluted sodium hydroxide, diluted nitric acid can you show the effect of litmus paper, effect on turmeric paper, effect on China rose

How does the Meteorological Department help the nation? [5 MARKS]

If valency of silver is +2 and valency of nitrate is -1,then when they both reacts they form AgNO3​​​​.Explain why? ​​

During rainy season wooden doors are difficult to open or closure because of

Reversible change refers to -

A catalyst is a substance which:

In case of an ant bite which of the following should be applied on the bite to get relief?

What are suspensions?

The given figure shows the rotation and revolution of the earth on its axis and around the sun respectively. What kind of change does the earth undergo?

Define Rust. Name the factors that hasten the rusting of Iron. What measures can be taken to prevent rusting of Iron? [5 MARKS]

Which of these diseases is not caused by improper disposal of sewage?

Soil fertility can be increased by

When a substance X is mixed with extract of red cabbage, the solution turns light green. We want to mix a substance Y to X such that a salt is formed. Substance Y will:

Clarified water emerges out from which tank?

What is the function of vessels?

Electrolysis involves oxidation and reduction respectively at [CPMT 1973; AMU 1983; NCERT 1983, 84; MH CET 2001]

Which one of the following metals could not be obtained on electrolysis of aqueous solution of its salts [IIT 1990]

Substances which occupy space, have mass and can be felt by human senses are called ________.

Who has made the formulae in science and why?

For reaction: A + B → Products, the rate if the reaction at various concentration are given below: Expt. No.(A)(B)Rate10.20.2220.20.4430.60.436

Which of the following substance will give a pale yellow colour when tested with methyl orange indicator?

Differentiate between physical and chemical change.

Changes which only affect the physical form of a substance are known as:

Write a chemical formula for a molecule that contains three Hydrogen atoms (H), one Phosphorus (P), and four Oxygens (O).

Which of the following are domestic waste?

What do you mean by corrosion? Name the factors that affect corrosion. [3 MARKS]

When blue litmus paper is dipped into the water the colour of litmus paper remains same. Similarly, when red litmus paper is dipped into the water the colour remains same. By the above observation we can conclude that:

The atomicity of the element oxygen is

Which among the following are the by-products of wastewater treatment?

__ are cut down in order to make the land available for other uses.

When we heat iron rod its length increases. Will its height and weight will also increase?

Why do visual indicators show a change in colour when introduced to an acidic and basic medium?

What is the difference between hard and rigid objects.

What is soil erosion?

Why top soil is dark in color in comparison to other horizons?

The acid(s) which is/are used in the manufacture of chemical fertilizers is/are

Which of the following are neutral oxides?

Ammonia turns red litmus blue. What is its nature?

You have a bag of cotton and an iron bar, each indicating a mass of 100 kg when measured on a weighing machine. In reality, one is heavier than other. Can you say which one is heavier and why? Define mass. Is it scalar or vector quantity? [3 MARKS]

1. Few children were inflating balloons. 2. Farmers were harvesting crops in their fields. Among the following mentioned observations, which are the examples of reversible change?

If valency of silver is +2 and valency of nitrate is -1,then when they both reacts they form AgNO3.Explain why?