7248 + Interview Questions in Chemistry Page 68 InterviewSolution

3351.	How can we define chemical equations.
Answer» How can we define chemical equations.

Discussion

3352.	What Is the kernel?
Answer» What Is the kernel?

Discussion

3353.	Find the mass of 1.2044×1023 molecules of limewater.
Answer» Find the mass of $1.2044 \times 10^{23}$ molecules of limewater.

Discussion

3354.	A displacement reaction takes place when:
Answer» A displacement reaction takes place when:

Discussion

3355.	The conditions required for peat formation are
Answer» The conditions required for peat formation are

Discussion

3356.	Give two examples each of, biodegradable and non-biodegradable material.
Answer» Give two examples each of, biodegradable and non-biodegradable material.

Discussion

3357.	how to find the equivalent mass of redox reaction?
Answer» how to find the equivalent mass of redox reaction?

Discussion

3358.	An oxide of nitrogen contains 36.8% nitrogen and 63.2% oxygen by mass. Calculate its empirical formula. Options: N2O , NO , N2O3 , NO2
Answer» An oxide of nitrogen contains 36.8% nitrogen and 63.2% oxygen by mass. Calculate its empirical formula. Options: N2O , NO , N2O3 , NO2

Discussion

3359.	What is caustic soda? Where is it used?
Answer» What is caustic soda? Where is it used?

Discussion

3360.	What would happen if you cool a saturated solution?
Answer» What would happen if you cool a saturated solution?

Discussion

3361.	Question 8Which of the following represents the correct match for items in Column A with those in Column B.Column AColumn BI. Nylon(i) ThermoplasticII. PVC(ii) Thermosetting plasticIII. Bakelite(iii) Fibre(a) I-(ii), II-(iii), III-(i)(b) I-(iii), II-(i), III-(ii)(c) I-(ii), II-(i), III-(iii)(d) I-(iii), II-(ii), III-(i)
Answer» Question 8 Which of the following represents the correct match for items in Column A with those in Column B. $\begin{matrix} Column A & Column B I. Nylon & (i) Thermoplastic II. PVC & (ii) Thermosetting plastic III. Bakelite & (iii) Fibre \end{matrix}$ (a) I-(ii), II-(iii), III-(i) (b) I-(iii), II-(i), III-(ii) (c) I-(ii), II-(i), III-(iii) (d) I-(iii), II-(ii), III-(i)

Discussion

3362.	A mixture of iodine and sand can be separated by the process of ___.
Answer» A mixture of iodine and sand can be separated by the process of ___.

Discussion

3363.	If Pc, Vc and Tc are critical pressure, critical volume and critical temperature, then compressibility factor at critical condition is (1) 0.375(3) 1.275(2) 2.66(4) 1
Answer» If Pc, Vc and Tc are critical pressure, critical volume and critical temperature, then compressibility factor at critical condition is (1) 0.375(3) 1.275(2) 2.66(4) 1

Discussion

3364.	Chemical formula of Water-gas is:
Answer» Chemical formula of Water-gas is:

Discussion

3365.	Mention some applications of petrol in our day to day life.
Answer» Mention some applications of petrol in our day to day life.

Discussion

3366.	Let ,x^{x^{x^{x^{x^{x^{x^{x^{.^{.^{.^{.^.}}}}}}}}}}}=2 -(1) then, x^2=2 ⇒ x=\pm\sqrt2 -(2) Now let, y^{y^{y^{y^{y^{.^{.^{.^.}}}}}}}=4 -(3) then, y^4=4 ⇒ y=\pm\sqrt2 -(4) From (2)&(4), x=y Now L.H.S. of(1)&(2) are eqyal. Therefore,2=4
Answer» Let ,x^{x^{x^{x^{x^{x^{x^{x^{.^{.^{.^{.^.}}}}}}}}}}}=2 -(1) then, x^2=2 ⇒ x=\pm\sqrt2 -(2) Now let, y^{y^{y^{y^{y^{.^{.^{.^.}}}}}}}=4 -(3) then, y^4=4 ⇒ y=\pm\sqrt2 -(4) From (2)&(4), x=y Now L.H.S. of(1)&(2) are eqyal. Therefore,2=4

Discussion

3367.	28. When HCOOH acid is heated with concentrated sulphuric acid the gas evolved is 1) only CO2 2)CO+CO2 3)SO2+CO2 4)CO
Answer» 28. When HCOOH acid is heated with concentrated sulphuric acid the gas evolved is 1) only CO2 2)CO+CO2 3)SO2+CO2 4)CO

Discussion

3368.	Question 21 Some natural resources are given below. Classify them into the exhaustible and inexhaustible natural resources. Air, sunlight, oxygen, coal, natural gas, petroleum, minerals, forests.
Answer» Question 21 Some natural resources are given below. Classify them into the exhaustible and inexhaustible natural resources. Air, sunlight, oxygen, coal, natural gas, petroleum, minerals, forests.

Discussion

3369.	1 litre of carbon dioxide is passed through red hot coke .The volume becomes 1.4 litres at same temperature and pressure.the composition of products is
Answer» 1 litre of carbon dioxide is passed through red hot coke .The volume becomes 1.4 litres at same temperature and pressure.the composition of products is

Discussion

3370.	what is line of sight?
Answer» what is line of sight?

Discussion

3371.	The solutions which show a pH in the range 7 to 14 are _________ in nature.
Answer» The solutions which show a pH in the range 7 to 14 are _________ in nature.

Discussion

3372.	Assertion:- Plastics are not environment-friendly still, they are used. Choose the correct reason(s) for this assertion.
Answer» Assertion:- Plastics are not environment-friendly still, they are used. Choose the correct reason(s) for this assertion.

Discussion

3373.	The correct order for fuels mentioned below in terms of increasing calorific value will be - CNG, Petrol, Cow Dung Cake and Wood.
Answer» The correct order for fuels mentioned below in terms of increasing calorific value will be - CNG, Petrol, Cow Dung Cake and Wood.

Discussion

3374.	Describe how crystals of copper sulphate are prepared.
Answer» Describe how crystals of copper sulphate are prepared.

Discussion

3375.	___ is required for a match stick to catch fire.
Answer» ___ is required for a match stick to catch fire.

Discussion

3376.	Define allotropy. Write the different allotropic forms of carbon.
Answer» Define allotropy. Write the different allotropic forms of carbon.

Discussion

3377.	Which coal is used for purifying water?
Answer» Which coal is used for purifying water?

Discussion

3378.	Metals and non - metals exist in which form?
Answer» Metals and non - metals exist in which form?

Discussion

3379.	What is haber's process
Answer» What is haber's process

Discussion

3380.	what is organic and inorganic solvents
Answer» what is organic and inorganic solvents

Discussion

3381.	Can you Store pickle in an aluminum utensils? Explain ?
Answer» Can you Store pickle in an aluminum utensils? Explain ?

Discussion

3382.	experiment done by henry mosely to coclude atomic number is more fundamental than atomic mass
Answer» experiment done by henry mosely to coclude atomic number is more fundamental than atomic mass

Discussion

3383.	The nature of the reaction of combining moist hydrogen gas with chlorine in direct sunlight is
Answer» The nature of the reaction of combining moist hydrogen gas with chlorine in direct sunlight is

Discussion

3384.	Question 19Why are bells made of metals?
Answer» Question 19 Why are bells made of metals?

Discussion

3385.	Explain endothermic reactions by giving day-to-day examples? Is combustion of wood also an endothermic process?
Answer» Explain endothermic reactions by giving day-to-day examples? Is combustion of wood also an endothermic process?

Discussion

3386.	Is I've cream a solid or a liquid
Answer» Is I've cream a solid or a liquid

Discussion

3387.	Fractures in oil reservoirs ___
Answer» Fractures in oil reservoirs ___

Discussion

3388.	When few pieces of iron are dropped into a blue coloured copper sulphate solution, the blue colour fades and eventually turns into light green due to the formation of:
Answer» When few pieces of iron are dropped into a blue coloured copper sulphate solution, the blue colour fades and eventually turns into light green due to the formation of:

Discussion

3389.	The middle region has limited supply of oxygen and partial burning takes place there. Due to this,
Answer» The middle region has limited supply of oxygen and partial burning takes place there. Due to this,

Discussion

3390.	2304000 in which significance number?
Answer» 2304000 in which significance number?

Discussion

3391.	Identify the following part of the plant by its uses.
Answer» Identify the following part of the plant by its uses.

Discussion

3392.	Water is considered as a compound because:
Answer» Water is considered as a compound because:

Discussion

3393.	What role does centrifugal force play in drying clothes in the washing machine?
Answer» What role does centrifugal force play in drying clothes in the washing machine?

Discussion

3394.	Is there any other state of matter apart from solid, liquid, and gases?
Answer» Is there any other state of matter apart from solid, liquid, and gases?

Discussion

3395.	which is reactive & non reactive gases?
Answer» which is reactive & non reactive gases?

Discussion

3396.	Question 38A silver article generally turns black when kept in the open for a few days. The article when rubbed with toothpaste again starts shining.(a) Why do silver articles turn black when kept in the open for a few days? Name the phenomenon involved.(b) Name the black substance formed and give its chemical formula.
Answer» Question 38 A silver article generally turns black when kept in the open for a few days. The article when rubbed with toothpaste again starts shining. (a) Why do silver articles turn black when kept in the open for a few days? Name the phenomenon involved. (b) Name the black substance formed and give its chemical formula.

3396.

Question 38A silver article generally turns black when kept in the open for a few days. The article when rubbed with toothpaste again starts shining.(a) Why do silver articles turn black when kept in the open for a few days? Name the phenomenon involved.(b) Name the black substance formed and give its chemical formula.

Answer»

Question 38

A silver article generally turns black when kept in the open for a few days. The article when rubbed with toothpaste again starts shining.

(a) Why do silver articles turn black when kept in the open for a few days? Name the phenomenon involved.

(b) Name the black substance formed and give its chemical formula.

Discussion

3397.	Which among the following is used to purify gold?
Answer» Which among the following is used to purify gold?

Discussion

3398.	some characteristic feature of pi bonds
Answer» some characteristic feature of pi bonds

Discussion

3399.	What is the function of the neutrons in the nucleus?
Answer» What is the function of the neutrons in the nucleus?

Discussion

3400.	Copper is a metal as:
Answer» Copper is a metal as:

Discussion

Explore topic-wise InterviewSolutions in .

How can we define chemical equations.

What Is the kernel?

Find the mass of 1.2044×1023 molecules of limewater.

A displacement reaction takes place when:

The conditions required for peat formation are

Give two examples each of, biodegradable and non-biodegradable material.

how to find the equivalent mass of redox reaction?

An oxide of nitrogen contains 36.8% nitrogen and 63.2% oxygen by mass. Calculate its empirical formula. Options: N2O , NO , N2O3 , NO2

What is caustic soda? Where is it used?

What would happen if you cool a saturated solution?

A mixture of iodine and sand can be separated by the process of ___.

If Pc, Vc and Tc are critical pressure, critical volume and critical temperature, then compressibility factor at critical condition is (1) 0.375(3) 1.275(2) 2.66(4) 1

Chemical formula of Water-gas is:

Mention some applications of petrol in our day to day life.

Let ,x^{x^{x^{x^{x^{x^{x^{x^{.^{.^{.^{.^.}}}}}}}}}}}=2 -(1) then, x^2=2 ⇒ x=\pm\sqrt2 -(2) Now let, y^{y^{y^{y^{y^{.^{.^{.^.}}}}}}}=4 -(3) then, y^4=4 ⇒ y=\pm\sqrt2 -(4) From (2)&(4), x=y Now L.H.S. of(1)&(2) are eqyal. Therefore,2=4

28. When HCOOH acid is heated with concentrated sulphuric acid the gas evolved is 1) only CO2 2)CO+CO2 3)SO2+CO2 4)CO

Question 21 Some natural resources are given below. Classify them into the exhaustible and inexhaustible natural resources. Air, sunlight, oxygen, coal, natural gas, petroleum, minerals, forests.

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

what is line of sight?

The solutions which show a pH in the range 7 to 14 are _________ in nature.

Assertion:- Plastics are not environment-friendly still, they are used. Choose the correct reason(s) for this assertion.

The correct order for fuels mentioned below in terms of increasing calorific value will be - CNG, Petrol, Cow Dung Cake and Wood.

Describe how crystals of copper sulphate are prepared.

___ is required for a match stick to catch fire.

Define allotropy. Write the different allotropic forms of carbon.

Which coal is used for purifying water?

Metals and non - metals exist in which form?

What is haber's process

what is organic and inorganic solvents

Can you Store pickle in an aluminum utensils? Explain ?

experiment done by henry mosely to coclude atomic number is more fundamental than atomic mass

The nature of the reaction of combining moist hydrogen gas with chlorine in direct sunlight is

Question 19Why are bells made of metals?

Explain endothermic reactions by giving day-to-day examples? Is combustion of wood also an endothermic process?

Is I've cream a solid or a liquid

Fractures in oil reservoirs ___

When few pieces of iron are dropped into a blue coloured copper sulphate solution, the blue colour fades and eventually turns into light green due to the formation of:

The middle region has limited supply of oxygen and partial burning takes place there. Due to this,

2304000 in which significance number?

Identify the following part of the plant by its uses.

Water is considered as a compound because:

What role does centrifugal force play in drying clothes in the washing machine?

Is there any other state of matter apart from solid, liquid, and gases?

which is reactive & non reactive gases?

Which among the following is used to purify gold?

some characteristic feature of pi bonds

What is the function of the neutrons in the nucleus?

Copper is a metal as: