7248 + Interview Questions in Chemistry Page 123 InterviewSolution

6101.	what do you mean by alkali?
Answer» what do you mean by alkali?

Discussion

6102.	Explain the process of melting on the basis of kinetic theory???
Answer» Explain the process of melting on the basis of kinetic theory???

Discussion

6103.	Why CNG called a clean fuel
Answer» Why CNG called a clean fuel

Discussion

6104.	Which of the following fuels has the lowest calorific value ? (a) kerosene (b) CNG (c) biogas (d) LPG
Answer» Which of the following fuels has the lowest calorific value ? (a) kerosene (b) CNG (c) biogas (d) LPG

6104.

Which of the following fuels has the lowest calorific value ? (a) kerosene (b) CNG (c) biogas (d) LPG

Answer»

Which of the following fuels has the lowest calorific value ?

(a) kerosene

(b) CNG

(c) biogas

(d) LPG

Discussion

6105.	Which particles are lighter and free to move about?
Answer» Which particles are lighter and free to move about?

Discussion

6106.	What property of metals like gold and platinum makes it so least reactive that they don't even react with hydrochloric acid?
Answer» What property of metals like gold and platinum makes it so least reactive that they don't even react with hydrochloric acid?

Discussion

6107.	Which of the following energy source is exhaustible?
Answer» Which of the following energy source is exhaustible?

Discussion

6108.	Aluminium foil is used for packing food items like biscuits, chocolates etc because:
Answer» Aluminium foil is used for packing food items like biscuits, chocolates etc because:

6108.

Aluminium foil is used for packing food items like biscuits, chocolates etc because:

Answer»

Aluminium foil is used for packing food items like biscuits, chocolates etc because:

Discussion

6109.	In 1 L saturated solution of AgCl [Ksp=1.6×10−10], 0.01 mole of CuCl [Ksp=1×10−6] is added. The resultant concentration of Ag+ in the solution is 1.6×10−x M. The value of x is :
Answer» In $1 L$ saturated solution of $A g C l [K_{s p} = 1.6 \times 10^{- 10}]$ , $0.01 m o l e o f C u C l [K_{s p} = 1 \times 10^{- 6}]$ is added. The resultant concentration of $A g^{+}$ in the solution is $1.6 \times 10^{- x} M$ . The value of $x$ is :

Discussion

6110.	Find the amount of residue obtained in grams when 2.76 g of silver carbonate is strongly heated. (Molar mass of Ag=108 g/mol) Ag2CO3Δ−→2Ag+CO2+12O2
Answer» Find the amount of residue obtained in grams when $2.76 g$ of silver carbonate is strongly heated. (Molar mass of $A g = 108 g/mol$ ) $A g_{2} C O_{3} Δ - \to 2 A g + C O_{2} + \frac{1}{2} O_{2}$

Discussion

6111.	List the factors on which kinetic energy depends on. [2 MARKS]
Answer» List the factors on which kinetic energy depends on. [2 MARKS]

Discussion

6112.	The value of x, y and z in the following equation are: xH2+yO2→zH2O
Answer» The value of x, y and z in the following equation are: $x H_{2} + y O_{2} \to z H_{2} O$

6112.

The value of x, y and z in the following equation are: xH2+yO2→zH2O

Answer»

The value of x, y and z in the following equation are:

$x H_{2} + y O_{2} \to z H_{2} O$

Discussion

6113.	The valency of carbon is___
Answer» The valency of carbon is___

Discussion

6114.	Which of the following chemicals is not present in neem oil?
Answer» Which of the following chemicals is not present in neem oil?

Discussion

6115.	1. Which group of elements is stored in oil due to their reactive nature with water and air? 2. Waht is deterioration of a metal by chemical or electrochemical reaction with its environment called?
Answer» 1. Which group of elements is stored in oil due to their reactive nature with water and air? 2. Waht is deterioration of a metal by chemical or electrochemical reaction with its environment called?

6115.

1. Which group of elements is stored in oil due to their reactive nature with water and air? 2. Waht is deterioration of a metal by chemical or electrochemical reaction with its environment called?

Answer»

1. Which group of elements is stored in oil due to their reactive nature with water and air?

2. Waht is deterioration of a metal by chemical or electrochemical reaction with its environment called?

Discussion

6116.	Which of the following fossil fuel can be prepared in laboratory?
Answer» Which of the following fossil fuel can be prepared in laboratory?

Discussion

6117.	Does fire have any mass?
Answer» Does fire have any mass?

Discussion

6118.	Five 100ml beakers were taken and labelled a, b, c, d,and e about 50 ml of water was taken in each of the beaker and following substances were added to each of them, left undisturbed for sometime and observations where recorded: Beaker A :CuSo4+Zn Beaker B :CuSo4+Fe Beaker C :ZnSo4+Cu Beaker D :FeSo4+Cu Beaker E :ZnSo4+Fe Write also the relevant chemical equation. Also write the observation
Answer» Five 100ml beakers were taken and labelled a, b, c, d,and e about 50 ml of water was taken in each of the beaker and following substances were added to each of them, left undisturbed for sometime and observations where recorded: Beaker A :CuSo4+Zn Beaker B :CuSo4+Fe Beaker C :ZnSo4+Cu Beaker D :FeSo4+Cu Beaker E :ZnSo4+Fe Write also the relevant chemical equation. Also write the observation

6118.

Five 100ml beakers were taken and labelled a, b, c, d,and e about 50 ml of water was taken in each of the beaker and following substances were added to each of them, left undisturbed for sometime and observations where recorded: Beaker A :CuSo4+Zn Beaker B :CuSo4+Fe Beaker C :ZnSo4+Cu Beaker D :FeSo4+Cu Beaker E :ZnSo4+Fe Write also the relevant chemical equation. Also write the observation

Answer»

Five 100ml beakers were taken and labelled a, b, c, d,and e about 50 ml of water was taken in each of the beaker and following substances were added to each of them, left undisturbed for sometime and observations where recorded:

Beaker A :CuSo4+Zn

Beaker B :CuSo4+Fe

Beaker C :ZnSo4+Cu

Beaker D :FeSo4+Cu

Beaker E :ZnSo4+Fe

Write also the relevant chemical equation.

Also write the observation

Discussion

6119.	What is malleable
Answer» What is malleable

Discussion

6120.	When we fold paper and press it and form a line and then tear it then it tears following the line?
Answer» When we fold paper and press it and form a line and then tear it then it tears following the line?

Discussion

6121.	Match the following mixtures to their correct types. Mixture Types(a) Air(1) Homogeneous(b) Water and mustard oil (c) Chocolate chip cookies(2) Heterogeneous(d) Ornamental gold
Answer» Match the following mixtures to their correct types. $\begin{matrix} Mixture & Types (a) Air & (1) Homogeneous (b) Water and mustard oil (c) Chocolate chip cookies & (2) Heterogeneous (d) Ornamental gold \end{matrix}$

Discussion

6122.	Carbon and iron form an alloy called steel. What is the function of carbon in this alloy?
Answer» Carbon and iron form an alloy called steel. What is the function of carbon in this alloy?

Discussion

6123.	Which of the following is true for water?
Answer» Which of the following is true for water?

Discussion

6124.	Aditya remembered that Sodium shouldn’t be stored in water and so used ethanol to store sodium. He observed sodium disappearing to give a yellow powder. What is the yellow powder?
Answer» Aditya remembered that Sodium shouldn’t be stored in water and so used ethanol to store sodium. He observed sodium disappearing to give a yellow powder. What is the yellow powder?

Discussion

6125.	Complete the following reaction. Fe(s) +H2O(steam) ⇌ H2(g) + .
Answer» Complete the following reaction. $Fe (s) + H_{2} O (steam) ⇌ H_{2} (g) +$ .

Discussion

6126.	Which of the following are the examples of a chemical reaction? i. Burning of wood ii. Cutting of wood iii. Conversion of steam to water iv. Rusting of almirah
Answer» Which of the following are the examples of a chemical reaction? i. Burning of wood ii. Cutting of wood iii. Conversion of steam to water iv. Rusting of almirah

6126.

Which of the following are the examples of a chemical reaction? i. Burning of wood ii. Cutting of wood iii. Conversion of steam to water iv. Rusting of almirah

Answer»

Which of the following are the examples of a chemical reaction?

i. Burning of wood

ii. Cutting of wood

iii. Conversion of steam to water

iv. Rusting of almirah

Discussion

6127.	Name any two ores of iron. [2 MARKS]
Answer» Name any two ores of iron. [2 MARKS]

Discussion

6128.	In order to attain octet configuration, the atoms share, lose or gain electrons, then its atomic mass
Answer» In order to attain octet configuration, the atoms share, lose or gain electrons, then its atomic mass

Discussion

6129.	Find out information about bio plastic?
Answer» Find out information about bio plastic?

Discussion

6130.	what will happen if an inflated balloon is brought near a lighted bulb? Why? Is it a physical change or a chemical change?
Answer» what will happen if an inflated balloon is brought near a lighted bulb? Why? Is it a physical change or a chemical change?

Discussion

6131.	Explain how digestion is an exothermic reaction. [3 MARKS]
Answer» Explain how digestion is an exothermic reaction. [3 MARKS]

Discussion

6132.	Which of the following is a decomposition reaction?
Answer» Which of the following is a decomposition reaction?

Discussion

6133.	Five 100ml beakers were taken and labelled a, b, c, d,and e about 50 ml of water was taken in each of the beaker and following substances were added to each of them, left undisturbed for sometime and observations where recorded: Beaker A :CuSo4+Zn Beaker B :CuSo4+Fe Beaker C :ZnSo4+Cu Beaker D :FeSo4+Cu Beaker E :ZnSo4+Fe Write also the relevant chemical equation.
Answer» Five 100ml beakers were taken and labelled a, b, c, d,and e about 50 ml of water was taken in each of the beaker and following substances were added to each of them, left undisturbed for sometime and observations where recorded: Beaker A :CuSo4+Zn Beaker B :CuSo4+Fe Beaker C :ZnSo4+Cu Beaker D :FeSo4+Cu Beaker E :ZnSo4+Fe Write also the relevant chemical equation.

6133.

Five 100ml beakers were taken and labelled a, b, c, d,and e about 50 ml of water was taken in each of the beaker and following substances were added to each of them, left undisturbed for sometime and observations where recorded: Beaker A :CuSo4+Zn Beaker B :CuSo4+Fe Beaker C :ZnSo4+Cu Beaker D :FeSo4+Cu Beaker E :ZnSo4+Fe Write also the relevant chemical equation.

Answer»

Five 100ml beakers were taken and labelled a, b, c, d,and e about 50 ml of water was taken in each of the beaker and following substances were added to each of them, left undisturbed for sometime and observations where recorded:

Beaker A :CuSo4+Zn

Beaker B :CuSo4+Fe

Beaker C :ZnSo4+Cu

Beaker D :FeSo4+Cu

Beaker E :ZnSo4+Fe

Write also the relevant chemical equation.

Discussion

6134.	what type of gase is relesed in yagna (burning wood pieces with dry cow dung and ghee)?
Answer» what type of gase is relesed in yagna (burning wood pieces with dry cow dung and ghee)?

Discussion

6135.	Consider the following H2O2 solutions and choose the correct arrangement in the increasing order of normality. A) 100 ml of 10 volumes H2O2 solution B) 100 ml of 6% (w/v) H2O2 solution C) 100 ml of solution containing 3.4 g of pure H2O2
Answer» Consider the following $H_{2}$ $O_{2}$ solutions and choose the correct arrangement in the increasing order of normality. A) 100 ml of 10 volumes $H_{2}$ $O_{2}$ solution B) 100 ml of 6% (w/v) $H_{2}$ $O_{2}$ solution C) 100 ml of solution containing 3.4 g of pure $H_{2}$ $O_{2}$

6135.

Consider the following H2O2 solutions and choose the correct arrangement in the increasing order of normality. A) 100 ml of 10 volumes H2O2 solution B) 100 ml of 6% (w/v) H2O2 solution C) 100 ml of solution containing 3.4 g of pure H2O2

Answer»

Consider the following $H_{2}$ $O_{2}$ solutions and choose the correct arrangement in the increasing order of normality.

A) 100 ml of 10 volumes $H_{2}$ $O_{2}$ solution

B) 100 ml of 6% (w/v) $H_{2}$ $O_{2}$ solution

C) 100 ml of solution containing 3.4 g of pure $H_{2}$ $O_{2}$

Discussion

6136.	The most commonly used chemical method for purifying water is
Answer» The most commonly used chemical method for purifying water is

Discussion

6137.	By which process, coal is formed?
Answer» By which process, coal is formed?

Discussion

6138.	If the sun is the ultimate source of energy, then how can the energy in fossil fuels be said to have come from sun?
Answer» If the sun is the ultimate source of energy, then how can the energy in fossil fuels be said to have come from sun?

Discussion

6139.	What is the mass of sulphur in combination with 5 g of iron in ferrous sulphide (FeS).
Answer» What is the mass of sulphur in combination with 5 g of iron in ferrous sulphide $(F e S)$ .

Discussion

6140.	Which of the following can be classified as fossil fuels?
Answer» Which of the following can be classified as fossil fuels?

Discussion

6141.	Which one of the following pollutants is suspended solids of smoke, dust and vapour?
Answer» Which one of the following pollutants is suspended solids of smoke, dust and vapour?

Discussion

6142.	Which of the following is not a property of a polymer?
Answer» Which of the following is not a property of a polymer?

Discussion

6143.	The valency of calcium in calcium hydroxide is ___ .
Answer» The valency of calcium in calcium hydroxide is ___ .

Discussion

6144.	Arun is traveling with his friends in a car. The car suddenly stops due to some problem in the engine. If Arun and his friends apply a force of 1000 N to drag the car to the nearest garage that is 1.2 km from that place, determine the total power required if the dragging time is 20 minutes.
Answer» Arun is traveling with his friends in a car. The car suddenly stops due to some problem in the engine. If Arun and his friends apply a force of 1000 N to drag the car to the nearest garage that is 1.2 km from that place, determine the total power required if the dragging time is 20 minutes.

Discussion

6145.	Rashi was performing an experiment. She mixed a compound X with water in a beaker. She found that the beaker was becoming hot, releasing heat and forming a new substance Y. She was shocked and left the room leaving the product. After three-four days when she returned, she found that the substance Y had changed into a shiny substance Z. What are X, Y and Z.
Answer» Rashi was performing an experiment. She mixed a compound X with water in a beaker. She found that the beaker was becoming hot, releasing heat and forming a new substance Y. She was shocked and left the room leaving the product. After three-four days when she returned, she found that the substance Y had changed into a shiny substance Z. What are X, Y and Z.

Discussion

6146.	Which one of the following set has two non-metals having shiny and lustrous surface?
Answer» Which one of the following set has two non-metals having shiny and lustrous surface?

Discussion

6147.	A water is said to be hard if:
Answer» A water is said to be hard if:

Discussion

6148.	How are excavated dams made ? [3 MARKS]
Answer» How are excavated dams made ? [3 MARKS]

Discussion

6149.	One day Reeta went to a jeweller's shop with her mother.Her mother gave an old gold jewellery to goldsmith to polish.Next day when they brought the jewellery back,they found that there was a slight loss in its weight.Can you suggest a reason for the loss in weight ?
Answer» One day Reeta went to a jeweller's shop with her mother.Her mother gave an old gold jewellery to goldsmith to polish.Next day when they brought the jewellery back,they found that there was a slight loss in its weight.Can you suggest a reason for the loss in weight ?

Discussion

6150.	Our atmosphere acts as a green house. Explain.
Answer» Our atmosphere acts as a green house. Explain.

Discussion

Explore topic-wise InterviewSolutions in .

what do you mean by alkali?

Explain the process of melting on the basis of kinetic theory???

Why CNG called a clean fuel

Which of the following fuels has the lowest calorific value ? (a) kerosene (b) CNG (c) biogas (d) LPG

Which particles are lighter and free to move about?

What property of metals like gold and platinum makes it so least reactive that they don't even react with hydrochloric acid?

Which of the following energy source is exhaustible?

Aluminium foil is used for packing food items like biscuits, chocolates etc because:

In 1 L saturated solution of AgCl [Ksp=1.6×10−10], 0.01 mole of CuCl [Ksp=1×10−6] is added. The resultant concentration of Ag+ in the solution is 1.6×10−x M. The value of x is :

Find the amount of residue obtained in grams when 2.76 g of silver carbonate is strongly heated. (Molar mass of Ag=108 g/mol) Ag2CO3Δ−→2Ag+CO2+12O2

List the factors on which kinetic energy depends on. [2 MARKS]

The value of x, y and z in the following equation are: xH2+yO2→zH2O

The valency of carbon is___

Which of the following chemicals is not present in neem oil?

1. Which group of elements is stored in oil due to their reactive nature with water and air? 2. Waht is deterioration of a metal by chemical or electrochemical reaction with its environment called?

Which of the following fossil fuel can be prepared in laboratory?

Does fire have any mass?

What is malleable

When we fold paper and press it and form a line and then tear it then it tears following the line?

Match the following mixtures to their correct types. Mixture Types(a) Air(1) Homogeneous(b) Water and mustard oil (c) Chocolate chip cookies(2) Heterogeneous(d) Ornamental gold

Carbon and iron form an alloy called steel. What is the function of carbon in this alloy?

Which of the following is true for water?

Aditya remembered that Sodium shouldn’t be stored in water and so used ethanol to store sodium. He observed sodium disappearing to give a yellow powder. What is the yellow powder?

Complete the following reaction. Fe(s) +H2O(steam) ⇌ H2(g) + .

Which of the following are the examples of a chemical reaction? i. Burning of wood ii. Cutting of wood iii. Conversion of steam to water iv. Rusting of almirah

Name any two ores of iron. [2 MARKS]

In order to attain octet configuration, the atoms share, lose or gain electrons, then its atomic mass

Find out information about bio plastic?

what will happen if an inflated balloon is brought near a lighted bulb? Why? Is it a physical change or a chemical change?

Explain how digestion is an exothermic reaction. [3 MARKS]

Which of the following is a decomposition reaction?

what type of gase is relesed in yagna (burning wood pieces with dry cow dung and ghee)?

Consider the following H2O2 solutions and choose the correct arrangement in the increasing order of normality. A) 100 ml of 10 volumes H2O2 solution B) 100 ml of 6% (w/v) H2O2 solution C) 100 ml of solution containing 3.4 g of pure H2O2

The most commonly used chemical method for purifying water is

By which process, coal is formed?

If the sun is the ultimate source of energy, then how can the energy in fossil fuels be said to have come from sun?

What is the mass of sulphur in combination with 5 g of iron in ferrous sulphide (FeS).

Which of the following can be classified as fossil fuels?

Which one of the following pollutants is suspended solids of smoke, dust and vapour?

Which of the following is not a property of a polymer?

The valency of calcium in calcium hydroxide is ___ .

Arun is traveling with his friends in a car. The car suddenly stops due to some problem in the engine. If Arun and his friends apply a force of 1000 N to drag the car to the nearest garage that is 1.2 km from that place, determine the total power required if the dragging time is 20 minutes.

Which one of the following set has two non-metals having shiny and lustrous surface?

A water is said to be hard if:

How are excavated dams made ? [3 MARKS]

One day Reeta went to a jeweller's shop with her mother.Her mother gave an old gold jewellery to goldsmith to polish.Next day when they brought the jewellery back,they found that there was a slight loss in its weight.Can you suggest a reason for the loss in weight ?

Our atmosphere acts as a green house. Explain.