7248 + Interview Questions in Chemistry Page 105 InterviewSolution

5201.	When MgO is dissolved in water, Mg(OH)2 is obtained. The solution thus obtained is ___ in nature.
Answer» When MgO is dissolved in water, $M g {(O H)}_{2}$ is obtained. The solution thus obtained is ___ in nature.

Discussion

5202.	Which process is similar to that of a burning candle except for the difference in temperature?
Answer» Which process is similar to that of a burning candle except for the difference in temperature?

Discussion

5203.	Arun is travelling with his friends in a car. The car suddenly stops due to some problem in the engine. Arun and his friends apply a force of 1000 N to drag the car to the nearest garage with a displacement of 1.2 km from that place. Determine the total power applied by them, if they dragged it to the nearest garage in 20 minutes.
Answer» Arun is travelling with his friends in a car. The car suddenly stops due to some problem in the engine. Arun and his friends apply a force of $1000 N$ to drag the car to the nearest garage with a displacement of $1.2 k m$ from that place. Determine the total power applied by them, if they dragged it to the nearest garage in $20$ minutes.

Discussion

5204.	Whenever we write a chemical equation always we write all the gases in the molecular form . Why don't we do the same with the metals ?
Answer» Whenever we write a chemical equation always we write all the gases in the molecular form . Why don't we do the same with the metals ?

Discussion

5205.	A noble metal is one which is inert and does not react with acids like HCl,HNO3,H2SO4. Select an option with a set of two noble metals.
Answer» A noble metal is one which is inert and does not react with acids like $H C l, H N O_{3}, H_{2} S O_{4}$ . Select an option with a set of two noble metals.

Discussion

5206.	Student A keeps vessel in yellow zone while student B keeps vessel in blue zone of flame. Which statement will be correct accordingly?
Answer» Student A keeps vessel in yellow zone while student B keeps vessel in blue zone of flame. Which statement will be correct accordingly?

Discussion

5207.	How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal? [2 MARKS]
Answer» How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal? [2 MARKS]

Discussion

5208.	What will be the physical state of matter at:- (a) 0∘ (b) 100∘
Answer» What will be the physical state of matter at:- (a) $0^{\circ}$ (b) $100^{\circ}$

Discussion

5209.	Explain evaporation on the basis of molecular motion?
Answer» Explain evaporation on the basis of molecular motion?

Discussion

5210.	Avogadro number represents the number of atoms in ___.
Answer» Avogadro number represents the number of atoms in ___.

Discussion

5211.	What is the difference between element and molecules
Answer» What is the difference between element and molecules

Discussion

5212.	Which of the following gas is not a green house gas?
Answer» Which of the following gas is not a green house gas?

Discussion

5213.	With respect to diamond and graphite, which of the statement(s) given below is/are correct?
Answer» With respect to diamond and graphite, which of the statement(s) given below is/are correct?

Discussion

5214.	Which plastic is hard, highly polished and used for making floor tiles and kitchenware ?
Answer» Which plastic is hard, highly polished and used for making floor tiles and kitchenware ?

Discussion

5215.	Choose the synonym of the word. Exquisite
Answer» Choose the synonym of the word. Exquisite

5215.

Choose the synonym of the word. Exquisite

Answer»

Choose the synonym of the word.

Exquisite

Discussion

5216.	What is the spelling of JJThomson
Answer» What is the spelling of JJThomson

Discussion

5217.	Na + O → Y Y + H2O → Z The commercial name of Z is _________.
Answer» $N a$ + $O$ $\to$ $Y$ $Y$ + $H_{2} O$ $\to$ $Z$ The commercial name of Z is _________.

5217.

Na + O → Y Y + H2O → Z The commercial name of Z is _________.

Answer»

$N a$ + $O$ $\to$ $Y$

$Y$ + $H_{2} O$ $\to$ $Z$

The commercial name of Z is _________.

Discussion

5218.	Shweta always cleans her utensils properly yet she observes a black layer at the bottom of the utensil. Why is it so?
Answer» Shweta always cleans her utensils properly yet she observes a black layer at the bottom of the utensil. Why is it so?

5218.

Shweta always cleans her utensils properly yet she observes a black layer at the bottom of the utensil. Why is it so?

Answer»

Shweta always cleans her utensils properly yet she observes a black layer at the bottom of the utensil. Why is it so?

Discussion

5219.	Is there a vaccum between air and water molecules?
Answer» Is there a vaccum between air and water molecules?

Discussion

5220.	Question 2 Which one of the following has the highest calorific value? (a) Kerosene (b) LPG (c) Biogas (d) Petrol
Answer» Question 2 Which one of the following has the highest calorific value? (a) Kerosene (b) LPG (c) Biogas (d) Petrol

Discussion

5221.	Let 3^a=4,4^b=5,5^c=6,6^d=7,7^e=8 and 8^f=9. The value of product (abcdef) is
Answer» Let 3^a=4,4^b=5,5^c=6,6^d=7,7^e=8 and 8^f=9. The value of product (abcdef) is

Discussion

5222.	Plastics are not good for the environment. Still, they are used widely because:
Answer» Plastics are not good for the environment. Still, they are used widely because:

Discussion

5223.	Which among these samples are not a suspension?
Answer» Which among these samples are not a suspension?

Discussion

5224.	Which of the following are not used in washing clothes?
Answer» Which of the following are not used in washing clothes?

Discussion

5225.	State whether the following statements are true or false : (a) Coke is almost pure form of carbon. (b) Coal tar is a mixture of various substances. (c) Kerosene is not a fassil fuel. (d) CNG is more polluting than petrol. (e) Fossil fuels can be made in the laboratory.
Answer» State whether the following statements are true or false : (a) Coke is almost pure form of carbon. (b) Coal tar is a mixture of various substances. (c) Kerosene is not a fassil fuel. (d) CNG is more polluting than petrol. (e) Fossil fuels can be made in the laboratory.

5225.

State whether the following statements are true or false : (a) Coke is almost pure form of carbon. (b) Coal tar is a mixture of various substances. (c) Kerosene is not a fassil fuel. (d) CNG is more polluting than petrol. (e) Fossil fuels can be made in the laboratory.

Answer»

State whether the following statements are true or false :

(a) Coke is almost pure form of carbon.

(b) Coal tar is a mixture of various substances.

(c) Kerosene is not a fassil fuel.

(d) CNG is more polluting than petrol.

(e) Fossil fuels can be made in the laboratory.

Discussion

5226.	Define interconversion of states of matter. What are the two factors responsible for the change of state of matter ?
Answer» Define interconversion of states of matter. What are the two factors responsible for the change of state of matter ?

Discussion

5227.	Water has maximum density at ____
Answer» Water has maximum density at ____

Discussion

5228.	The mode of heat transfer that takes place during boiling of a liquid is known as ___.
Answer» The mode of heat transfer that takes place during boiling of a liquid is known as ___.

Discussion

5229.	Name an important source from which naphthalene balls are obtained.
Answer» Name an important source from which naphthalene balls are obtained.

Discussion

5230.	Name the non-metal used to make purple coloured solution which is applied on cuts and wounds as an antiseptic.
Answer» Name the non-metal used to make purple coloured solution which is applied on cuts and wounds as an antiseptic.

Discussion

5231.	Question 8 Explain how CO2 is able to control fires.
Answer» Question 8 Explain how $C O_{2}$ is able to control fires.

Discussion

5232.	Silver and gold do not react with oxygen even at a high temperature because they are highly reactive.
Answer» Silver and gold do not react with oxygen even at a high temperature because they are highly reactive.

Discussion

5233.	How many chemical bonds are there between the carbon atom and oxygen atom in the compound - carbon dioxide?
Answer» How many chemical bonds are there between the carbon atom and oxygen atom in the compound - carbon dioxide?

Discussion

5234.	Which of the following is fully fluorinated polymer?
Answer» Which of the following is fully fluorinated polymer?

Discussion

5235.	Is iron nail a combustible material ?
Answer» _{Is iron nail a combustible material ?}

Discussion

5236.	What happens to the temperature of the surroundings when an acid reacts with a base?
Answer» What happens to the temperature of the surroundings when an acid reacts with a base?

Discussion

5237.	Which of the following acids are mineral acids?
Answer» Which of the following acids are mineral acids?

Discussion

5238.	What is electrolyte and what is the process of electrolysis?
Answer» What is electrolyte and what is the process of electrolysis?

Discussion

5239.	What is petroleum and how is it refined? [2 MARKS]
Answer» What is petroleum and how is it refined? [2 MARKS]

Discussion

5240.	What are halogen atoms?
Answer» What are halogen atoms?

Discussion

5241.	Suspensions are mixtures in which the particles eventually ___ because the particle sizes are so large.
Answer» Suspensions are mixtures in which the particles eventually ___ because the particle sizes are so large.

Discussion

5242.	After the power cut Priya lighted a candle and stated thinking why there is a flame in candles. What do you think so?
Answer» After the power cut Priya lighted a candle and stated thinking why there is a flame in candles. What do you think so?

Discussion

5243.	Joining of repeating units to form a macromolecule is called
Answer» Joining of repeating units to form a macromolecule is called

Discussion

5244.	Substance that does not dissolve in a solution is termed as:
Answer» Substance that does not dissolve in a solution is termed as:

Discussion

5245.	The ratio of cocoon to silk obtained by sericulture is
Answer» The ratio of cocoon to silk obtained by sericulture is

Discussion

5246.	What are uses of carbon dioxide gas?
Answer» What are uses of carbon dioxide gas?

Discussion

5247.	A metal X reacts with dilute hydrochloric acid to form a gas Y. When a lighted matchstick is brought closer, this gas burns by producing a 'pop' sound. Identify the possible metals that can fit as X and also the gas Y from the given options?
Answer» A metal X reacts with dilute hydrochloric acid to form a gas Y. When a lighted matchstick is brought closer, this gas burns by producing a 'pop' sound. Identify the possible metals that can fit as X and also the gas Y from the given options?

Discussion

5248.	If two person is pulling a box in the same direction with 85 N and 65 N force. Find the net work done by the forces if net displacement of the box is 18m.
Answer» If two person is pulling a box in the same direction with 85 N and 65 N force. Find the net work done by the forces if net displacement of the box is 18m.

Discussion

5249.	What are the main sources of air pollution in cities? [2 MARKS]
Answer» What are the main sources of air pollution in cities? [2 MARKS]

Discussion

5250.	Terylene is a popular form of
Answer» Terylene is a popular form of

Discussion

Explore topic-wise InterviewSolutions in .

When MgO is dissolved in water, Mg(OH)2 is obtained. The solution thus obtained is ___ in nature.

Which process is similar to that of a burning candle except for the difference in temperature?

Whenever we write a chemical equation always we write all the gases in the molecular form . Why don't we do the same with the metals ?

A noble metal is one which is inert and does not react with acids like HCl,HNO3,H2SO4. Select an option with a set of two noble metals.

Student A keeps vessel in yellow zone while student B keeps vessel in blue zone of flame. Which statement will be correct accordingly?

How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal? [2 MARKS]

What will be the physical state of matter at:- (a) 0∘ (b) 100∘

Explain evaporation on the basis of molecular motion?

Avogadro number represents the number of atoms in ___.

What is the difference between element and molecules

Which of the following gas is not a green house gas?

With respect to diamond and graphite, which of the statement(s) given below is/are correct?

Which plastic is hard, highly polished and used for making floor tiles and kitchenware ?

Choose the synonym of the word. Exquisite

What is the spelling of JJThomson

Na + O → Y Y + H2O → Z The commercial name of Z is _________.

Shweta always cleans her utensils properly yet she observes a black layer at the bottom of the utensil. Why is it so?

Is there a vaccum between air and water molecules?

Question 2 Which one of the following has the highest calorific value? (a) Kerosene (b) LPG (c) Biogas (d) Petrol

Let 3^a=4,4^b=5,5^c=6,6^d=7,7^e=8 and 8^f=9. The value of product (abcdef) is

Plastics are not good for the environment. Still, they are used widely because:

Which among these samples are not a suspension?

Which of the following are not used in washing clothes?

State whether the following statements are true or false : (a) Coke is almost pure form of carbon. (b) Coal tar is a mixture of various substances. (c) Kerosene is not a fassil fuel. (d) CNG is more polluting than petrol. (e) Fossil fuels can be made in the laboratory.

Define interconversion of states of matter. What are the two factors responsible for the change of state of matter ?

Water has maximum density at ____

The mode of heat transfer that takes place during boiling of a liquid is known as ___.

Name an important source from which naphthalene balls are obtained.

Name the non-metal used to make purple coloured solution which is applied on cuts and wounds as an antiseptic.

Question 8 Explain how CO2 is able to control fires.

Silver and gold do not react with oxygen even at a high temperature because they are highly reactive.

How many chemical bonds are there between the carbon atom and oxygen atom in the compound - carbon dioxide?

Which of the following is fully fluorinated polymer?

Is iron nail a combustible material ?

What happens to the temperature of the surroundings when an acid reacts with a base?

Which of the following acids are mineral acids?

What is electrolyte and what is the process of electrolysis?

What is petroleum and how is it refined? [2 MARKS]

What are halogen atoms?

Suspensions are mixtures in which the particles eventually ___ because the particle sizes are so large.

After the power cut Priya lighted a candle and stated thinking why there is a flame in candles. What do you think so?

Joining of repeating units to form a macromolecule is called

Substance that does not dissolve in a solution is termed as:

The ratio of cocoon to silk obtained by sericulture is

What are uses of carbon dioxide gas?

A metal X reacts with dilute hydrochloric acid to form a gas Y. When a lighted matchstick is brought closer, this gas burns by producing a 'pop' sound. Identify the possible metals that can fit as X and also the gas Y from the given options?

If two person is pulling a box in the same direction with 85 N and 65 N force. Find the net work done by the forces if net displacement of the box is 18m.

What are the main sources of air pollution in cities? [2 MARKS]

Terylene is a popular form of