7248 + Interview Questions in Chemistry Page 97 InterviewSolution

4801.	The number of electrons Calcium could lose to gain it's octet is equal to proton number of ___________
Answer» The number of electrons Calcium could lose to gain it's octet is equal to proton number of ___________

Discussion

4802.	Statement 1: Some of the alkali metals are generally kept in kerosene. Statement 2: Lithium should be kept in kerosene because it is highly reactive.
Answer» Statement 1: Some of the alkali metals are generally kept in kerosene. Statement 2: Lithium should be kept in kerosene because it is highly reactive.

Discussion

4803.	An element Y is made up of 15 electrons and 16 neutrons. Which of the following is the correct symbolic representation of the element?
Answer» An element Y is made up of 15 electrons and 16 neutrons. Which of the following is the correct symbolic representation of the element?

Discussion

4804.	Petroleum was formed from dead organisms that once lived in the sea.
Answer» Petroleum was formed from dead organisms that once lived in the sea.

Discussion

4805.	Foil made of ____ was used in alpha-ray scattering experiment by Rutherford.
Answer» Foil made of ____ was used in alpha-ray scattering experiment by Rutherford.

Discussion

4806.	The metal Iron (Fe) when exposed to moist atmosphere forms hydrated Iron oxide as per the following reaction. This process is known as rusting which does not take place in the absence of ‘Y’. Identify ‘Y’ in the reaction.Fe+O2+Y→Fe2O3.nH2O
Answer» The metal Iron (Fe) when exposed to moist atmosphere forms hydrated Iron oxide as per the following reaction. This process is known as rusting which does not take place in the absence of ‘Y’. Identify ‘Y’ in the reaction. Fe+O₂+Y→Fe₂O₃.nH₂O

Discussion

4807.	What are the postulates of kinetic molecular theory of matter
Answer» What are the postulates of kinetic molecular theory of matter

Discussion

4808.	NaCl + H2O +CO2 +NH3 → NaHCO3 + X What is X?
Answer» NaCl + $H_{2} O$ + ${C O}_{2}$ + ${N H}_{3}$ → ${N a H C O}_{3}$ + X What is X?

4808.

NaCl + H2O +CO2 +NH3 → NaHCO3 + X What is X?

Answer»

NaCl + $H_{2} O$ + ${C O}_{2}$ + ${N H}_{3}$ → ${N a H C O}_{3}$ + X

What is X?

Discussion

4809.	The reactions which produce light and heat are known as _______________.
Answer» The reactions which produce light and heat are known as _______________.

Discussion

4810.	State one chemical property which can be used to distinguish a metal from a non-metal.
Answer» State one chemical property which can be used to distinguish a metal from a non-metal.

Discussion

4811.	Name any two places in India where natural gas is found.
Answer» Name any two places in India where natural gas is found.

Discussion

4812.	explain Quantum Mechanics
Answer» explain Quantum Mechanics

Discussion

4813.	i have a doubt in 8th grade syllabus.subject chemistry. chapter synthetic fibres and plastics how can we regard a particular material as monomer becuase that material itself is made up of repeated units.
Answer» i have a doubt in 8th grade syllabus.subject chemistry. chapter synthetic fibres and plastics how can we regard a particular material as monomer becuase that material itself is made up of repeated units.

Discussion

4814.	What is the fundamental thing that gives metals and non metals their properties
Answer» What is the fundamental thing that gives metals and non metals their properties

Discussion

4815.	In which case the iron nail will not corrode?
Answer» In which case the iron nail will not corrode?

4815.

In which case the iron nail will not corrode?

Answer»

In which case the iron nail will not corrode?

Discussion

4816.	After watching videos in the Byjus App one question that is not answered is what are Oxides?
Answer» After watching videos in the Byjus App one question that is not answered is what are Oxides?

Discussion

4817.	A missile has been fired with an initial speed u. If the speed is tripled, what will be the corresponding change in its kinetic energy?
Answer» A missile has been fired with an initial speed $u$ . If the speed is tripled, what will be the corresponding change in its kinetic energy?

Discussion

4818.	The reaction in which a more reactive element replaces the less reactive one from its compound is called__.
Answer» The reaction in which a more reactive element replaces the less reactive one from its compound is called__.

Discussion

4819.	During combustion of coal, the supporter of combustion is :-
Answer» During combustion of coal, the supporter of combustion is :-

Discussion

4820.	Give two uses of carbon monoxide.
Answer» Give two uses of carbon monoxide.

Discussion

4821.	In the following reaction, xMn2O7⟶yMnO2+zO2 x, y, and z respectively are:
Answer» In the following reaction, $x M n_{2} O_{7} ⟶ y M n O_{2} + z O_{2}$ x, y, and z respectively are:

Discussion

4822.	What is copper +sulphuric acid
Answer» What is copper +sulphuric acid

Discussion

4823.	In a chemical iron is unable to displace zinc from zinc sulphate why?
Answer» In a chemical iron is unable to displace zinc from zinc sulphate why?

Discussion

4824.	When hydrochloric acid is added to magnesium, which gas is liberated?
Answer» When hydrochloric acid is added to magnesium, which gas is liberated?

Discussion

4825.	What is the difference between a combustible and noncombustible substances?
Answer» What is the difference between a combustible and noncombustible substances?

Discussion

4826.	In the reaction 3MnO2(s) + 4Al(s)→3Mn(s) + 2Al2O3(s) the oxidising agent is
Answer» In the reaction $3 M n O_{2} (s) + 4 A l (s) \to 3 M n (s) + 2 A l_{2} O_{3} (s)$ the oxidising agent is

Discussion

4827.	Question 10 (b) Saloni took a piece of burning charcoal and collected the gas evolved in a test tube. (b) Write down word equations of all the reactions taking place in this process.
Answer» Question 10 (b) Saloni took a piece of burning charcoal and collected the gas evolved in a test tube. (b) Write down word equations of all the reactions taking place in this process.

Discussion

4828.	What is valency? What is the difference between losing and gaining a electron and we can justify it?
Answer» What is valency? What is the difference between losing and gaining a electron and we can justify it?

Discussion

4829.	Identify the physical state(s) of matter which can be easily compressed.
Answer» Identify the physical state(s) of matter which can be easily compressed.

Discussion

4830.	When potassium reacts with cold water then hydrogen gas burns with a _____ coloured flame.
Answer» When potassium reacts with cold water then hydrogen gas burns with a _____ coloured flame.

Discussion

4831.	Explain Solvation enthalpy of ionic compounds and give the difference between solubility and solvation enthalpy?
Answer» Explain Solvation enthalpy of ionic compounds and give the difference between solubility and solvation enthalpy?

Discussion

4832.	Why does combustion require oxygen and not someother gases
Answer» Why does combustion require oxygen and not someother gases

Discussion

4833.	For photosynthesis green plants require____________.
Answer» For photosynthesis green plants require____________.

Discussion

4834.	According to Thomson's model of the atom, which charges are distributed over which type of charges?
Answer» According to Thomson's model of the atom, which charges are distributed over which type of charges?

Discussion

4835.	What is the difference between ignition and combustion
Answer» What is the difference between ignition and combustion

Discussion

4836.	The combustion of a substance does not require:
Answer» The combustion of a substance does not require:

Discussion

4837.	What is one property of a suspension that is different from that of a solution or a colloid?
Answer» What is one property of a suspension that is different from that of a solution or a colloid?

Discussion

4838.	An atom of an element has electronic configuration of 2, 8, 1 Which of the following statements is correct?
Answer» An atom of an element has electronic configuration of 2, 8, 1 Which of the following statements is correct?

Discussion

4839.	A lot of dry powder of one of the following chemicals can be released over a fire to extinguish it. This chemical is : (a) plaster of Paris (b) baking soda (c) washing soda (d) bitumen
Answer» A lot of dry powder of one of the following chemicals can be released over a fire to extinguish it. This chemical is : (a) plaster of Paris (b) baking soda (c) washing soda (d) bitumen

4839.

A lot of dry powder of one of the following chemicals can be released over a fire to extinguish it. This chemical is : (a) plaster of Paris (b) baking soda (c) washing soda (d) bitumen

Answer»

A lot of dry powder of one of the following chemicals can be released over a fire to extinguish it. This chemical is :

(a) plaster of Paris

(b) baking soda

(c) washing soda

(d) bitumen

Discussion

4840.	Describe how coal is formed from dead vegitation. What is this process named
Answer» Describe how coal is formed from dead vegitation. What is this process named

Discussion

4841.	Tin cans are the tin electroplated on iron. These Tin cans are used to preserve food items. Why not iron cans use without Tin coating?
Answer» Tin cans are the tin electroplated on iron. These Tin cans are used to preserve food items. Why not iron cans use without Tin coating?

Discussion

4842.	Which one of the following yields better result in terms of heat when burning?
Answer» Which one of the following yields better result in terms of heat when burning?

Discussion

4843.	Why is the need for conservation of fossil fuels felt more today than a few hundred years ago?
Answer» Why is the need for conservation of fossil fuels felt more today than a few hundred years ago?

Discussion

4844.	Which pollutant gas is produced as a result of burning of fossil fuels like coal?
Answer» Which pollutant gas is produced as a result of burning of fossil fuels like coal?

Discussion

4845.	Which of the following is/are oxidation reactions?
Answer» Which of the following is/are oxidation reactions?

Discussion

4846.	The gas which occurs above the petroleum oil trapped under the rocks is called : (a) biogas (b) petroleum gas (c) natural gas (d) coal gas
Answer» The gas which occurs above the petroleum oil trapped under the rocks is called : (a) biogas (b) petroleum gas (c) natural gas (d) coal gas

4846.

The gas which occurs above the petroleum oil trapped under the rocks is called : (a) biogas (b) petroleum gas (c) natural gas (d) coal gas

Answer»

The gas which occurs above the petroleum oil trapped under the rocks is called :

(a) biogas

(b) petroleum gas

(c) natural gas

(d) coal gas

Discussion

4847.	What is polyester ? Name a popular polyester.
Answer» What is polyester ? Name a popular polyester.

Discussion

4848.	Burning of candle is an example of ______________.
Answer» Burning of candle is an example of ______________.

Discussion

4849.	State the uses of coke.
Answer» State the uses of coke.

Discussion

4850.	What conditions were maintained by J.J. Thomson during the production of cathode rays?
Answer» What conditions were maintained by J.J. Thomson during the production of cathode rays?

Discussion

Explore topic-wise InterviewSolutions in .

The number of electrons Calcium could lose to gain it's octet is equal to proton number of ___________

Statement 1: Some of the alkali metals are generally kept in kerosene. Statement 2: Lithium should be kept in kerosene because it is highly reactive.

An element Y is made up of 15 electrons and 16 neutrons. Which of the following is the correct symbolic representation of the element?

Petroleum was formed from dead organisms that once lived in the sea.

Foil made of ____ was used in alpha-ray scattering experiment by Rutherford.

The metal Iron (Fe) when exposed to moist atmosphere forms hydrated Iron oxide as per the following reaction. This process is known as rusting which does not take place in the absence of ‘Y’. Identify ‘Y’ in the reaction.Fe+O2+Y→Fe2O3.nH2O

What are the postulates of kinetic molecular theory of matter

NaCl + H2O +CO2 +NH3 → NaHCO3 + X What is X?

The reactions which produce light and heat are known as _______________.

State one chemical property which can be used to distinguish a metal from a non-metal.

Name any two places in India where natural gas is found.

explain Quantum Mechanics

i have a doubt in 8th grade syllabus.subject chemistry. chapter synthetic fibres and plastics how can we regard a particular material as monomer becuase that material itself is made up of repeated units.

What is the fundamental thing that gives metals and non metals their properties

In which case the iron nail will not corrode?

After watching videos in the Byjus App one question that is not answered is what are Oxides?

A missile has been fired with an initial speed u. If the speed is tripled, what will be the corresponding change in its kinetic energy?

The reaction in which a more reactive element replaces the less reactive one from its compound is called__.

During combustion of coal, the supporter of combustion is :-

Give two uses of carbon monoxide.

In the following reaction, xMn2O7⟶yMnO2+zO2 x, y, and z respectively are:

What is copper +sulphuric acid

In a chemical iron is unable to displace zinc from zinc sulphate why?

When hydrochloric acid is added to magnesium, which gas is liberated?

What is the difference between a combustible and noncombustible substances?

In the reaction 3MnO2(s) + 4Al(s)→3Mn(s) + 2Al2O3(s) the oxidising agent is

Question 10 (b) Saloni took a piece of burning charcoal and collected the gas evolved in a test tube. (b) Write down word equations of all the reactions taking place in this process.

What is valency? What is the difference between losing and gaining a electron and we can justify it?

Identify the physical state(s) of matter which can be easily compressed.

When potassium reacts with cold water then hydrogen gas burns with a _____ coloured flame.

Explain Solvation enthalpy of ionic compounds and give the difference between solubility and solvation enthalpy?

Why does combustion require oxygen and not someother gases

For photosynthesis green plants require____________.

According to Thomson's model of the atom, which charges are distributed over which type of charges?

What is the difference between ignition and combustion

The combustion of a substance does not require:

What is one property of a suspension that is different from that of a solution or a colloid?

An atom of an element has electronic configuration of 2, 8, 1 Which of the following statements is correct?

A lot of dry powder of one of the following chemicals can be released over a fire to extinguish it. This chemical is : (a) plaster of Paris (b) baking soda (c) washing soda (d) bitumen

Describe how coal is formed from dead vegitation. What is this process named

Tin cans are the tin electroplated on iron. These Tin cans are used to preserve food items. Why not iron cans use without Tin coating?

Which one of the following yields better result in terms of heat when burning?

Why is the need for conservation of fossil fuels felt more today than a few hundred years ago?

Which pollutant gas is produced as a result of burning of fossil fuels like coal?

Which of the following is/are oxidation reactions?

The gas which occurs above the petroleum oil trapped under the rocks is called : (a) biogas (b) petroleum gas (c) natural gas (d) coal gas

What is polyester ? Name a popular polyester.

Burning of candle is an example of ______________.

State the uses of coke.

What conditions were maintained by J.J. Thomson during the production of cathode rays?