10223 + Interview Questions in Chemistry Page 195 InterviewSolution

9701.	A sample contains 22 gms of carbon dioxide. This is equal to:
Answer» A sample contains 22 gms of carbon dioxide. This is equal to:

Discussion

9702.	Give reason: (a)Freezing of water to ice and evaporation of water are physical changes. (b)Burning of a candle is both a physical and a chemical change. (c)Burning of paper is a chemical change. (d)Cutting of a cloth piece is a physical change, though it cannot be reversed.
Answer» Give reason: (a)Freezing of water to ice and evaporation of water are physical changes. (b)Burning of a candle is both a physical and a chemical change. (c)Burning of paper is a chemical change. (d)Cutting of a cloth piece is a physical change, though it cannot be reversed.

9702.

Give reason: (a)Freezing of water to ice and evaporation of water are physical changes. (b)Burning of a candle is both a physical and a chemical change. (c)Burning of paper is a chemical change. (d)Cutting of a cloth piece is a physical change, though it cannot be reversed.

Answer»

Give reason:

(a)Freezing of water to ice and evaporation of water are physical changes.

(b)Burning of a candle is both a physical and a chemical change.

(c)Burning of paper is a chemical change.

(d)Cutting of a cloth piece is a physical change, though it cannot be reversed.

Discussion

9703.	what happens to dry ice when pressure is realeased?what is it chemically called?give one application of dry ice.
Answer» what happens to dry ice when pressure is realeased?what is it chemically called?give one application of dry ice.

Discussion

9704.	The crystals of sodium chloride produces crackling sound on heating, called _________ .
Answer» The crystals of sodium chloride produces crackling sound on heating, called _________ .

Discussion

9705.	In context with beryllium, which one of the following statements is incorrect?
Answer» In context with beryllium, which one of the following statements is incorrect?

Discussion

9706.	When some amount of salt is dissolved in plenty of water, which statement is most likely to be correct about the resulting solution?
Answer» When some amount of salt is dissolved in plenty of water, which statement is most likely to be correct about the resulting solution?

Discussion

9707.	What is the role of animals in the formation of ammonium compounds?
Answer» What is the role of animals in the formation of ammonium compounds?

Discussion

9708.	What are isobars? Explain with an example.
Answer» What are isobars? Explain with an example.

Discussion

9709.	Differentiate between metals and non-metals.
Answer» Differentiate between metals and non-metals.

Discussion

9710.	Complete the following word equations : (a) Sodium hydroxide + zinc → hydrogen +...................... (b) Calcium +water → calcium hydroxide+...............
Answer» Complete the following word equations : (a) Sodium hydroxide + zinc $\to$ hydrogen +...................... (b) Calcium +water $\to$ calcium hydroxide+...............

9710.

Complete the following word equations : (a) Sodium hydroxide + zinc → hydrogen +...................... (b) Calcium +water → calcium hydroxide+...............

Answer»

Complete the following word equations :

(a) Sodium hydroxide + zinc $\to$ hydrogen +......................

(b) Calcium +water $\to$ calcium hydroxide+...............

Discussion

9711.	Name the three subatomic particles present in an atom?
Answer» Name the three subatomic particles present in an atom?

Discussion

9712.	You are given four compounds in which an element is kept in square brackets. [Mn]2O3, H[N]O3, K[Mn]O4 and H2[C]O3 Select the option that represents the correct order of the compounds on the basis of increasing oxidation number value of the element in the square bracket that is higher the value of the oxidation number of the element in the square bracket higher its placement.
Answer» You are given four compounds in which an element is kept in square brackets. $[M n]_{2} O_{3}$ , $H [N] O_{3}$ , $K [M n] O_{4}$ and $H_{2} [C] O_{3}$ Select the option that represents the correct order of the compounds on the basis of increasing oxidation number value of the element in the square bracket that is higher the value of the oxidation number of the element in the square bracket higher its placement.

9712.

You are given four compounds in which an element is kept in square brackets. [Mn]2O3, H[N]O3, K[Mn]O4 and H2[C]O3 Select the option that represents the correct order of the compounds on the basis of increasing oxidation number value of the element in the square bracket that is higher the value of the oxidation number of the element in the square bracket higher its placement.

Answer»

You are given four compounds in which an element is kept in square brackets.

$[M n]_{2} O_{3}$ , $H [N] O_{3}$ , $K [M n] O_{4}$ and $H_{2} [C] O_{3}$

Select the option that represents the correct order of the compounds on the basis of increasing oxidation number value of the element in the square bracket that is higher the value of the oxidation number of the element in the square bracket higher its placement.

Discussion

9713.	The postulate that atom was indivisible and indestructible is not correct at present? Why?
Answer» The postulate that atom was indivisible and indestructible is not correct at present? Why?

Discussion

9714.	A stationary cylinder of oxygen used in a hospital has the following characteristics at room temperature 300 K, gauge pressure 1.38 ×107 Pa, volume 16 L. If the flow rate, measured at atmospheric pressure, is constant at 2.4 L/min, the cylinder will last for nearly 5×n hrs. The value of n is, where n is an integer
Answer» A stationary cylinder of oxygen used in a hospital has the following characteristics at room temperature $300 K$ , gauge pressure $1.38 \times 10^{7} P a$ , volume $16 L$ . If the flow rate, measured at atmospheric pressure, is constant at 2.4 L/min, the cylinder will last for nearly $5 \times n$ hrs. The value of $n$ is, where $n$ is an integer

Discussion

9715.	What would happen if an object traveled faster than the speed of light for a very long duration on time
Answer» What would happen if an object traveled faster than the speed of light for a very long duration on time

Discussion

9716.	X is an ionic compound containing only magnesium, aluminium and oxygen. Which of the following can be the chemical formula for X?
Answer» X is an ionic compound containing only magnesium, aluminium and oxygen. Which of the following can be the chemical formula for X?

Discussion

9717.	Is the value of Avogadro constant is 6.022x10 to the power 23
Answer» Is the value of Avogadro constant is 6.022x10 to the power 23

Discussion

9718.	How many electrons are present in the kernel of Cl?
Answer» How many electrons are present in the kernel of Cl?

9718.

How many electrons are present in the kernel of Cl?

Answer»

How many electrons are present in the kernel of Cl?

Discussion

9719.	What is used in the trough in Hope's experiment?
Answer» What is used in the trough in Hope's experiment?

Discussion

9720.	Which of the following constitute for the mass of an atom?
Answer» Which of the following constitute for the mass of an atom?

Discussion

9721.	What is difference between distillation and fractional distillation
Answer» What is difference between distillation and fractional distillation

Discussion

9722.	What type of matter is sponge? Can it be be called as solid but it has high compressibility.If it is a solid give reason for your answer.
Answer» What type of matter is sponge? Can it be be called as solid but it has high compressibility.If it is a solid give reason for your answer.

Discussion

9723.	What is dry ice? Why is it so called? Give two uses of dry ice.
Answer» What is dry ice? Why is it so called? Give two uses of dry ice.

Discussion

9724.	Write a method by which lyophobic colloids can be coagulated.
Answer» Write a method by which lyophobic colloids can be coagulated.

Discussion

9725.	Nitric acid occurs in ___.
Answer» Nitric acid occurs in ___.

Discussion

9726.	Which among the following statements are correct for magnesium metal?
Answer» Which among the following statements are correct for magnesium metal?

Discussion

9727.	___________ is the method of separation of components of a mixture containing two miscible liquids that boil without decomposition and have sufficient difference in their boiling points.
Answer» ___________ is the method of separation of components of a mixture containing two miscible liquids that boil without decomposition and have sufficient difference in their boiling points.

Discussion

9728.	Which of the following will be the product(s) of the given reaction? Sodium Thiosulphate+Hydrochloric Acid→
Answer» Which of the following will be the product(s) of the given reaction? $S o d i u m T h i o s u l p h a t e + H y d r o c h l o r i c A c i d \to$

9728.

Which of the following will be the product(s) of the given reaction? Sodium Thiosulphate+Hydrochloric Acid→

Answer»

Which of the following will be the product(s) of the given reaction?

$S o d i u m T h i o s u l p h a t e + H y d r o c h l o r i c A c i d \to$

Discussion

9729.	Question 17 A shiny brown-colored element ‘X’ on heating in air becomes black in colour. Name the element ‘X’ and the black coloured compound formed.
Answer» Question 17 A shiny brown-colored element ‘X’ on heating in air becomes black in colour. Name the element ‘X’ and the black coloured compound formed.

Discussion

9730.	Total number of electron pairs present around the central atom in BeCl2 molecule is:2
Answer» Total number of electron pairs present around the central atom in ${BeCl}_{2}$ molecule is: 2

Discussion

9731.	For combustion oxygen is required then why the sun is burning because there is no oxygen in the space?
Answer» For combustion oxygen is required then why the sun is burning because there is no oxygen in the space?

Discussion

9732.	When NaOH reacts with Aluminium metal, following reaction occurs: NaOH+Al→Na[Al(OH)4]+Y If Y is a gas, identify it.
Answer» When NaOH reacts with Aluminium metal, following reaction occurs: $N a O H + A l \to N a [A l (O H)_{4}] + Y$ If Y is a gas, identify it.

9732.

When NaOH reacts with Aluminium metal, following reaction occurs: NaOH+Al→Na[Al(OH)4]+Y If Y is a gas, identify it.

Answer»

When NaOH reacts with Aluminium metal, following reaction occurs:

$N a O H + A l \to N a [A l (O H)_{4}] + Y$

If Y is a gas, identify it.

Discussion

9733.	Do you know the molecular mass of glucose and its structural formula?
Answer» Do you know the molecular mass of glucose and its structural formula?

Discussion

9734.	Discuss pros and cons of Dalton's atomic theory
Answer» Discuss pros and cons of Dalton's atomic theory

Discussion

9735.	Difference between colloidals and suspensions
Answer» Difference between colloidals and suspensions

Discussion

9736.	According to __________, during a chemical reaction, the total mass of the products remains equal to that of reactants
Answer» According to __________, during a chemical reaction, the total mass of the products remains equal to that of reactants

Discussion

9737.	In the given figure below, the appropriate terms A, B and C respectively are:
Answer» In the given figure below, the appropriate terms A, B and C respectively are:

9737.

In the given figure below, the appropriate terms A, B and C respectively are:

Answer»

In the given figure below, the appropriate terms A, B and C respectively are:

Discussion

9738.	Define diffusion . explain its bromine vapour activity
Answer» Define diffusion . explain its bromine vapour activity

Discussion

9739.	Which of the following mixtures are incorrectly labelled?
Answer» Which of the following mixtures are incorrectly labelled?

Discussion

9740.	Who is the scientist ho first measured the e/m ratio of electron?
Answer» Who is the scientist ho first measured the e/m ratio of electron?

Discussion

9741.	What is the formula of zinc sulphide
Answer» What is the formula of zinc sulphide

Discussion

9742.	Iron nails were dipped in a solution kept in a test tube. After half an hour, it was observed that the colour of the solution has changed. The solution present in the test tube was that of
Answer» Iron nails were dipped in a solution kept in a test tube. After half an hour, it was observed that the colour of the solution has changed. The solution present in the test tube was that of

Discussion

9743.	How many times is a proton heavier than an electron?
Answer» How many times is a proton heavier than an electron?

Discussion

9744.	The formula for sodium carbonate is:
Answer» The formula for sodium carbonate is:

Discussion

9745.	Which of the following are true?
Answer» Which of the following are true?

Discussion

9746.	In a chemical reaction, Hydrogen consist 4g, Oxygen consist 12g Product is formed water Calculate the amount of water in g
Answer» In a chemical reaction, Hydrogen consist 4g, Oxygen consist 12g Product is formed water Calculate the amount of water in g

Discussion

9747.	Give reasons (a) Physical properties of isotopes are different (b) Argon does not react. (c) Actual atomic mass is greater than mass number. (d) 3517Cl and 3717Cl do not differ in their chemical reactions.
Answer» Give reasons (a) Physical properties of isotopes are different (b) Argon does not react. (c) Actual atomic mass is greater than mass number. (d) $_{17}^{35} C l a n d_{17}^{37} C l$ do not differ in their chemical reactions.

9747.

Give reasons (a) Physical properties of isotopes are different (b) Argon does not react. (c) Actual atomic mass is greater than mass number. (d) 3517Cl and 3717Cl do not differ in their chemical reactions.

Answer»

Give reasons

(a) Physical properties of isotopes are different

(b) Argon does not react.

(c) Actual atomic mass is greater than mass number.

(d) $_{17}^{35} C l a n d_{17}^{37} C l$ do not differ in their chemical reactions.

Discussion

9748.	There is a large group of materials P which can be divided into three groups Q, R and S on the basis of their properties. The substances belonging to group Q can be solids, liquids or gases. The solids belonging to group Q are usually electrical insulators. Most of the substances of group R are solids which are good conductors of electricity. The substances belonging to group S are neither insulators like Q nor good conductors like R. The properties of S are intermediate between those of Q and R. (a) What could the group of materials P be? (b) Name the substances Q. Give two examples of such substances. (c) Name the substances R. Write two examples of such substances. (d) Name the substances S. Give two examples of such substances. (e) Out of Q, R and S, which substances are malleable and ductile?
Answer» There is a large group of materials P which can be divided into three groups Q, R and S on the basis of their properties. The substances belonging to group Q can be solids, liquids or gases. The solids belonging to group Q are usually electrical insulators. Most of the substances of group R are solids which are good conductors of electricity. The substances belonging to group S are neither insulators like Q nor good conductors like R. The properties of S are intermediate between those of Q and R. (a) What could the group of materials P be? (b) Name the substances Q. Give two examples of such substances. (c) Name the substances R. Write two examples of such substances. (d) Name the substances S. Give two examples of such substances. (e) Out of Q, R and S, which substances are malleable and ductile?

9748.

There is a large group of materials P which can be divided into three groups Q, R and S on the basis of their properties. The substances belonging to group Q can be solids, liquids or gases. The solids belonging to group Q are usually electrical insulators. Most of the substances of group R are solids which are good conductors of electricity. The substances belonging to group S are neither insulators like Q nor good conductors like R. The properties of S are intermediate between those of Q and R. (a) What could the group of materials P be? (b) Name the substances Q. Give two examples of such substances. (c) Name the substances R. Write two examples of such substances. (d) Name the substances S. Give two examples of such substances. (e) Out of Q, R and S, which substances are malleable and ductile?

Answer»

There is a large group of materials P which can be divided into three groups Q, R and S on the basis of their properties. The substances belonging to group Q can be solids, liquids or gases. The solids belonging to group Q are usually electrical insulators. Most of the substances of group R are solids which are good conductors of electricity. The substances belonging to group S are neither insulators like Q nor good conductors like R. The properties of S are intermediate between those of Q and R.

(a) What could the group of materials P be?

(b) Name the substances Q. Give two examples of such substances.

(c) Name the substances R. Write two examples of such substances.

(d) Name the substances S. Give two examples of such substances.

(e) Out of Q, R and S, which substances are malleable and ductile?

Discussion

9749.	What is the scientific name of particles which make up matter ?
Answer» What is the scientific name of particles which make up matter ?

Discussion

9750.	Which amongst the following gas is formed during the incomplete combustion of carbon?
Answer» Which amongst the following gas is formed during the incomplete combustion of carbon?

Discussion

Explore topic-wise InterviewSolutions in .

A sample contains 22 gms of carbon dioxide. This is equal to:

Give reason: (a)Freezing of water to ice and evaporation of water are physical changes. (b)Burning of a candle is both a physical and a chemical change. (c)Burning of paper is a chemical change. (d)Cutting of a cloth piece is a physical change, though it cannot be reversed.

what happens to dry ice when pressure is realeased?what is it chemically called?give one application of dry ice.

The crystals of sodium chloride produces crackling sound on heating, called _________ .

In context with beryllium, which one of the following statements is incorrect?

When some amount of salt is dissolved in plenty of water, which statement is most likely to be correct about the resulting solution?

What is the role of animals in the formation of ammonium compounds?

What are isobars? Explain with an example.

Differentiate between metals and non-metals.

Complete the following word equations : (a) Sodium hydroxide + zinc → hydrogen +...................... (b) Calcium +water → calcium hydroxide+...............

Name the three subatomic particles present in an atom?

The postulate that atom was indivisible and indestructible is not correct at present? Why?

What would happen if an object traveled faster than the speed of light for a very long duration on time

X is an ionic compound containing only magnesium, aluminium and oxygen. Which of the following can be the chemical formula for X?

Is the value of Avogadro constant is 6.022x10 to the power 23

How many electrons are present in the kernel of Cl?

What is used in the trough in Hope's experiment?

Which of the following constitute for the mass of an atom?

What is difference between distillation and fractional distillation

What type of matter is sponge? Can it be be called as solid but it has high compressibility.If it is a solid give reason for your answer.

What is dry ice? Why is it so called? Give two uses of dry ice.

Write a method by which lyophobic colloids can be coagulated.

Nitric acid occurs in ___.

Which among the following statements are correct for magnesium metal?

___________ is the method of separation of components of a mixture containing two miscible liquids that boil without decomposition and have sufficient difference in their boiling points.

Which of the following will be the product(s) of the given reaction? Sodium Thiosulphate+Hydrochloric Acid→

Question 17 A shiny brown-colored element ‘X’ on heating in air becomes black in colour. Name the element ‘X’ and the black coloured compound formed.

Total number of electron pairs present around the central atom in BeCl2 molecule is:2

For combustion oxygen is required then why the sun is burning because there is no oxygen in the space?

When NaOH reacts with Aluminium metal, following reaction occurs: NaOH+Al→Na[Al(OH)4]+Y If Y is a gas, identify it.

Do you know the molecular mass of glucose and its structural formula?

Discuss pros and cons of Dalton's atomic theory

Difference between colloidals and suspensions

According to __________, during a chemical reaction, the total mass of the products remains equal to that of reactants

In the given figure below, the appropriate terms A, B and C respectively are:

Define diffusion . explain its bromine vapour activity

Which of the following mixtures are incorrectly labelled?

Who is the scientist ho first measured the e/m ratio of electron?

What is the formula of zinc sulphide

Iron nails were dipped in a solution kept in a test tube. After half an hour, it was observed that the colour of the solution has changed. The solution present in the test tube was that of

How many times is a proton heavier than an electron?

The formula for sodium carbonate is:

Which of the following are true?

In a chemical reaction, Hydrogen consist 4g, Oxygen consist 12g Product is formed water Calculate the amount of water in g

Give reasons (a) Physical properties of isotopes are different (b) Argon does not react. (c) Actual atomic mass is greater than mass number. (d) 3517Cl and 3717Cl do not differ in their chemical reactions.

What is the scientific name of particles which make up matter ?

Which amongst the following gas is formed during the incomplete combustion of carbon?