7248 + Interview Questions in Chemistry Page 65 InterviewSolution

3201.	Explain structure of atoms
Answer» Explain structure of atoms

Discussion

3202.	Hydroelectric power station takes its water from a lake whose level is at height of 50 metre above the turbine. Assuming and overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1MW.( Take g = 10m/s2 )
Answer» Hydroelectric power station takes its water from a lake whose level is at height of 50 metre above the turbine. Assuming and overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1MW. ( Take g = 10m/s2 )

Discussion

3203.	In a solar panel, the metal used as the main ingredient is ___.
Answer» In a solar panel, the metal used as the main ingredient is ___.

Discussion

3204.	Which of the following substances will undergo a chemical change if kept in the open for a week?
Answer» Which of the following substances will undergo a chemical change if kept in the open for a week?

Discussion

3205.	What are the different forms in which water can exists on Earth?
Answer» What are the different forms in which water can exists on Earth?

Discussion

3206.	Explain Hybridization of SF4?
Answer» Explain Hybridization of SF4?

Discussion

3207.	In froth floatation process pine oil act as a stabilisers b collectors c leaching agent d depressant
Answer» In froth floatation process pine oil act as a stabilisers b collectors c leaching agent d depressant

Discussion

3208.	how to find hybridisation of nitrogen in NO2,NO,N2O5
Answer» how to find hybridisation of nitrogen in NO2,NO,N2O5

Discussion

3209.	Question 5 (c)Tick True/False against the following statements :Coke is the purest form of carbon.
Answer» Question 5 (c) Tick True/False against the following statements : Coke is the purest form of carbon.

Discussion

3210.	Discuss the importance of dissolved salts in water.
Answer» Discuss the importance of dissolved salts in water.

Discussion

3211.	Classify plastics on the basis of effect of heat on them.
Answer» Classify plastics on the basis of effect of heat on them.

Discussion

3212.	The following figure denotes air pollution, which of the following reaction supports this phenomenon of air pollution?
Answer» The following figure denotes air pollution, which of the following reaction supports this phenomenon of air pollution?

3212.

The following figure denotes air pollution, which of the following reaction supports this phenomenon of air pollution?

Answer»

The following figure denotes air pollution, which of the following reaction supports this phenomenon of air pollution?

Discussion

3213.	Which of the following is a metal?
Answer» Which of the following is a metal?

Discussion

3214.	What are inorganic,organic,molecular and complex compound in an easy language and an example
Answer» What are inorganic,organic,molecular and complex compound in an easy language and an example

Discussion

3215.	All steps with definition in metallurgy
Answer» All steps with definition in metallurgy

Discussion

3216.	what should be the value of final temperature so that 1L gas becomes 2.5L at constant pressure if initial temperature was 300K
Answer» what should be the value of final temperature so that 1L gas becomes 2.5L at constant pressure if initial temperature was 300K

Discussion

3217.	Rayon, a synthetic fibre is made from:
Answer» Rayon, a synthetic fibre is made from:

Discussion

3218.	Formula for calculating nitrogen by Dumas method
Answer» Formula for calculating nitrogen by Dumas method

Discussion

3219.	59. If % abundance of two isotopes of carbon 6c12 and 6c14 are 90% and 10% respectively then number of c-12 atoms in 12g sample Wil be approximately??
Answer» 59. If % abundance of two isotopes of carbon 6c12 and 6c14 are 90% and 10% respectively then number of c-12 atoms in 12g sample Wil be approximately??

Discussion

3220.	Why should we not burn plastic items?
Answer» Why should we not burn plastic items?

Discussion

3221.	Explain in detail 'metals and non metals in our daily life'.
Answer» Explain in detail 'metals and non metals in our daily life'.

Discussion

3222.	Select the major source of water pollutant in unindustrialized countries.
Answer» Select the major source of water pollutant in unindustrialized countries.

Discussion

3223.	Non metallic oxide is acidic in nature. What happens when carbon dioxide reacts with water?
Answer» Non metallic oxide is acidic in nature. What happens when carbon dioxide reacts with water?

Discussion

3224.	Distinguish between solids, liquids and gases on the basis of their following properties :(a) compressibility(b) fluidity(c) rigidity(d) expansion on heating
Answer» Distinguish between solids, liquids and gases on the basis of their following properties : (a) compressibility (b) fluidity (c) rigidity (d) expansion on heating

Discussion

3225.	The alkyne used in the manufacturing of PVC is ___.
Answer» The alkyne used in the manufacturing of PVC is ___.

Discussion

3226.	How was environment treated earlier? What has been the change in perception? Discuss.
Answer» How was environment treated earlier? What has been the change in perception? Discuss.

Discussion

3227.	Which of the following is incorrect?
Answer» Which of the following is incorrect?

Discussion

3228.	Give proper definition of dhekli
Answer» Give proper definition of dhekli

Discussion

3229.	1 u or 1 amu (atomic mass unit) is equal to: _______.
Answer» 1 u or 1 amu (atomic mass unit) is equal to: _______.

Discussion

3230.	Nitrogen gas N2 of mass 28 g is kept in a vessel at pressure of 10 atm and temperature 57 degree Celsius. Due to leakage of N2 gas its pressure falls to 5 atm and temperature to 27 degree Celsius . The amount of N2 gas leaked out is
Answer» Nitrogen gas N2 of mass 28 g is kept in a vessel at pressure of 10 atm and temperature 57 degree Celsius. Due to leakage of N2 gas its pressure falls to 5 atm and temperature to 27 degree Celsius . The amount of N2 gas leaked out is

Discussion

3231.	___dissolved in water supports aquatic life.
Answer» ___dissolved in water supports aquatic life.

Discussion

3232.	equimolar mixture of A and B form an ideal solution at 300K. The vapour of this solution is condensed in second container and temperature is maintained at 300K. The vapour of second container is condensed into third container and temperature is maintained at 300K. If total vapour pressure of solution in third container in x mmHg. the value of x/9 is [pnot A =100 and pnotB = 200]
Answer» equimolar mixture of A and B form an ideal solution at 300K. The vapour of this solution is condensed in second container and temperature is maintained at 300K. The vapour of second container is condensed into third container and temperature is maintained at 300K. If total vapour pressure of solution in third container in x mmHg. the value of x/9 is [pnot A =100 and pnotB = 200]

Discussion

3233.	The volume of one liter water upon vaporization at STP is nearly
Answer» The volume of one liter water upon vaporization at STP is nearly

Discussion

3234.	Write a brief note on homogeneous mixtures.
Answer» Write a brief note on homogeneous mixtures.

Discussion

3235.	Which of these is a natural source of pollution?
Answer» Which of these is a natural source of pollution?

Discussion

3236.	A water sample contains magnesium bicarbonates. It does not lather with soap. How can we make the water sample useful for cleaning clothes?
Answer» A water sample contains magnesium bicarbonates. It does not lather with soap. How can we make the water sample useful for cleaning clothes?

Discussion

3237.

Match the following. ‘A’ ‘B’ (a) Fullerene 1. Na2CO3 (b) Graphite 2. Cutting metals (c) Diamond 3. Hexagonal arrangement of atoms (d) Washing soda 4. C60

Answer»

Match the following.

‘A’		‘B’
(a)	Fullerene		1.	Na₂CO₃
(b)	Graphite		2.	Cutting metals
(c)	Diamond		3.	Hexagonal arrangement of atoms
(d)	Washing soda		4.	C₆₀

Discussion

3238.	(a) Collect different kinds of packaging material. What was thepurpose for which each one was used? Discuss in groups. (b) Givean example in which packaging could have been reduced?(c) Writea story on how packaging increases the amount of garbage.
Answer» (a) Collect different kinds of packaging material. What was the purpose for which each one was used? Discuss in groups. (b) Give an example in which packaging could have been reduced? (c) Write a story on how packaging increases the amount of garbage.

3238.

(a) Collect different kinds of packaging material. What was thepurpose for which each one was used? Discuss in groups. (b) Givean example in which packaging could have been reduced?(c) Writea story on how packaging increases the amount of garbage.

Answer»

(a) Collect different kinds of packaging material. What was the
purpose for which each one was used? Discuss in groups.

(b) Give
an example in which packaging could have been reduced?

(c) Write
a story on how packaging increases the amount of garbage.

Discussion

3239.	Cu(OH)2+HCl→X+YWhat is X and Y respectively?
Answer» $C u (O H)_{2} + H C l \to X + Y$ What is X and Y respectively?

3239.

Cu(OH)2+HCl→X+YWhat is X and Y respectively?

Answer»

$C u (O H)_{2} + H C l \to X + Y$

What is X and Y respectively?

Discussion

3240.	What do we mean by formation of precipitate during chemical reactions?
Answer» What do we mean by formation of precipitate during chemical reactions?

Discussion

3241.	The fabrics used for making umbrella contains millions of tiny holes so why cannot rain passes through it?
Answer» The fabrics used for making umbrella contains millions of tiny holes so why cannot rain passes through it?

Discussion

3242.	Answer the following.a. Thermocol is produced from which matterial ?b. Write uses of PVC.c. Write the natural or manmade row material of the following items. Matteress, beaker, bangle, chair, gunny bag, knife, pend. Which are the main ingredients of glass ? e. How the plastic is produced ?
Answer» Answer the following. a. Thermocol is produced from which matterial ? b. Write uses of PVC. c. Write the natural or manmade row material of the following items. Matteress, beaker, bangle, chair, gunny bag, knife, pen d. Which are the main ingredients of glass ? e. How the plastic is produced ?

Discussion

3243.	Question 8Which substance is formed by the carbonization of dead vegetation?(a) Coal(b) Coke(c) Coal gas(d) Coal tar
Answer» Question 8 Which substance is formed by the carbonization of dead vegetation? (a) Coal (b) Coke (c) Coal gas (d) Coal tar

Discussion

3244.	The boiling point of a solution of 0.512 gm of napthalene, C10H8, in 24 gm of chloroform is 0.5∘C higher than that of pure chloroform. The molal boiling point elevation constant of chloroform is (in K-kg/mol)
Answer» The boiling point of a solution of $0.512 gm$ of napthalene, $C_{10} H_{8},$ in $24 gm$ of chloroform is ${0.5}^{\circ} C$ higher than that of pure chloroform. The molal boiling point elevation constant of chloroform is (in K-kg/mol)

Discussion

3245.	A student carries out the decomposition reaction of lead nitrate to form three simpler substances. One of the substances formed during this reaction is a brown coloured gas whereas another substance formed is a yellow coloured solid.(a) What is the colour of lead nitrate?(b) How is the decomposition reaction of lead nitrate carried out?(c) Name the brown coloured gas produced in this reaction.(d) Name the yellow solid formed in this reaction.
Answer» A student carries out the decomposition reaction of lead nitrate to form three simpler substances. One of the substances formed during this reaction is a brown coloured gas whereas another substance formed is a yellow coloured solid. (a) What is the colour of lead nitrate? (b) How is the decomposition reaction of lead nitrate carried out? (c) Name the brown coloured gas produced in this reaction. (d) Name the yellow solid formed in this reaction.

Discussion

3246.	Sugar is a solid or a liquid ?with reason explain.
Answer» Sugar is a solid or a liquid ?with reason explain.

Discussion

3247.	Why are coal and petroleum called Earth resources?
Answer» Why are coal and petroleum called Earth resources?

Discussion

3248.	How is nitric acid vapour collected?
Answer» How is nitric acid vapour collected?

Discussion

3249.	What is variable valency ? Give two examples of elements showing variable valency.
Answer» What is variable valency ? Give two examples of elements showing variable valency.

Discussion

3250.	Choice of a fuel does not depends upon:
Answer» Choice of a fuel does not depends upon:

Discussion

Explore topic-wise InterviewSolutions in .

Explain structure of atoms

Hydroelectric power station takes its water from a lake whose level is at height of 50 metre above the turbine. Assuming and overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1MW.( Take g = 10m/s2 )

In a solar panel, the metal used as the main ingredient is ___.

Which of the following substances will undergo a chemical change if kept in the open for a week?

What are the different forms in which water can exists on Earth?

Explain Hybridization of SF4?

In froth floatation process pine oil act as a stabilisers b collectors c leaching agent d depressant

how to find hybridisation of nitrogen in NO2,NO,N2O5

Question 5 (c)Tick True/False against the following statements :Coke is the purest form of carbon.

Discuss the importance of dissolved salts in water.

Classify plastics on the basis of effect of heat on them.

The following figure denotes air pollution, which of the following reaction supports this phenomenon of air pollution?

Which of the following is a metal?

What are inorganic,organic,molecular and complex compound in an easy language and an example

All steps with definition in metallurgy

what should be the value of final temperature so that 1L gas becomes 2.5L at constant pressure if initial temperature was 300K

Rayon, a synthetic fibre is made from:

Formula for calculating nitrogen by Dumas method

59. If % abundance of two isotopes of carbon 6c12 and 6c14 are 90% and 10% respectively then number of c-12 atoms in 12g sample Wil be approximately??

Why should we not burn plastic items?

Explain in detail 'metals and non metals in our daily life'.

Select the major source of water pollutant in unindustrialized countries.

Non metallic oxide is acidic in nature. What happens when carbon dioxide reacts with water?

Distinguish between solids, liquids and gases on the basis of their following properties :(a) compressibility(b) fluidity(c) rigidity(d) expansion on heating

The alkyne used in the manufacturing of PVC is ___.

How was environment treated earlier? What has been the change in perception? Discuss.

Which of the following is incorrect?

Give proper definition of dhekli

1 u or 1 amu (atomic mass unit) is equal to: _______.

Nitrogen gas N2 of mass 28 g is kept in a vessel at pressure of 10 atm and temperature 57 degree Celsius. Due to leakage of N2 gas its pressure falls to 5 atm and temperature to 27 degree Celsius . The amount of N2 gas leaked out is

___dissolved in water supports aquatic life.

The volume of one liter water upon vaporization at STP is nearly

Write a brief note on homogeneous mixtures.

Which of these is a natural source of pollution?

A water sample contains magnesium bicarbonates. It does not lather with soap. How can we make the water sample useful for cleaning clothes?

Match the following. ‘A’ ‘B’ (a) Fullerene 1. Na2CO3 (b) Graphite 2. Cutting metals (c) Diamond 3. Hexagonal arrangement of atoms (d) Washing soda 4. C60

(a) Collect different kinds of packaging material. What was thepurpose for which each one was used? Discuss in groups. (b) Givean example in which packaging could have been reduced?(c) Writea story on how packaging increases the amount of garbage.

Cu(OH)2+HCl→X+YWhat is X and Y respectively?

What do we mean by formation of precipitate during chemical reactions?

The fabrics used for making umbrella contains millions of tiny holes so why cannot rain passes through it?

Answer the following.a. Thermocol is produced from which matterial ?b. Write uses of PVC.c. Write the natural or manmade row material of the following items. Matteress, beaker, bangle, chair, gunny bag, knife, pend. Which are the main ingredients of glass ? ​e. How the plastic is produced ?

Question 8Which substance is formed by the carbonization of dead vegetation?(a) Coal(b) Coke(c) Coal gas(d) Coal tar

The boiling point of a solution of 0.512 gm of napthalene, C10H8, in 24 gm of chloroform is 0.5∘C higher than that of pure chloroform. The molal boiling point elevation constant of chloroform is (in K-kg/mol)

Sugar is a solid or a liquid ?with reason explain.

Why are coal and petroleum called Earth resources?

How is nitric acid vapour collected?

What is variable valency ? Give two examples of elements showing variable valency.

Choice of a fuel does not depends upon:

Answer the following.a. Thermocol is produced from which matterial ?b. Write uses of PVC.c. Write the natural or manmade row material of the following items. Matteress, beaker, bangle, chair, gunny bag, knife, pend. Which are the main ingredients of glass ? e. How the plastic is produced ?