5083 + Interview Questions in Chemistry Page 13 InterviewSolution

601.	What is waldeyer ring?Explain in simple words.
Answer» What is waldeyer ring?Explain in simple words.

Discussion

602.	the half life of a radioactive nucleus is 50 days . the time interval ( t2 - t1 ) between the time t2 when 2/3 of it has decayed and the time t1 when 1 /3 of it had decayed as (1) 30 days (2) 50 days (3) 60 days (4) 15 days
Answer» the half life of a radioactive nucleus is 50 days . the time interval ( t2 - t1 ) between the time t2 when 2/3 of it has decayed and the time t1 when 1 /3 of it had decayed as (1) 30 days (2) 50 days (3) 60 days (4) 15 days

Discussion

603.	A sheet of paper is used to make a paper boat. This is a ___ change. (reversible/irreversible)
Answer» A sheet of paper is used to make a paper boat. This is a ___ change. (reversible/irreversible)

603.

A sheet of paper is used to make a paper boat. This is a ___ change. (reversible/irreversible)

Answer»

A sheet of paper is used to make a paper boat. This is a ___ change. (reversible/irreversible)

Discussion

604.	Where can I find the Brownian motion in the videos in the guided section of chemistry???
Answer» Where can I find the Brownian motion in the videos in the guided section of chemistry???

Discussion

605.	What is a chemical reaction? Explain with an example.
Answer» What is a chemical reaction? Explain with an example.

Discussion

606.	Which substances can be separated by the sublimation method?
Answer» Which substances can be separated by the sublimation method?

Discussion

607.	What kind of solids are iodine and naphthalene?
Answer» What kind of solids are iodine and naphthalene?

Discussion

608.	For a first order reaction, (A)->products, the concentration of A changes from 0.1 M to 0.025M in 40 minutes. The rate of reaction when the concentration of A is 0.0 1 M is :-
Answer» For a first order reaction, (A)->products, the concentration of A changes from 0.1 M to 0.025M in 40 minutes. The rate of reaction when the concentration of A is 0.0 1 M is :-

Discussion

609.	Molarity equations are generally used when the n-factor of the compounds is same.WHY
Answer» Molarity equations are generally used when the n-factor of the compounds is same.WHY

Discussion

610.	The products obtained from destructive distillation of coal are:1) Coal tar 2) Coal Gas 3) Coke 4) AmmoniaArrange these products in the increasing order of their amounts produced.
Answer» The products obtained from destructive distillation of coal are: 1) Coal tar 2) Coal Gas 3) Coke 4) Ammonia Arrange these products in the increasing order of their amounts produced.

Discussion

611.	Why has the use of plastic become a matter of concern these days?
Answer» Why has the use of plastic become a matter of concern these days?

Discussion

612.	Which of the following complex have maximumnumber of rings and maximum stability ?(1) [Fe(CN) ]4- (2) [Ni(dmg)}(3) [Fe(en) ]+3 (4) [Fe(ox) ]3-
Answer» Which of the following complex have maximum number of rings and maximum stability ? (1) [Fe(CN) ]4- (2) [Ni(dmg)} (3) [Fe(en) ]+3 (4) [Fe(ox) ]3-

Discussion

613.	Name the following: [2 MARKS] i) The gas that is released when an acid reacts with metals. ii) The property of an acid which is responsible for itching of the skin.
Answer» Name the following: [2 MARKS] i) The gas that is released when an acid reacts with metals. ii) The property of an acid which is responsible for itching of the skin.

Discussion

614.	Razia conducted an experiment in the field related to the rate of percolation. She observed that it took 40 min for 200 mL of water to percolate through the soil sample. Calculate the rate of percolation.
Answer» Razia conducted an experiment in the field related to the rate of percolation. She observed that it took 40 min for 200 mL of water to percolate through the soil sample. Calculate the rate of percolation.

Discussion

615.	State whether it is true or false. The substances that react together during an chemical reaction are called products.
Answer» State whether it is true or false. The substances that react together during an chemical reaction are called products.

Discussion

616.	Formation of a solution from two components can be considered as -(i) Pure solvent → separated solvent molecules, ΔH1(ii) Pure solute → separated solute molecules, ΔH2(iii) Interaction between separated solvent and separated solute molecules in the solution, ΔH3Solution so formed will be ideal if :-(1)ΔHsolution = ΔH1 + ΔH2 + ΔH3(2)ΔHsolution = ΔH1 + ΔH2 – ΔH3(3)ΔHsolution = ΔH1 – ΔH2 – ΔH3(4)ΔHsolution = ΔH3 – ΔH1 – ΔH2
Answer» Formation of a solution from two components can be considered as - (i) Pure solvent → separated solvent molecules, ΔH1 (ii) Pure solute → separated solute molecules, ΔH2 (iii) Interaction between separated solvent and separated solute molecules in the solution, ΔH3 Solution so formed will be ideal if :- (1) ΔHsolution = ΔH1 + ΔH2 + ΔH3 (2) ΔHsolution = ΔH1 + ΔH2 – ΔH3 (3) ΔHsolution = ΔH1 – ΔH2 – ΔH3 (4) ΔHsolution = ΔH3 – ΔH1 – ΔH2

Discussion

617.	Question 11When air is blown from the mouth into a test-tube containing limewater, the limewater turned milky due to the presence of (a) oxygen(b) carbon dioxide(c) nitrogen(d) water vapour
Answer» Question 11 When air is blown from the mouth into a test-tube containing limewater, the limewater turned milky due to the presence of (a) oxygen (b) carbon dioxide (c) nitrogen (d) water vapour

Discussion

618.	What are isotropic and anisotropic solids?
Answer» What are isotropic and anisotropic solids?

Discussion

619.	What kind of change does this image represent?
Answer» What kind of change does this image represent?

619.

What kind of change does this image represent?

Answer»

What kind of change does this image represent?

Discussion

620.	Question 8:Which substances are produced by the neutralization process?
Answer» Question 8: Which substances are produced by the neutralization process?

620.

Question 8:Which substances are produced by the neutralization process?

Answer»

Question 8:

Which substances are produced by the neutralization process?

Discussion

621.	Silver is electro deposited on a metallic vessel of surface area 800 CM square by passing a current of .2 ampere 3 hours calculate the thickness of silver deposited given that its density is 10. 47 gram per centimetre cube
Answer» Silver is electro deposited on a metallic vessel of surface area 800 CM square by passing a current of .2 ampere 3 hours calculate the thickness of silver deposited given that its density is 10. 47 gram per centimetre cube

Discussion

622.	Which of the following properties does not describe a compound?
Answer» Which of the following properties does not describe a compound?

Discussion

623.	Describe characteristics and uses of coke
Answer» Describe characteristics and uses of coke

Discussion

624.	Do the cells need to expel carbon dioxide?
Answer» Do the cells need to expel carbon dioxide?

Discussion

625.	The overall charge on sodium chloride formed by the combination of an anion (Cl-) and a cation (Na+) is
Answer» The overall charge on sodium chloride formed by the combination of an anion (Cl^-) and a cation (Na⁺) is

Discussion

626.	Why do solids , liquids and gases differ in their physical state?
Answer» Why do solids , liquids and gases differ in their physical state?

Discussion

627.	Diseases such typhoid, cholera and jaundice are caused due to:
Answer» Diseases such typhoid, cholera and jaundice are caused due to:

Discussion

628.	The equilibrium constant K for the reaction H2(g) + 12(g) 2HI(g) at 700 K is 49. What is the equilibrium1constant for the reaction HI(g)H2(g )+ 2(g) at same temperature?2(1) 49(2) 0.005(3) 0.143(4) 14.3
Answer» The equilibrium constant K for the reaction H2(g) + 12(g) 2HI(g) at 700 K is 49. What is the equilibrium1constant for the reaction HI(g)H2(g )+ 2(g) at same temperature?2(1) 49(2) 0.005(3) 0.143(4) 14.3

Discussion

629.	_________ is a liquid metal.
Answer» _________ is a liquid metal.

Discussion

630.	(1) What is a molecule ?(2) What are the types of molecules ? Explain each with suitable examples.
Answer» (1) What is a molecule ? (2) What are the types of molecules ? Explain each with suitable examples.

Discussion

631.	ka value order for phenol, orthonirtophenol metanitrophenol and paranitrophenol
Answer» ka value order for phenol, orthonirtophenol metanitrophenol and paranitrophenol

Discussion

632.	How does a cube of ice transform itself into liquid water?
Answer» How does a cube of ice transform itself into liquid water?

Discussion

633.	The Haber's processfor the manufacture of ammonia is usually carried out at about 5000C.If a temperature of about 2500C was used instead of 5000C-
Answer» The Haber's process for the manufacture of ammonia is usually carried out at about 500⁰C. If a temperature of about 250⁰C was used instead of 500⁰C -

Discussion

634.	Write the third crystalline form of carbon and its uses.
Answer» Write the third crystalline form of carbon and its uses.

Discussion

635.	16. What is the difference between oil in water emulsion and water in oil emulsion
Answer» 16. What is the difference between oil in water emulsion and water in oil emulsion

Discussion

636.	The rate constant for a zero-order reaction is 2×10–2 mol L–1 sec–1, if the concentration of the reactant after 25 sec is 0.25 M, calculate the initial concentration.
Answer» The rate constant for a zero-order reaction is $2 \times 10^{- 2} {mol L}^{- 1} {sec}^{- 1}$ , if the concentration of the reactant after $25 sec$ is $0.25 M$ , calculate the initial concentration.

Discussion

637.	27. How many atoms are present in 0.05mole of ozone?
Answer» 27. How many atoms are present in 0.05mole of ozone?

Discussion

638.	Water changes into ice at 0C, by giving out heat energy, The heat energy so given out is called(1)specific heat of water(2)latent heat of fusion(3)latent heat of solidification of water(4)latent heat of vaporization
Answer» Water changes into ice at 0C, by giving out heat energy, The heat energy so given out is called (1)specific heat of water (2)latent heat of fusion (3)latent heat of solidification of water (4)latent heat of vaporization

Discussion

639.	Tick themost suitable answer in question 1 and 2.Inaddition to the rock particles, the soil contains(i) airand water(ii) waterand plants(iii) minerals,organic matter, air and water(iv) water,air and plants
Answer» Tick the most suitable answer in question 1 and 2. In addition to the rock particles, the soil contains (i) air and water (ii) water and plants (iii) minerals, organic matter, air and water (iv) water, air and plants

639.

Tick themost suitable answer in question 1 and 2.Inaddition to the rock particles, the soil contains(i) airand water(ii) waterand plants(iii) minerals,organic matter, air and water(iv) water,air and plants

Answer»

Tick the
most suitable answer in question 1 and 2.

In
addition to the rock particles, the soil contains

(i) air
and water

(ii) water
and plants

(iii) minerals,
organic matter, air and water

(iv) water,
air and plants

Discussion

640.	Slow oxidation of iron to form hydrated iron oxide is called:
Answer» Slow oxidation of iron to form hydrated iron oxide is called:

Discussion

641.	What is soil erosion? How it can be prevented?
Answer» What is soil erosion? How it can be prevented?

Discussion

642.	Which factors are taken into account to characterise the major elements of different moments of the past?
Answer» Which factors are taken into account to characterise the major elements of different moments of the past?

Discussion

643.	the rate law for the reaction, 2Cl2O → 2Cl2 + O2 at 200oC is found to be : rate = k[Cl2O]2(a) How would the rate change if [Cl2O] is reduced to one-third of its original value? (b) How should the [Cl2O] be changed in order to double the rate? (c) How would the rate change if [Cl2O] is raised to threefold of its original value?
Answer» the rate law for the reaction, 2Cl2O → 2Cl2 + O2 at 200oC is found to be : rate = k[Cl2O]2 (a) How would the rate change if [Cl2O] is reduced to one-third of its original value? (b) How should the [Cl2O] be changed in order to double the rate? (c) How would the rate change if [Cl2O] is raised to threefold of its original value?

Discussion

644.	Explain neutralisation with an example.
Answer» Explain neutralisation with an example.

Discussion

645.	3. how to predict group number and period number of given elements??
Answer» 3. how to predict group number and period number of given elements??

Discussion

646.	Question 5 (a)Draw the electron dot structure for ethanoic acid.
Answer» Question 5 (a) Draw the electron dot structure for ethanoic acid.

Discussion

647.	Helium is the second most abundant element in the Universe. Yet, it is not the most abundant on Earth - Why?
Answer» Helium is the second most abundant element in the Universe. Yet, it is not the most abundant on Earth - Why?

Discussion

648.	Why is it always recommended to store ferric chloride in an airtight container?
Answer» Why is it always recommended to store ferric chloride in an airtight container?

Discussion

649.	Consider the following statements- 1. Both Official and Corporate India are allergic to mention of clean technology 2. Failure in crops, according to the passage, is a life and death question for many Indians Which of the above statement/s is/are incorrectly stated?
Answer» Consider the following statements- 1. Both Official and Corporate India are allergic to mention of clean technology 2. Failure in crops, according to the passage, is a life and death question for many Indians Which of the above statement/s is/are incorrectly stated?

649.

Consider the following statements- 1. Both Official and Corporate India are allergic to mention of clean technology 2. Failure in crops, according to the passage, is a life and death question for many Indians Which of the above statement/s is/are incorrectly stated?

Answer»

Consider the following statements-

1. Both Official and Corporate India are allergic to mention of clean technology

2. Failure in crops, according to the passage, is a life and death question for many Indians

Which of the above statement/s is/are incorrectly stated?

Discussion

650.	When a cathode half cell electrode Ag+/Ag is connected with a reference electrode (Standard hydrogen electrode), the mearsured standard EMF of the cell is 0.80 V. What will be the standard electrode potential of Ag+/Ag?
Answer» When a cathode half cell electrode $A g^{+} / A g$ is connected with a reference electrode (Standard hydrogen electrode), the mearsured standard EMF of the cell is $0.80 V$ . What will be the standard electrode potential of $A g^{+} / A g$ ?

Discussion

Explore topic-wise InterviewSolutions in .

What is waldeyer ring?Explain in simple words.

the half life of a radioactive nucleus is 50 days . the time interval ( t2 - t1 ) between the time t2 when 2/3 of it has decayed and the time t1 when 1 /3 of it had decayed as (1) 30 days (2) 50 days (3) 60 days (4) 15 days

A sheet of paper is used to make a paper boat. This is a ___ change. (reversible/irreversible)

Where can I find the Brownian motion in the videos in the guided section of chemistry???

What is a chemical reaction? Explain with an example.

Which substances can be separated by the sublimation method?

What kind of solids are iodine and naphthalene?

For a first order reaction, (A)->products, the concentration of A changes from 0.1 M to 0.025M in 40 minutes. The rate of reaction when the concentration of A is 0.0 1 M is :-

Molarity equations are generally used when the n-factor of the compounds is same.WHY

The products obtained from destructive distillation of coal are:1) Coal tar 2) Coal Gas 3) Coke 4) AmmoniaArrange these products in the increasing order of their amounts produced.

Why has the use of plastic become a matter of concern these days?

Which of the following complex have maximumnumber of rings and maximum stability ?(1) [Fe(CN) ]4- (2) [Ni(dmg)}(3) [Fe(en) ]+3 (4) [Fe(ox) ]3-

Name the following: [2 MARKS] i) The gas that is released when an acid reacts with metals. ii) The property of an acid which is responsible for itching of the skin.

Razia conducted an experiment in the field related to the rate of percolation. She observed that it took 40 min for 200 mL of water to percolate through the soil sample. Calculate the rate of percolation.​

State whether it is true or false. The substances that react together during an chemical reaction are called products.

Question 11When air is blown from the mouth into a test-tube containing limewater, the limewater turned milky due to the presence of (a) oxygen(b) carbon dioxide(c) nitrogen(d) water vapour

What are isotropic and anisotropic solids?

What kind of change does this image represent?

Question 8:Which substances are produced by the neutralization process?

Silver is electro deposited on a metallic vessel of surface area 800 CM square by passing a current of .2 ampere 3 hours calculate the thickness of silver deposited given that its density is 10. 47 gram per centimetre cube

Which of the following properties does not describe a compound?

Describe characteristics and uses of coke

Do the cells need to expel carbon dioxide?

The overall charge on sodium chloride formed by the combination of an anion (Cl-) and a cation (Na+) is

Why do solids , liquids and gases differ in their physical state?

Diseases such typhoid, cholera and jaundice are caused due to:

The equilibrium constant K for the reaction H2(g) + 12(g) 2HI(g) at 700 K is 49. What is the equilibrium1constant for the reaction HI(g)H2(g )+ 2(g) at same temperature?2(1) 49(2) 0.005(3) 0.143(4) 14.3

_________ is a liquid metal.

(1) What is a molecule ?(2) What are the types of molecules ? Explain each with suitable examples.

ka value order for phenol, orthonirtophenol metanitrophenol and paranitrophenol

How does a cube of ice transform itself into liquid water?

The Haber's processfor the manufacture of ammonia is usually carried out at about 5000C.If a temperature of about 2500C was used instead of 5000C-

Write the third crystalline form of carbon and its uses.

16. What is the difference between oil in water emulsion and water in oil emulsion

The rate constant for a zero-order reaction is 2×10–2 mol L–1 sec–1, if the concentration of the reactant after 25 sec is 0.25 M, calculate the initial concentration.

27. How many atoms are present in 0.05mole of ozone?

Water changes into ice at 0C, by giving out heat energy, The heat energy so given out is called(1)specific heat of water(2)latent heat of fusion(3)latent heat of solidification of water(4)latent heat of vaporization

Tick themost suitable answer in question 1 and 2.Inaddition to the rock particles, the soil contains(i) airand water(ii) waterand plants(iii) minerals,organic matter, air and water(iv) water,air and plants

Slow oxidation of iron to form hydrated iron oxide is called:

What is soil erosion? How it can be prevented?

Which factors are taken into account to characterise the major elements of different moments of the past?

Explain neutralisation with an example.

3. how to predict group number and period number of given elements??

Question 5 (a)Draw the electron dot structure for ethanoic acid.

Helium is the second most abundant element in the Universe. Yet, it is not the most abundant on Earth - Why?

Why is it always recommended to store ferric chloride in an airtight container?

Consider the following statements- 1. Both Official and Corporate India are allergic to mention of clean technology 2. Failure in crops, according to the passage, is a life and death question for many Indians Which of the above statement/s is/are incorrectly stated?

When a cathode half cell electrode Ag+/Ag is connected with a reference electrode (Standard hydrogen electrode), the mearsured standard EMF of the cell is 0.80 V. What will be the standard electrode potential of Ag+/Ag?

Razia conducted an experiment in the field related to the rate of percolation. She observed that it took 40 min for 200 mL of water to percolate through the soil sample. Calculate the rate of percolation.