5083 + Interview Questions in Chemistry Page 33 InterviewSolution

1601.	WHAT IS THE DIFFERENCE BETWEEN ATOMIC MASS AND ATOMIC VALENCY
Answer» WHAT IS THE DIFFERENCE BETWEEN ATOMIC MASS AND ATOMIC VALENCY

Discussion

1602.	what is correct order of stability of alkali metal chlorides
Answer» what is correct order of stability of alkali metal chlorides

Discussion

1603.	Clotting of blood is an example of _____ change.
Answer» Clotting of blood is an example of _____ change.

Discussion

1604.	What are physically Change
Answer» What are physically Change

Discussion

1605.	25. Unit of atomic mass previously
Answer» 25. Unit of atomic mass previously

Discussion

1606.	The process in which forests are converted into pastures, then into arid land and finally into deserts is known as _________.
Answer» The process in which forests are converted into pastures, then into arid land and finally into deserts is known as _________.

Discussion

1607.	If 0 degree Celsius is converted into Kelvin scale, then it will show___K.
Answer» If 0 degree Celsius is converted into Kelvin scale, then it will show___K.

Discussion

1608.	How much positive and negative charge is in water molecule
Answer» How much positive and negative charge is in water molecule

Discussion

1609.	For the cell reaction 2Ce4++Co→2Ce3++Co2+Eocell is 1.89 V. If EoCo2+\|Co is−0.28 V, What is the value of EoCe4+\|Ce3+
Answer» For the cell reaction $2 C e^{4 +} + C o \to 2 C e^{3 +} + C o^{2 +}$ $E_{c e l l}^{o} is 1.89 V$ . $If E_{C o^{2 +} \| C o}^{o} is - 0.28 V$ , What is the value of $E_{C e^{4 +} \| C e^{3 +}}^{o}$

Discussion

1610.	Discuss some characteristics of chemical changes. [3 MARKS]
Answer» Discuss some characteristics of chemical changes. [3 MARKS]

Discussion

1611.	Which of the following can be separated using a funnel?
Answer» Which of the following can be separated using a funnel?

Discussion

1612.	Which of the following is NOT a feature of a physical change?
Answer» Which of the following is NOT a feature of a physical change?

Discussion

1613.	Which of the following is a pH range for drinking water?
Answer» Which of the following is a pH range for drinking water?

Discussion

1614.	The concentric square presentation below shows three ecological level of organisations on the earth.P CommunityQ BiosphereR OrganismWhich of the given best represents the relationships of these ecological levels of organisation on the earth?
Answer» The concentric square presentation below shows three ecological level of organisations on the earth. P Community Q Biosphere R Organism Which of the given best represents the relationships of these ecological levels of organisation on the earth?

Discussion

1615.	Which of the following statement describes the relationship between sanitation and disease?
Answer» Which of the following statement describes the relationship between sanitation and disease?

Discussion

1616.	The indicators which reacts with acids don't reacts with base.True /false
Answer» The indicators which reacts with acids don't reacts with base.True /false

Discussion

1617.	Which among the following is combustible?
Answer» Which among the following is combustible?

Discussion

1618.	Both temporary and permanent hardness in water can be removed by the addition of washing soda. Which of the following reactions represents the removal of permanent hardness in water?
Answer» Both temporary and permanent hardness in water can be removed by the addition of washing soda. Which of the following reactions represents the removal of permanent hardness in water?

Discussion

1619.	Which among the following is an exothermic reaction?
Answer» Which among the following is an exothermic reaction?

Discussion

1620.	Question 3:How does a burning candle show both physical and chemical changes?
Answer» Question 3: How does a burning candle show both physical and chemical changes?

Discussion

1621.	The mixture of oil and water is allowed to settle for a while. What will be our final observation?
Answer» The mixture of oil and water is allowed to settle for a while. What will be our final observation?

Discussion

1622.	Which of the following compounds cannot be used as an antacid during acid indigestion?
Answer» Which of the following compounds cannot be used as an antacid during acid indigestion?

Discussion

1623.	What is the difference between boiling and vaporisation ? what is the latent heat of vaporisation?
Answer» What is the difference between boiling and vaporisation ? what is the latent heat of vaporisation?

Discussion

1624.	Look at Picture 1. Write three sentences on what the trees give us.__________________________________________________________________________________________________________________________________________Now look at Picture 2. Write three sentences on how we harm the trees.______________________________________________________________________________________________________________________________________________________________________________________________________________________________________Match the opposites. One has been done for you.
Answer» Look at Picture 1. Write three sentences on what the trees give us. ______________________________________________ ______________________________________________ ______________________________________________ Now look at Picture 2. Write three sentences on how we harm the trees. ______________________________________________ ______________________________________________ ______________________________________________ ______________________________________________ ______________________________________________ Match the opposites. One has been done for you.

Discussion

1625.	Which of the following are obtained by destructive distillation of coal?
Answer» Which of the following are obtained by destructive distillation of coal?

Discussion

1626.	What is a balanced chemical equation
Answer» What is a balanced chemical equation

Discussion

1627.	How does the pH change when the solution of base is diluted using water?
Answer» How does the pH change when the solution of base is diluted using water?

Discussion

1628.	Electrolytes find a primary application in the working of a cell. The electrolyte in the cell provides a medium for ion transport between the cathode and anode of a battery. Among the following solutions, which one would you choose as an electrolyte to maximise the efficiency of the cell?[0.8 mark]
Answer» Electrolytes find a primary application in the working of a cell. The electrolyte in the cell provides a medium for ion transport between the cathode and anode of a battery. Among the following solutions, which one would you choose as an electrolyte to maximise the efficiency of the cell? [0.8 mark]

Discussion

1629.	Calculate the reduction potential for the following half cell at 25∘C: Ag(s)\|Ag+(aq, 10−5 M); E0Ag+/Ag= 0.80 V
Answer» Calculate the reduction potential for the following half cell at $25^{\circ} C$ : $A g (s) \| A g^{+} (a q, 10^{- 5} M); E_{A g^{+} / A g}^{0} = 0.80 V$

Discussion

1630.	Answer in your own words.(a) Explain with the help of a diagram how soil is formed.(b) Why is there a shortage of water even though it occupies about 71% of the earth’s surface?(c) What are the various constituents of air? Write their uses.(d) Why are air, water and land considered to be valuable natural resources?
Answer» Answer in your own words. (a) Explain with the help of a diagram how soil is formed. (b) Why is there a shortage of water even though it occupies about 71% of the earth’s surface? (c) What are the various constituents of air? Write their uses. (d) Why are air, water and land considered to be valuable natural resources?

Discussion

1631.	The given P−U graph shows the variation of internal energy of an ideal gas with increase in pressure. Which of the following P−V graphs is equivalent to this graph?
Answer» The given $P - U$ graph shows the variation of internal energy of an ideal gas with increase in pressure. Which of the following $P - V$ graphs is equivalent to this graph?

Discussion

1632.	Explain why -(i) Oil does not mix in water. However, oil and water become homogeneous if a sufficient quantity of detergent is added.(ii) Soap cannot be used in hard water.
Answer» Explain why - (i) Oil does not mix in water. However, oil and water become homogeneous if a sufficient quantity of detergent is added. (ii) Soap cannot be used in hard water.

1632.

Explain why -(i) Oil does not mix in water. However, oil and water become homogeneous if a sufficient quantity of detergent is added.(ii) Soap cannot be used in hard water.

Answer»

Explain why -

(i) Oil does not mix in water. However, oil and water become homogeneous if a sufficient quantity of detergent is added.

(ii) Soap cannot be used in hard water.

Discussion

1633.	Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.Carbon dioxide
Answer» Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere. Carbon dioxide

Discussion

1634.	We can prevent ourselves from getting infected by water-borne diseases by consuming clean drinking water. Explain.
Answer» We can prevent ourselves from getting infected by water-borne diseases by consuming clean drinking water. Explain.

Discussion

1635.	What is meant by radioactive sodium or radioactive phosphorus? How are they possible when radioactive elements are only those having atomic number greater than 83 and n/p ratio greater than 1.5?
Answer» What is meant by radioactive sodium or radioactive phosphorus? How are they possible when radioactive elements are only those having atomic number greater than 83 and n/p ratio greater than 1.5?

Discussion

1636.	Which of the following breeds of sheep are not commonly reared in Rajasthan?
Answer» Which of the following breeds of sheep are not commonly reared in Rajasthan?

Discussion

1637.	the temperature coefficient of a certain reaction is found to be 3 if temperature changes from 25^o to 55^o the new rate of the reaction will b
Answer» the temperature coefficient of a certain reaction is found to be 3 if temperature changes from 25^o to 55^o the new rate of the reaction will b

Discussion

1638.	Differentiate between Wildlife Santuary & Biosphere Reserve.
Answer» Differentiate between Wildlife Santuary & Biosphere Reserve.

Discussion

1639.	Which of the following is true for the electrochemical Daniel cell?
Answer» Which of the following is true for the electrochemical Daniel cell?

Discussion

1640.	From the given table for reaction between A and B: Initial rateInitial rate [A] mol litre−1[B] mol litre−1at 300 Kat 320 K mol litre−1 s−1 mol litre−1 s−1(I) 2.5×10−43.0×10−55.0×10−42.0×10−3(II)5.0×10−46.0×10−54.0×10−3−(III) 1.0×10−36.0×10−51.6×10−2−Rate constant at 300 K is x×108 mol−2 litre2 s−1. Find the value of 15x.
Answer» From the given table for reaction between A and B: $\begin{matrix} Initial rate & Initial rate [A] {mol litre}^{- 1} & [B] {mol litre}^{- 1} & at 300 K & at 320 K {mol litre}^{- 1} s^{- 1} & {mol litre}^{- 1} s^{- 1} (I) & 2.5 \times 10^{- 4} & 3.0 \times 10^{- 5} & 5.0 \times 10^{- 4} & 2.0 \times 10^{- 3} (II) & 5.0 \times 10^{- 4} & 6.0 \times 10^{- 5} & 4.0 \times 10^{- 3} & - (III) & 1.0 \times 10^{- 3} & 6.0 \times 10^{- 5} & 1.6 \times 10^{- 2} & - \end{matrix}$ Rate constant at $300 K$ is $x \times 10^{8} {mol}^{- 2} {litre}^{2} s^{- 1}$ . Find the value of $15 x$ .

Discussion

1641.	Question 2Rusting of an article made up of iron is called(a) corrosion and it is a physical as well as chemical change(b) dissolution and it is a physical change(c) corrosion and it is a chemical change(d) dissolution and it is a chemical change
Answer» Question 2 Rusting of an article made up of iron is called (a) corrosion and it is a physical as well as chemical change (b) dissolution and it is a physical change (c) corrosion and it is a chemical change (d) dissolution and it is a chemical change

Discussion

1642.	For a first order reaction, the time taken to reduce the initial concentration by a factor of 1/4 is 10 min. If the reduction in concentration is carried out by by a factor of 1/16, then time required (in min) will be(1) 10 (2) 20(3) 40(4) 60
Answer» For a first order reaction, the time taken to reduce the initial concentration by a factor of 1/4 is 10 min. If the reduction in concentration is carried out by by a factor of 1/16, then time required (in min) will be (1) 10 (2) 20 (3) 40 (4) 60

Discussion

1643.	Give reasons. (a) Water sources are formed under the surface of the earth. (b) Ground water levels are falling. (c) If we dig near river banks we find water level quickly. (d) Wet clothes become dry after some time. (e) Water is found in the solid form in the polar regions.
Answer» Give reasons. (a) Water sources are formed under the surface of the earth. (b) Ground water levels are falling. (c) If we dig near river banks we find water level quickly. (d) Wet clothes become dry after some time. (e) Water is found in the solid form in the polar regions.

1643.

Give reasons. (a) Water sources are formed under the surface of the earth. (b) Ground water levels are falling. (c) If we dig near river banks we find water level quickly. (d) Wet clothes become dry after some time. (e) Water is found in the solid form in the polar regions.

Answer»

Give reasons.

(a) Water sources are formed under the surface of the earth.

(b) Ground water levels are falling.

(c) If we dig near river banks we find water level quickly.

(d) Wet clothes become dry after some time.

(e) Water is found in the solid form in the polar regions.

Discussion

1644.	Which of the following techniques are used to create fabric from yarn?
Answer» Which of the following techniques are used to create fabric from yarn?

Discussion

1645.	Two flask A and B of equal volume contain equal masses of H2 and CH4 gases at 100 K and 200 K temperature respectively. Which of the following relation is correct about total kinetic energy (E) ?(1){(E)_{{H_2}}} = {(E)_{C{H_4}}}(2){(E)_{{H_2}}} = 2 times {(E)_{C{H_4}}}(3){(E)_{{H_2}}} = 4 times {(E)_{C{H_4}}}(4)4 times {(E)_{{H_2}}} = {(E)_{C{H_4}}}
Answer» Two flask A and B of equal volume contain equal masses of H2 and CH4 gases at 100 K and 200 K temperature respectively. Which of the following relation is correct about total kinetic energy (E) ? (1) {(E)_{{H_2}}} = {(E)_{C{H_4}}} (2) {(E)_{{H_2}}} = 2 times {(E)_{C{H_4}}} (3) {(E)_{{H_2}}} = 4 times {(E)_{C{H_4}}} (4) 4 times {(E)_{{H_2}}} = {(E)_{C{H_4}}}

Discussion

1646.	What has percentile abundance to do with the stability of an atom?
Answer» What has percentile abundance to do with the stability of an atom?

Discussion

1647.	In a diamond, every carbon atom is joint to how many carbon atoms by covalent bond?
Answer» In a diamond, every carbon atom is joint to how many carbon atoms by covalent bond?

Discussion

1648.	What is the correct formula of aluminium nitrate?
Answer» What is the correct formula of aluminium nitrate?

Discussion

1649.	why orthoproduct is formed in riemer tiemen reaction?
Answer» why orthoproduct is formed in riemer tiemen reaction?

Discussion

1650.	The hair used for making wool is called ______.
Answer» The hair used for making wool is called ______.

Discussion

Explore topic-wise InterviewSolutions in .

WHAT IS THE DIFFERENCE BETWEEN ATOMIC MASS AND ATOMIC VALENCY

what is correct order of stability of alkali metal chlorides

Clotting of blood is an example of _____ change.

What are physically Change

25. Unit of atomic mass previously

The process in which forests are converted into pastures, then into arid land and finally into deserts is known as _________.

If 0 degree Celsius is converted into Kelvin scale, then it will show___K.

How much positive and negative charge is in water molecule

For the cell reaction 2Ce4++Co→2Ce3++Co2+Eocell is 1.89 V. If EoCo2+|Co is−0.28 V, What is the value of EoCe4+|Ce3+

Discuss some characteristics of chemical changes. [3 MARKS]

Which of the following can be separated using a funnel?

Which of the following is NOT a feature of a physical change?

Which of the following is a pH range for drinking water?

The concentric square presentation below shows three ecological level of organisations on the earth.P CommunityQ BiosphereR OrganismWhich of the given best represents the relationships of these ecological levels of organisation on the earth?

Which of the following statement describes the relationship between sanitation and disease?

The indicators which reacts with acids don't reacts with base.True /false

Which among the following is combustible?

Both temporary and permanent hardness in water can be removed by the addition of washing soda. Which of the following reactions represents the removal of permanent hardness in water?

Which among the following is an exothermic reaction?

Question 3:How does a burning candle show both physical and chemical changes?

The mixture of oil and water is allowed to settle for a while. What will be our final observation?

Which of the following compounds cannot be used as an antacid during acid indigestion?

What is the difference between boiling and vaporisation ? what is the latent heat of vaporisation?

Which of the following are obtained by destructive distillation of coal?

What is a balanced chemical equation

How does the pH change when the solution of base is diluted using water?

Electrolytes find a primary application in the working of a cell. The electrolyte in the cell provides a medium for ion transport between the cathode and anode of a battery. Among the following solutions, which one would you choose as an electrolyte to maximise the efficiency of the cell?[0.8 mark]

Calculate the reduction potential for the following half cell at 25∘C: Ag(s)|Ag+(aq, 10−5 M); E0Ag+/Ag= 0.80 V

The given P−U graph shows the variation of internal energy of an ideal gas with increase in pressure. Which of the following P−V graphs is equivalent to this graph?

Explain why -(i) Oil does not mix in water. However, oil and water become homogeneous if a sufficient quantity of detergent is added.(ii) Soap cannot be used in hard water.

Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.Carbon dioxide

We can prevent ourselves from getting infected by water-borne diseases by consuming clean drinking water. Explain.

What is meant by radioactive sodium or radioactive phosphorus? How are they possible when radioactive elements are only those having atomic number greater than 83 and n/p ratio greater than 1.5?

Which of the following breeds of sheep are not commonly reared in Rajasthan?

the temperature coefficient of a certain reaction is found to be 3 if temperature changes from 25^o to 55^o the new rate of the reaction will b

Differentiate between Wildlife Santuary & Biosphere Reserve.

Which of the following is true for the electrochemical Daniel cell?

Question 2Rusting of an article made up of iron is called(a) corrosion and it is a physical as well as chemical change(b) dissolution and it is a physical change(c) corrosion and it is a chemical change(d) dissolution and it is a chemical change

For a first order reaction, the time taken to reduce the initial concentration by a factor of 1/4 is 10 min. If the reduction in concentration is carried out by by a factor of 1/16, then time required (in min) will be(1) 10 (2) 20(3) 40(4) 60

Give reasons. (a) Water sources are formed under the surface of the earth. (b) Ground water levels are falling. (c) If we dig near river banks we find water level quickly. (d) Wet clothes become dry after some time. (e) Water is found in the solid form in the polar regions.

Which of the following techniques are used to create fabric from yarn?

What has percentile abundance to do with the stability of an atom?

In a diamond, every carbon atom is joint to how many carbon atoms by covalent bond?

What is the correct formula of aluminium nitrate?

why orthoproduct is formed in riemer tiemen reaction?

The hair used for making wool is called ______.