46295 + Interview Questions in Chemistry

1.	Which of the species is diamagnetic?
Answer» Which of the species is diamagnetic?

Discussion

2.	Potassium when heated strongly in oxygen forms:
Answer» Potassium when heated strongly in oxygen forms:

Discussion

3.	If Ka=1.8×10−5, calculate the degree of hydrolysis of 0.1 M solution of sodium acetate at 25∘C:
Answer» If $K_{a} = 1.8 \times 10^{- 5}$ , calculate the degree of hydrolysis of 0 $.1 M$ solution of sodium acetate at $25^{\circ} C$ :

Discussion

4.	Identify (W):
Answer» Identify (W):

Discussion

5.	In the chemical reaction. the compounds ‘A’ and ‘B’ respectively are
Answer» In the chemical reaction. the compounds ‘A’ and ‘B’ respectively are

Discussion

6.	What is an alkyne?
Answer» What is an alkyne?

Discussion

7.	Which of the following is largest
Answer» Which of the following is largest

7.

Which of the following is largest

Answer»

Which of the following is largest

Discussion

8.	Explain the topic titrations.
Answer» Explain the topic titrations.

Discussion

9.	Which of the following is not the condition for the complex formation?
Answer» Which of the following is not the condition for the complex formation?

Discussion

10.	Ethanol is a derivative of corn and other grains. When burned as fuel, it emits significantly lower levels of carbon monoxide, a major atmospheric pollutant, than does gasoline. For that reason, environmentalists claim that ethanol is a better source of energy than gasoline. Which of the following, if true, most strongly supports the environmentalists’ claim?
Answer» Ethanol is a derivative of corn and other grains. When burned as fuel, it emits significantly lower levels of carbon monoxide, a major atmospheric pollutant, than does gasoline. For that reason, environmentalists claim that ethanol is a better source of energy than gasoline. Which of the following, if true, most strongly supports the environmentalists’ claim?

10.

Ethanol is a derivative of corn and other grains. When burned as fuel, it emits significantly lower levels of carbon monoxide, a major atmospheric pollutant, than does gasoline. For that reason, environmentalists claim that ethanol is a better source of energy than gasoline. Which of the following, if true, most strongly supports the environmentalists’ claim?

Answer»

Ethanol is a derivative of corn and other grains. When burned as fuel, it emits significantly lower levels of carbon monoxide, a major atmospheric pollutant, than does gasoline. For that reason, environmentalists claim that ethanol is a better source of energy than gasoline.

Which of the following, if true, most strongly supports the environmentalists’ claim?

Discussion

11.	In which of the following complex ions the central metal ion is dp2 hybridized?
Answer» In which of the following complex ions the central metal ion is $d p^{2}$ hybridized?

Discussion

12.	The metal always found in free state is
Answer» The metal always found in free state is

Discussion

13.	10 dm3 of N2 gas and 10 dm3 of gas X at the same temperature contain the same number of molecules and have same mass. The gas X is:
Answer» $10 {dm}^{3}$ of $N_{2}$ gas and $10 {dm}^{3}$ of gas $X$ at the same temperature contain the same number of molecules and have same mass. The gas $X$ is:

Discussion

14.	What is the difference between DANIELL CELL,GALVANIC CELL,VOLTAIC CELL and ELECTROLYTIC CELL?
Answer» What is the difference between DANIELL CELL,GALVANIC CELL,VOLTAIC CELL and ELECTROLYTIC CELL?

Discussion

15.	The temperature inside a refrigerator is 4oC and the room temperature is 27oC. How many joules of heat will be delivered to the room for each joule of electricity consumed by the refrigerator?( Treat the refrigerator as ideal).
Answer» The temperature inside a refrigerator is 4^oC and the room temperature is 27^oC. How many joules of heat will be delivered to the room for each joule of electricity consumed by the refrigerator?( Treat the refrigerator as ideal).

Discussion

16.	400 mL of hydrogen gas at a pressure of 300 mm Hg and 200 mL of hydrogen chloride gas at a pressure of 600 mm Hg are mixed in a one litre evacuated flask. Calculate the resulting pressure (in mm Hg) of the mixture at the same temperature.
Answer» 400 mL of hydrogen gas at a pressure of 300 mm $H g$ and 200 mL of hydrogen chloride gas at a pressure of 600 mm $H g$ are mixed in a one litre evacuated flask. Calculate the resulting pressure (in $mm Hg$ ) of the mixture at the same temperature.

Discussion

17.	The number of electron pairs (ep) in ClF3 is
Answer» The number of electron pairs (ep) in $C l F_{3}$ is

Discussion

18.	In which of the following pairs of molecules,the species have identical shape but differ in hybridisation
Answer» In which of the following pairs of molecules,the species have identical shape but differ in hybridisation

18.

In which of the following pairs of molecules,the species have identical shape but differ in hybridisation

Answer»

In which of the following pairs of molecules,the species have identical shape but differ in hybridisation

Discussion

19.	Observe the following reaction and answer the following questions: The product ‘R’ is
Answer» Observe the following reaction and answer the following questions: The product ‘R’ is

19.

Observe the following reaction and answer the following questions: The product ‘R’ is

Answer»

Observe the following reaction and answer the following questions:

The product ‘R’ is

Discussion

20.	The beta particles of a radioactive metal originate from.
Answer» The beta particles of a radioactive metal originate from.

Discussion

21.	The piston shown in the figure is moved downwards such that the vapour volume is decreased by 246.3cc. How many grams of H2O is condensed? (Assume aqueous tension at 27∘C is 360 mm Hg)
Answer» The piston shown in the figure is moved downwards such that the vapour volume is decreased by 246.3cc. How many grams of $H_{2} O$ is condensed? (Assume aqueous tension at 27 $^{\circ}$ C is 360 mm Hg)

21.

The piston shown in the figure is moved downwards such that the vapour volume is decreased by 246.3cc. How many grams of H2O is condensed? (Assume aqueous tension at 27∘C is 360 mm Hg)

Answer»

The piston shown in the figure is moved downwards such that the vapour volume is decreased by 246.3cc. How many grams of $H_{2} O$ is condensed? (Assume aqueous tension at 27 $^{\circ}$ C is 360 mm Hg)

Discussion

22.	A substance which gives brick red flame and breaks down on heating to give oxygen and a brown gas is (a) magnesium nitrate (b) calcium nitrate (c) barium nitrate (d) strontium nitrate
Answer» A substance which gives brick red flame and breaks down on heating to give oxygen and a brown gas is (a) magnesium nitrate (b) calcium nitrate (c) barium nitrate (d) strontium nitrate

Discussion

23.	In the given radioactive disintegration series, 23290Th→20882Pb Calculate the value of (n+2) where value of n is number of isobars formed in this series emission of β − particles.
Answer» In the given radioactive disintegration series, $_{90}^{232} T h \to_{82}^{208} P b$ Calculate the value of (n+2) where value of n is number of isobars formed in this series emission of $β$ − particles.

Discussion

24.	The volume of air increases by 5% in its adiabatic expansion. The percentage decrease in its pressure will be
Answer» The volume of air increases by 5% in its adiabatic expansion. The percentage decrease in its pressure will be

Discussion

25.	Which of the following substances has the highest melting point?
Answer» Which of the following substances has the highest melting point?

Discussion

26.	The distance between any two I atoms in BI3 is found to be 3.46 oA. What is the covalent radius of boron. If covalent radius of I atom is 1.33 oA? (Assume all bonds are single bonds in BI3)(Given, √3=1.73, √3.99=1.99)
Answer» The distance between any two $I$ atoms in $B I_{3}$ is found to be $3.46 o A$ . What is the covalent radius of boron. If covalent radius of $I$ atom is $1.33 o A$ ? (Assume all bonds are single bonds in $B I_{3}$ ) (Given, $\sqrt{3} = 1.73, \sqrt{3} .99 = 1.99$ )

Discussion

27.	Given that EoO2/H2O=+1.23 V; EoS2O2−8/SO2−4=+2.05V; EoBr2/Br−=+1.09V; EoAu3+/Au=+1.4V. The strongest oxidizing agent is:
Answer» Given that $E_{O_{2} / H_{2} O}^{o} = + 1.23 V$ ; $E_{S_{2} O_{8}^{2 -} / S O_{4}^{2 -}}^{o} = + 2.05 V$ ; $E_{B r_{2} / B r^{-}}^{o} = + 1.09 V$ ; $E_{A u^{3 +} / A u}^{o} = + 1.4 V$ . The strongest oxidizing agent is:

Discussion

28.	The wavelength associated with a golf ball weighing 200 g and moving at a speed of 20 m/h is of the order:
Answer» The wavelength associated with a golf ball weighing 200 g and moving at a speed of 20 m/h is of the order:

Discussion

29.	Column 1: Type of structure, Column 2: Co-ordination number of cation, Column 3: Co-ordination number of anion. Column 1Column 2Column 3(I)FCC(i)12(P)4(II)Anti-Flourite(ii)6(Q)12(III)BCC(iii)8(R)8(IV)Flourite(iv)4(S)6 The only correct combination for Na2O is:
Answer» Column 1: Type of structure, Column 2: Co-ordination number of cation, Column 3: Co-ordination number of anion. $\begin{matrix} Column 1 & Column 2 & Column 3 (I) & FCC & (i) & 12 & (P) & 4 (II) & Anti-Flourite & (ii) & 6 & (Q) & 12 (III) & BCC & (iii) & 8 & (R) & 8 (IV) & Flourite & (iv) & 4 & (S) & 6 \end{matrix}$ The only correct combination for $N a_{2} O$ is:

29.

Column 1: Type of structure, Column 2: Co-ordination number of cation, Column 3: Co-ordination number of anion. Column 1Column 2Column 3(I)FCC(i)12(P)4(II)Anti-Flourite(ii)6(Q)12(III)BCC(iii)8(R)8(IV)Flourite(iv)4(S)6 The only correct combination for Na2O is:

Answer»

Column 1: Type of structure, Column 2: Co-ordination number of cation, Column 3: Co-ordination number of anion.

$\begin{matrix} Column 1 & Column 2 & Column 3 (I) & FCC & (i) & 12 & (P) & 4 (II) & Anti-Flourite & (ii) & 6 & (Q) & 12 (III) & BCC & (iii) & 8 & (R) & 8 (IV) & Flourite & (iv) & 4 & (S) & 6 \end{matrix}$

The only correct combination for $N a_{2} O$ is:

Discussion

30.	Which has the maximum atomic radius
Answer» Which has the maximum atomic radius

30.

Which has the maximum atomic radius

Answer»

Which has the maximum atomic radius

Discussion

31.	For the elementary reaction, M→N, the rate of disappearance of M increases by a factor of 8 upon doubling the concentration of M. The order of the reaction with respect to M is
Answer» For the elementary reaction, $M \to N$ , the rate of disappearance of M increases by a factor of 8 upon doubling the concentration of M. The order of the reaction with respect to M is

Discussion

32.	Copper is extracted from Copper pyrites by heating in a Bessemer converted. The method is based on the principle that
Answer» Copper is extracted from Copper pyrites by heating in a Bessemer converted. The method is based on the principle that

Discussion

33.	Why shoes, purses and leather items have silica gel pouches kept in them?
Answer» Why shoes, purses and leather items have silica gel pouches kept in them?

Discussion

34.	Is 400g of oxygen gas enough to burn 20 moles of methane completely?
Answer» Is 400g of oxygen gas enough to burn 20 moles of methane completely?

Discussion

35.	The correct order of bond length of O−O in O2, H2O2, O3 is:
Answer» The correct order of bond length of $O - O$ in $O_{2}, H_{2} O_{2}, O_{3}$ is:

Discussion

36.	What is the mass of a photon of sodium light with a wavelength of 5890∘A?(h=6.63×10−27erg s,c=3×1010cm/s)
Answer» What is the mass of a photon of sodium light with a wavelength of $5890 \circ A$ ? $(h = 6.63 \times 10^{- 27} e r g s, c = 3 \times 10^{10} c m / s)$

Discussion

37.	A ring consisting of two parts ADB and ACB of same thermal conductivity K carries an amount of heat H. The ADB part is now replaced with another metal keeping the temperatures T1 and T2 constant. The heat carried increases to 2H. What should be the conductivity of new ADB part? (Given ACBADB = 3)
Answer» A ring consisting of two parts $A D B$ and $A C B$ of same thermal conductivity $K$ carries an amount of heat $H$ . The $A D B$ part is now replaced with another metal keeping the temperatures $T_{1}$ and $T_{2}$ constant. The heat carried increases to $2 H$ . What should be the conductivity of new $A D B$ part? (Given $\frac{A C B}{A D B} = 3$ )

Discussion

38.	If NA is the Avogadro’s number, then the number of valence electrons in 4.2 g of nitride ions (N3−) is:
Answer» If $N_{A}$ is the Avogadro’s number, then the number of valence electrons in $4.2 g$ of nitride ions $(N^{3 -})$ is:

Discussion

39.	10 moles of a mixture of hydrogen and oxygen gases at a pressure of 1 atm at constant volume and temperature, react to form 3.6 g of liquid water. The pressure of the resulting mixture will be closest to
Answer» 10 moles of a mixture of hydrogen and oxygen gases at a pressure of 1 atm at constant volume and temperature, react to form 3.6 g of liquid water. The pressure of the resulting mixture will be closest to

Discussion

40.	A solution containing 2.68×10−3mol of An+ ions requires 1.608×10−3 mol of MnO−4 for the complete oxidation of An+ to AO−3 in acidic medium. What is the value of n ?
Answer» A solution containing $2.68 \times 10^{- 3} m o l$ of $A^{n +}$ ions requires $1.608 \times 10^{- 3} m o l$ of $M n O_{4}^{-}$ for the complete oxidation of $A^{n +}$ to $A O_{3}^{-}$ in acidic medium. What is the value of $n$ ?

Discussion

41.	Which carbocation is the most stable?
Answer» Which carbocation is the most stable?

Discussion

42.	Which colligative property is preferred for the molar mass determination of macromolecules?
Answer» Which colligative property is preferred for the molar mass determination of macromolecules?

Discussion

43.	The arrangement ABC . . . ABC . . . ABC . . . is referred as
Answer» The arrangement ABC . . . ABC . . . ABC . . . is referred as

Discussion

44.	Out of , which is an example of allylic halide?
Answer» Out of , which is an example of allylic halide?

Discussion

45.	Equal weights (1.00 g) of iron and sulphur are heated together and react to form FeS. What pecentage of the original weight is left unreacted ? (Fe=56 g mol−1, S=32 g mol−1) %
Answer» Equal weights (1.00 g) of iron and sulphur are heated together and react to form $F e S$ . What pecentage of the original weight is left unreacted ? $(F e = 56 g m o l^{- 1}, S = 32 g m o l^{- 1})$ %

Discussion

46.	Oxygen is 16 times heavier than hydrogen. Equal volumes of hydrogen and oxygen are mixed. The ratio of speed of sound in the mixture to that in hydrogen is
Answer» Oxygen is 16 times heavier than hydrogen. Equal volumes of hydrogen and oxygen are mixed. The ratio of speed of sound in the mixture to that in hydrogen is

Discussion

47.	Explain molar conductivity.
Answer» Explain molar conductivity.

Discussion

48.	The color of KMnO4 is due to:
Answer» The color of $K M n O_{4}$ is due to:

Discussion

49.	For a spontaneous reaction △G, equilibrium constant (K) and E∘cell will be respectively:
Answer» For a spontaneous reaction $△$ G, equilibrium constant (K) and $E_{c e l l}^{\circ}$ will be respectively:

Discussion

50.	A mole of N2H4 loses 10 mol of electrons to form a new compound Y. Assuming that all the nitrogen appears in the new compound, what is the oxidation state of nitrogen in Y? (There is no change in the oxidation number of hydrogen.)
Answer» A mole of $N_{2} H_{4}$ loses 10 mol of electrons to form a new compound Y. Assuming that all the nitrogen appears in the new compound, what is the oxidation state of nitrogen in Y? (There is no change in the oxidation number of hydrogen.)

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the species is diamagnetic?

Potassium when heated strongly in oxygen forms:

If Ka=1.8×10−5, calculate the degree of hydrolysis of 0.1 M solution of sodium acetate at 25∘C:

Identify (W):

In the chemical reaction. the compounds ‘A’ and ‘B’ respectively are

What is an alkyne?

Which of the following is largest

Explain the topic titrations.

Which of the following is not the condition for the complex formation?

In which of the following complex ions the central metal ion is dp2 hybridized?

The metal always found in free state is

10 dm3 of N2 gas and 10 dm3 of gas X at the same temperature contain the same number of molecules and have same mass. The gas X is:

What is the difference between DANIELL CELL,GALVANIC CELL,VOLTAIC CELL and ELECTROLYTIC CELL?

The temperature inside a refrigerator is 4oC and the room temperature is 27oC. How many joules of heat will be delivered to the room for each joule of electricity consumed by the refrigerator?( Treat the refrigerator as ideal).

400 mL of hydrogen gas at a pressure of 300 mm Hg and 200 mL of hydrogen chloride gas at a pressure of 600 mm Hg are mixed in a one litre evacuated flask. Calculate the resulting pressure (in mm Hg) of the mixture at the same temperature.

The number of electron pairs (ep) in ClF3 is

In which of the following pairs of molecules,the species have identical shape but differ in hybridisation

Observe the following reaction and answer the following questions: The product ‘R’ is

The beta particles of a radioactive metal originate from.

The piston shown in the figure is moved downwards such that the vapour volume is decreased by 246.3cc. How many grams of H2O is condensed? (Assume aqueous tension at 27∘C is 360 mm Hg)

A substance which gives brick red flame and breaks down on heating to give oxygen and a brown gas is (a) magnesium nitrate (b) calcium nitrate (c) barium nitrate (d) strontium nitrate

In the given radioactive disintegration series, 23290Th→20882Pb Calculate the value of (n+2) where value of n is number of isobars formed in this series emission of β − particles.

The volume of air increases by 5% in its adiabatic expansion. The percentage decrease in its pressure will be

Which of the following substances has the highest melting point?

The distance between any two I atoms in BI3 is found to be 3.46 oA. What is the covalent radius of boron. If covalent radius of I atom is 1.33 oA? (Assume all bonds are single bonds in BI3)(Given, √3=1.73, √3.99=1.99)

Given that EoO2/H2O=+1.23 V; EoS2O2−8/SO2−4=+2.05V; EoBr2/Br−=+1.09V; EoAu3+/Au=+1.4V. The strongest oxidizing agent is:

The wavelength associated with a golf ball weighing 200 g and moving at a speed of 20 m/h is of the order:

Column 1: Type of structure, Column 2: Co-ordination number of cation, Column 3: Co-ordination number of anion. Column 1Column 2Column 3(I)FCC(i)12(P)4(II)Anti-Flourite(ii)6(Q)12(III)BCC(iii)8(R)8(IV)Flourite(iv)4(S)6 The only correct combination for Na2O is:

Which has the maximum atomic radius

For the elementary reaction, M→N, the rate of disappearance of M increases by a factor of 8 upon doubling the concentration of M. The order of the reaction with respect to M is

Copper is extracted from Copper pyrites by heating in a Bessemer converted. The method is based on the principle that

Why shoes, purses and leather items have silica gel pouches kept in them?

Is 400g of oxygen gas enough to burn 20 moles of methane completely?

The correct order of bond length of O−O in O2, H2O2, O3 is:

What is the mass of a photon of sodium light with a wavelength of 5890∘A?(h=6.63×10−27erg s,c=3×1010cm/s)

A ring consisting of two parts ADB and ACB of same thermal conductivity K carries an amount of heat H. The ADB part is now replaced with another metal keeping the temperatures T1 and T2 constant. The heat carried increases to 2H. What should be the conductivity of new ADB part? (Given ACBADB = 3)

If NA is the Avogadro’s number, then the number of valence electrons in 4.2 g of nitride ions (N3−) is:

10 moles of a mixture of hydrogen and oxygen gases at a pressure of 1 atm at constant volume and temperature, react to form 3.6 g of liquid water. The pressure of the resulting mixture will be closest to

A solution containing 2.68×10−3mol of An+ ions requires 1.608×10−3 mol of MnO−4 for the complete oxidation of An+ to AO−3 in acidic medium. What is the value of n ?

Which carbocation is the most stable?

Which colligative property is preferred for the molar mass determination of macromolecules?

The arrangement ABC . . . ABC . . . ABC . . . is referred as

Out of , which is an example of allylic halide?

Equal weights (1.00 g) of iron and sulphur are heated together and react to form FeS. What pecentage of the original weight is left unreacted ? (Fe=56 g mol−1, S=32 g mol−1) %

Oxygen is 16 times heavier than hydrogen. Equal volumes of hydrogen and oxygen are mixed. The ratio of speed of sound in the mixture to that in hydrogen is

Explain molar conductivity.

The color of KMnO4 is due to:

For a spontaneous reaction △G, equilibrium constant (K) and E∘cell will be respectively:

A mole of N2H4 loses 10 mol of electrons to form a new compound Y. Assuming that all the nitrogen appears in the new compound, what is the oxidation state of nitrogen in Y? (There is no change in the oxidation number of hydrogen.)