46295 + Interview Questions in Chemistry

1.	Which of the following reactions shows nitric acid as an oxidizing agent?
Answer» Which of the following reactions shows nitric acid as an oxidizing agent?

Discussion

2.	Using cofactors of elements of third column, evaluate Δ=∣∣∣∣1xyz1yzx1zxy∣∣∣∣
Answer» Using cofactors of elements of third column, evaluate $Δ = ∣ ∣∣ ∣ \begin{matrix} 1 & x & y z 1 & y & z x 1 & z & x y \end{matrix} ∣ ∣∣ ∣$

Discussion

3.	How to find a oxidation number of the Coordinate compound?
Answer» How to find a oxidation number of the Coordinate compound?

Discussion

4.	200 ml of a gaseous mixture containing CO,CO2,N2 ON COMPLETE COMBUSTION IN JUST SUFFICIENT AMOUNT OF O2 SHOWED CONTRACTION OF 40 ML.WHEN THE RESULTING GASES WERE PASSED THROUGH KOH SOLUTION IT REDUCES BY 50% THEN CALCULATE THE VOLUME RATIO OF CO2:CO:N2 IN ORIGINAL MIXTURE
Answer» 200 ml of a gaseous mixture containing CO,CO2,N2 ON COMPLETE COMBUSTION IN JUST SUFFICIENT AMOUNT OF O2 SHOWED CONTRACTION OF 40 ML.WHEN THE RESULTING GASES WERE PASSED THROUGH KOH SOLUTION IT REDUCES BY 50% THEN CALCULATE THE VOLUME RATIO OF CO2:CO:N2 IN ORIGINAL MIXTURE

Discussion

5.	Uncertainty in the momentum of a particle 6*10power-2kg Ms-1. Calculate the uncertainty in its position
Answer» Uncertainty in the momentum of a particle 6*10power-2kg Ms-1. Calculate the uncertainty in its position

Discussion

6.	When the concentration of alkyl halide is triple and concentration of OH− is reduced to half, the rate of SN2 reaction is increased by : (correct answer +2, wrong answer -0.5)
Answer» When the concentration of alkyl halide is triple and concentration of $O H^{-}$ is reduced to half, the rate of $S_{N} 2$ reaction is increased by : (correct answer +2, wrong answer -0.5)

Discussion

7.	Which Sol is stable lyophilic or lyophobic?
Answer» Which Sol is stable lyophilic or lyophobic?

Discussion

8.	For a polybasic acid, the dissociation constants have different value for each steps, e.g., H3A⇌H++H2A−; K=Ka1 H2A−⇌H++HA2−; K=Ka2 HA2−⇌H++A3−; K=Ka3 What is the observed trend of dissociation constants in succesive stage?
Answer» For a polybasic acid, the dissociation constants have different value for each steps, e.g., $H_{3} A ⇌ H^{+} + H_{2} A^{-}; K = K_{a_{1}}$ $H_{2} A^{-} ⇌ H^{+} + H A^{2 -}; K = K_{a_{2}}$ $H A^{2 -} ⇌ H^{+} + A^{3 -}; K = K_{a_{3}}$ What is the observed trend of dissociation constants in succesive stage?

Discussion

9.	Hyper conjugation is not possible in
Answer» Hyper conjugation is not possible in

Discussion

10.	Can ketones be prepared by Jones reagent?
Answer» Can ketones be prepared by Jones reagent?

Discussion

11.	A piece of Al weighing 27 g is reacted with 200 ml of H2SO4 (specific gravity = 1.8 and 54.5% by weight) After the metal is completely dissolved 73 gm HCl is added and solution is further diluted to 500 ml solution then find the concentration of H+ ion in mol/litre.
Answer» A piece of Al weighing 27 g is reacted with 200 ml of $H_{2} S O_{4}$ (specific gravity = 1.8 and 54.5% by weight) After the metal is completely dissolved 73 gm HCl is added and solution is further diluted to 500 ml solution then find the concentration of $H^{+}$ ion in mol/litre.

Discussion

12.	When NH4NO2 and NH4NO3 are heated, gaseous products obtained are:
Answer» When $N H_{4} N O_{2}$ and $N H_{4} N O_{3}$ are heated, gaseous products obtained are:

Discussion

13.	Spiegeleisen in an alloy of:
Answer» Spiegeleisen in an alloy of:

Discussion

14.	The propene reacts with HBr to form
Answer» The propene reacts with HBr to form

Discussion

15.	In Ostwals's process for the manufacture of nitric acid, the first step involves the oxidation of ammonia gas by oxygen gas to give nitric oxide gas and steam. What is the maximum weight of nitric oxide that can be obtained starting only with 10.00 g. ammonia and 20.00 g of oxygen?
Answer» In Ostwals's process for the manufacture of nitric acid, the first step involves the oxidation of ammonia gas by oxygen gas to give nitric oxide gas and steam. What is the maximum weight of nitric oxide that can be obtained starting only with 10.00 g. ammonia and 20.00 g of oxygen?

Discussion

16.	The equivalent mass of MnSO4 is half it’s molar mass when it is converted to:
Answer» The equivalent mass of $M n S O_{4}$ is half it’s molar mass when it is converted to:

Discussion

17.	What is oxidation state?
Answer» What is oxidation state?

Discussion

18.	Adsorption is multilayered in the case of [MP PET 1999]
Answer» Adsorption is multilayered in the case of [MP PET 1999]

Discussion

19.	The standard electrode potential (E∘) for Daniel cell is + 1. 1 V. Calculate the ΔG∘ for the reaction Zn(s)+Cu2+(aq)⟶Zn2+(aq)+Cu(s) (1F=96500C mol−1).
Answer» The standard electrode potential $(E^{\circ})$ for Daniel cell is + 1. 1 V. Calculate the $Δ G^{\circ}$ for the reaction $Z n (s) + C u^{2 +} (a q) ⟶ Z n^{2 +} (a q) + C u (s)$ $(1 F = 96500 C m o l^{- 1}) .$

Discussion

20.	Match the defects given in Column I with the statements in given Column II. Column IColumn IIA.simple vacancy defect1. Shown by non−ionic solids andincreases density of the solidB.Simple interstitial defect2. Shown by ionic solids and decreasesdensity of the solidc.Frenkel defect3.Shown by non−ionic solids and densityof the solid decreasesD.Schottky defect4. Shown by ionic solids and density ofthe solid remains the same
Answer» Match the defects given in Column I with the statements in given Column II. $\begin{matrix} C o l u m n I & C o l u m n I I A . & s i m p l e v a c a n c y d e f e c t & 1. S h o w n b y n o n - i o n i c s o l i d s a n d i n c r e a s e s d e n s i t y o f t h e s o l i d B . & S i m p l e i n t e r s t i t i a l d e f e c t & 2. S h o w n b y i o n i c s o l i d s a n d d e c r e a s e s d e n s i t y o f t h e s o l i d c . & F r e n k e l d e f e c t & 3. S h o w n b y n o n - i o n i c s o l i d s a n d d e n s i t y o f t h e s o l i d d e c r e a s e s D . & S c h o t t k y d e f e c t & 4. S h o w n b y i o n i c s o l i d s a n d d e n s i t y o f t h e s o l i d r e m a i n s t h e s a m e \end{matrix}$

20.

Match the defects given in Column I with the statements in given Column II. Column IColumn IIA.simple vacancy defect1. Shown by non−ionic solids andincreases density of the solidB.Simple interstitial defect2. Shown by ionic solids and decreasesdensity of the solidc.Frenkel defect3.Shown by non−ionic solids and densityof the solid decreasesD.Schottky defect4. Shown by ionic solids and density ofthe solid remains the same

Answer»

Match the defects given in Column I with the statements in given Column II.

$\begin{matrix} C o l u m n I & C o l u m n I I A . & s i m p l e v a c a n c y d e f e c t & 1. S h o w n b y n o n - i o n i c s o l i d s a n d i n c r e a s e s d e n s i t y o f t h e s o l i d B . & S i m p l e i n t e r s t i t i a l d e f e c t & 2. S h o w n b y i o n i c s o l i d s a n d d e c r e a s e s d e n s i t y o f t h e s o l i d c . & F r e n k e l d e f e c t & 3. S h o w n b y n o n - i o n i c s o l i d s a n d d e n s i t y o f t h e s o l i d d e c r e a s e s D . & S c h o t t k y d e f e c t & 4. S h o w n b y i o n i c s o l i d s a n d d e n s i t y o f t h e s o l i d r e m a i n s t h e s a m e \end{matrix}$

Discussion

21.	High value of BOD (Biochemical Oxygen Demand) indicates that:
Answer» High value of BOD (Biochemical Oxygen Demand) indicates that:

Discussion

22.	When does or in which complex water act as strong field ligands and when weak field ligand..
Answer» When does or in which complex water act as strong field ligands and when weak field ligand..

Discussion

23.	The pH of 0.1 M solution of the following compounds increases in the order:
Answer» The pH of 0.1 M solution of the following compounds increases in the order:

Discussion

24.	Ribonuclease a mitotic poison inhibits the cell cycle in a) Interphase b) Prophase c) Metaphase d) Anaphase
Answer» Ribonuclease a mitotic poison inhibits the cell cycle in a) Interphase b) Prophase c) Metaphase d) Anaphase

24.

Ribonuclease a mitotic poison inhibits the cell cycle in a) Interphase b) Prophase c) Metaphase d) Anaphase

Answer»

Ribonuclease a mitotic poison inhibits the cell cycle in

a) Interphase

b) Prophase

c) Metaphase

d) Anaphase

Discussion

25.	Which of the following process describes removal of the adsorbed molecules from the surface on which it is adsorbed?
Answer» Which of the following process describes removal of the adsorbed molecules from the surface on which it is adsorbed?

Discussion

26.	Arrange the following in decreasing order of their atomic radii: B, O, N, F.
Answer» Arrange the following in decreasing order of their atomic radii: B, O, N, F.

Discussion

27.	What is the applications of dipole moment and vsepr theoru
Answer» What is the applications of dipole moment and vsepr theoru

Discussion

28.	When electromagnetic radiation of wavelength 300 nm falls on the surface of sodium, electrons are emitted with a kinetic energy of 1.68×105J mol−1. What is the maximum wavelength that will cause a photoelectron to be emitted?
Answer» When electromagnetic radiation of wavelength 300 nm falls on the surface of sodium, electrons are emitted with a kinetic energy of 1.68×105J mol−1. What is the maximum wavelength that will cause a photoelectron to be emitted?

Discussion

29.	The IUPAC name of the compound having the formula CH≡C−CH=CH2 is
Answer» The IUPAC name of the compound having the formula $C H \equiv C - C H = C H_{2}$ is

Discussion

30.	Which is the smaller particles and proton give me its name and tell me something about its properties...
Answer» Which is the smaller particles and proton give me its name and tell me something about its properties...

Discussion

31.	In Heisenberg's uncertainty principle The expression:∆x×∆p(>or=)h/4π or h/2π Which is correct?
Answer» In Heisenberg's uncertainty principle The expression:∆x×∆p(>or=)h/4π or h/2π Which is correct?

Discussion

32.	In the Lassaigne’s test for nitrogen in an organic compound, the Prussian blue colour is obtained due to the formation of: (a) Na4[Fe(CN)6] (b) Fe4[Fe(CN)6]3 (c) Fe2[Fe(CN)6] (d) Fe3[Fe(CN)6]4
Answer» In the Lassaigne’s test for nitrogen in an organic compound, the Prussian blue colour is obtained due to the formation of: (a) $N a_{4} [F e (C N)_{6}]$ (b) $F e_{4} [F e (C N)_{6}]^{3}$ (c) $F e_{2} [F e (C N)_{6}]$ (d) $F e_{3} [F e (C N)_{6}]_{4}$

Discussion

33.	A bulb emits light having λ=4950 ∘A. The bulb is rated as 100 watt and 15% of the energy is emitted as light. If the number of photons emitted by the bulb per second are x×1019, then x is (take Planck's constant h = 6.6×10−34 Js
Answer» A bulb emits light having $λ = 4950 \circ A$ . The bulb is rated as $100$ watt and 15% of the energy is emitted as light. If the number of photons emitted by the bulb per second are $x \times 10^{19}$ , then x is (take Planck's constant h = $6.6 \times 10^{- 34} J s$

Discussion

34.	ΔG = −177Kcal for 2Fe(s) + 32O2(g) → Fe2O3(s) and What is the Gibbs free energy of formation of Fe3O4 ?;
Answer» $Δ G = - 177 K c a l$ for $2 F e (s) + \frac{3}{2} O_{2} (g) \to F e_{2} O_{3} (s)$ and What is the Gibbs free energy of formation of $F e_{3} O_{4}$ ?;

34.

ΔG = −177Kcal for 2Fe(s) + 32O2(g) → Fe2O3(s) and What is the Gibbs free energy of formation of Fe3O4 ?;

Answer»

$Δ G = - 177 K c a l$ for $2 F e (s) + \frac{3}{2} O_{2} (g) \to F e_{2} O_{3} (s)$ and

What is the Gibbs free energy of formation of $F e_{3} O_{4}$ ?;

Discussion

35.	Identify “C” in the following reaction series : CH3CNNa−−−−−→C2H5OHAHNO2−−−−→BCu−−−→573KC
Answer» Identify “C” in the following reaction series : $C H_{3} C N N a - ---- \to C_{2} H_{5} O H A H N O_{2} - --- \to B C u - -- \to 573 K C$

Discussion

36.	In which of the following set of compounds peroxy linkage are present.
Answer» In which of the following set of compounds peroxy linkage are present.

Discussion

37.	What is the sum of protons, electrons and neutrons in the heaviest isotope of hydrogen?
Answer» What is the sum of protons, electrons and neutrons in the heaviest isotope of hydrogen?

Discussion

38.	Is magnesium hydroxide solution basic in nature?
Answer» Is magnesium hydroxide solution basic in nature?

Discussion

39.	The mass ratio of oxygen and nitrogen of a particular gaseous mixture is 1:4. The ratio of number of their molecule is
Answer» The mass ratio of oxygen and nitrogen of a particular gaseous mixture is 1:4. The ratio of number of their molecule is

Discussion

40.	What is Vander wall force ?
Answer» What is Vander wall force ?

Discussion

41.	What is the basic difference between antiseptics and disinfectants ?
Answer» What is the basic difference between antiseptics and disinfectants ?

Discussion

42.	An ideal gas is kept in a long cylindrical vessel fitted with a frictionless piston of cross-sectional area 10 cm2 and weight 1 kg. The length of the gas column in the vessel is 20 cm. The atmospheric pressure is 100 kPa. The vessel is now taken into a spaceship revolving round the earth as a satellite. The air pressure in the spaceship is maintained at 100 kPa. Find the length of the gas column in the cylinder.
Answer» An ideal gas is kept in a long cylindrical vessel fitted with a frictionless piston of cross-sectional area 10 $c m^{2}$ and weight 1 kg. The length of the gas column in the vessel is 20 cm. The atmospheric pressure is 100 kPa. The vessel is now taken into a spaceship revolving round the earth as a satellite. The air pressure in the spaceship is maintained at 100 kPa. Find the length of the gas column in the cylinder.

Discussion

43.	N atoms of a radioactive element emit n alpha particles per second. The half life of the element is
Answer» N atoms of a radioactive element emit n alpha particles per second. The half life of the element is

Discussion

44.	α1-Antitrypsin is
Answer» $α_{1}$ -Antitrypsin is

Discussion

45.	The optically active tartaric acid is named as D−(+) tartaric acid because it has a positive
Answer» The optically active tartaric acid is named as $D - (+)$ tartaric acid because it has a positive

Discussion

46.	zIllustrate by taking examples of transition elements and non-transition elements that oxidation states of elements are largely based on lectronic configuration.
Answer» zIllustrate by taking examples of transition elements and non-transition elements that oxidation states of elements are largely based on lectronic configuration.

Discussion

47.	If a=9950+10050 and b=10150, then
Answer» If $a = 99^{50} + 100^{50}$ and $b = 101^{50},$ then

Discussion

48.	The dipole moment is the highest for?
Answer» The dipole moment is the highest for?

48.

The dipole moment is the highest for?

Answer»

The dipole moment is the highest for?

Discussion

49.	Polymer formation from monomers in some cases starts by [AIEEE 2002]
Answer» Polymer formation from monomers in some cases starts by [AIEEE 2002]

Discussion

50.	In the closest packing of atom A of radius ra, the radius of atom B that can be fitted in tetrahedral void is
Answer» In the closest packing of atom A of radius r_a, the radius of atom B that can be fitted in tetrahedral void is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following reactions shows nitric acid as an oxidizing agent?

Using cofactors of elements of third column, evaluate Δ=∣∣∣∣1xyz1yzx1zxy∣∣∣∣

How to find a oxidation number of the Coordinate compound?

200 ml of a gaseous mixture containing CO,CO2,N2 ON COMPLETE COMBUSTION IN JUST SUFFICIENT AMOUNT OF O2 SHOWED CONTRACTION OF 40 ML.WHEN THE RESULTING GASES WERE PASSED THROUGH KOH SOLUTION IT REDUCES BY 50% THEN CALCULATE THE VOLUME RATIO OF CO2:CO:N2 IN ORIGINAL MIXTURE

Uncertainty in the momentum of a particle 6*10power-2kg Ms-1. Calculate the uncertainty in its position

When the concentration of alkyl halide is triple and concentration of OH− is reduced to half, the rate of SN2 reaction is increased by : (correct answer +2, wrong answer -0.5)

Which Sol is stable lyophilic or lyophobic?

For a polybasic acid, the dissociation constants have different value for each steps, e.g., H3A⇌H++H2A−; K=Ka1 H2A−⇌H++HA2−; K=Ka2 HA2−⇌H++A3−; K=Ka3 What is the observed trend of dissociation constants in succesive stage?

Hyper conjugation is not possible in

Can ketones be prepared by Jones reagent?

A piece of Al weighing 27 g is reacted with 200 ml of H2SO4 (specific gravity = 1.8 and 54.5% by weight) After the metal is completely dissolved 73 gm HCl is added and solution is further diluted to 500 ml solution then find the concentration of H+ ion in mol/litre.

When NH4NO2 and NH4NO3 are heated, gaseous products obtained are:

Spiegeleisen in an alloy of:

The propene reacts with HBr to form

In Ostwals's process for the manufacture of nitric acid, the first step involves the oxidation of ammonia gas by oxygen gas to give nitric oxide gas and steam. What is the maximum weight of nitric oxide that can be obtained starting only with 10.00 g. ammonia and 20.00 g of oxygen?

The equivalent mass of MnSO4 is half it’s molar mass when it is converted to:

What is oxidation state?

Adsorption is multilayered in the case of [MP PET 1999]

The standard electrode potential (E∘) for Daniel cell is + 1. 1 V. Calculate the ΔG∘ for the reaction Zn(s)+Cu2+(aq)⟶Zn2+(aq)+Cu(s) (1F=96500C mol−1).

High value of BOD (Biochemical Oxygen Demand) indicates that:

When does or in which complex water act as strong field ligands and when weak field ligand..

The pH of 0.1 M solution of the following compounds increases in the order:

Ribonuclease a mitotic poison inhibits the cell cycle in a) Interphase b) Prophase c) Metaphase d) Anaphase

Which of the following process describes removal of the adsorbed molecules from the surface on which it is adsorbed?

Arrange the following in decreasing order of their atomic radii: B, O, N, F.

What is the applications of dipole moment and vsepr theoru

When electromagnetic radiation of wavelength 300 nm falls on the surface of sodium, electrons are emitted with a kinetic energy of 1.68×105J mol−1. What is the maximum wavelength that will cause a photoelectron to be emitted?

The IUPAC name of the compound having the formula CH≡C−CH=CH2 is

Which is the smaller particles and proton give me its name and tell me something about its properties...

In Heisenberg's uncertainty principle The expression:∆x×∆p(>or=)h/4π or h/2π Which is correct?

In the Lassaigne’s test for nitrogen in an organic compound, the Prussian blue colour is obtained due to the formation of: (a) Na4[Fe(CN)6] (b) Fe4[Fe(CN)6]3 (c) Fe2[Fe(CN)6] (d) Fe3[Fe(CN)6]4

A bulb emits light having λ=4950 ∘A. The bulb is rated as 100 watt and 15% of the energy is emitted as light. If the number of photons emitted by the bulb per second are x×1019, then x is (take Planck's constant h = 6.6×10−34 Js

ΔG = −177Kcal for 2Fe(s) + 32O2(g) → Fe2O3(s) and What is the Gibbs free energy of formation of Fe3O4 ?;

Identify “C” in the following reaction series : CH3CNNa−−−−−→C2H5OHAHNO2−−−−→BCu−−−→573KC

In which of the following set of compounds peroxy linkage are present.

What is the sum of protons, electrons and neutrons in the heaviest isotope of hydrogen?

Is magnesium hydroxide solution basic in nature?

The mass ratio of oxygen and nitrogen of a particular gaseous mixture is 1:4. The ratio of number of their molecule is

What is Vander wall force ?

What is the basic difference between antiseptics and disinfectants ?

N atoms of a radioactive element emit n alpha particles per second. The half life of the element is

α1-Antitrypsin is

The optically active tartaric acid is named as D−(+) tartaric acid because it has a positive

zIllustrate by taking examples of transition elements and non-transition elements that oxidation states of elements are largely based on lectronic configuration.

If a=9950+10050 and b=10150, then

The dipole moment is the highest for?

Polymer formation from monomers in some cases starts by [AIEEE 2002]

In the closest packing of atom A of radius ra, the radius of atom B that can be fitted in tetrahedral void is