46295 + Interview Questions in Chemistry

1.	When x molecules are removed from 200 mg of N2O, 2.89×10-3 moles of N2O are left. x will be a.1020 molecules b.1010 molecules c.1021 molecules
Answer» When x molecules are removed from 200 mg of N₂O, 2.89×10^-3 moles of N₂O are left. x will be a.10²⁰ molecules b.10¹⁰ molecules c.10²¹molecules

1.

When x molecules are removed from 200 mg of N2O, 2.89×10-3 moles of N2O are left. x will be a.1020 molecules b.1010 molecules c.1021 molecules

Answer»

When x molecules are removed from 200 mg of N₂O, 2.89×10^-3 moles of N₂O are left. x will be

a.10²⁰ molecules

b.10¹⁰ molecules

c.10²¹molecules

2.	In an experiment 0.04 Faraday of electricity passed through a solution of 400 ml of 1 molarity NaCl what would be the pH of solution after electrolysis ? please explain
Answer» In an experiment 0.04 Faraday of electricity passed through a solution of 400 ml of 1 molarity NaCl what would be the pH of solution after electrolysis ? please explain

Discussion

3.	Th e energy required to break one mol of Cl-Cl bonds in Cl2 is 242 kJmol-1. The longest wavelength of light capable of breaking a single Cl-Cl bond is A. 594nm B.640nm C. 700nm D.494nm
Answer» Th e energy required to break one mol of Cl-Cl bonds in Cl2 is 242 kJmol-1. The longest wavelength of light capable of breaking a single Cl-Cl bond is A. 594nm B.640nm C. 700nm D.494nm

3.

Th e energy required to break one mol of Cl-Cl bonds in Cl2 is 242 kJmol-1. The longest wavelength of light capable of breaking a single Cl-Cl bond is A. 594nm B.640nm C. 700nm D.494nm

Answer»

Th e energy required to break one mol of Cl-Cl bonds in Cl2 is 242 kJmol-1. The longest wavelength of light capable of breaking a single Cl-Cl bond is

A. 594nm

B.640nm

C. 700nm

D.494nm

Discussion

4.	Why is the second ionization enthalpy of group 1 elements higher than group 2 elements?
Answer» Why is the second ionization enthalpy of group 1 elements higher than group 2 elements?

Discussion

5.	ACl2/CCl4−−−−−−→BC2H5OH/KOH−−−−−−−−−−→CDHydrolysis−−−−−−→CRed Hot Fe−−−−−−−→Benzene Then the incorrect match is
Answer» $A C l_{2} / C C l_{4} - ----- \to B C_{2} H_{5} O H / K O H - --------- \to C D H y d r o l y s i s - ----- \to C R e d H o t F e - ------ \to B e n z e n e$ Then the incorrect match is

5.

ACl2/CCl4−−−−−−→BC2H5OH/KOH−−−−−−−−−−→CDHydrolysis−−−−−−→CRed Hot Fe−−−−−−−→Benzene Then the incorrect match is

Answer»

$A C l_{2} / C C l_{4} - ----- \to B C_{2} H_{5} O H / K O H - --------- \to C D H y d r o l y s i s - ----- \to C R e d H o t F e - ------ \to B e n z e n e$

Then the incorrect match is

Discussion

6.	When the conc. Of reactants are increased the equilibrium position shifts right but Kc is constant.How?
Answer» When the conc. Of reactants are increased the equilibrium position shifts right but Kc is constant.How?

Discussion

7.	Calculate the ratio between the energy of two radiation one with a wavelength of 6000 oA and the other with 2000 oA.
Answer» Calculate the ratio between the energy of two radiation one with a wavelength of 6000 $o A$ and the other with 2000 $o A$ .

Discussion

8.	In a hypothetical universe, if atomic numbers were used to form triads, which of the following will make triad with Na and K:
Answer» In a hypothetical universe, if atomic numbers were used to form triads, which of the following will make triad with Na and K:

Discussion

9.	Addition of chlorine to potassium iodide solution gives it a dark violet colour but excess chlorine makes it colourless.explain
Answer» Addition of chlorine to potassium iodide solution gives it a dark violet colour but excess chlorine makes it colourless.explain

Discussion

10.	In the experiment of photo electric effect the cathode being +'ve charged and electronic. being _'ve charged still the electron are not attracted to it and as soon we increase the _'ve potential of the battery it get attracted to it i.e., stopping potential.WHY?
Answer» In the experiment of photo electric effect the cathode being +'ve charged and electronic. being _'ve charged still the electron are not attracted to it and as soon we increase the _'ve potential of the battery it get attracted to it i.e., stopping potential.WHY?

Discussion

11.	A transition element X has the configuration [Ar]d4 in its +3 oxidation state. Its atomic number is
Answer» A transition element X has the configuration $[A r] d^{4}$ in its +3 oxidation state. Its atomic number is

Discussion

12.	Match the atomic masses of the elements: (I) K - (a) 39 (ii) Na - (b) 16 (iii) Cl - (c) 23 (iv) O - (d) 35.5
Answer» Match the atomic masses of the elements: (I) K - (a) 39 (ii) Na - (b) 16 (iii) Cl - (c) 23 (iv) O - (d) 35.5

Discussion

13.	For the given reaction which change will shift the reaction towards the product? Conversion of I2 to 2I, Enthalpy of formation at 298 K = 150 KJ. Options are, (a) increase in concentration of I2 (b) decrease in concentration of I2 (C) increase in temperature (D) increase in total pressure. Explain why?
Answer» For the given reaction which change will shift the reaction towards the product? Conversion of I₂ to 2I, Enthalpy of formation at 298 K = 150 KJ. Options are, (a) increase in concentration of I₂ (b) decrease in concentration of I2 (C) increase in temperature (D) increase in total pressure. Explain why?

Discussion

14.	How is 'Induced fit theory' different from 'Lock and key hypothesis'?
Answer» How is 'Induced fit theory' different from 'Lock and key hypothesis'?

Discussion

15.	In a complex MA3X3, unidentate ligands A and X may give:
Answer» In a complex MA₃X₃, unidentate ligands A and X may give:

Discussion

16.	What is the central atom of N2O?
Answer» What is the central atom of N₂O?

Discussion

17.	What is the difference between sigma and pi bond.
Answer» What is the difference between sigma and pi bond.

Discussion

18.	The enthalpy of vapourization of liquid is 30 kJ mol−1 and entropy of vaporization is 75 kJ/mol. The boiling point of the liquid at 1 atm is
Answer» The enthalpy of vapourization of liquid is $30 k J m o l^{- 1}$ and entropy of vaporization is $75 k J / m o l$ . The boiling point of the liquid at 1 atm is

Discussion

19.	Grams of nh4cl should be dissolved per litre of solution to have a pH of 4.96 KB for KB for NH 3 is 1.8 into 10 raise to the power minus 5
Answer» Grams of nh4cl should be dissolved per litre of solution to have a pH of 4.96 KB for KB for NH 3 is 1.8 into 10 raise to the power minus 5

Discussion

20.	Why is bivalent titanium ion paramagnetic?
Answer» Why is bivalent titanium ion paramagnetic?

Discussion

21.	If locant rule overrides lowest sum rule, then what is the use of lowest sum rule?
Answer» If locant rule overrides lowest sum rule, then what is the use of lowest sum rule?

Discussion

22.	The IUPAC name of C6H5-CO-CH2-CH3
Answer» The IUPAC name of C₆H₅-CO-CH₂-CH₃

Discussion

23.	The compounds formed when fluorine reacts with cold dil NaOH are
Answer» The compounds formed when fluorine reacts with cold dil NaOH are

Discussion

24.	Which of the following elements has greater tendency to show +2 oxidation state ?
Answer» Which of the following elements has greater tendency to show +2 oxidation state ?

Discussion

25.	An inorganic compound (A) made of two most occuring elements into the earth crust, having a polymeric tetra-headral network structure. With carbon, compound (A) produces a poisonous gas (B) which is the most stable diatomic molecule. Compounds (A) and (B) will be
Answer» An inorganic compound (A) made of two most occuring elements into the earth crust, having a polymeric tetra-headral network structure. With carbon, compound (A) produces a poisonous gas (B) which is the most stable diatomic molecule. Compounds (A) and (B) will be

Discussion

26.	The bond order of the species with orbital configuration (σ1s)2(σ∗1s)2.(σ2s)2(σ∗2s)2(σ∗2pz)1 will be
Answer» The bond order of the species with orbital configuration ( $σ$ $_{1 s}$ ) $^{2}$ ( $σ$ $^{}$ $_{1 s}$ ) $^{2}$ .( $σ$ $_{2 s}$ ) $^{2}$ ( $σ$ $^{}$ $_{2 s}$ ) $^{2}$ ( $σ$ $^{*}$ $_{2 p z}$ ) $^{1}$ will be

Discussion

27.	Pick out the odd one out from the following
Answer» Pick out the odd one out from the following

Discussion

28.	The molarity of pure water at 4∘C is
Answer» The molarity of pure water at $4^{\circ} C$ is

Discussion

29.	Pressure inside two soap bubbles are 1.01 and 1.02 atmospheres. Ratio between their volumes is
Answer» Pressure inside two soap bubbles are 1.01 and 1.02 atmospheres. Ratio between their volumes is

Discussion

30.	In an acidic fuel cell, what are the reactions involved?
Answer» In an acidic fuel cell, what are the reactions involved?

Discussion

31.	Which of the following will give a solution having pH less than 7?
Answer» Which of the following will give a solution having pH less than 7?

Discussion

32.	Catalytic hydrogenation of compound ‘X’ (C10H14) gives butyl cyclohexane. Treatment of ‘X’ with Cu(NH3)+2 gives no precipitate but does after treatment with hot NaNH2. When ‘X’ is first reacted with H2Ni2B and then oxidatively ozonized, a non resolvable compound is formed. The organic compound ‘X’ is -
Answer» Catalytic hydrogenation of compound ‘X’ $(C_{10} H_{14})$ gives butyl cyclohexane. Treatment of ‘X’ with $C u (N H_{3})_{2}^{+}$ gives no precipitate but does after treatment with hot $N a N H_{2}$ . When ‘X’ is first reacted with $\frac{H_{2}}{N i_{2} B}$ and then oxidatively ozonized, a non resolvable compound is formed. The organic compound ‘X’ is -

Discussion

33.	At S.T.P. the density of a gas X is three times that of gas Y while molecular mass of gas Y is twice that of X. The ratio of pressures of X and Y will be
Answer» At S.T.P. the density of a gas X is three times that of gas Y while molecular mass of gas Y is twice that of X. The ratio of pressures of X and Y will be

Discussion

34.	50 ml of a solution containing 10−3 mol of Ag+ is mixed with 50 ml of a 0.1 M HCl solution. How much Ag+ concentration remains in solution? (Ksp of AgCl=1.0×10−10)
Answer» 50 $m l$ of a solution containing $10^{- 3} m o l$ of $A g^{+}$ is mixed with 50 $m l$ of a 0.1 $M$ HCl solution. How much $A g^{+}$ concentration remains in solution? $(K_{s p} of A g C l = 1.0 \times 10^{- 10})$

Discussion

35.	Which of the following nuclides is positron emitter ?
Answer» Which of the following nuclides is positron emitter ?

Discussion

36.	On which of the following factors the enthalpy change of a reaction is NOT dependent?
Answer» On which of the following factors the enthalpy change of a reaction is NOT dependent?

Discussion

37.	Which of the following is starting material for the preparation of Potassium dichromate?
Answer» Which of the following is starting material for the preparation of Potassium dichromate?

Discussion

38.	The shape of CO2 molecule is:
Answer» The shape of $C O_{2}$ molecule is:

Discussion

39.	A hydrocarbon of formula C6H10 absorbs only one molecule of H2upon catalytic hydrogenation. Upon ozonolysis, the hydrocarbon yields The hydrocarbon is
Answer» A hydrocarbon of formula $C_{6} H_{10}$ absorbs only one molecule of H2upon catalytic hydrogenation. Upon ozonolysis, the hydrocarbon yields The hydrocarbon is

39.

A hydrocarbon of formula C6H10 absorbs only one molecule of H2upon catalytic hydrogenation. Upon ozonolysis, the hydrocarbon yields The hydrocarbon is

Answer»

A hydrocarbon of formula $C_{6} H_{10}$ absorbs only one molecule of H2upon catalytic hydrogenation. Upon ozonolysis, the hydrocarbon yields

The hydrocarbon is

Discussion

40.	Which of the following V – T plots represents the behavior of one mole of an ideal gas at one atmosphere?
Answer» Which of the following V – T plots represents the behavior of one mole of an ideal gas at one atmosphere?

Discussion

41.	The critical temperature of water is higher than that of O2 because H2O molecule has
Answer» The critical temperature of water is higher than that of $O_{2}$ because $H_{2} O$ molecule has

41.

The critical temperature of water is higher than that of O2 because H2O molecule has

Answer»

The critical temperature of water is higher than that of $O_{2}$ because $H_{2} O$ molecule has

Discussion

42.	Match the following crystal system with their axial angles.
Answer» Match the following crystal system with their axial angles.

Discussion

43.	The penetration power within a principal quantum number goes like
Answer» The penetration power within a principal quantum number goes like

Discussion

44.	The IUPAC name of
Answer» The IUPAC name of

Discussion

45.	Leucine is a/an ________ amino acid.
Answer» Leucine is a/an ________ amino acid.

Discussion

46.	Find the odd one out. Iron, Brick, Copper, Aluminium, Silver, Sand
Answer» Find the odd one out. Iron, Brick, Copper, Aluminium, Silver, Sand

46.

Find the odd one out. Iron, Brick, Copper, Aluminium, Silver, Sand

Answer»

Find the odd one out.
Iron, Brick, Copper, Aluminium, Silver, Sand

Discussion

47.	When K2Cr2O7 is converted to K2CrO4 the change in the oxidation state of chromium is
Answer» When $K_{2} C r_{2} O_{7}$ is converted to $K_{2} C r O_{4}$ the change in the oxidation state of chromium is

Discussion

48.	Giving examples, differentiate between ‘roasting’ and ‘calcination’.
Answer» Giving examples, differentiate between ‘roasting’ and ‘calcination’.

Discussion

49.	The main oxides formed on combustion of Li,Na and K in excess of air are, respectively:
Answer» The main oxides formed on combustion of Li,Na and K in excess of air are, respectively:

Discussion

50.	The number of products formed in the given reaction are
Answer» The number of products formed in the given reaction are

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

When x molecules are removed from 200 mg of N​​​​​​2​​​​​O, 2.89×10-3 moles of N2O are left. x will be a.1020 molecules b.1010 molecules c.1021 molecules

In an experiment 0.04 Faraday of electricity passed through a solution of 400 ml of 1 molarity NaCl what would be the pH of solution after electrolysis ? please explain

Th e energy required to break one mol of Cl-Cl bonds in Cl2 is 242 kJmol-1​​​​​​. The longest wavelength of light capable of breaking a single Cl-Cl bond ​​​​​​ is A. 594nm B.640nm C. 700nm D.494nm

Why is the second ionization enthalpy of group 1 elements higher than group 2 elements?

ACl2/CCl4−−−−−−→BC2H5OH/KOH−−−−−−−−−−→CDHydrolysis−−−−−−→CRed Hot Fe−−−−−−−→Benzene Then the incorrect match is

When the conc. Of reactants are increased the equilibrium position shifts right but Kc is constant.How?

Calculate the ratio between the energy of two radiation one with a wavelength of 6000 oA and the other with 2000 oA.

In a hypothetical universe, if atomic numbers were used to form triads, which of the following will make triad with Na and K:

Addition of chlorine to potassium iodide solution gives it a dark violet colour but excess chlorine makes it colourless.explain

In the experiment of photo electric effect the cathode being +'ve charged and electronic. being _'ve charged still the electron are not attracted to it and as soon we increase the _'ve potential of the battery it get attracted to it i.e., stopping potential.WHY?

A transition element X has the configuration [Ar]d4 in its +3 oxidation state. Its atomic number is

Match the atomic masses of the elements: (I) K - (a) 39 (ii) Na - (b) 16 (iii) Cl - (c) 23 (iv) O - (d) 35.5

How is 'Induced fit theory' different from 'Lock and key hypothesis'?

In a complex MA3X3, unidentate ligands A and X may give:

What is the central atom of N2O?

What is the difference between sigma and pi bond.

The enthalpy of vapourization of liquid is 30 kJ mol−1 and entropy of vaporization is 75 kJ/mol. The boiling point of the liquid at 1 atm is

Grams of nh4cl should be dissolved per litre of solution to have a pH of 4.96 KB for KB for NH 3 is 1.8 into 10 raise to the power minus 5

Why is bivalent titanium ion paramagnetic?

If locant rule overrides lowest sum rule, then what is the use of lowest sum rule?

The IUPAC name of C6H5-CO-CH2-CH3

The compounds formed when fluorine reacts with cold dil NaOH are

Which of the following elements has greater tendency to show +2 oxidation state ?

An inorganic compound (A) made of two most occuring elements into the earth crust, having a polymeric tetra-headral network structure. With carbon, compound (A) produces a poisonous gas (B) which is the most stable diatomic molecule. Compounds (A) and (B) will be

The bond order of the species with orbital configuration (σ1s)2(σ∗1s)2.(σ2s)2(σ∗2s)2(σ∗2pz)1 will be

Pick out the odd one out from the following

The molarity of pure water at 4∘C is

Pressure inside two soap bubbles are 1.01 and 1.02 atmospheres. Ratio between their volumes is

In an acidic fuel cell, what are the reactions involved?

Which of the following will give a solution having pH less than 7?

At S.T.P. the density of a gas X is three times that of gas Y while molecular mass of gas Y is twice that of X. The ratio of pressures of X and Y will be

50 ml of a solution containing 10−3 mol of Ag+ is mixed with 50 ml of a 0.1 M HCl solution. How much Ag+ concentration remains in solution? (Ksp of AgCl=1.0×10−10)

Which of the following nuclides is positron emitter ?

On which of the following factors the enthalpy change of a reaction is NOT dependent?

Which of the following is starting material for the preparation of Potassium dichromate?

The shape of CO2 molecule is:

A hydrocarbon of formula C6H10 absorbs only one molecule of H2upon catalytic hydrogenation. Upon ozonolysis, the hydrocarbon yields The hydrocarbon is

Which of the following V – T plots represents the behavior of one mole of an ideal gas at one atmosphere?

The critical temperature of water is higher than that of O2 because H2O molecule has

Match the following crystal system with their axial angles.

The penetration power within a principal quantum number goes like

The IUPAC name of

Leucine is a/an ________ amino acid.

Find the odd one out. Iron, Brick, Copper, Aluminium, Silver, Sand

When K2Cr2O7 is converted to K2CrO4 the change in the oxidation state of chromium is

Giving examples, differentiate between ‘roasting’ and ‘calcination’.

The main oxides formed on combustion of Li,Na and K in excess of air are, respectively:

The number of products formed in the given reaction are

When x molecules are removed from 200 mg of N2O, 2.89×10-3 moles of N2O are left. x will be a.1020 molecules b.1010 molecules c.1021 molecules

Th e energy required to break one mol of Cl-Cl bonds in Cl2 is 242 kJmol-1. The longest wavelength of light capable of breaking a single Cl-Cl bond is A. 594nm B.640nm C. 700nm D.494nm