46295 + Interview Questions in Chemistry

1.	Wavelengths of different radiations are given below: λ(A)=400 nm λ(B)=400 μm λ(C)=40 nm λ(D)=40 ∘A Arrange these radiations in the increasing order of their energies:
Answer» Wavelengths of different radiations are given below: $λ (A) = 400 nm λ (B) = 400 μ m$ $λ (C) = 40 nm λ (D) = 40 \circ A$ Arrange these radiations in the increasing order of their energies:

Discussion

2.	Tetragonal system has which of the following dimensions?
Answer» Tetragonal system has which of the following dimensions?

Discussion

3.	The reaction of white phosphorus with aqueous NaOH gives phosphine along with other Phosphorus containing compound. the reaction type and the oxidation state of phosphorus in phosphine and the other product are respectively
Answer» The reaction of white phosphorus with aqueous NaOH gives phosphine along with other Phosphorus containing compound. the reaction type and the oxidation state of phosphorus in phosphine and the other product are respectively

Discussion

4.	A balloon having a volume of 4200 m3 is filled with a gas at 27∘C, and 1 bar pressure. It weighs 700 kg. If the density of air is 1.2 kg m−3, then the pay load of the balloon is:
Answer» A balloon having a volume of $4200 m^{3}$ is filled with a gas at $27^{\circ} C, a n d 1$ bar pressure. It weighs $700 kg$ . If the density of air is $1.2 {kg m}^{- 3}$ , then the pay load of the balloon is:

Discussion

5.	Explain Be has High Ionisation enthalpy than B .
Answer» Explain Be has High Ionisation enthalpy than B .

Discussion

6.	Actinoids shows variable oxidation state.why?
Answer» Actinoids shows variable oxidation state.why?

Discussion

7.	Is depression of freezing point depends on molal concentration
Answer» Is depression of freezing point depends on molal concentration

Discussion

8.	Factors affecting the acid base titration.
Answer» Factors affecting the acid base titration.

Discussion

9.	Estimate the number of electrons in 100g of water. How much is the total negative charge on these electrons ?
Answer» Estimate the number of electrons in 100g of water. How much is the total negative charge on these electrons ?

Discussion

10.	AKOH−−−−−→C2H5OHXAZn−−−−−−−→C2H5OH/ΔY If 'A'is ethylene chloride then 'X' and 'Y' are related as
Answer» $A K O H - ---- \to C_{2} H_{5} O H X A Z n - ------ \to C_{2} H_{5} O H / Δ Y$ If 'A'is ethylene chloride then 'X' and 'Y' are related as

10.

AKOH−−−−−→C2H5OHXAZn−−−−−−−→C2H5OH/ΔY If 'A'is ethylene chloride then 'X' and 'Y' are related as

Answer»

$A K O H - ---- \to C_{2} H_{5} O H X A Z n - ------ \to C_{2} H_{5} O H / Δ Y$

If 'A'is ethylene chloride then 'X' and 'Y' are related as

Discussion

11.	SN I reaction undergoes through a carbocation intermediate as follows : R−X(aq.)Slow⇌R∗(aq.)+X−(aq.)H2O−−→fastROH(aq.)+H+(aq.) [R = t-Bu, iso-Pr, Et, Me] (X = Cl, Br, I) The correct statements are (I) The decreasing order of rate of SN 1 reaction is t-BuX > iso-PrX > EtX > MeX (II) The decreasing order of ionization energy is MeX > EtX > iso-PrX> t-BuX (III) The decreasing order of energy of activation is t-BuX > iso-PrX > EtX > MeX
Answer» $S_{N}$ I reaction undergoes through a carbocation intermediate as follows : $R - X (a q .) S l o w ⇌ R * (a q .) + X^{-} (a q .) H_{2} O - - \to f a s t R O H (a q .) + H^{+} (a q .)$ [R = t-Bu, iso-Pr, Et, Me] (X = Cl, Br, I) The correct statements are (I) The decreasing order of rate of S_N 1 reaction is t-BuX > iso-PrX > EtX > MeX (II) The decreasing order of ionization energy is MeX > EtX > iso-PrX> t-BuX (III) The decreasing order of energy of activation is t-BuX > iso-PrX > EtX > MeX

Discussion

12.	In which of the following the hydration energy is higher than the lattice energy
Answer» In which of the following the hydration energy is higher than the lattice energy

Discussion

13.	A green ball weighs 80 g and comes travelling towards you at 900 m/s. A photon of light emitted from green ball has a wavelength of 6×10−7 m. Assuming that the error in the position of ball is the same as the wavelength of its photon, calculate error in the momentum (kgm/s) of the green ball.
Answer» A green ball weighs 80 g and comes travelling towards you at 900 m/s. A photon of light emitted from green ball has a wavelength of $6 \times 10^{- 7}$ m. Assuming that the error in the position of ball is the same as the wavelength of its photon, calculate error in the momentum (kgm/s) of the green ball.

Discussion

14.	Which of the following oxides has a three dimensional structure?
Answer» Which of the following oxides has a three dimensional structure?

Discussion

15.	1023 molecules of nitrogen, argon and carbon dioxide each are confined in three closed boxes of a large fixed volume V, at the same temperature T. Knowing the molecular weights of the gases are in the order MCO2>MN2>MAr, what can you say about the pressures of the gases in each container?
Answer» $10^{23}$ molecules of nitrogen, argon and carbon dioxide each are confined in three closed boxes of a large fixed volume V, at the same temperature T. Knowing the molecular weights of the gases are in the order $M_{C O_{2}}$ > $M_{N_{2}}$ > $M_{A_{r}}$ , what can you say about the pressures of the gases in each container?

Discussion

16.	A hydrocarbon having molecular weight 70 gives a single monochloride on chlorination. How many dichlorides will be formed (including stereoisomers) on photodichlorination of the hydrocarbon?
Answer» A hydrocarbon having molecular weight 70 gives a single monochloride on chlorination. How many dichlorides will be formed (including stereoisomers) on photodichlorination of the hydrocarbon?

Discussion

17.	Colour is imparted to glass by mixing
Answer» Colour is imparted to glass by mixing

Discussion

18.	In halogens, with the increase of atomic number ...
Answer» In halogens, with the increase of atomic number ...

Discussion

19.	Which of the following is an example of reduction?
Answer» Which of the following is an example of reduction?

Discussion

20.	Species acting as both Bronsted acid and base in water is -
Answer» Species acting as both Bronsted acid and base in water is -

Discussion

21.	A complex PtCl4.5NH3 shows a molar conductance of 402 ohm−1 cm2 mol−1 in water and precipitates 3 moles of AgCl with AgNO3 solution. The formula of the complex is:
Answer» A complex $P t C l_{4} .5 N H_{3}$ shows a molar conductance of $402 {ohm}^{- 1} {cm}^{2} {mol}^{- 1}$ in water and precipitates 3 moles of $A g C l$ with $A g N O_{3}$ solution. The formula of the complex is:

Discussion

22.	Which is smallest in size
Answer» Which is smallest in size

22.

Which is smallest in size

Answer»

Which is smallest in size

Discussion

23.	o-toluic acid on reaction with $Br_2 + Fe$ gives :
Answer» o-toluic acid on reaction with $Br_2 + Fe$ gives :

Discussion

24.	Which will be the least stable resonating structure?
Answer» Which will be the least stable resonating structure?

Discussion

25.	What is the mass of silver deposited on the passage of 2 A current during the electrolysis of silver? Electrochemical equivalent of silver = 1.18×10−3 gm C−1
Answer» What is the mass of silver deposited on the passage of 2 A current during the electrolysis of silver? Electrochemical equivalent of silver = $1.18 \times 10^{- 3} g m C^{- 1}$

Discussion

26.	Which reactions shows incorrect major product ?
Answer» Which reactions shows incorrect major product ?

Discussion

27.	1% solution of Ca(NO3)2 has freezing point:
Answer» 1% solution of Ca(NO₃)₂ has freezing point:

Discussion

28.	A person adds 1.71 g of sugar in order to sweeten his tea. The number of C atoms added are (molar mass of sugar =342):
Answer» A person adds 1.71 g of sugar in order to sweeten his tea. The number of C atoms added are (molar mass of sugar =342):

Discussion

29.	Statement I : Nuclear fission is a spontaneous process i.e. there is no need of external energy supply for this to happen. Statement II : In a nuclear fission reaction the rest mass energy of the parent nucleus is more than the combined rest mass energy of two daughter fragments and neutrons.
Answer» Statement I : Nuclear fission is a spontaneous process i.e. there is no need of external energy supply for this to happen. Statement II : In a nuclear fission reaction the rest mass energy of the parent nucleus is more than the combined rest mass energy of two daughter fragments and neutrons.

Discussion

30.	What happens when baking soda is mixed with water which reaction takes place and which gas is released and why bubbles are formed
Answer» What happens when baking soda is mixed with water which reaction takes place and which gas is released and why bubbles are formed

Discussion

31.	If the radius of second Bohr's orbit of hydrogen atom is r2 then the radius of third Bohr's orbit of Be3+ ion will be:
Answer» If the radius of second Bohr's orbit of hydrogen atom is $r_{2}$ then the radius of third Bohr's orbit of $B e^{3 +}$ ion will be:

Discussion

32.	A compound formed by elements X and Y crystallizes in the cubic structure where X is at the corners of the cube and Y is at the 6 face centres if the length is 5A° estimate the density of the solid asuming atomic weight of X and Y as 60 and 90 respectively
Answer» A compound formed by elements X and Y crystallizes in the cubic structure where X is at the corners of the cube and Y is at the 6 face centres if the length is 5A° estimate the density of the solid asuming atomic weight of X and Y as 60 and 90 respectively

Discussion

33.	What will be the major product obtained in the reaction between tert butyl chloride with sodium methoxide?
Answer» What will be the major product obtained in the reaction between tert butyl chloride with sodium methoxide?

Discussion

34.	Can Hund's rule of maximum multiplicity be also called Hund's rule of maximum spin multiplicity ?
Answer» Can Hund's rule of maximum multiplicity be also called Hund's rule of maximum spin multiplicity ?

Discussion

35.	EAN of central metal in the complexes K2[Ni(CN)4],[Cu(NH3)4]SO4 and K2(PtCl6) are x, y and z respectively. Calculate the value of x+y+z5.
Answer» EAN of central metal in the complexes $K_{2} [N i (C N)_{4}], [C u (N H_{3})_{4}] S O_{4}$ and $K_{2} (P t C l_{6})$ are x, y and z respectively. Calculate the value of $\frac{x + y + z}{5}$ .

Discussion

36.	NX is produced by the following step of reactions:1. M+ X2⟶MX22. MX2+X2⟶M3X83. M3X8+N2CO3⟶NX+CO2+M3O4 How much M (metal) is consumed to produce 206g of NX. (Take atomic weight of M=56,N=23,X=80)
Answer» $N X$ is produced by the following step of reactions: 1. $M +$ $X_{2}$ $⟶$ $M X_{2}$ 2. $M X_{2}$ + $X_{2}$ $⟶$ $M_{3} X_{8}$ 3. $M_{3} X_{8}$ + $N_{2} C O_{3}$ $⟶$ $N X +$ $C O_{2}$ + $M_{3} O_{4}$ How much M (metal) is consumed to produce $206 g$ of $N X$ . (Take atomic weight of $M = 56, N = 23, X = 80$ )

36.

NX is produced by the following step of reactions:1. M+ X2⟶MX22. MX2+X2⟶M3X83. M3X8+N2CO3⟶NX+CO2+M3O4 How much M (metal) is consumed to produce 206g of NX. (Take atomic weight of M=56,N=23,X=80)

Answer»

$N X$ is produced by the following step of reactions:

1. $M +$ $X_{2}$ $⟶$ $M X_{2}$

2. $M X_{2}$ + $X_{2}$ $⟶$ $M_{3} X_{8}$

3. $M_{3} X_{8}$ + $N_{2} C O_{3}$ $⟶$ $N X +$ $C O_{2}$ + $M_{3} O_{4}$

How much M (metal) is consumed to produce $206 g$ of $N X$ . (Take atomic weight of $M = 56, N = 23, X = 80$ )

Discussion

37.	A substance X when heated with conc. H2SO4, liberates a gas which turns moist starch paper blue. The substance X is:
Answer» A substance X when heated with conc. H₂SO₄, liberates a gas which turns moist starch paper blue. The substance X is:

Discussion

38.	Isopropyl chlorideNa−−−→Ether Cl2/hv−−−−→2 mol alc. KOH−−−−−−→2 mol CH2=CH2−−−−−−→Δ The end product is:
Answer» $Isopropyl chloride N a - -- \to E t h e r C l_{2} / h v - --- \to 2 m o l a l c . K O H - ----- \to 2 m o l C H_{2} = C H_{2} - ----- \to Δ$ The end product is:

Discussion

39.	A cylinder contained 10 kg of gas at pressure 107N/m2. The quantity of gas taken out of cylinder if final pressure is 2.5×106M/m is (assume the temperature of gas is constant)
Answer» A cylinder contained 10 kg of gas at pressure $10^{7} N / m^{2} .$ The quantity of gas taken out of cylinder if final pressure is $2.5 \times 10^{6} M / m$ is (assume the temperature of gas is constant)

Discussion

40.	The reaction, is called:
Answer» The reaction, is called:

Discussion

41.	Calculate Δ G0 the equilibrium constant for the formation of NO2 from NO and O2 at 298 K NO(g)+12O2(g)↔NO2(g) Where: ΔfG∘ (NO2)=52.0kJ/molΔfG∘ (NO)=87.0kJ/molΔfG∘ (O2)=0kJ/mol
Answer» Calculate $Δ G^{0}$ the equilibrium constant for the formation of $N O_{2}$ from NO and $O_{2}$ at 298 K $N O (g) + \frac{1}{2} O_{2} (g) \leftrightarrow N O_{2} (g)$ Where: $Δ_{f} G^{\circ} (N O_{2}) = 52.0 k J / m o l Δ_{f} G^{\circ} (N O) = 87.0 k J / m o l Δ_{f} G^{\circ} (O_{2}) = 0 k J / m o l$

41.

Calculate Δ G0 the equilibrium constant for the formation of NO2 from NO and O2 at 298 K NO(g)+12O2(g)↔NO2(g) Where: ΔfG∘ (NO2)=52.0kJ/molΔfG∘ (NO)=87.0kJ/molΔfG∘ (O2)=0kJ/mol

Answer»

Calculate

$Δ G^{0}$

the equilibrium constant for the formation of $N O_{2}$ from NO and $O_{2}$ at 298 K
$N O (g) + \frac{1}{2} O_{2} (g) \leftrightarrow N O_{2} (g)$

Where:
$Δ_{f} G^{\circ} (N O_{2}) = 52.0 k J / m o l Δ_{f} G^{\circ} (N O) = 87.0 k J / m o l Δ_{f} G^{\circ} (O_{2}) = 0 k J / m o l$

Discussion

42.	When hypo solution is added to KMnO4 solution, then:
Answer» When hypo solution is added to $K M n O_{4}$ solution, then:

Discussion

43.	Cyanohydrin of which compound on hydrolysis will give lactic acid?
Answer» Cyanohydrin of which compound on hydrolysis will give lactic acid?

Discussion

44.	The specific conductance of a saturated solution of AgCl is found to be 1.86×10−6ohm−1cm−1 and that of water is 6×10−8ohm−1cm−1. The solubility of AgCl given thatλ0AgCl=(137.2 ohm−1cm−1 is ×10−5M)
Answer» The specific conductance of a saturated solution of AgCl is found to be $1.86 \times 10^{- 6} o h m^{- 1} c m^{- 1}$ and that of water is $6 \times 10^{- 8} o h m^{- 1} c m^{- 1}$ . The solubility of AgCl given that $λ_{A}^{0} g C l = (137.2 o h m^{- 1} c m^{- 1}$ is $\times 10^{- 5} M$ )

Discussion

45.	What is the difference between mass and weight and amount of substance
Answer» What is the difference between mass and weight and amount of substance

Discussion

46.	The molal elevation constant is the ratio of the elevation of boiling point to
Answer» The molal elevation constant is the ratio of the elevation of boiling point to

Discussion

47.	A non ideal solution was prepared by mixing 30 ml chloroform and 50 ml acetone. The volume of mixture will be
Answer» A non ideal solution was prepared by mixing 30 ml chloroform and 50 ml acetone. The volume of mixture will be

Discussion

48.	What is backbonding in boron? And what does it mean for?
Answer» What is backbonding in boron? And what does it mean for?

Discussion

49.	Treatment of concentrated solution of borax with calculated quantity of H2SO4 gives-
Answer» Treatment of concentrated solution of borax with calculated quantity of H2SO4 gives-

Discussion

50.	The effective atomic number of central Cu (At. No. 29) metal in [Cu(NH3)4]SO4 is
Answer» The effective atomic number of central Cu (At. No. 29) metal in $[C u (N H_{3})_{4}] S O_{4}$ is

Discussion

23.	o-toluic acid on reaction with \(Br_2 + Fe\) gives :
Answer» o-toluic acid on reaction with \(Br_2 + Fe\) gives :

Explore topic-wise InterviewSolutions in Current Affairs.

Wavelengths of different radiations are given below: λ(A)=400 nm λ(B)=400 μm λ(C)=40 nm λ(D)=40 ∘A Arrange these radiations in the increasing order of their energies:

Tetragonal system has which of the following dimensions?

The reaction of white phosphorus with aqueous NaOH gives phosphine along with other Phosphorus containing compound. the reaction type and the oxidation state of phosphorus in phosphine and the other product are respectively

A balloon having a volume of 4200 m3 is filled with a gas at 27∘C, and 1 bar pressure. It weighs 700 kg. If the density of air is 1.2 kg m−3, then the pay load of the balloon is:

Explain Be has High Ionisation enthalpy than B .

Actinoids shows variable oxidation state.why?

Is depression of freezing point depends on molal concentration

Factors affecting the acid base titration.

Estimate the number of electrons in 100g of water. How much is the total negative charge on these electrons ?

AKOH−−−−−→C2H5OHXAZn−−−−−−−→C2H5OH/ΔY If 'A'is ethylene chloride then 'X' and 'Y' are related as

In which of the following the hydration energy is higher than the lattice energy

A green ball weighs 80 g and comes travelling towards you at 900 m/s. A photon of light emitted from green ball has a wavelength of 6×10−7 m. Assuming that the error in the position of ball is the same as the wavelength of its photon, calculate error in the momentum (kgm/s) of the green ball.

Which of the following oxides has a three dimensional structure?

1023 molecules of nitrogen, argon and carbon dioxide each are confined in three closed boxes of a large fixed volume V, at the same temperature T. Knowing the molecular weights of the gases are in the order MCO2&gt;MN2&gt;MAr, what can you say about the pressures of the gases in each container?

A hydrocarbon having molecular weight 70 gives a single monochloride on chlorination. How many dichlorides will be formed (including stereoisomers) on photodichlorination of the hydrocarbon?

Colour is imparted to glass by mixing

In halogens, with the increase of atomic number ...

Which of the following is an example of reduction?

Species acting as both Bronsted acid and base in water is -

A complex PtCl4.5NH3 shows a molar conductance of 402 ohm−1 cm2 mol−1 in water and precipitates 3 moles of AgCl with AgNO3 solution. The formula of the complex is:

Which is smallest in size

o-toluic acid on reaction with \(Br_2 + Fe\) gives :

Which will be the least stable resonating structure?

What is the mass of silver deposited on the passage of 2 A current during the electrolysis of silver? Electrochemical equivalent of silver = 1.18×10−3 gm C−1

Which reactions shows incorrect major product ?

1% solution of Ca(NO3)2 has freezing point:

A person adds 1.71 g of sugar in order to sweeten his tea. The number of C atoms added are (molar mass of sugar =342):

Statement I : Nuclear fission is a spontaneous process i.e. there is no need of external energy supply for this to happen. Statement II : In a nuclear fission reaction the rest mass energy of the parent nucleus is more than the combined rest mass energy of two daughter fragments and neutrons.

What happens when baking soda is mixed with water which reaction takes place and which gas is released and why bubbles are formed

If the radius of second Bohr's orbit of hydrogen atom is r2 then the radius of third Bohr's orbit of Be3+ ion will be:

A compound formed by elements X and Y crystallizes in the cubic structure where X is at the corners of the cube and Y is at the 6 face centres if the length is 5A° estimate the density of the solid asuming atomic weight of X and Y as 60 and 90 respectively

What will be the major product obtained in the reaction between tert butyl chloride with sodium methoxide?

Can Hund's rule of maximum multiplicity be also called Hund's rule of maximum spin multiplicity ?

EAN of central metal in the complexes K2[Ni(CN)4],[Cu(NH3)4]SO4 and K2(PtCl6) are x, y and z respectively. Calculate the value of x+y+z5.

NX is produced by the following step of reactions:1. M+ X2⟶MX22. MX2+X2⟶M3X83. M3X8+N2CO3⟶NX+CO2+M3O4 How much M (metal) is consumed to produce 206g of NX. (Take atomic weight of M=56,N=23,X=80)

A substance X when heated with conc. H2SO4, liberates a gas which turns moist starch paper blue. The substance X is:

Isopropyl chlorideNa−−−→Ether Cl2/hv−−−−→2 mol alc. KOH−−−−−−→2 mol CH2=CH2−−−−−−→Δ The end product is:

A cylinder contained 10 kg of gas at pressure 107N/m2. The quantity of gas taken out of cylinder if final pressure is 2.5×106M/m is (assume the temperature of gas is constant)

The reaction, is called:

Calculate Δ G0 the equilibrium constant for the formation of NO2 from NO and O2 at 298 K NO(g)+12O2(g)↔NO2(g) Where: ΔfG∘ (NO2)=52.0kJ/molΔfG∘ (NO)=87.0kJ/molΔfG∘ (O2)=0kJ/mol

When hypo solution is added to KMnO4 solution, then:

Cyanohydrin of which compound on hydrolysis will give lactic acid?

The specific conductance of a saturated solution of AgCl is found to be 1.86×10−6ohm−1cm−1 and that of water is 6×10−8ohm−1cm−1. The solubility of AgCl given thatλ0AgCl=(137.2 ohm−1cm−1 is ×10−5M)

What is the difference between mass and weight and amount of substance

The molal elevation constant is the ratio of the elevation of boiling point to

A non ideal solution was prepared by mixing 30 ml chloroform and 50 ml acetone. The volume of mixture will be

What is backbonding in boron? And what does it mean for?

Treatment of concentrated solution of borax with calculated quantity of H2SO4 gives-

The effective atomic number of central Cu (At. No. 29) metal in [Cu(NH3)4]SO4 is

1023 molecules of nitrogen, argon and carbon dioxide each are confined in three closed boxes of a large fixed volume V, at the same temperature T. Knowing the molecular weights of the gases are in the order MCO2>MN2>MAr, what can you say about the pressures of the gases in each container?