46295 + Interview Questions in Chemistry

1.	Why is NaCl more soluble than KCl?
Answer» Why is NaCl more soluble than KCl?

Discussion

2.	Choose the hydrate which exhibit Hydrogen bonding.
Answer» Choose the hydrate which exhibit Hydrogen bonding.

Discussion

3.	In electronegativity Does a atom ATTARCT A ELECTRON OR THE ATOM GAIN IT?? IF THE ATOM ONLY ATTARCT THE ELECTRON SO DOES IT MEAN THAT ELECTRONS IS NOT ADDED IN ITS VALENCE.
Answer» In electronegativity Does a atom ATTARCT A ELECTRON OR THE ATOM GAIN IT?? IF THE ATOM ONLY ATTARCT THE ELECTRON SO DOES IT MEAN THAT ELECTRONS IS NOT ADDED IN ITS VALENCE.

Discussion

4.	4B+3O2→A 2B+N2→B A&B are as follows
Answer» $4 B + 3 O_{2} \to A$ $2 B + N_{2} \to B$ $A & B$ are as follows

4.

4B+3O2→A 2B+N2→B A&B are as follows

Answer»

$4 B + 3 O_{2} \to A$

$2 B + N_{2} \to B$

$A & B$ are as follows

Discussion

5.	EMF of the following cell is 0.634 volt at 298 K Pt\|H2 (1 atm)\|H+(aq)\|\|Hg2+2 (aq. 1 N)\|Hg(l). The pH of anode compartment is : (Given, EoHg2+2\|Hg=0.28 and 2.303RTF=0.059)
Answer» EMF of the following cell is $0.634 v o l t$ at $298 K$ $P t \| H_{2} (1 a t m) \| H^{+} (a q) \| \| H g_{2}^{2 +} (a q . 1 N) \| H g (l)$ . The pH of anode compartment is : (Given, $E_{H g_{2}^{2 +} \| H g}^{o} = 0.28 and \frac{2.303 R T}{F} = 0.059$ )

Discussion

6.	What was the significance of dual nature of matter in formulation of Quantum mechanical model of atom?
Answer» What was the significance of dual nature of matter in formulation of Quantum mechanical model of atom?

Discussion

7.	Namethe following halides according to IUPAC system and classify them asalkyl, allyl, benzyl (primary, secondary, tertiary), vinyl or arylhalides:(i) (CH3)2CHCH(Cl)CH3(ii) CH3CH2CH(CH3)CH(C2H5)Cl(iii) CH3CH2C(CH3)2CH2I(iv) (CH3)3CCH2CH(Br)C6H5(v) CH3CH(CH3)CH(Br)CH3 (vi) CH3C(C2H5)2CH2Br(vii) CH3C(Cl)(C2H5)CH2CH3(viii) CH3CH=C(Cl)CH2CH(CH3)2(ix) CH3CH=CHC(Br)(CH3)2(x) p-ClC6H4CH2CH(CH3)2(xi) m-ClCH2C6H4CH2C(CH3)3(xii) o-Br-C6H4CH(CH3)CH2CH3
Answer» Name the following halides according to IUPAC system and classify them as alkyl, allyl, benzyl (primary, secondary, tertiary), vinyl or aryl halides: (i) (CH₃)₂CHCH(Cl)CH₃ (ii) CH₃CH₂CH(CH₃)CH(C₂H₅)Cl (iii) CH₃CH₂C(CH₃)₂CH₂I (iv) (CH₃)₃CCH₂CH(Br)C₆H₅ (v) CH₃CH(CH₃)CH(Br)CH₃ (vi) CH₃C(C₂H₅)₂CH₂Br (vii) CH₃C(Cl)(C₂H₅)CH₂CH₃ (viii) CH₃CH=C(Cl)CH₂CH(CH₃)₂ (ix) CH₃CH=CHC(Br)(CH₃)₂ (x) p-ClC₆H₄CH₂CH(CH₃)₂ (xi) m-ClCH₂C₆H₄CH₂C(CH₃)₃ (xii) o-Br-C₆H₄CH(CH₃)CH₂CH₃

7.

Namethe following halides according to IUPAC system and classify them asalkyl, allyl, benzyl (primary, secondary, tertiary), vinyl or arylhalides:(i) (CH3)2CHCH(Cl)CH3(ii) CH3CH2CH(CH3)CH(C2H5)Cl(iii) CH3CH2C(CH3)2CH2I(iv) (CH3)3CCH2CH(Br)C6H5(v) CH3CH(CH3)CH(Br)CH3 (vi) CH3C(C2H5)2CH2Br(vii) CH3C(Cl)(C2H5)CH2CH3(viii) CH3CH=C(Cl)CH2CH(CH3)2(ix) CH3CH=CHC(Br)(CH3)2(x) p-ClC6H4CH2CH(CH3)2(xi) m-ClCH2C6H4CH2C(CH3)3(xii) o-Br-C6H4CH(CH3)CH2CH3

Answer»

Name
the following halides according to IUPAC system and classify them as
alkyl, allyl, benzyl (primary, secondary, tertiary), vinyl or aryl
halides:

(i)
(CH₃)₂CHCH(Cl)CH₃

(ii)
CH₃CH₂CH(CH₃)CH(C₂H₅)Cl

(iii)
CH₃CH₂C(CH₃)₂CH₂I

(iv)
(CH₃)₃CCH₂CH(Br)C₆H₅

(v)
CH₃CH(CH₃)CH(Br)CH₃

(vi)
CH₃C(C₂H₅)₂CH₂Br

(vii)
CH₃C(Cl)(C₂H₅)CH₂CH₃

(viii)
CH₃CH=C(Cl)CH₂CH(CH₃)₂

(ix) CH₃CH=CHC(Br)(CH₃)₂

(x)
p-ClC₆H₄CH₂CH(CH₃)₂

(xi)
m-ClCH₂C₆H₄CH₂C(CH₃)₃

(xii)
o-Br-C₆H₄CH(CH₃)CH₂CH₃

Discussion

8.	Cheilosis disease is caused due to the deficiency of
Answer» Cheilosis disease is caused due to the deficiency of

Discussion

9.	Vapour pressure of a solution is:
Answer» Vapour pressure of a solution is:

Discussion

10.	Glucose molecule reacts with X number of molecules of phenyl hydrazine to yield osazone. The value of X is:
Answer» Glucose molecule reacts with X number of molecules of phenyl hydrazine to yield osazone. The value of X is:

Discussion

11.	Perfecto defination of racemic mixture
Answer» Perfecto defination of racemic mixture

Discussion

12.	Calculateand compare the energy released by a) fusion of 1.0 kg of hydrogendeep within Sun and b) the fission of 1.0 kg of 235Uin a fission reactor.
Answer» Calculate and compare the energy released by a) fusion of 1.0 kg of hydrogen deep within Sun and b) the fission of 1.0 kg of ²³⁵U in a fission reactor.

Discussion

13.	Calculate the pH of a solution made by adding 0.001 mol of NaOH to 100 cm3 of solution which is 0.50 M in CH3COOH and 0.5 M in CH3COONa.
Answer» Calculate the pH of a solution made by adding $0.001 mol of N a O H to 100 {cm}^{3}$ of solution which is $0.50 M$ in $C H_{3} C O O H and 0.5 M in C H_{3} C O O N a$ .

Discussion

14.	When ethyl alcohol is heated with red phosphorus and HI, then which of the following is formed
Answer» When ethyl alcohol is heated with red phosphorus and HI, then which of the following is formed

Discussion

15.	What are triangular voids?Is these voids are formed 1D?formula for finding these voids
Answer» What are triangular voids?Is these voids are formed 1D?formula for finding these voids

Discussion

16.	In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices. (a) Assertion and reason both are correct statements and reason explains the assertion. (b) Both assertion and reason are wrong statements. (c) Assertion is correct statement and reason is wrong statement. (d) Assertion is wrong statement and reason is correct statement. (e) Assertion and reason both are correct statements but reason does not explain assertion. Assertion (A) D (+)- Glucose is dextrorotatory in nature. Reason (R) 'D' represents its dextrorotatory nature.
Answer» In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices. (a) Assertion and reason both are correct statements and reason explains the assertion. (b) Both assertion and reason are wrong statements. (c) Assertion is correct statement and reason is wrong statement. (d) Assertion is wrong statement and reason is correct statement. (e) Assertion and reason both are correct statements but reason does not explain assertion. Assertion (A) D (+)- Glucose is dextrorotatory in nature. Reason (R) 'D' represents its dextrorotatory nature.

Discussion

17.	1.0 g of magnesium is burnt with 0.56 g O2 in a closed vessel. Which reactant is left in excess and how much?(At. wt. Mg=24;O=16)
Answer» $1.0 g$ of magnesium is burnt with $0.56 g O_{2}$ in a closed vessel. Which reactant is left in excess and how much? $(At. wt. Mg = 24; O = 16)$

Discussion

18.	Which of the following options represent correct set of quantum numbers?
Answer» Which of the following options represent correct set of quantum numbers?

Discussion

19.	5. the mole ratio of sulphuric acid and hydrogen peroxide formed when H2 s2 O8 is completely hydrolysed is :- (1) 1:1 (2) 2:1 (3) 3:2 (4) 1:3
Answer» 5. the mole ratio of sulphuric acid and hydrogen peroxide formed when H2 s2 O8 is completely hydrolysed is :- (1) 1:1 (2) 2:1 (3) 3:2 (4) 1:3

Discussion

20.	calculate the number of ions , number of oxygen atom and total charge in 3 gm CO_3^{2-
Answer» calculate the number of ions , number of oxygen atom and total charge in 3 gm CO_3^{2-

Discussion

21.	6. The bond energy of B F bond in BF3 is 646 kJ/mol, while bond energy of N F bond in NF3 is 280 kJ/mol. This is because (1) N is more electronegative than B (2) Atomic mass of N is more than B (3) B F bond gets partial double bond character due to pp bond (4) N has a lone pair of electron while B does not
Answer» 6. The bond energy of B F bond in BF3 is 646 kJ/mol, while bond energy of N F bond in NF3 is 280 kJ/mol. This is because (1) N is more electronegative than B (2) Atomic mass of N is more than B (3) B F bond gets partial double bond character due to pp bond (4) N has a lone pair of electron while B does not

Discussion

22.	The enthalpy change in the reaction, 2CO + O2⟶2CO2 is termed as:
Answer» The enthalpy change in the reaction, $2 C O + O_{2} ⟶ 2 C O_{2}$ is termed as:

Discussion

23.	Bond angle in PH4+ is higher than in PH3 . why ?
Answer» Bond angle in PH4+ is higher than in PH3 . why ?

Discussion

24.	When a gas jar containing air is inverted over a gas jar containing bromine vapour, the red-brown bromine vapour diffuse into air. Explain how bromine vapour diffuse into air.
Answer» When a gas jar containing air is inverted over a gas jar containing bromine vapour, the red-brown bromine vapour diffuse into air. Explain how bromine vapour diffuse into air.

Discussion

25.	The energy required to excite 1 L of hydrogen gas at 1 atm and 298 K to the first excited state of atomic hydrogen. The energy for the dissociation of H—H bond is 436 kJ mol−1 is:
Answer» The energy required to excite $1 L$ of hydrogen gas at $1 a t m$ and $298 K$ to the first excited state of atomic hydrogen. The energy for the dissociation of $H — H$ bond is $436 k J m o l^{- 1}$ is:

Discussion

26.	&quotRate is directly proportional to stability of carbocation" in SN1 mechanism. Explain
Answer» "Rate is directly proportional to stability of carbocation" in SN1 mechanism. Explain

Discussion

27.	32.Product formed when unsaturated hydrocarbon is treated with N2H2/heat
Answer» 32.Product formed when unsaturated hydrocarbon is treated with N2H2/heat

Discussion

28.	A p-orbital can accommodate upto what number of electrons and why?
Answer» A p-orbital can accommodate upto what number of electrons and why?

Discussion

29.	8. What is carbylamine reaction?
Answer» 8. What is carbylamine reaction?

Discussion

30.	The molecular diameters of A and B are 4 nm and 8 nm respectively. The pressure of A and B are 10 atm and 5 atm respectively. The temperature of A and B are 300 K and 400 K respectively. The ratio of molecular mass of A and B is 30:40. What will be the ratio of binary collisions among A molecules to that of B molecules?
Answer» The molecular diameters of $A$ and $B$ are $4 n m$ and $8 n m$ respectively. The pressure of $A$ and $B$ are $10 a t m$ and $5 a t m$ respectively. The temperature of $A$ and $B$ are $300 K$ and $400 K$ respectively. The ratio of molecular mass of $A$ and $B$ is $30 : 40$ . What will be the ratio of binary collisions among $A$ molecules to that of $B$ molecules?

Discussion

31.	7. A:- resonance stabilizes the molecule R:- energy of resonance hybrid is less than the energy of any single Canonical structure
Answer» 7. A:- resonance stabilizes the molecule R:- energy of resonance hybrid is less than the energy of any single Canonical structure

Discussion

32.	0.1 mol of CH3NH2 (Kb=6×10−4) is added to 0.08 mol of HCl and the solution is diluted to 1 L. The hydrogen ion concentration in the solution is:
Answer» 0.1 mol of $C H_{3} N H_{2} (K_{b} = 6 \times 10^{- 4})$ is added to 0.08 mol of $H C l$ and the solution is diluted to 1 L. The hydrogen ion concentration in the solution is:

Discussion

33.	1. Which of the following should be added to 2/3 to get 11/30 ?
Answer» 1. Which of the following should be added to 2/3 to get 11/30 ?

Discussion

34.	Calculate pH of a centimolar solution of hydrochloric acid .
Answer» Calculate pH of a centimolar solution of hydrochloric acid .

Discussion

35.	why does oxygen does not have a fixedoxidation stat
Answer» why does oxygen does not have a fixedoxidation stat

Discussion

36.	what are the characteristics of a good fuel
Answer» what are the characteristics of a good fuel

Discussion

37.	What is the commonality between the antibiotic arsphenamine and azodye?
Answer» What is the commonality between the antibiotic arsphenamine and azodye?

Discussion

38.	P-V diagram of a diatomic gas is a straight line passing through origin. The molar heat capacity of gas in the process will be1) 4R2) 2.5 R3) 3R4) 4/3 R
Answer» P-V diagram of a diatomic gas is a straight line passing through origin. The molar heat capacity of gas in the process will be 1) 4R 2) 2.5 R 3) 3R 4) 4/3 R

Discussion

39.	Jese adsorption ka cause hota hai waise absorption ka bhi hota ho ga, aagar hota hai toh kya hota hai?
Answer» Jese adsorption ka cause hota hai waise absorption ka bhi hota ho ga, aagar ho ta hai toh kya hota hai?

Discussion

40.	is a polymer having monomer units ............
Answer» is a polymer having monomer units ............

40.

is a polymer having monomer units ............

Answer»

is a polymer having monomer units ............

Discussion

41.	Write a balanced chemical equation of decomposition of vegetable matter into compost.
Answer» Write a balanced chemical equation of decomposition of vegetable matter into compost.

Discussion

42.	for principle quantum number n=4 the total number of orbitals having l=3 are
Answer» for principle quantum number n=4 the total number of orbitals having l=3 are

Discussion

43.	Which of the following molecules has the largest extent of back bonding?
Answer» Which of the following molecules has the largest extent of back bonding?

Discussion

44.	Nucleic acids are the polymers of (a) nucleosides (b) nucleotides (c) bases (d) sugars
Answer» Nucleic acids are the polymers of (a) nucleosides (b) nucleotides (c) bases (d) sugars

Discussion

45.	20.The moles of lead nitrate required to produce 11.2 L oxygen at STP on its decomposition is
Answer» 20.The moles of lead nitrate required to produce 11.2 L oxygen at STP on its decomposition is

Discussion

46.	Calculate the overallcomplex dissociation equilibrium constant for the Cu(NH3)42+ion, given that β4for this complex is 2.1 × 1013.
Answer» Calculate the overall complex dissociation equilibrium constant for the Cu(NH₃)₄²⁺ ion, given that β₄ for this complex is 2.1 × 10¹³.

Discussion

47.	What volume of oxygen gas (O2) measured at 0∘C and 1 atm is needed to burn completely one litre of propane gas (C3H8) measured under the same conditions?
Answer» What volume of oxygen gas $(O_{2})$ measured at $0^{\circ} C$ and 1 atm is needed to burn completely one litre of propane gas $(C_{3} H_{8})$ measured under the same conditions?

Discussion

48.	Calculate the hydrolysis constant (Kh) of the salt containing NO2. Given the Ka for HNO2 = 4.5 × 10−10
Answer» Calculate the hydrolysis constant $(K_{h})$ of the salt containing $N O_{2}$ . Given the $K_{a}$ for $H N O_{2}$ = $4.5 \times 10^{- 10}$

48.

Calculate the hydrolysis constant (Kh) of the salt containing NO2. Given the Ka for HNO2 = 4.5 × 10−10

Answer»

Calculate the hydrolysis constant $(K_{h})$ of the salt containing $N O_{2}$ . Given the

$K_{a}$ for $H N O_{2}$ = $4.5 \times 10^{- 10}$

Discussion

49.	A PHOTON AND AN ELECTRON BOTH HAVE WAVELENGTH 1A THR RATIO OF ENERGY OF PHOTON TO THAT OF ELECTRON
Answer» A PHOTON AND AN ELECTRON BOTH HAVE WAVELENGTH 1A THR RATIO OF ENERGY OF PHOTON TO THAT OF ELECTRON

Discussion

50.	Total number of structural isomers (aldehyde and ketones) of C5H10O are:
Answer» Total number of structural isomers (aldehyde and ketones) of $C_{5} H_{10} O$ are:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Why is NaCl more soluble than KCl?

Choose the hydrate which exhibit Hydrogen bonding.

In electronegativity Does a atom ATTARCT A ELECTRON OR THE ATOM GAIN IT?? IF THE ATOM ONLY ATTARCT THE ELECTRON SO DOES IT MEAN THAT ELECTRONS IS NOT ADDED IN ITS VALENCE.

4B+3O2→A 2B+N2→B A&amp;B are as follows

EMF of the following cell is 0.634 volt at 298 K Pt|H2 (1 atm)|H+(aq)||Hg2+2 (aq. 1 N)|Hg(l). The pH of anode compartment is : (Given, EoHg2+2|Hg=0.28 and 2.303RTF=0.059)

What was the significance of dual nature of matter in formulation of Quantum mechanical model of atom?

Cheilosis disease is caused due to the deficiency of

Vapour pressure of a solution is:

Glucose molecule reacts with X number of molecules of phenyl hydrazine to yield osazone. The value of X is:

Perfecto defination of racemic mixture

Calculateand compare the energy released by a) fusion of 1.0 kg of hydrogendeep within Sun and b) the fission of 1.0 kg of 235Uin a fission reactor.

Calculate the pH of a solution made by adding 0.001 mol of NaOH to 100 cm3 of solution which is 0.50 M in CH3COOH and 0.5 M in CH3COONa.

When ethyl alcohol is heated with red phosphorus and HI, then which of the following is formed

What are triangular voids?Is these voids are formed 1D?formula for finding these voids

1.0 g of magnesium is burnt with 0.56 g O2 in a closed vessel. Which reactant is left in excess and how much?(At. wt. Mg=24;O=16)

Which of the following options represent correct set of quantum numbers?

5. the mole ratio of sulphuric acid and hydrogen peroxide formed when H2 s2 O8 is completely hydrolysed is :- (1) 1:1 (2) 2:1 (3) 3:2 (4) 1:3

calculate the number of ions , number of oxygen atom and total charge in 3 gm CO_3^{2-

The enthalpy change in the reaction, 2CO + O2⟶2CO2 is termed as:

Bond angle in PH4+ is higher than in PH3 . why ?

When a gas jar containing air is inverted over a gas jar containing bromine vapour, the red-brown bromine vapour diffuse into air. Explain how bromine vapour diffuse into air.

The energy required to excite 1 L of hydrogen gas at 1 atm and 298 K to the first excited state of atomic hydrogen. The energy for the dissociation of H—H bond is 436 kJ mol−1 is:

&quotRate is directly proportional to stability of carbocation" in SN1 mechanism. Explain

32.Product formed when unsaturated hydrocarbon is treated with N2H2/heat

A p-orbital can accommodate upto what number of electrons and why?

8. What is carbylamine reaction?

7. A:- resonance stabilizes the molecule R:- energy of resonance hybrid is less than the energy of any single Canonical structure

0.1 mol of CH3NH2 (Kb=6×10−4) is added to 0.08 mol of HCl and the solution is diluted to 1 L. The hydrogen ion concentration in the solution is:

1. Which of the following should be added to 2/3 to get 11/30 ?

Calculate pH of a centimolar solution of hydrochloric acid .

why does oxygen does not have a fixedoxidation stat

what are the characteristics of a good fuel

What is the commonality between the antibiotic arsphenamine and azodye?

P-V diagram of a diatomic gas is a straight line passing through origin. The molar heat capacity of gas in the process will be1) 4R2) 2.5 R3) 3R4) 4/3 R

Jese adsorption ka cause hota hai waise absorption ka bhi hota ho ga, aagar hota hai toh kya hota hai?

is a polymer having monomer units ............

Write a balanced chemical equation of decomposition of vegetable matter into compost.

for principle quantum number n=4 the total number of orbitals having l=3 are

Which of the following molecules has the largest extent of back bonding?

Nucleic acids are the polymers of (a) nucleosides (b) nucleotides (c) bases (d) sugars

20.The moles of lead nitrate required to produce 11.2 L oxygen at STP on its decomposition is

Calculate the overallcomplex dissociation equilibrium constant for the Cu(NH3)42+ion, given that β4for this complex is 2.1 × 1013.

What volume of oxygen gas (O2) measured at 0∘C and 1 atm is needed to burn completely one litre of propane gas (C3H8) measured under the same conditions?

Calculate the hydrolysis constant (Kh) of the salt containing NO2. Given the Ka for HNO2 = 4.5 × 10−10

A PHOTON AND AN ELECTRON BOTH HAVE WAVELENGTH 1A THR RATIO OF ENERGY OF PHOTON TO THAT OF ELECTRON

Total number of structural isomers (aldehyde and ketones) of C5H10O are:

4B+3O2→A 2B+N2→B A&B are as follows