46295 + Interview Questions in Chemistry

1.	10.What meant by coordinate bond and dative bond?
Answer» 10.What meant by coordinate bond and dative bond?

Discussion

2.	The mass of 70% H2SO4 required for the neutralization of 1 mol of NaOH is:
Answer» The mass of 70% $H_{2} S O_{4}$ required for the neutralization of $1$ mol of $N a O H$ is:

Discussion

3.	HO−CH2CH2CH2BrNa−−−−−−→Dry etherP. Identify P.
Answer» $H O - C H_{2} C H_{2} C H_{2} B r N a - ----- \to D r y e t h e r P .$ Identify P.

Discussion

4.	What is the total number of orbitals and electrons for (a) n=3 (b) l=2
Answer» What is the total number of orbitals and electrons for (a) n=3 (b) l=2

4.

What is the total number of orbitals and electrons for (a) n=3 (b) l=2

Answer»

What is the total number of orbitals and electrons for

(a) n=3

(b) l=2

Discussion

5.	Question 20 In which of the following pairs, the ions are isoelectronic ? (a) Na+,Mg2+ (b) Al3+,O− (c) Na+,O2− (d) N3−,Cl−
Answer» Question 20 In which of the following pairs, the ions are isoelectronic ? (a) $N a^{+}, M g^{2 +}$ (b) $A l^{3 +}, O^{-}$ (c) $N a^{+}, O^{2 -}$ (d) $N^{3 -}, C l^{-}$

5.

Question 20 In which of the following pairs, the ions are isoelectronic ? (a) Na+,Mg2+ (b) Al3+,O− (c) Na+,O2− (d) N3−,Cl−

Answer»

Question 20

In which of the following pairs, the ions are isoelectronic ?

(a) $N a^{+}, M g^{2 +}$ (b) $A l^{3 +}, O^{-}$ (c) $N a^{+}, O^{2 -}$ (d) $N^{3 -}, C l^{-}$

Discussion

6.	Observe the follwoing laboratory tests for α−D− (+) glucose and mention +ve or -ve from the code given below.
Answer» Observe the follwoing laboratory tests for $α - D - (+)$ glucose and mention +ve or -ve from the code given below.

Discussion

7.	In a solid lattice, cation and an anion both have left lattice site. The lattice defect is known as
Answer» In a solid lattice, cation and an anion both have left lattice site. The lattice defect is known as

Discussion

8.	The double bond equivalence of the product formed in the above reaction is
Answer» The double bond equivalence of the product formed in the above reaction is

Discussion

9.	H2SO4 cannot be used to prepare HBr from NaBr as it
Answer» $H_{2} S O_{4}$ cannot be used to prepare HBr from NaBr as it

Discussion

10.	a) what is lattice energy?b) what is lattice enthalpy in the formation of ionic bond?c) how packing of ions of opposite charges occur to form ionic solid?
Answer» a) what is lattice energy? b) what is lattice enthalpy in the formation of ionic bond? c) how packing of ions of opposite charges occur to form ionic solid?

Discussion

11.	A long metallic bar is carrying heat from one of its ends to the other end under steady-state. The variation of temperature T along the length x of the bar from its hot end is best described by which of the following figures ?
Answer» A long metallic bar is carrying heat from one of its ends to the other end under steady-state. The variation of temperature $T$ along the length $x$ of the bar from its hot end is best described by which of the following figures ?

Discussion

12.	Classify the following species into Lewis acids and Lewis bases and show how these act as Lewis acid/base: (a) OH– (b) F– (c) H+ (d) BCl3.
Answer» Classify the following species into Lewis acids and Lewis bases and show how these act as Lewis acid/base: (a) OH^– (b) F^– (c) H⁺ (d) BCl₃.

Discussion

13.	Maximum covalenxy of 3A group
Answer» Maximum covalenxy of 3A group

Discussion

14.	CH3−O\|\|C−CH2−CH3CH2N2→A(major)CH3CO3H→B( major) Product B is:
Answer» $C H_{3} - O \| \| C - C H_{2} - C H_{3} C H_{2} N_{2} \to A (major) C H_{3} C O_{3} H \to B ( major)$ Product B is:

Discussion

15.	Why do we use meta para ortho in physical chemistry?
Answer» Why do we use meta para ortho in physical chemistry?

Discussion

16.	calculate the index of refraction of a liquid from the following into glass: (a) reading for the bottom of an empty beaker : 11.324cm (b) reading for the bottom of the beaker, when partially filled with the liquid : 11.802cm (c) reading for the upper level of the liquid in the beaker : 12.895cm
Answer» calculate the index of refraction of a liquid from the following into glass: (a) reading for the bottom of an empty beaker : 11.324cm (b) reading for the bottom of the beaker, when partially filled with the liquid : 11.802cm (c) reading for the upper level of the liquid in the beaker : 12.895cm

Discussion

17.	What are food storage polysaccharides?
Answer» What are food storage polysaccharides?

Discussion

18.	In the following reaction sequence, What are the correct structures of E, F and G?
Answer» In the following reaction sequence, What are the correct structures of E, F and G?

Discussion

19.	Which of the following species is not isostructural with SiCl4?
Answer» Which of the following species is not isostructural with $S i C l_{4}$ ?

Discussion

20.	The compressibility factor for a real gas at high pressure is ____.
Answer» The compressibility factor for a real gas at high pressure is ____.

Discussion

21.	Prove that 2+√7 is an irriational no.
Answer» Prove that 2+√7 is an irriational no.

Discussion

22.	why do sometimes alcohol reacts with bases to form metal alkoxide?
Answer» why do sometimes alcohol reacts with bases to form metal alkoxide?

Discussion

23.	10. which of following statement are correct A-:The formula n(n-1)/2 is used to determine the total number of spectral lines for H-atom wher electron jumps from any higher orbit to any lower orbit R -:The number of lines in any spectral series is determined by (n2 + n,)
Answer» 10. which of following statement are correct A-:The formula n(n-1)/2 is used to determine the total number of spectral lines for H-atom wher electron jumps from any higher orbit to any lower orbit R -:The number of lines in any spectral series is determined by (n2 + n,)

Discussion

24.	53.Predict the Correct order of negative electron gain enthalpy of F,O,Se,S with detailed explanation.
Answer» 53.Predict the Correct order of negative electron gain enthalpy of F,O,Se,S with detailed explanation.

Discussion

25.	ntnttntttntttt ntttttThe standard reduction potential of Ag+\|Ag is 0.800 V at 25^°C. Its electrode potential in a solution containing 103M ion of Ag+ions is:-ntttnttntnn ntnttntttnttttnttttt(1)nttttnttttt0.623 Vntttntttnttttnttttt(2)nttttnttttt0.977 Vntttntttnttttnttttt(3)nttttnttttt0.892 Vntttntttnttttnttttt(4)nttttnttttt1.246 Vntttnttntnn ntn
Answer» ntnttntttntttt ntttttThe standard reduction potential of Ag+\|Ag is 0.800 V at 25^°C. Its electrode potential in a solution containing 103M ion of Ag+ions is:-ntttnttntnn ntnttntttnttttnttttt(1)nttttnttttt0.623 Vntttntttnttttnttttt(2)nttttnttttt0.977 Vntttntttnttttnttttt(3)nttttnttttt0.892 Vntttntttnttttnttttt(4)nttttnttttt1.246 Vntttnttntnn ntn

Discussion

26.	The Ksp of Ag2CrO4,AgCl,AgBr and AgI are respectively, 1.1×10−12,1.8×10−10,5.0×10−13,8.3×10−17. Which one of the following salts will precipitate last if AgNO3 solution is added to the solution containing equal moles of NaCl, NaBr, Nal and Na2CrO4?
Answer» The $K_{s p}$ of $A g_{2} C r O_{4}, A g C l, A g B r$ and AgI are respectively, $1.1 \times 10^{- 12}, 1.8 \times 10^{- 10}, 5.0 \times 10^{- 13}, 8.3 \times 10^{- 17}$ . Which one of the following salts will precipitate last if $A g N O_{3}$ solution is added to the solution containing equal moles of NaCl, NaBr, Nal and $N a_{2} C r O_{4}$ ?

Discussion

27.	Methylation of diborane gives (Me = methyl group)
Answer» Methylation of diborane gives (Me = methyl group)

Discussion

28.	The molecular formula of diphenyl methane, How many structural isomers are possible when one of the hydrogens is replaced by a chlorine atom
Answer» The molecular formula of diphenyl methane, How many structural isomers are possible when one of the hydrogens is replaced by a chlorine atom

28.

The molecular formula of diphenyl methane, How many structural isomers are possible when one of the hydrogens is replaced by a chlorine atom

Answer»

The molecular formula of diphenyl methane,

How many structural isomers are possible when one of the hydrogens is replaced by a chlorine atom

Discussion

29.	Distance between any two consecutive layers in cubic close packing is (a : edge length of cubic unit cell
Answer» Distance between any two consecutive layers in cubic close packing is (a : edge length of cubic unit cell

Discussion

30.	a certain peice of cu is to be shaped into a conductor of min resis†an ce its length and diametrer shoiuld respectively be
Answer» a certain peice of cu is to be shaped into a conductor of min resis†an ce its length and diametrer shoiuld respectively be

Discussion

31.	What is electric field intensity.Its formula and explanation of it
Answer» What is electric field intensity.Its formula and explanation of it

Discussion

32.	In a set reaction, acetic acid yields a product S. The compound S would be:CH3COOHSOCl2−−−−→PBenzene−−−−−−−→Anhy. AlCl3QHCN−−−→RH3O+−−−→
Answer» In a set reaction, acetic acid yields a product S. The compound S would be: $C H_{3} C O O H S O C l_{2} - --- \to P Benzene - ------ \to A n h y . A l C l_{3} Q H C N - -- \to R H_{3} O^{+} - -- \to$

Discussion

33.	Differences between ORBIT & ORBITAL?
Answer» Differences between ORBIT & ORBITAL?

Discussion

34.	1.12 litre dry chlorine at S.T.P. was passed over a heated metal when 5.56 g chloride of the metal was formed. What is the equivalent weight of the metal ?
Answer» 1.12 litre dry chlorine at S.T.P. was passed over a heated metal when 5.56 g chloride of the metal was formed. What is the equivalent weight of the metal ?

Discussion

35.	Sucrose solution which is 40% by mass is heated till it becomes 50% by mass. Water lost from 100 g of the solution is (a) 10g (b) 15g (c) 20g (d) 25
Answer» Sucrose solution which is 40% by mass is heated till it becomes 50% by mass. Water lost from 100 g of the solution is (a) 10g (b) 15g (c) 20g (d) 25

Discussion

36.	18. when copper sulphate is added to a solution of ammonia a)freezing point is lowered b)freezing point is raised c) boiling point is raised d)both a and c
Answer» 18. when copper sulphate is added to a solution of ammonia a)freezing point is lowered b)freezing point is raised c) boiling point is raised d)both a and c

Discussion

37.	ΔHvap=30 kJ/mol and ΔSvap=75 J mol−1 K−1. Find the temperature of vapour, at one atmosphere:
Answer» $Δ H_{v a p} = 30 kJ/mol$ and $Δ S_{v a p} = 75 {J mol}^{- 1} K^{- 1}$ . Find the temperature of vapour, at one atmosphere:

Discussion

38.	Identify the type of reaction in the given images:
Answer» Identify the type of reaction in the given images:

Discussion

39.	The orbital diagram in which the Aufbau principle is violated is:
Answer» The orbital diagram in which the Aufbau principle is violated is:

Discussion

40.	Which one of the following structures represents the neoprene polymer ?
Answer» Which one of the following structures represents the neoprene polymer ?

Discussion

41.	Following type ofnom-ionic detergents are present in liquid detergents, emulsifyingagents and wetting agents. Label the hydrophilic and hydrophobicparts in the molecule. Identify the functional group (s) present inthe molecule.
Answer» Following type of nom-ionic detergents are present in liquid detergents, emulsifying agents and wetting agents. Label the hydrophilic and hydrophobic parts in the molecule. Identify the functional group (s) present in the molecule.

41.

Following type ofnom-ionic detergents are present in liquid detergents, emulsifyingagents and wetting agents. Label the hydrophilic and hydrophobicparts in the molecule. Identify the functional group (s) present inthe molecule.

Answer»

Following type of
nom-ionic detergents are present in liquid detergents, emulsifying
agents and wetting agents. Label the hydrophilic and hydrophobic
parts in the molecule. Identify the functional group (s) present in
the molecule.

Discussion

42.	10 volumes of hydrogen peroxide has a strenght of approximately:a. 3%b. 30%c. 10%d. 5%
Answer» 10 volumes of hydrogen peroxide has a strenght of approximately: a. 3% b. 30% c. 10% d. 5%

Discussion

43.	Calculate the order for the sodium crystal whose spacing is d=3 Angstrom, and longest wavelength required is 1.5 Angstrom.
Answer» Calculate the order for the sodium crystal whose spacing is $d = 3 Angstrom$ , and longest wavelength required is $1.5 Angstrom$ .

Discussion

44.	The bulk modulus of water is 3×10^9 N/m^2. The extra pressure required to inrease the density of water by 0.2 % is (1) 1.5×10^6 N/m^2 (2) 3×10^{6 }N/m^2 (3) 2/3 × 10^6 N/m^2 (4) 6×10^6 N/m^2
Answer» The bulk modulus of water is 3×10^9 N/m^2. The extra pressure required to inrease the density of water by 0.2 % is (1) 1.5×10^6 N/m^2 (2) 3×10^{6 }N/m^2 (3) 2/3 × 10^6 N/m^2 (4) 6×10^6 N/m^2

Discussion

45.	8. The no of faraday required to produce one mole of H20 from hydrogen oxygen fuel cell containing aquaeous alkali as electrolyte is 1)1 2)3 3)2 4)4
Answer» 8. The no of faraday required to produce one mole of H20 from hydrogen oxygen fuel cell containing aquaeous alkali as electrolyte is 1)1 2)3 3)2 4)4

Discussion

46.	An alloy of copper, silver and Gold is found to have copper constituting the ccp lattice. If silver atoms occupy the edge centres and Gold is present at body centre, the alloy will have the formula:
Answer» An alloy of copper, silver and Gold is found to have copper constituting the ccp lattice. If silver atoms occupy the edge centres and Gold is present at body centre, the alloy will have the formula:

Discussion

47.	Fromthe rate expression for the following reactions, determine theirorder of reaction and the dimensions of the rate constants.(i) 3 NO(g) →N2O(g) Rate= k[NO]2(ii) H2O2(aq) + 3I−(aq) + 2H+→ 2 H2O(l) + Rate = k[H2O2][I−](iii) CH3CHO(g)→ CH4(g)+ CO(g) Rate = k[CH3CHO]3/2(iv) C2H5Cl(g)→ C2H4(g)+ HCl(g) Rate = k[C2H5Cl]
Answer» From the rate expression for the following reactions, determine their order of reaction and the dimensions of the rate constants. (i) 3 NO(g) → N₂O(g) Rate = k[NO]² (ii) H₂O₂(aq) + 3 I⁻(aq) + 2 H⁺ → 2 H₂O (l) + Rate = k[H₂O₂][I⁻] (iii) CH₃CHO(g) → CH₄(g) + CO(g) Rate = k [CH₃CHO]^3/2 (iv) C₂H₅Cl(g) → C₂H₄(g) + HCl(g) Rate = k [C₂H₅Cl]

47.

Fromthe rate expression for the following reactions, determine theirorder of reaction and the dimensions of the rate constants.(i) 3 NO(g) →N2O(g) Rate= k[NO]2(ii) H2O2(aq) + 3I−(aq) + 2H+→ 2 H2O(l) + Rate = k[H2O2][I−](iii) CH3CHO(g)→ CH4(g)+ CO(g) Rate = k[CH3CHO]3/2(iv) C2H5Cl(g)→ C2H4(g)+ HCl(g) Rate = k[C2H5Cl]

Answer»

From
the rate expression for the following reactions, determine their
order of reaction and the dimensions of the rate constants.

(i)
3 NO(g) →
N₂O(g) Rate
= k[NO]²

(ii)
H₂O₂(aq) + 3
I⁻(aq) + 2
H⁺
→ 2 H₂O
(l) +

Rate = k[H₂O₂][I⁻]

(iii)
CH₃CHO(g)
→ CH₄(g)
+ CO(g) Rate = k
[CH₃CHO]^3/2

(iv)
C₂H₅Cl(g)
→ C₂H₄(g)
+ HCl(g) Rate = k
[C₂H₅Cl]

Discussion

48.	a first order reaction is 80% completed in 10 minutes . fin specific reaction rate constant per second
Answer» a first order reaction is 80% completed in 10 minutes . fin specific reaction rate constant per second

Discussion

49.	A hydrogen atom is in ground state. In order to get six lines in its emission spectrum, wavelength of incident radiation should be(Take: hc=12425 eV˙A)
Answer» A hydrogen atom is in ground state. In order to get six lines in its emission spectrum, wavelength of incident radiation should be $(Take: h c = 12425 eV ˙ A)$

Discussion

50.	The average oxidation state of Sulphur in Sodium Thiosulphate is +___.
Answer» The average oxidation state of Sulphur in Sodium Thiosulphate is +___.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

10.What meant by coordinate bond and dative bond?

The mass of 70% H2SO4 required for the neutralization of 1 mol of NaOH is:

HO−CH2CH2CH2BrNa−−−−−−→Dry etherP. Identify P.

What is the total number of orbitals and electrons for (a) n=3 (b) l=2

Question 20 In which of the following pairs, the ions are isoelectronic ? (a) Na+,Mg2+ (b) Al3+,O− (c) Na+,O2− (d) N3−,Cl−

Observe the follwoing laboratory tests for α−D− (+) glucose and mention +ve or -ve from the code given below.

In a solid lattice, cation and an anion both have left lattice site. The lattice defect is known as

The double bond equivalence of the product formed in the above reaction is

H2SO4 cannot be used to prepare HBr from NaBr as it

a) what is lattice energy?b) what is lattice enthalpy in the formation of ionic bond?c) how packing of ions of opposite charges occur to form ionic solid?

A long metallic bar is carrying heat from one of its ends to the other end under steady-state. The variation of temperature T along the length x of the bar from its hot end is best described by which of the following figures ?

Classify the following species into Lewis acids and Lewis bases and show how these act as Lewis acid/base: (a) OH– (b) F– (c) H+ (d) BCl3.

Maximum covalenxy of 3A group

CH3−O||C−CH2−CH3CH2N2→A(major)CH3CO3H→B( major) Product B is:

Why do we use meta para ortho in physical chemistry?

calculate the index of refraction of a liquid from the following into glass: (a) reading for the bottom of an empty beaker : 11.324cm (b) reading for the bottom of the beaker, when partially filled with the liquid : 11.802cm (c) reading for the upper level of the liquid in the beaker : 12.895cm

What are food storage polysaccharides?

In the following reaction sequence, What are the correct structures of E, F and G?

Which of the following species is not isostructural with SiCl4?

The compressibility factor for a real gas at high pressure is ____.

Prove that 2+√7 is an irriational no.

why do sometimes alcohol reacts with bases to form metal alkoxide?

10. which of following statement are correct A-:The formula n(n-1)/2 is used to determine the total number of spectral lines for H-atom wher electron jumps from any higher orbit to any lower orbit R -:The number of lines in any spectral series is determined by (n2 + n,)

53.Predict the Correct order of negative electron gain enthalpy of F,O,Se,S with detailed explanation.

The Ksp of Ag2CrO4,AgCl,AgBr and AgI are respectively, 1.1×10−12,1.8×10−10,5.0×10−13,8.3×10−17. Which one of the following salts will precipitate last if AgNO3 solution is added to the solution containing equal moles of NaCl, NaBr, Nal and Na2CrO4?

Methylation of diborane gives (Me = methyl group)

The molecular formula of diphenyl methane, How many structural isomers are possible when one of the hydrogens is replaced by a chlorine atom

Distance between any two consecutive layers in cubic close packing is (a : edge length of cubic unit cell

a certain peice of cu is to be shaped into a conductor of min resis†an ce its length and diametrer shoiuld respectively be

What is electric field intensity.Its formula and explanation of it

In a set reaction, acetic acid yields a product S. The compound S would be:CH3COOHSOCl2−−−−→PBenzene−−−−−−−→Anhy. AlCl3QHCN−−−→RH3O+−−−→

Differences between ORBIT & ORBITAL?

1.12 litre dry chlorine at S.T.P. was passed over a heated metal when 5.56 g chloride of the metal was formed. What is the equivalent weight of the metal ?

Sucrose solution which is 40% by mass is heated till it becomes 50% by mass. Water lost from 100 g of the solution is (a) 10g (b) 15g (c) 20g (d) 25

18. when copper sulphate is added to a solution of ammonia a)freezing point is lowered b)freezing point is raised c) boiling point is raised d)both a and c

ΔHvap=30 kJ/mol and ΔSvap=75 J mol−1 K−1. Find the temperature of vapour, at one atmosphere:

Identify the type of reaction in the given images:

The orbital diagram in which the Aufbau principle is violated is:

Which one of the following structures represents the neoprene polymer ?

Following type ofnom-ionic detergents are present in liquid detergents, emulsifyingagents and wetting agents. Label the hydrophilic and hydrophobicparts in the molecule. Identify the functional group (s) present inthe molecule.

10 volumes of hydrogen peroxide has a strenght of approximately:a. 3%b. 30%c. 10%d. 5%

Calculate the order for the sodium crystal whose spacing is d=3 Angstrom, and longest wavelength required is 1.5 Angstrom.

The bulk modulus of water is 3×10^9 N/m^2. The extra pressure required to inrease the density of water by 0.2 % is (1) 1.5×10^6 N/m^2 (2) 3×10^{6 }N/m^2 (3) 2/3 × 10^6 N/m^2 (4) 6×10^6 N/m^2

8. The no of faraday required to produce one mole of H20 from hydrogen oxygen fuel cell containing aquaeous alkali as electrolyte is 1)1 2)3 3)2 4)4

An alloy of copper, silver and Gold is found to have copper constituting the ccp lattice. If silver atoms occupy the edge centres and Gold is present at body centre, the alloy will have the formula:

a first order reaction is 80% completed in 10 minutes . fin specific reaction rate constant per second

A hydrogen atom is in ground state. In order to get six lines in its emission spectrum, wavelength of incident radiation should be(Take: hc=12425 eV˙A)

The average oxidation state of Sulphur in Sodium Thiosulphate is +___.