46295 + Interview Questions in Chemistry

1.	In which case number of C atoms is retained
Answer» In which case number of C atoms is retained

Discussion

2.	When the temperature is lowered and pressure is raised, the adsorption of a gas on a solid [MP PMT 1997]
Answer» When the temperature is lowered and pressure is raised, the adsorption of a gas on a solid [MP PMT 1997]

Discussion

3.	1 mol of iron( Fe) reacts completely with 0.65 mol of O2 to give a mixture of only FeO and Fe2O3 . mole ratio of ferrous oxide to ferric oxide is Give the solution using some short cut method
Answer» 1 mol of iron( Fe) reacts completely with 0.65 mol of O₂ to give a mixture of only FeO and Fe₂O₃ . mole ratio of ferrous oxide to ferric oxide is Give the solution using some short cut method

3.

1 mol of iron( Fe) reacts completely with 0.65 mol of O2 to give a mixture of only FeO and Fe2O3 . mole ratio of ferrous oxide to ferric oxide is Give the solution using some short cut method

Answer»

1 mol of iron( Fe) reacts completely with 0.65 mol of O₂ to give a mixture of only FeO and Fe₂O₃ . mole ratio of ferrous oxide to ferric oxide is

Give the solution using some short cut method

Discussion

4.	The concentration of R in the reaction R → P was measured as a function of time and the following data is obtained. [R] (molar)1.00.750.400.10t (min)0.00.050.120.18 The order of the reaction is ___
Answer» The concentration of R in the reaction R $\to$ P was measured as a function of time and the following data is obtained. $\begin{matrix} [R] (molar) & 1.0 & 0.75 & 0.40 & 0.10 t (min) & 0.0 & 0.05 & 0.12 & 0.18 \end{matrix}$ The order of the reaction is ___

4.

The concentration of R in the reaction R → P was measured as a function of time and the following data is obtained. [R] (molar)1.00.750.400.10t (min)0.00.050.120.18 The order of the reaction is ___

Answer»

The concentration of R in the reaction R $\to$ P was measured as a function of time and the following data is obtained.

$\begin{matrix} [R] (molar) & 1.0 & 0.75 & 0.40 & 0.10 t (min) & 0.0 & 0.05 & 0.12 & 0.18 \end{matrix}$

The order of the reaction is ___

Discussion

5.	Write chemical formulae of the sulphates of Aluminium, Ammonium and Zinc.
Answer» Write chemical formulae of the sulphates of Aluminium, Ammonium and Zinc.

Discussion

6.	How would you react to the statement that the electronegativity of N on Pauling scale is 3.0 in all the nitrogen compounds?
Answer» How would you react to the statement that the electronegativity of N on Pauling scale is 3.0 in all the nitrogen compounds?

Discussion

7.	Difference between alpha glucose and beta glucose.
Answer» Difference between alpha glucose and beta glucose.

Discussion

8.	How much calcium carbide is needed to produce 1.60kg polyethyne ?
Answer» How much calcium carbide is needed to produce 1.60kg polyethyne ?

Discussion

9.	Balance the following equations :- 1. Al(s) + NaOH(aq) ----------> NaAlO2(aq) + H2O(l) 2. Zn(s) + NaOH(aq) ----------> Na2ZnO2(aq) + H2O(l)
Answer» Balance the following equations :- 1. Al(s) + NaOH(aq) ----------> NaAlO2(aq) + H2O(l) 2. Zn(s) + NaOH(aq) ----------> Na2ZnO2(aq) + H2O(l)

Discussion

10.	At what temperature will the average speed of CH4 molecules have the same value as O2 has at 300 K.
Answer» At what temperature will the average speed of $C H_{4}$ molecules have the same value as $O_{2}$ has at 300 K.

Discussion

11.	How many reasonating structure can be done in CH2=CH-C=_CH
Answer» How many reasonating structure can be done in CH2=CH-C=_CH

Discussion

12.	3-Phenylpropene on reaction with HBr gives (as a major product)
Answer» 3-Phenylpropene on reaction with HBr gives (as a major product)

Discussion

13.	0.701g of silver salt of a dibasic acid on ignition yielded 0.497g of metallic silver . Molecular weight of the acid is
Answer» 0.701g of silver salt of a dibasic acid on ignition yielded 0.497g of metallic silver . Molecular weight of the acid is

Discussion

14.	4. In the following reaction using isotopic 130 in H202, 2MnO4 + 3H20218 --> 2MnO2 + 302 + 2H20 + 20H isotopic oxygen goes (1) Both with o2 (2) Both with MnO2 (3) Both with OH (4) One with O2 and one with MnO2
Answer» 4. In the following reaction using isotopic 130 in H202, 2MnO4 + 3H20218 --> 2MnO2 + 302 + 2H20 + 20H isotopic oxygen goes (1) Both with o2 (2) Both with MnO2 (3) Both with OH (4) One with O2 and one with MnO2

Discussion

15.	What is Titration? What are its types? Explain briefly
Answer» What is Titration? What are its types? Explain briefly

Discussion

16.	2 methyl propane on chorinatio
Answer» 2 methyl propane on chorinatio

Discussion

17.	The solubility of hydroxide A(OH)2 in a buffer of pH=11 is found to be 0.0416 g L−1. Molar solubility (in mol L−1) of A(OH)2 in pure water would be: (Given: molecular weight of A(OH)2=104 g mol−1 and (100)13=4.64)
Answer» The solubility of hydroxide $A (O H)_{2}$ in a buffer of $p H = 11$ is found to be $0.0416 {g L}^{- 1}$ . Molar solubility (in ${mol L}^{- 1}$ ) of $A (O H)_{2}$ in pure water would be: (Given: molecular weight of $A (O H)_{2} = 104 {g mol}^{- 1}$ and $(100)^{\frac{1}{3}} = 4.64)$

Discussion

18.

During the kinetic study of the reaction, 2A+B→C+D, following results were obtained:Run[A] mol L−1[B] mol L−1Initial rate of formation of D mol L−1 min−1I.0.10.16.0×10−3II.0.30.27.2×10−2III.0.30.42.88×10−1IV.0.40.12.40×10−2(Where, [A] and [B] are inital concentration of A and B respectively.)

Answer»

During the kinetic study of the reaction, $2 A + B \to C + D$ , following results were obtained:

Run	[A] ${mol L}^{- 1}$	[B] ${mol L}^{- 1}$	Initial rate of formation of D ${mol L}^{- 1} {min}^{- 1}$
I.	0.1	0.1	$6.0 \times 10^{- 3}$
II.	0.3	0.2	$7.2 \times 10^{- 2}$
III.	0.3	0.4	$2.88 \times 10^{- 1}$
IV.	0.4	0.1	$2.40 \times 10^{- 2}$

(Where,

[A]

and

[B]

are inital concentration of

A

and

B

respectively.)

Discussion

19.	write the resonating structure of HCO2
Answer» write the resonating structure of HCO2

Discussion

20.	Which of the following is incorrect?
Answer» Which of the following is incorrect?

Discussion

21.	The major product obtained in the reaction is expected to be:
Answer» The major product obtained in the reaction is expected to be:

Discussion

22.	A square planar complex is formed by hybridization of which of the following atomic orbitals:
Answer» A square planar complex is formed by hybridization of which of the following atomic orbitals:

Discussion

23.	Vapour pressure of solvent decreases by 1% on adding non volatile solute in a 2 s o4 , give me detailed information
Answer» Vapour pressure of solvent decreases by 1% on adding non volatile solute in a 2 s o4 , give me detailed information

Discussion

24.	An aqueous solution of sucrose (C12H22O11) containing 34.2 g/L of sucrose has an osmotic pressure of 2.38 atm at 17° C. For an aqueous solution of glucose (C6H12O6) to be isotonic with this solution, it's concentration (in g/L) should be:
Answer» An aqueous solution of sucrose (C₁₂H₂₂O₁₁) containing 34.2 g/L of sucrose has an osmotic pressure of 2.38 atm at 17° C. For an aqueous solution of glucose (C₆H₁₂O₆) to be isotonic with this solution, it's concentration (in g/L) should be:

Discussion

25.	A solution has a 1:4 mole ratio of pentane to hexane. The vapour pressures of the pure hydrocarbons at 200 C are 440 mm Hg for pentane and 120 mm Hg for hexane. The mole fraction of pentane in the vapour phase would be:
Answer» A solution has a $1 : 4$ mole ratio of pentane to hexane. The vapour pressures of the pure hydrocarbons at $20^{0} C$ are $440 mm Hg$ for pentane and $120 mm Hg$ for hexane. The mole fraction of pentane in the vapour phase would be:

Discussion

26.	Alpha D glucose equilibrium Beta D glucose, equilibrium constant for this is 1.8 the percentage of alpha D glucose at equilibrium is??1) 35.7 2) 55.63)44.44)64.3
Answer» Alpha D glucose equilibrium Beta D glucose, equilibrium constant for this is 1.8 the percentage of alpha D glucose at equilibrium is?? 1) 35.7 2) 55.6 3)44.4 4)64.3

Discussion

27.	What is/are the expected product(s) of the following Hofmann's degradadtion reaction?
Answer» What is/are the expected product(s) of the following Hofmann's degradadtion reaction?

Discussion

28.	A point object when viewed from two opposite faces of a plane glass slab appears at a distance of 6 cm and 9 cm respectively. The thickness of the glass slab is?(refractive index of glass wrt air =1.5)
Answer» A point object when viewed from two opposite faces of a plane glass slab appears at a distance of 6 cm and 9 cm respectively. The thickness of the glass slab is? (refractive index of glass wrt air =1.5)

28.

A point object when viewed from two opposite faces of a plane glass slab appears at a distance of 6 cm and 9 cm respectively. The thickness of the glass slab is?(refractive index of glass wrt air =1.5)

Answer»

A point object when viewed from two opposite faces of a plane glass slab appears at a distance of 6 cm and 9 cm respectively. The thickness of the glass slab is?

(refractive index of glass wrt air =1.5)

Discussion

29.	What is the relation between weight percent, mole percent, molecular weigh and average molecular weigh ?
Answer» What is the relation between weight percent, mole percent, molecular weigh and average molecular weigh ?

Discussion

30.	4 g of H2 is present in a 500 ml bulb. The active mass of H2 will be ?
Answer» 4 g of H2 is present in a 500 ml bulb. The active mass of H2 will be ?

Discussion

31.	Q. The pH of 1 litre solution of strong monobasic acid is 2. Find the mount of water in litres added so that its new pH will be 4
Answer» Q. The pH of 1 litre solution of strong monobasic acid is 2. Find the mount of water in litres added so that its new pH will be 4

Discussion

32.	Explain co polymer
Answer» Explain co polymer

Discussion

33.	Q 25/90 Among the following the compounds havingabnormally high boiling point isH2S,H2Se,H2TeH20
Answer» Q 25/90 Among the following the compounds havingabnormally high boiling point isH2S,H2Se,H2TeH20

Discussion

34.	Which of the following compounds possesses theC - H bond with the lowest bond dissociationenergy?(1) Toluene(3) n-pentane(2) Benzene(4) 2, 2-dimethylpropane
Answer» Which of the following compounds possesses theC - H bond with the lowest bond dissociationenergy?(1) Toluene(3) n-pentane(2) Benzene(4) 2, 2-dimethylpropane

Discussion

35.	an element n with atomic no 89 belongs to
Answer» an element n with atomic no 89 belongs to

Discussion

36.	Why we can't divide a vector by another vector?
Answer» Why we can't divide a vector by another vector?

Discussion

37.	37.Out of the following the most stable alkene is:- (1) 2,3-dimethylbut-2-ene (2)2-methylpent-2-ene (3)cis-hex-2-ene (4)hex-1-ene
Answer» 37.Out of the following the most stable alkene is:- (1) 2,3-dimethylbut-2-ene (2)2-methylpent-2-ene (3)cis-hex-2-ene (4)hex-1-ene

Discussion

38.	Velocity constant of a reaction at 290 K was found to 3.2×10−3sec−1. When the temperature is raised to 310 K, it will be about:
Answer» Velocity constant of a reaction at 290 K was found to $3.2 \times 10^{- 3} s e c^{- 1}$ . When the temperature is raised to 310 K, it will be about:

Discussion

39.	Why Cooper has more covalent character than zinc
Answer» Why Cooper has more covalent character than zinc

Discussion

40.	Which of the following is not a mineral of Magnesium?
Answer» Which of the following is not a mineral of Magnesium?

Discussion

41.	If α is the degree of ionization, C the concentration of a weak electrolyte and Ka the acid ionization constant, then the correct relationship between α, C and Ka is
Answer» If $α$ is the degree of ionization, $C$ the concentration of a weak electrolyte and $K_{a}$ the acid ionization constant, then the correct relationship between $α$ , C and $K_{a}$ is

Discussion

42.	In the given reaction sequenceNumber of moles (n) of phenyl hydrazine consumed is
Answer» In the given reaction sequence Number of moles (n) of phenyl hydrazine consumed is

Discussion

43.	34. A, B, C are 3 mutually exclusive and exhaustive events associated with a random experiment. If p(b)=(3/2)p(a) and p(c)= (1/2)p(b) then p(a)=?
Answer» 34. A, B, C are 3 mutually exclusive and exhaustive events associated with a random experiment. If p(b)=(3/2)p(a) and p(c)= (1/2)p(b) then p(a)=?

Discussion

44.	80 gm of water at 30^° C is poured on a large block of ice at 0^° C. The mass of ice that melts is
Answer» 80 gm of water at 30^° C is poured on a large block of ice at 0^° C. The mass of ice that melts is

Discussion

45.	Assertion (A): Both aromatic and aliphatic primary amines produce stable diazonium salts on diazotization Reason (R): Aromatic diazonium salt exhibit resonance
Answer» Assertion (A): Both aromatic and aliphatic primary amines produce stable diazonium salts on diazotization Reason (R): Aromatic diazonium salt exhibit resonance

45.

Assertion (A): Both aromatic and aliphatic primary amines produce stable diazonium salts on diazotization Reason (R): Aromatic diazonium salt exhibit resonance

Answer»

Assertion (A): Both aromatic and aliphatic primary amines produce stable diazonium salts on diazotization

Reason (R): Aromatic diazonium salt exhibit resonance

Discussion

46.	Freidal-Crafts reaction is not given by
Answer» Freidal-Crafts reaction is not given by

Discussion

47.	Q. What is the meaning of kinetically inert in chemistry ?
Answer» Q. What is the meaning of kinetically inert in chemistry ?

Discussion

48.	Which of the following compound will be most reactive for SN1 reactions?
Answer» Which of the following compound will be most reactive for $S_{N} 1$ reactions?

Discussion

49.	Which statement is correct with respect to chlorination of sec-butylchloride in presence of heat or light? 1. One of the products exist as three stereoisomers. 2. Two pair of diastereomers are obtained only. 3. Only one meso stereoisomer is obtained 4. Two pair of enantiomers are obtained
Answer» Which statement is correct with respect to chlorination of sec-butylchloride in presence of heat or light? 1. One of the products exist as three stereoisomers. 2. Two pair of diastereomers are obtained only. 3. Only one meso stereoisomer is obtained 4. Two pair of enantiomers are obtained

Discussion

50.	Bromine water has a red-brown colour due to the presence of bromine in it. A student adds bromine water to a little of cooking oil and butter taken in separate test-tubes.(a) What will the student observe when he adds bromine water to cooking oil? Give reason for your answer.(b) What will the student observe when he adds bromine water to butter? Give reason for your answer.
Answer» Bromine water has a red-brown colour due to the presence of bromine in it. A student adds bromine water to a little of cooking oil and butter taken in separate test-tubes. (a) What will the student observe when he adds bromine water to cooking oil? Give reason for your answer. (b) What will the student observe when he adds bromine water to butter? Give reason for your answer.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

In which case number of C atoms is retained

When the temperature is lowered and pressure is raised, the adsorption of a gas on a solid [MP PMT 1997]

1 mol of iron( Fe) reacts completely with 0.65 mol of O2 to give a mixture of only FeO and Fe2O3 . mole ratio of ferrous oxide to ferric oxide is Give the solution using some short cut method

The concentration of R in the reaction R → P was measured as a function of time and the following data is obtained. [R] (molar)1.00.750.400.10t (min)0.00.050.120.18 The order of the reaction is ___

Write chemical formulae of the sulphates of Aluminium, Ammonium and Zinc.

How would you react to the statement that the electronegativity of N on Pauling scale is 3.0 in all the nitrogen compounds?

Difference between alpha glucose and beta glucose.

How much calcium carbide is needed to produce 1.60kg polyethyne ?

Balance the following equations :- 1. Al(s) + NaOH(aq) ----------> NaAlO2(aq) + H2O(l) 2. Zn(s) + NaOH(aq) ----------> Na2ZnO2(aq) + H2O(l)

At what temperature will the average speed of CH4 molecules have the same value as O2 has at 300 K.

How many reasonating structure can be done in CH2=CH-C=_CH

3-Phenylpropene on reaction with HBr gives (as a major product)

0.701g of silver salt of a dibasic acid on ignition yielded 0.497g of metallic silver . Molecular weight of the acid is

4. In the following reaction using isotopic 130 in H202, 2MnO4 + 3H20218 --> 2MnO2 + 302 + 2H20 + 20H isotopic oxygen goes (1) Both with o2 (2) Both with MnO2 (3) Both with OH (4) One with O2 and one with MnO2

What is Titration? What are its types? Explain briefly

2 methyl propane on chorinatio

The solubility of hydroxide A(OH)2 in a buffer of pH=11 is found to be 0.0416 g L−1. Molar solubility (in mol L−1) of A(OH)2 in pure water would be: (Given: molecular weight of A(OH)2=104 g mol−1 and (100)13=4.64)

write the resonating structure of HCO2

Which of the following is incorrect?

The major product obtained in the reaction is expected to be:

A square planar complex is formed by hybridization of which of the following atomic orbitals:

Vapour pressure of solvent decreases by 1% on adding non volatile solute in a 2 s o4 , give me detailed information

An aqueous solution of sucrose (C12H22O11) containing 34.2 g/L of sucrose has an osmotic pressure of 2.38 atm at 17° C. For an aqueous solution of glucose (C6H12O6) to be isotonic with this solution, it's concentration (in g/L) should be:

A solution has a 1:4 mole ratio of pentane to hexane. The vapour pressures of the pure hydrocarbons at 200 C are 440 mm Hg for pentane and 120 mm Hg for hexane. The mole fraction of pentane in the vapour phase would be:

Alpha D glucose equilibrium Beta D glucose, equilibrium constant for this is 1.8 the percentage of alpha D glucose at equilibrium is??1) 35.7 2) 55.63)44.44)64.3

What is/are the expected product(s) of the following Hofmann's degradadtion reaction?

A point object when viewed from two opposite faces of a plane glass slab appears at a distance of 6 cm and 9 cm respectively. The thickness of the glass slab is?(refractive index of glass wrt air =1.5)

What is the relation between weight percent, mole percent, molecular weigh and average molecular weigh ?

4 g of H2 is present in a 500 ml bulb. The active mass of H2 will be ?

Q. The pH of 1 litre solution of strong monobasic acid is 2. Find the mount of water in litres added so that its new pH will be 4

Explain co polymer

Q 25/90 Among the following the compounds havingabnormally high boiling point isH2S,H2Se,H2TeH20

Which of the following compounds possesses theC - H bond with the lowest bond dissociationenergy?(1) Toluene(3) n-pentane(2) Benzene(4) 2, 2-dimethylpropane

an element n with atomic no 89 belongs to

Why we can't divide a vector by another vector?

37.Out of the following the most stable alkene is:- (1) 2,3-dimethylbut-2-ene (2)2-methylpent-2-ene (3)cis-hex-2-ene (4)hex-1-ene

Velocity constant of a reaction at 290 K was found to 3.2×10−3sec−1. When the temperature is raised to 310 K, it will be about:

Why Cooper has more covalent character than zinc

Which of the following is not a mineral of Magnesium?

If α is the degree of ionization, C the concentration of a weak electrolyte and Ka the acid ionization constant, then the correct relationship between α, C and Ka is

In the given reaction sequenceNumber of moles (n) of phenyl hydrazine consumed is

34. A, B, C are 3 mutually exclusive and exhaustive events associated with a random experiment. If p(b)=(3/2)p(a) and p(c)= (1/2)p(b) then p(a)=?

80 gm of water at 30^° C is poured on a large block of ice at 0^° C. The mass of ice that melts is

Assertion (A): Both aromatic and aliphatic primary amines produce stable diazonium salts on diazotization Reason (R): Aromatic diazonium salt exhibit resonance

Freidal-Crafts reaction is not given by

Q. What is the meaning of kinetically inert in chemistry ?

Which of the following compound will be most reactive for SN1 reactions?

Which statement is correct with respect to chlorination of sec-butylchloride in presence of heat or light? 1. One of the products exist as three stereoisomers. 2. Two pair of diastereomers are obtained only. 3. Only one meso stereoisomer is obtained 4. Two pair of enantiomers are obtained