46295 + Interview Questions in Chemistry

1.	Which of the following is not a characteristic of a crystalline solid ? (a) Definite and characteristic heat of fusion (b) lsotropic nature (c) A regular periodically repeated pattern of arrangement of constituent particles in the entine crystal (d) A true solid
Answer» Which of the following is not a characteristic of a crystalline solid ? (a) Definite and characteristic heat of fusion (b) lsotropic nature (c) A regular periodically repeated pattern of arrangement of constituent particles in the entine crystal (d) A true solid

1.

Which of the following is not a characteristic of a crystalline solid ? (a) Definite and characteristic heat of fusion (b) lsotropic nature (c) A regular periodically repeated pattern of arrangement of constituent particles in the entine crystal (d) A true solid

Answer»

Which of the following is not a characteristic of a crystalline solid ?

(a) Definite and characteristic heat of fusion

(b) lsotropic nature

(c) A regular periodically repeated pattern of arrangement of constituent particles in the entine crystal

(d) A true solid

Discussion

2.	In the absence of hydrogen bonding, boiling point of water would have been
Answer» In the absence of hydrogen bonding, boiling point of water would have been

Discussion

3.	When the solution of Phosphorous acid (H3PO3) in D2O is evoporated, which of the following acid is formed? A.D3PO3 B.DH2PO3 C. D2HPO3
Answer» When the solution of Phosphorous acid ( $H_{3} P O_{3}$ ) in $D_{2} O$ is evoporated, which of the following acid is formed? A. $D_{3} P O_{3}$ B. $D H_{2} P O_{3}$ C. $D_{2} H P O_{3}$

3.

When the solution of Phosphorous acid (H3PO3) in D2O is evoporated, which of the following acid is formed? A.D3PO3 B.DH2PO3 C. D2HPO3

Answer»

When the solution of Phosphorous acid ( $H_{3} P O_{3}$ ) in $D_{2} O$ is evoporated, which of the following acid is formed?

A. $D_{3} P O_{3}$ B. $D H_{2} P O_{3}$ C. $D_{2} H P O_{3}$

Discussion

4.	The relative abundance of two rubidium isotopes of atomic weight 85 and 87 are 75% and 25% respectively. The average atomic weight of rubidium is ? a)75.5 b)85.5 c)87.5 d)86.5
Answer» The relative abundance of two rubidium isotopes of atomic weight 85 and 87 are 75% and 25% respectively. The average atomic weight of rubidium is ? a)75.5 b)85.5 c)87.5 d)86.5

Discussion

5.	The correct order of dipole moment is _____
Answer» The correct order of dipole moment is _____

Discussion

6.	The lanthanoid contraction is responsible for the fact that:
Answer» The lanthanoid contraction is responsible for the fact that:

Discussion

7.	Purple of Cassius is
Answer» Purple of Cassius is

Discussion

8.	Schottky defect is likely to be found in
Answer» Schottky defect is likely to be found in

Discussion

9.	If ΔHvaporisation of substance X(1) (molar mass: 30 g/mol) is 300 J/g at its boiling point 300 K, then molar entropy change for reversible condensation process is
Answer» If $Δ H_{v a p o r i s a t i o n}$ of substance X(1) (molar mass: 30 g/mol) is 300 J/g at its boiling point 300 K, then molar entropy change for reversible condensation process is

Discussion

10.	Identify the least stable ion among the following
Answer» Identify the least stable ion among the following

Discussion

11.	Which of the following elements has the largest Van der Waals radii?
Answer» Which of the following elements has the largest Van der Waals radii?

Discussion

12.	1 litre of mixture of CO and CO2is taken. The mixture is passed through a tube containing red hot charcoal. The volume now becomes 1.6 litre. The volumes are measured under the same conditions. The volume of CO2 in the original mixture is
Answer» 1 litre of mixture of $C O$ and $C O_{2}$ is taken. The mixture is passed through a tube containing red hot charcoal. The volume now becomes 1.6 litre. The volumes are measured under the same conditions. The volume of $C O_{2}$ in the original mixture is

Discussion

13.	A white waxy solid A on reduction gives B,having rotten fish smell. B on halogenation gives C which on hydrolysis gives an acidic compound D . if A on heating under inert atmosphere gives E,which is allotrope of A. Find A,B,C,D. Also give the chemical reaction involved.
Answer» A white waxy solid A on reduction gives B,having rotten fish smell. B on halogenation gives C which on hydrolysis gives an acidic compound D . if A on heating under inert atmosphere gives E,which is allotrope of A. Find A,B,C,D. Also give the chemical reaction involved.

Discussion

14.	By taking two J - tubes at constant temperature, what is the difference in the levels of mercury in two columns?
Answer» By taking two J - tubes at constant temperature, what is the difference in the levels of mercury in two columns?

Discussion

15.	The binding energy of electron in a metal is 250 kJ mole−1. The threshold frequency of metal is
Answer» The binding energy of electron in a metal is $250 k J m o l e^{- 1}$ . The threshold frequency of metal is

Discussion

16.	What is the correct relationship between the pHs of isomolar solutions of sodium oxide (pH1), sodium sulphide (pH2), sodium selenide pH3) and sodium telluride pH4) ?
Answer» What is the correct relationship between the pHs of isomolar solutions of sodium oxide $(p H_{1}),$ sodium sulphide $(p H_{2}),$ sodium selenide $p H_{3})$ and sodium telluride $p H_{4})$ ?

Discussion

17.	Solubility of a gas in water depends on
Answer» Solubility of a gas in water depends on

Discussion

18.	O2 undergoes photochemical dissociation into one normal and one excited atoms. The excited atom has 1.967 eV more energy than normal. The dissociation of O2 into two normal atoms requires 498 KJ mole-1. Then the maximum wavelength required for photochemical dissociation of O2 is
Answer» $O_{2}$ undergoes photochemical dissociation into one normal and one excited atoms. The excited atom has 1.967 eV more energy than normal. The dissociation of $O_{2}$ into two normal atoms requires 498 KJ mole-1. Then the maximum wavelength required for photochemical dissociation of $O_{2}$ is

Discussion

19.	Which of the following reagent will convert RCOR' group into RR'C(C6H5)OH?
Answer» Which of the following reagent will convert RCOR' group into RR'C(C₆H₅)OH?

Discussion

20.	Two droplets merge with each other and forms a large droplet. In this process
Answer» Two droplets merge with each other and forms a large droplet. In this process

20.

Two droplets merge with each other and forms a large droplet. In this process

Answer»

Two droplets merge with each other and forms a large droplet. In this process

Discussion

21.	Which of the following is the best electrolyte:
Answer» Which of the following is the best electrolyte:

Discussion

22.	The decreasing order of boiling points is
Answer» The decreasing order of boiling points is

Discussion

23.	Calculate enthalpy change for the change 8S(g)→S8(g)′ given that H2S2(g)→2H(g)+2S(g),ΔH=239.0 k cal mol−1H2S2(g)→2H(g)+S(g),ΔH=175.0 k cal mol−1
Answer» Calculate enthalpy change for the change $8 S_{(g)} \to S_{8 (g)^{'}}$ given that $H_{2} S_{2 (g)} \to 2 H_{(g)} + 2 S_{(g)}, Δ H = 239.0 k c a l m o l^{- 1} H_{2} S_{2 (g)} \to 2 H_{(g)} + S_{(g)}, Δ H = 175.0 k c a l m o l^{- 1}$

Discussion

24.	Increasing the temperature of solution will change
Answer» Increasing the temperature of solution will change

Discussion

25.	Maximum -I effect exerted by which of the following group ?
Answer» Maximum -I effect exerted by which of the following group ?

Discussion

26.	Identify the product of the following reaction.
Answer» Identify the product of the following reaction.

Discussion

27.	How to find the mass of 25 He atoms ?
Answer» How to find the mass of 25 He atoms ?

Discussion

28.	For the given reaction the major product 'B' is :
Answer» For the given reaction the major product 'B' is :

Discussion

29.	The enthalpy of vaporisation of liquid diethyl ether (C2H5)2O is 26 kJ mol−1 at its boiling point 35oC. Calculate △So for conversion of vapour to liquid (condensation) at 35oC.
Answer» The enthalpy of vaporisation of liquid diethyl ether $(C_{2} H_{5})_{2} O$ is $26 k J m o l^{- 1}$ at its boiling point $35^{o} C .$ Calculate $△ S^{o}$ for conversion of vapour to liquid (condensation) at $35^{o} C .$

Discussion

30.	The unpaired electrons in Al and Si are present in 3p orbital. Which electrons will experience more effective nuclear charge from the nucleus?
Answer» The unpaired electrons in Al and Si are present in 3p orbital. Which electrons will experience more effective nuclear charge from the nucleus?

Discussion

31.	What is centrifugal force?
Answer» What is centrifugal force?

Discussion

32.	When potassium dichromate crystals are heated with conc. H2SO4, we get
Answer» When potassium dichromate crystals are heated with conc. $H_{2} S O_{4}$ , we get

Discussion

33.	Bithional is generally added to the soaps as an additive to function as a/an :
Answer» Bithional is generally added to the soaps as an additive to function as a/an :

Discussion

34.	NH4OH + FeCI3 → NH4CI + Fe(OH)3 To balance the above equation, the coefficient for ammonium hydroxide and ammonium chloride will be:
Answer» NH₄OH + FeCI₃ → NH₄CI + Fe(OH)₃ To balance the above equation, the coefficient for ammonium hydroxide and ammonium chloride will be:

34.

NH4OH + FeCI3 → NH4CI + Fe(OH)3 To balance the above equation, the coefficient for ammonium hydroxide and ammonium chloride will be:

Answer»

NH₄OH + FeCI₃ → NH₄CI + Fe(OH)₃

To balance the above equation, the coefficient for ammonium hydroxide and ammonium chloride will be:

Discussion

35.	(ΔH−ΔU) in J/mol for the formation of carbon monoxide (CO) from its elements at 300 K is:R=253 J/Kmol
Answer» $(Δ H - Δ U)$ in J/mol for the formation of carbon monoxide $(C O)$ from its elements at $300 K$ is: $R = \frac{25}{3} J/Kmol$

Discussion

36.	On adding FeCl3 solution into NaOH solution, a positively charged colloidal sol is obtained when they are in :
Answer» On adding $F e C l_{3}$ solution into NaOH solution, a positively charged colloidal sol is obtained when they are in :

Discussion

37.	The most characteristic reaction of aldehyde and ketones is nucleophilic addition to carbon oxygen double bond. Aldehyde and ketones are easily susceptible to nucleophilic addition because of structural features. The trigonal planar arrangement of groups around the carbonyl carbon atom means that the carbonyl carbon atom is relatively open to attack from above and below the plane of carbonyl group. The partial positive charge on the carbonyl atom means that it is especially susceptible to attack by a nucleophile Oximes are formed by the reaction of aldehyde or ketones with
Answer» The most characteristic reaction of aldehyde and ketones is nucleophilic addition to carbon oxygen double bond. Aldehyde and ketones are easily susceptible to nucleophilic addition because of structural features. The trigonal planar arrangement of groups around the carbonyl carbon atom means that the carbonyl carbon atom is relatively open to attack from above and below the plane of carbonyl group. The partial positive charge on the carbonyl atom means that it is especially susceptible to attack by a nucleophile Oximes are formed by the reaction of aldehyde or ketones with

37.

The most characteristic reaction of aldehyde and ketones is nucleophilic addition to carbon oxygen double bond. Aldehyde and ketones are easily susceptible to nucleophilic addition because of structural features. The trigonal planar arrangement of groups around the carbonyl carbon atom means that the carbonyl carbon atom is relatively open to attack from above and below the plane of carbonyl group. The partial positive charge on the carbonyl atom means that it is especially susceptible to attack by a nucleophile Oximes are formed by the reaction of aldehyde or ketones with

Answer»

The most characteristic reaction of aldehyde and ketones is nucleophilic addition to carbon oxygen double bond. Aldehyde and ketones are easily susceptible to nucleophilic addition because of structural features. The trigonal planar arrangement of groups around the carbonyl carbon atom means that the carbonyl carbon atom is relatively open to attack from above and below the plane of carbonyl group. The partial positive charge on the carbonyl atom means that it is especially susceptible to attack by a nucleophile

Oximes are formed by the reaction of aldehyde or ketones with

Discussion

38.	For CO, isotherm is of the type as shown in the figure.Near the point A ,compressibility factor Z will be___.
Answer» For CO, isotherm is of the type as shown in the figure.Near the point A ,compressibility factor Z will be___.

38.

For CO, isotherm is of the type as shown in the figure.Near the point A ,compressibility factor Z will be___.

Answer»

For CO, isotherm is of the type as shown in the figure.Near the point A ,compressibility factor Z will be___.

Discussion

39.	One of the most important properties of d-block metal cations is the formation of coordinate compounds. Widely used theories that explain bonding in these compounds are valence bond theory and crystal field theory. The pair of complex ions which have the same value of magnetic moments is:
Answer» One of the most important properties of d-block metal cations is the formation of coordinate compounds. Widely used theories that explain bonding in these compounds are valence bond theory and crystal field theory. The pair of complex ions which have the same value of magnetic moments is:

Discussion

40.	Of the metals Be , Mg,Ca and Sr of group II A. In the periodic table the least ionic chloride would be formed by
Answer» Of the metals Be , Mg,Ca and Sr of group II A. In the periodic table the least ionic chloride would be formed by

Discussion

41.	Cyclohexene on reductive ozonalysis gives compound B. Compound ‘B’ on further treatment with aqueous NaOH followed by heating yields compound ‘C’. The compound ‘C’ is;
Answer» Cyclohexene on reductive ozonalysis gives compound B. Compound ‘B’ on further treatment with aqueous NaOH followed by heating yields compound ‘C’. The compound ‘C’ is;

Discussion

42.	In the following reaction, how is the rate of appearance of bromine related to the rate of disappearance of bromide? BrO−3(aq)+5Br−(aq)+6H+(aq)→3Br2(l)+3H2O(l)
Answer» In the following reaction, how is the rate of appearance of bromine related to the rate of disappearance of bromide? $B r O_{3 (a q)}^{-} + 5 B r_{(a q)}^{-} + 6 H_{(a q)}^{+} \to 3 B r_{2 (l)} + 3 H_{2} O_{(l)}$

Discussion

43.	In the sequence of following reactions: The starting compound ‘P’ is
Answer» In the sequence of following reactions: The starting compound ‘P’ is

43.

In the sequence of following reactions: The starting compound ‘P’ is

Answer»

In the sequence of following reactions:

The starting compound ‘P’ is

Discussion

44.	A,B,C and D are the sets with 3,3,4 and 4 elements respectively. If f(x) is a function defined from A to C g(x) is a function defined from D to A h(x) is a function defined from C to D i(x) is a function defined from A to B Then number of functions possible for List IList II(1)h(x) if it is one - one(P)36(2)g(x) if it is onto(Q)40(3)i(x) if it is into(R)64(4)f(x) if it is many - one(S)48(T)3 (U)24 Which of the following is the correct combination?
Answer» $A, B, C$ and $D$ are the sets with $3, 3, 4$ and $4$ elements respectively. If $f (x)$ is a function defined from $A$ to $C$ $g (x)$ is a function defined from $D$ to $A$ $h (x)$ is a function defined from $C$ to $D$ $i (x)$ is a function defined from $A$ to $B$ Then number of functions possible for $\begin{matrix} List I & List II (1) & h (x) if it is one - one & (P) & 36 (2) & g (x) if it is onto & (Q) & 40 (3) & i (x) if it is into & (R) & 64 (4) & f (x) if it is many - one & (S) & 48 (T) & 3 (U) & 24 \end{matrix}$ Which of the following is the correct combination?

Discussion

45.	0.5 moles of gas A and X moles of gas B exert a pressure of 200 Pa in a container of volume 10 m3 at 1000 K. Given R is the gas constant having the units JK−1mol−1. X is :
Answer» $0.5$ moles of gas $A$ and $X$ moles of gas $B$ exert a pressure of $200 P a$ in a container of volume $10 m^{3}$ at $1000 K$ . Given $R$ is the gas constant having the units $J K^{-} 1 m o l^{-} 1$ . $X$ is :

Discussion

46.	Arrange the following in the order of property indicated for each set: F2,Cl2,Br2,I2 - increasing bond dissociation enthalpy. HF,HCl, HBr, HI- Increasing acid strength. NH3,PH3,AsH3,SbH3,BiH3- increasing base strength.
Answer» Arrange the following in the order of property indicated for each set: $F_{2}, C l_{2}, B r_{2}, I_{2}$ - increasing bond dissociation enthalpy. HF,HCl, HBr, HI- Increasing acid strength. $N H_{3}, P H_{3}, A s H_{3}, S b H_{3}, B i H_{3}$ - increasing base strength.

46.

Arrange the following in the order of property indicated for each set: F2,Cl2,Br2,I2 - increasing bond dissociation enthalpy. HF,HCl, HBr, HI- Increasing acid strength. NH3,PH3,AsH3,SbH3,BiH3- increasing base strength.

Answer»

Arrange the following in the order of property indicated for each set:

$F_{2}, C l_{2}, B r_{2}, I_{2}$ - increasing bond dissociation enthalpy.

HF,HCl, HBr, HI- Increasing acid strength.

$N H_{3}, P H_{3}, A s H_{3}, S b H_{3}, B i H_{3}$ - increasing base strength.

Discussion

47.	Toluene diisocyanate is used to prepare
Answer» Toluene diisocyanate is used to prepare

Discussion

48.	What is the reduction potential of hydrogen half cell in a solution of pH=2?
Answer» What is the reduction potential of hydrogen half cell in a solution of $p H = 2$ ?

Discussion

49.	Which of the following is not a basic amino acid?
Answer» Which of the following is not a basic amino acid?

Discussion

50.	The product of the following reaction sequence, ‘Y′ is:
Answer» The product of the following reaction sequence, $‘ Y^{'}$ is:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following is not a characteristic of a crystalline solid ? (a) Definite and characteristic heat of fusion (b) lsotropic nature (c) A regular periodically repeated pattern of arrangement of constituent particles in the entine crystal (d) A true solid

In the absence of hydrogen bonding, boiling point of water would have been

When the solution of Phosphorous acid (H3PO3) in D2O is evoporated, which of the following acid is formed? A.D3PO3 B.DH2PO3 C. D2HPO3

The relative abundance of two rubidium isotopes of atomic weight 85 and 87 are 75% and 25% respectively. The average atomic weight of rubidium is ? a)75.5 b)85.5 c)87.5 d)86.5

The correct order of dipole moment is _____

The lanthanoid contraction is responsible for the fact that:

Purple of Cassius is

Schottky defect is likely to be found in

If ΔHvaporisation of substance X(1) (molar mass: 30 g/mol) is 300 J/g at its boiling point 300 K, then molar entropy change for reversible condensation process is

Identify the least stable ion among the following

Which of the following elements has the largest Van der Waals radii?

1 litre of mixture of CO and CO2is taken. The mixture is passed through a tube containing red hot charcoal. The volume now becomes 1.6 litre. The volumes are measured under the same conditions. The volume of CO2 in the original mixture is

A white waxy solid A on reduction gives B,having rotten fish smell. B on halogenation gives C which on hydrolysis gives an acidic compound D . if A on heating under inert atmosphere gives E,which is allotrope of A. Find A,B,C,D. Also give the chemical reaction involved.

By taking two J - tubes at constant temperature, what is the difference in the levels of mercury in two columns?

The binding energy of electron in a metal is 250 kJ mole−1. The threshold frequency of metal is

What is the correct relationship between the pHs of isomolar solutions of sodium oxide (pH1), sodium sulphide (pH2), sodium selenide pH3) and sodium telluride pH4) ?

Solubility of a gas in water depends on

O2 undergoes photochemical dissociation into one normal and one excited atoms. The excited atom has 1.967 eV more energy than normal. The dissociation of O2 into two normal atoms requires 498 KJ mole-1. Then the maximum wavelength required for photochemical dissociation of O2 is

Which of the following reagent will convert RCOR' group into RR'C(C6H5)OH?

Two droplets merge with each other and forms a large droplet. In this process

Which of the following is the best electrolyte:

The decreasing order of boiling points is

Calculate enthalpy change for the change 8S(g)→S8(g)′ given that H2S2(g)→2H(g)+2S(g),ΔH=239.0 k cal mol−1H2S2(g)→2H(g)+S(g),ΔH=175.0 k cal mol−1

Increasing the temperature of solution will change

Maximum -I effect exerted by which of the following group ?

Identify the product of the following reaction.

How to find the mass of 25 He atoms ?

For the given reaction the major product 'B' is :

The enthalpy of vaporisation of liquid diethyl ether (C2H5)2O is 26 kJ mol−1 at its boiling point 35oC. Calculate △So for conversion of vapour to liquid (condensation) at 35oC.

The unpaired electrons in Al and Si are present in 3p orbital. Which electrons will experience more effective nuclear charge from the nucleus?

What is centrifugal force?

When potassium dichromate crystals are heated with conc. H2SO4, we get

Bithional is generally added to the soaps as an additive to function as a/an :

NH4OH + FeCI3 → NH4CI + Fe(OH)3 To balance the above equation, the coefficient for ammonium hydroxide and ammonium chloride will be:

(ΔH−ΔU) in J/mol for the formation of carbon monoxide (CO) from its elements at 300 K is:R=253 J/Kmol

On adding FeCl3 solution into NaOH solution, a positively charged colloidal sol is obtained when they are in :

For CO, isotherm is of the type as shown in the figure.Near the point A ,compressibility factor Z will be___.

One of the most important properties of d-block metal cations is the formation of coordinate compounds. Widely used theories that explain bonding in these compounds are valence bond theory and crystal field theory. The pair of complex ions which have the same value of magnetic moments is:

Of the metals Be , Mg,Ca and Sr of group II A. In the periodic table the least ionic chloride would be formed by

Cyclohexene on reductive ozonalysis gives compound B. Compound ‘B’ on further treatment with aqueous NaOH followed by heating yields compound ‘C’. The compound ‘C’ is;

In the following reaction, how is the rate of appearance of bromine related to the rate of disappearance of bromide? BrO−3(aq)+5Br−(aq)+6H+(aq)→3Br2(l)+3H2O(l)

In the sequence of following reactions: The starting compound ‘P’ is

0.5 moles of gas A and X moles of gas B exert a pressure of 200 Pa in a container of volume 10 m3 at 1000 K. Given R is the gas constant having the units JK−1mol−1. X is :

Arrange the following in the order of property indicated for each set: F2,Cl2,Br2,I2 - increasing bond dissociation enthalpy. HF,HCl, HBr, HI- Increasing acid strength. NH3,PH3,AsH3,SbH3,BiH3- increasing base strength.

Toluene diisocyanate is used to prepare

What is the reduction potential of hydrogen half cell in a solution of pH=2?

Which of the following is not a basic amino acid?

The product of the following reaction sequence, ‘Y′ is: