46295 + Interview Questions in Chemistry

1.	Mole fraction of vapours of A above the solution in a mixture of A and B (XA=0.4 ) is:
Answer» Mole fraction of vapours of A above the solution in a mixture of A and B (X_A=0.4 ) is:

1.

Mole fraction of vapours of A above the solution in a mixture of A and B (XA=0.4 ) is:

Answer»

Mole fraction of vapours of A above the solution in a mixture of A and B (X_A=0.4 ) is:

2.	IgG consists of
Answer» IgG consists of

Discussion

3.	Which of the following is a buffer solution?
Answer» Which of the following is a buffer solution?

Discussion

4.	In which alkyl halide, SN2 mechanism is favoured maximum [RPMT 1997]
Answer» In which alkyl halide, SN² mechanism is favoured maximum [RPMT 1997]

4.

In which alkyl halide, SN2 mechanism is favoured maximum [RPMT 1997]

Answer»

In which alkyl halide, SN² mechanism is favoured maximum

[RPMT 1997]

Discussion

5.	Bond length ofH2 is 0.07nm ,Bond length of Cl2is0.198nm. Bond lengthof HCl is
Answer» Bond length ofH₂ is 0.07nm ,Bond length of Cl₂is0.198nm. Bond lengthof HCl is

Discussion

6.	The number of d - electrons in Fe2+ (Z = 26) is not equal to the number of electrons in which one of the following ?
Answer» The number of d - electrons in $F e^{2 +}$ (Z = 26) is not equal to the number of electrons in which one of the following ?

Discussion

7.	The reagent(s) that can selectively precipitate S2− from a mixture of S2– and SO2−4 in aqueous solution is/are:
Answer» The reagent(s) that can selectively precipitate $S^{2 -}$ from a mixture of $S^{2 -}$ and $S O_{4}^{2 -}$ in aqueous solution is/are:

Discussion

8.	Each of the following options contains a set of four molecules, identify the option(s) where all four molecules possess a permanent dipole moment at room temperature.
Answer» Each of the following options contains a set of four molecules, identify the option(s) where all four molecules possess a permanent dipole moment at room temperature.

Discussion

9.	The organic chloro compound which shows complete stereo chemical inversion during a SN2 reaction is
Answer» The organic chloro compound which shows complete stereo chemical inversion during a $S N_{2}$ reaction is

Discussion

10.	Molecule obtained by sp3d2 hybridization has bond angle of
Answer» Molecule obtained by $s p^{3} d^{2}$ hybridization has bond angle of

Discussion

11.	Number of resonating structures of aniline is:
Answer» Number of resonating structures of aniline is:

Discussion

12.	Which one of the following pair of compounds illustrates law of multiple proportions?
Answer» Which one of the following pair of compounds illustrates law of multiple proportions?

Discussion

13.	Total no. of reactions in which disproportion will occur. (i)NO2+H2O→(ii)Zn+Conc.HNO3→(iii)WhiteP4+NaOH→ (iv)HCHO+NaOHCannizaro reaction−−−−−−−−−−−→(v)FeSO4+NO−3+H2SO4→(vi)P4+SOCl2→ (vii)H3PO3Δ−→(viii)I−+S2O2−8→(ix)MnO2−4H+−−→→(x)HNO2Δ−→ ___
Answer» Total no. of reactions in which disproportion will occur. $(i) N O_{2} + H_{2} O \to (i i) Z n + C o n c . H N O_{3} \to (i i i) W h i t e P_{4} + N a O H \to$ $(i v) H C H O + N a O H Cannizaro reaction - ---------- \to (v) F e S O_{4} + N O_{3}^{-} + H_{2} S O_{4} \to (v i) P_{4} + S O C l_{2} \to$ $(v i i) H_{3} P O_{3} Δ - \to (v i i i) I^{-} + S_{2} O_{8}^{2 -} \to (i x) M n O_{4}^{2 -} H^{+} - - \to \to (x) H N O_{2} Δ - \to$ ___

13.

Total no. of reactions in which disproportion will occur. (i)NO2+H2O→(ii)Zn+Conc.HNO3→(iii)WhiteP4+NaOH→ (iv)HCHO+NaOHCannizaro reaction−−−−−−−−−−−→(v)FeSO4+NO−3+H2SO4→(vi)P4+SOCl2→ (vii)H3PO3Δ−→(viii)I−+S2O2−8→(ix)MnO2−4H+−−→→(x)HNO2Δ−→ ___

Answer»

Total no. of reactions in which disproportion will occur.

$(i) N O_{2} + H_{2} O \to (i i) Z n + C o n c . H N O_{3} \to (i i i) W h i t e P_{4} + N a O H \to$
$(i v) H C H O + N a O H Cannizaro reaction - ---------- \to (v) F e S O_{4} + N O_{3}^{-} + H_{2} S O_{4} \to (v i) P_{4} + S O C l_{2} \to$
$(v i i) H_{3} P O_{3} Δ - \to (v i i i) I^{-} + S_{2} O_{8}^{2 -} \to (i x) M n O_{4}^{2 -} H^{+} - - \to \to (x) H N O_{2} Δ - \to$

___

Discussion

14.	Replacement of Cl of chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-dinitrochlorobenzene is readily replaced because [CBSE PMT
Answer» Replacement of Cl of chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-dinitrochlorobenzene is readily replaced because [CBSE PMT

14.

Replacement of Cl of chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-dinitrochlorobenzene is readily replaced because [CBSE PMT

Answer»

Replacement of Cl of chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-dinitrochlorobenzene is readily replaced because

[CBSE PMT

Discussion

15.	An element with mass number 81 contains 31.7% more neutrons as compared to protons. Assign the atomic symbol.
Answer» An element with mass number 81 contains 31.7% more neutrons as compared to protons. Assign the atomic symbol.

Discussion

16.	If M is a cation of plus 2 and anion -2 wat is the formula of the compound?
Answer» If M is a cation of plus 2 and anion -2 wat is the formula of the compound?

Discussion

17.	Which of the following cannot work as oxidising agent?
Answer» Which of the following cannot work as oxidising agent?

Discussion

18.	On adding solute to a pure solvent, having vapour pressure 0.80 atm, vapour pressure reduces to 0.60 atm. Mole fraction of solute is
Answer» On adding solute to a pure solvent, having vapour pressure 0.80 atm, vapour pressure reduces to 0.60 atm. Mole fraction of solute is

18.

On adding solute to a pure solvent, having vapour pressure 0.80 atm, vapour pressure reduces to 0.60 atm. Mole fraction of solute is

Answer»

On adding solute to a pure solvent, having vapour pressure 0.80 atm, vapour pressure reduces to 0.60 atm. Mole fraction of solute is

Discussion

19.	The hydrogen electrode is dipped in a solution of The potential of the cell would be (the value of 2.303RT/F is 0.059 V)
Answer» The hydrogen electrode is dipped in a solution of The potential of the cell would be (the value of 2.303RT/F is 0.059 V)

Discussion

20.	Write the structures of the products when Butan-2-ol reacts with the following: (a) CrO3 (b) SOCl2
Answer» Write the structures of the products when Butan-2-ol reacts with the following: (a) $C r O_{3}$ (b) $S O C l_{2}$

Discussion

21.	How many of following have at least one bond angle less than 109∘ 28′ ? CH4 , NH+4 , NH3 , H2O, F2O, Cl2O, ClO2 , NF3 , CF4 , PCl5 , NO2 , SO2−4 , CH2F2 , SF6 , BF−4 , CF3Cl, H2S, PH3 , SOF4 , PF2Cl3
Answer» How many of following have at least one bond angle less than $109^{\circ} 28^{^{'}}$ ? $C H_{4}$ , $N H_{4}^{+}$ , $N H_{3}$ , $H_{2} O$ , $F_{2} O$ , $C l_{2} O$ , $C l O_{2}$ , $N F_{3}$ , $C F_{4}$ , $P C l_{5}$ , $N O_{2}$ , $S O_{4}^{2 -}$ , $C H_{2} F_{2}$ , $S F_{6}$ , $B F_{4}^{-}$ , $C F_{3} C l$ , $H_{2} S$ , $P H_{3}$ , $S O F_{4}$ , $P F_{2} C l_{3}$

Discussion

22.	The type of isomerism exhibited by the compound with formula C4H10O is
Answer» The type of isomerism exhibited by the compound with formula $C_{4} H_{10} O$ is

Discussion

23.	The reaction of propene with HOCl gives major product as:
Answer» The reaction of propene with $H O C l$ gives major product as:

Discussion

24.	A closed vessel with rigid walls contain 1 mol of 23892U and 1 mol of air at 298 K. Considering complete decay of 23892U to 20682Pb, the ratio of the final pressure to the initial pressure of the system at 298 K is
Answer» A closed vessel with rigid walls contain 1 mol of $_{92}^{238} U$ and 1 mol of air at 298 K. Considering complete decay of $_{92}^{238} U$ to $_{82}^{206} P b$ , the ratio of the final pressure to the initial pressure of the system at 298 K is

Discussion

25.	Be and Al exhibit many properties which are similar. But the two elements differ in:
Answer» Be and Al exhibit many properties which are similar. But the two elements differ in:

Discussion

26.	Give the structures and IUPAC names of monohydric phenols of molecular formula, C7H8O
Answer» Give the structures and IUPAC names of monohydric phenols of molecular formula, $C_{7} H_{8} O$

Discussion

27.	The IUPAC name of the structure CH3−CH=C\|CH3−C≡ C−CH3
Answer» The IUPAC name of the structure $C H_{3} - C H = C \| C H_{3} - C \equiv C - C H_{3}$

27.

The IUPAC name of the structure CH3−CH=C|CH3−C≡ C−CH3

Answer»

The IUPAC name of the structure

$C H_{3} - C H = C | C H_{3} - C \equiv C - C H_{3}$

Discussion

28.	The species in which the N atom is in a state of sp hybridization is:
Answer» The species in which the N atom is in a state of sp hybridization is:

Discussion

29.	Teflon is
Answer» Teflon is

Discussion

30.	At a certain temperature and total pressure of 105 Pa, iodine vapour contains 40% by volume of I atoms I2(g)↔2l(g) Calculate Kp for the equilibrium.
Answer» At a certain temperature and total pressure of 105 Pa, iodine vapour contains 40% by volume of I atoms $I_{2} (g) \leftrightarrow 2 l (g)$ Calculate $K_{p}$ for the equilibrium.

Discussion

31.	During photosynthesis evolution of oxygen is from-
Answer» During photosynthesis evolution of oxygen is from-

Discussion

32.	The C−C bond length is maximum in
Answer» The $C - C$ bond length is maximum in

Discussion

33.	Compound having a molecular formula C4H8O3 on acetylation gives an acetyl derivative compound having a molecular weight 188. The number of OH group(s) in the compound is:
Answer» Compound having a molecular formula $C_{4} H_{8} O_{3}$ on acetylation gives an acetyl derivative compound having a molecular weight 188. The number of $O H$ group(s) in the compound is:

Discussion

34.	For H3PO3 and H3PO4, the correct choice is:
Answer» For $H_{3} P O_{3}$ and $H_{3} P O_{4}$ , the correct choice is:

Discussion

35.	A certain gas effuses out of two different vessels A and B. A has a circular orifice while B has a square orifice of length equal to the radius of the orifice of vessel A. The ratio of rate of diffusion of the gas from vessel A to that from vessel B is
Answer» A certain gas effuses out of two different vessels $A$ and $B$ . $A$ has a circular orifice while $B$ has a square orifice of length equal to the radius of the orifice of vessel $A$ . The ratio of rate of diffusion of the gas from vessel $A$ to that from vessel $B$ is

Discussion

36.	The time required for 10% completion of a first order reaction at 298 K is equal to that required for its 25% completion at 308K. If the value of A is 4 \times 1010s−1. Calculate K at 318 K and Ea
Answer» The time required for $10 %$ completion of a first order reaction at 298 K is equal to that required for its $25 %$ completion at 308K. If the value of A is 4 \times $10^{10} s^{- 1}$ . Calculate K at 318 K and $E_{a}$

Discussion

37.	In carius method, 0.1775 g of an organic compound gave 0.2866 g of silver chloride. Calculate the percentage of chlorine in the compound. [Molecular mass of AgCl=143.2 g/mol]
Answer» In carius method, 0.1775 g of an organic compound gave 0.2866 g of silver chloride. Calculate the percentage of chlorine in the compound. [Molecular mass of $A g C l = 143.2 g / m o l$ ]

Discussion

38.	Among the following complexes the one which shows Zero crystal field stabilization energy (CFSE) is
Answer» Among the following complexes the one which shows Zero crystal field stabilization energy (CFSE) is

Discussion

39.	At 405 K, 70 ml of one mol of ammonia has dPdV=0, then which of the following options is not correct?
Answer» At 405 K, 70 ml of one mol of ammonia has $\frac{d P}{d V} = 0$ , then which of the following options is not correct?

Discussion

40.	The change in entropy (ΔS) in an adsorption process will be
Answer» The change in entropy ( $Δ S$ ) in an adsorption process will be

Discussion

41.	Match the polymers given in Column I with their commercial names given in Column II. Column IColumn IIA.Polyester of glycol and phthalic acid1.NovolacB.Copolymer of 1,3−butadiene and styrene2.GlyptalC.Phenol and formaldehyde resin3.Buna−SD.Polyester of glycol and terephthalic acid4.Buna−NE.Copolymer of 1,3−butadiene and acrylonitrile5.Dacron
Answer» Match the polymers given in Column I with their commercial names given in Column II. $\begin{matrix} C o l u m n I & C o l u m n I I A . & P o l y e s t e r o f g l y c o l a n d p h t h a l i c a c i d & 1. & N o v o l a c B . & C o p o l y m e r o f 1, 3 - b u t a d i e n e a n d s t y r e n e & 2. & G l y p t a l C . & P h e n o l a n d f o r m a l d e h y d e r e s i n & 3. & B u n a - S D . & P o l y e s t e r o f g l y c o l a n d t e r e p h t h a l i c a c i d & 4. & B u n a - N E . & C o p o l y m e r o f 1, 3 - b u t a d i e n e a n d a c r y l o n i t r i l e & 5. & D a c r o n \end{matrix}$

41.

Match the polymers given in Column I with their commercial names given in Column II. Column IColumn IIA.Polyester of glycol and phthalic acid1.NovolacB.Copolymer of 1,3−butadiene and styrene2.GlyptalC.Phenol and formaldehyde resin3.Buna−SD.Polyester of glycol and terephthalic acid4.Buna−NE.Copolymer of 1,3−butadiene and acrylonitrile5.Dacron

Answer»

Match the polymers given in Column I with their commercial names given in Column II.

$\begin{matrix} C o l u m n I & C o l u m n I I A . & P o l y e s t e r o f g l y c o l a n d p h t h a l i c a c i d & 1. & N o v o l a c B . & C o p o l y m e r o f 1, 3 - b u t a d i e n e a n d s t y r e n e & 2. & G l y p t a l C . & P h e n o l a n d f o r m a l d e h y d e r e s i n & 3. & B u n a - S D . & P o l y e s t e r o f g l y c o l a n d t e r e p h t h a l i c a c i d & 4. & B u n a - N E . & C o p o l y m e r o f 1, 3 - b u t a d i e n e a n d a c r y l o n i t r i l e & 5. & D a c r o n \end{matrix}$

Discussion

42.	Assertion and Reason In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice.. (a) Assertion and reason both are correct statements but reason does not explain assertion. (b) Assertion and reason both are correct and reason explains asssWon. (c) Both assertion and reason are Wrong statements. (d) Assertion is correct statement reason is wrong statement. (e) Assertion is wrong statement reason is correct statement. Assertion (A) All chemicals added to food items are called food preservatives. Reason (R) All these chemicals increase the nutritive value of the food.
Answer» Assertion and Reason In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice.. (a) Assertion and reason both are correct statements but reason does not explain assertion. (b) Assertion and reason both are correct and reason explains asssWon. (c) Both assertion and reason are Wrong statements. (d) Assertion is correct statement reason is wrong statement. (e) Assertion is wrong statement reason is correct statement. Assertion (A) All chemicals added to food items are called food preservatives. Reason (R) All these chemicals increase the nutritive value of the food.

42.

Assertion and Reason In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice.. (a) Assertion and reason both are correct statements but reason does not explain assertion. (b) Assertion and reason both are correct and reason explains asssWon. (c) Both assertion and reason are Wrong statements. (d) Assertion is correct statement reason is wrong statement. (e) Assertion is wrong statement reason is correct statement. Assertion (A) All chemicals added to food items are called food preservatives. Reason (R) All these chemicals increase the nutritive value of the food.

Answer»

Assertion and Reason
In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice..
(a) Assertion and reason both are correct statements but reason does not explain assertion.
(b) Assertion and reason both are correct and reason explains asssWon.
(c) Both assertion and reason are Wrong statements.
(d) Assertion is correct statement reason is wrong statement.
(e) Assertion is wrong statement reason is correct statement.

Assertion (A) All chemicals added to food items are called food preservatives. Reason (R) All these chemicals increase the nutritive value of the food.

Discussion

43.	Give the disproportionation reaction of H3PO3.
Answer» Give the disproportionation reaction of $H_{3} P O_{3}$ .

Discussion

44.	In any unimolecular reaction ......... . (a) only one reacting species is involved in the rate determining step (b) the order and the molecularity of slowest step are equalto one (c) the molecularity of the reaction is one and order is zero (d) both molecularity and order of the reaction are one
Answer» In any unimolecular reaction ......... . (a) only one reacting species is involved in the rate determining step (b) the order and the molecularity of slowest step are equalto one (c) the molecularity of the reaction is one and order is zero (d) both molecularity and order of the reaction are one

Discussion

45.	Which one of the following structure represent Isopentyl group?
Answer» Which one of the following structure represent Isopentyl group?

Discussion

46.	How will you distinguish 1∘ and 2∘ hydroxyl groups present in glucose? Explain with reactions.
Answer» How will you distinguish $1^{\circ} a n d 2^{\circ}$ hydroxyl groups present in glucose? Explain with reactions.

Discussion

47.	Find MPC when investment multiplier =1.
Answer» Find MPC when investment multiplier $= 1$ .

Discussion

48.	How do you account for the formation of ethane during chlorination of methane?
Answer» How do you account for the formation of ethane during chlorination of methane?

Discussion

49.	3g of H2 and 24g of O2 are present in a gaseous mixture at constant temperature and pressure. Find the partial pressure of hydrogen.
Answer» 3g of $H_{2}$ and 24g of $O_{2}$ are present in a gaseous mixture at constant temperature and pressure. Find the partial pressure of hydrogen.

Discussion

50.	NaCl can be used in preparation of which of the following compounds?
Answer» NaCl can be used in preparation of which of the following compounds?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Mole fraction of vapours of A above the solution in a mixture of A and B (XA=0.4 ) is:

IgG consists of

Which of the following is a buffer solution?

In which alkyl halide, SN2 mechanism is favoured maximum [RPMT 1997]

Bond length ofH2 is 0.07nm ,Bond length of Cl2is0.198nm. Bond lengthof HCl is

The number of d - electrons in Fe2+ (Z = 26) is not equal to the number of electrons in which one of the following ?

The reagent(s) that can selectively precipitate S2− from a mixture of S2– and SO2−4 in aqueous solution is/are:

Each of the following options contains a set of four molecules, identify the option(s) where all four molecules possess a permanent dipole moment at room temperature.

The organic chloro compound which shows complete stereo chemical inversion during a SN2 reaction is

Molecule obtained by sp3d2 hybridization has bond angle of

Number of resonating structures of aniline is:

Which one of the following pair of compounds illustrates law of multiple proportions?

Replacement of Cl of chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-dinitrochlorobenzene is readily replaced because [CBSE PMT

An element with mass number 81 contains 31.7% more neutrons as compared to protons. Assign the atomic symbol.

If M is a cation of plus 2 and anion -2 wat is the formula of the compound?

Which of the following cannot work as oxidising agent?

On adding solute to a pure solvent, having vapour pressure 0.80 atm, vapour pressure reduces to 0.60 atm. Mole fraction of solute is

The hydrogen electrode is dipped in a solution of The potential of the cell would be (the value of 2.303RT/F is 0.059 V)

Write the structures of the products when Butan-2-ol reacts with the following: (a) CrO3 (b) SOCl2

How many of following have at least one bond angle less than 109∘ 28′ ? CH4 , NH+4 , NH3 , H2O, F2O, Cl2O, ClO2 , NF3 , CF4 , PCl5 , NO2 , SO2−4 , CH2F2 , SF6 , BF−4 , CF3Cl, H2S, PH3 , SOF4 , PF2Cl3

The type of isomerism exhibited by the compound with formula C4H10O is

The reaction of propene with HOCl gives major product as:

A closed vessel with rigid walls contain 1 mol of 23892U and 1 mol of air at 298 K. Considering complete decay of 23892U to 20682Pb, the ratio of the final pressure to the initial pressure of the system at 298 K is

Be and Al exhibit many properties which are similar. But the two elements differ in:

Give the structures and IUPAC names of monohydric phenols of molecular formula, C7H8O

The IUPAC name of the structure CH3−CH=C|CH3−C≡ C−CH3

The species in which the N atom is in a state of sp hybridization is:

Teflon is

At a certain temperature and total pressure of 105 Pa, iodine vapour contains 40% by volume of I atoms I2(g)↔2l(g) Calculate Kp for the equilibrium.

During photosynthesis evolution of oxygen is from-

The C−C bond length is maximum in

Compound having a molecular formula C4H8O3 on acetylation gives an acetyl derivative compound having a molecular weight 188. The number of OH group(s) in the compound is:

For H3PO3 and H3PO4, the correct choice is:

A certain gas effuses out of two different vessels A and B. A has a circular orifice while B has a square orifice of length equal to the radius of the orifice of vessel A. The ratio of rate of diffusion of the gas from vessel A to that from vessel B is

The time required for 10% completion of a first order reaction at 298 K is equal to that required for its 25% completion at 308K. If the value of A is 4 \times 1010s−1. Calculate K at 318 K and Ea

In carius method, 0.1775 g of an organic compound gave 0.2866 g of silver chloride. Calculate the percentage of chlorine in the compound. [Molecular mass of AgCl=143.2 g/mol]

Among the following complexes the one which shows Zero crystal field stabilization energy (CFSE) is

At 405 K, 70 ml of one mol of ammonia has dPdV=0, then which of the following options is not correct?

The change in entropy (ΔS) in an adsorption process will be

Give the disproportionation reaction of H3PO3.

In any unimolecular reaction ......... . (a) only one reacting species is involved in the rate determining step (b) the order and the molecularity of slowest step are equalto one (c) the molecularity of the reaction is one and order is zero (d) both molecularity and order of the reaction are one

Which one of the following structure represent Isopentyl group?

How will you distinguish 1∘ and 2∘ hydroxyl groups present in glucose? Explain with reactions.

Find MPC when investment multiplier =1.

How do you account for the formation of ethane during chlorination of methane?

3g of H2 and 24g of O2 are present in a gaseous mixture at constant temperature and pressure. Find the partial pressure of hydrogen.

NaCl can be used in preparation of which of the following compounds?