46295 + Interview Questions in Chemistry

1.	What is the order of reactivity of following halogen acids on alcohols? HI, HBr, HCl
Answer» What is the order of reactivity of following halogen acids on alcohols? HI, HBr, HCl

Discussion

2.	Major product of the reaction is:
Answer» Major product of the reaction is:

Discussion

3.	Alkyl cyanides are isomeric with:
Answer» Alkyl cyanides are isomeric with:

Discussion

4.	Polyisoprene is a:
Answer» Polyisoprene is a:

Discussion

5.	If atoms are present on each of face centre, each corner and in body centre of a unit cell then, what will be the number of atoms present in that unit cell?
Answer» If atoms are present on each of face centre, each corner and in body centre of a unit cell then, what will be the number of atoms present in that unit cell?

Discussion

6.	Which one of the following represents an acceptable possible set of quantum numbers (in the order n, l, ml and ms for an electron in an atom?
Answer» Which one of the following represents an acceptable possible set of quantum numbers (in the order n, l, m_land m_sfor an electron in an atom?

Discussion

7.	The structure of intermediate A in the following reaction is:
Answer» The structure of intermediate A in the following reaction is:

Discussion

8.	A tertiary alcohol H upon acid catalyzed dehydration gives a product I. Ozonolysis of I leads to compounds J and K. Compound J upon reaction with KOH gives benzyl alcohol and a compound L, whereas K on reaction with KOH gives only Compound H is formed by the reaction of
Answer» A tertiary alcohol H upon acid catalyzed dehydration gives a product I. Ozonolysis of I leads to compounds J and K. Compound J upon reaction with KOH gives benzyl alcohol and a compound L, whereas K on reaction with KOH gives only Compound H is formed by the reaction of

8.

A tertiary alcohol H upon acid catalyzed dehydration gives a product I. Ozonolysis of I leads to compounds J and K. Compound J upon reaction with KOH gives benzyl alcohol and a compound L, whereas K on reaction with KOH gives only Compound H is formed by the reaction of

Answer»

A tertiary alcohol H upon acid catalyzed dehydration gives a product I. Ozonolysis of I leads to compounds J and K. Compound J upon reaction with KOH gives benzyl alcohol and a compound L, whereas K on reaction with KOH gives only

Compound H is formed by the reaction of

Discussion

9.	The zig-zag motion (erratic motion) of particles in colloid was observed by :
Answer» The zig-zag motion (erratic motion) of particles in colloid was observed by :

Discussion

10.	Why the ease of dehydration of alcohols follows sequence, tertiary>secondary>primary?
Answer» Why the ease of dehydration of alcohols follows sequence, tertiary>secondary>primary?

Discussion

11.	What are the products formed when anisole reacts with HI?
Answer» What are the products formed when anisole reacts with HI?

Discussion

12.	In the equation k = ZAB e-Ea/RT, e-Ea/RT represents
Answer» In the equation k = Z_AB e^-E_a^/RT, e^-E_a^/RT represents

Discussion

13.	pH of 0.5 M Ba(CN)2 solution (pKb of CN−=9.30) is :
Answer» pH of 0.5 M $B a (C N)_{2}$ solution $(p K_{b} o f C N^{-} = 9.30)$ is :

Discussion

14.	When BCl3 is hydrolysed the species formed is:
Answer» When BCl₃ is hydrolysed the species formed is:

Discussion

15.	Fluorination is violent, it is carried out in the presence of:
Answer» Fluorination is violent, it is carried out in the presence of:

Discussion

16.	Which of the following dioxides of group 14 elements is not solid?
Answer» Which of the following dioxides of group 14 elements is not solid?

Discussion

17.	Which of the following alcohol would dehydrate the fastest when heated with acid
Answer» Which of the following alcohol would dehydrate the fastest when heated with acid

Discussion

18.	A schematic plot of ln keq vs inverse of temperature for a reaction is shown below: The reaction must be
Answer» A schematic plot of ln $k_{e q}$ vs inverse of temperature for a reaction is shown below: The reaction must be

Discussion

19.	If I is the intensity of absorbed light and C is the concentration of AB for the photochemical process AB+hV→AB, then the rate of formation of AB is directly proportional to?
Answer» If I is the intensity of absorbed light and C is the concentration of AB for the photochemical process $A B + h V \to A B$ , then the rate of formation of AB is directly proportional to?

Discussion

20.	The hybridization of xenon atom in XeF4 is
Answer» The hybridization of xenon atom in $X e F_{4}$ is

Discussion

21.	What is X in the following sequence of reactions? XNa−−−→−12H2ZNaOH/CaO−−−−−−−→CH4
Answer» What is $X$ in the following sequence of reactions? $X N a - -- \to \frac{- 1}{2} H_{2} Z N a O H / C a O - ------ \to C H_{4}$

21.

What is X in the following sequence of reactions? XNa−−−→−12H2ZNaOH/CaO−−−−−−−→CH4

Answer»

What is $X$ in the following sequence of reactions?

$X N a - -- \to \frac{- 1}{2} H_{2} Z N a O H / C a O - ------ \to C H_{4}$

Discussion

22.	Which of the following relations do not represent the correct relation of the potential energy of an electron in the nth shell of an hydrogen atom?
Answer» Which of the following relations do not represent the correct relation of the potential energy of an electron in the $n^{t h}$ shell of an hydrogen atom?

Discussion

23.	Which of the following will not show conformers?
Answer» Which of the following will not show conformers?

Discussion

24.	Of the five isomeric hexanes, the isomer which can give two mono-chlorinated compounds is
Answer» Of the five isomeric hexanes, the isomer which can give two mono-chlorinated compounds is

Discussion

25.	If the distance between Na+ and Cl− ions in NaCl crystal is 265pm, then edge length of the unit cell will be?
Answer» If the distance between $N a^{+}$ and $C l^{-}$ ions in NaCl crystal is 265pm, then edge length of the unit cell will be?

Discussion

26.	A mixture of nitrogen and water vapours is admitted to a flask at 760 torr which contains a sufficient solid drying agent after long time the pressure reached a steady value of 722 torr. If the experiment is done at 27∘ C and drying agent increases in weight by 0.9 gm, what is the volume of the flask? Neglect any possible vapour pressure of drying agent and volume occupied by drying agent.
Answer» A mixture of nitrogen and water vapours is admitted to a flask at 760 torr which contains a sufficient solid drying agent after long time the pressure reached a steady value of 722 torr. If the experiment is done at 27 $^{\circ}$ C and drying agent increases in weight by 0.9 gm, what is the volume of the flask? Neglect any possible vapour pressure of drying agent and volume occupied by drying agent.

Discussion

27.	Which of the following is monoatomic
Answer» Which of the following is monoatomic

Discussion

28.	The reddish brown gas produced on heating a chloride salt with K2Cr2O7 and conc. H2SO4 is due to
Answer» The reddish brown gas produced on heating a chloride salt with $K_{2} C r_{2} O_{7}$ and conc. $H_{2} S O_{4}$ is due to

Discussion

29.	Which of the following process represents disproportionation reaction?
Answer» Which of the following process represents disproportionation reaction?

Discussion

30.	Electronic configuration of H− is
Answer» Electronic configuration of $H^{-}$ is

30.

Electronic configuration of H− is

Answer»

Electronic configuration of $H^{-}$ is

Discussion

31.	A bulb emits light of wavelength (λ)=4500 oA . The bulb is rated as 150 watt and 8 % of its energy is emitted as light. If number of photons emitted is x×1019, then the value of x is: (Take planck's constant h=6×10−34J s and speed of light c=3×108 m s−1)
Answer» A bulb emits light of wavelength $(λ) = 4500 o A$ . The bulb is rated as $150 w a t t$ and $8 %$ of its energy is emitted as light. If number of photons emitted is $x \times 10^{19}$ , then the value of $x$ is: (Take $planck's constant h = 6 \times 10^{- 34} J s and speed of light c = 3 \times 10^{8} m s^{- 1}$ )

Discussion

32.	The reaction of propene with HOCl (Cl2+H2O) proceeds through the intermediate:
Answer» The reaction of propene with $H O C l (C l_{2} + H_{2} O)$ proceeds through the intermediate:

Discussion

33.	What is the unit of conductance?
Answer» What is the unit of conductance?

Discussion

34.	34.05 mL of phosphorus vapour weighs 0.0625 g at 546∘C and 1 bar pressure. What is the molar mass of phosphorus?
Answer» 34.05 mL of phosphorus vapour weighs 0.0625 g at $546^{\circ} C$ and 1 bar pressure. What is the molar mass of phosphorus?

Discussion

35.	The correct order of hybridization of the central atom in the following species NH3,[PtCl4]2−, PCl5 and BCl3 is
Answer» The correct order of hybridization of the central atom in the following species $N H_{3}, [P t C l_{4}]^{2 -}$ , $P C l_{5}$ and $B C l_{3}$ is

Discussion

36.	pH of the water coming out of cation exchange resin
Answer» $p H$ of the water coming out of cation exchange resin

Discussion

37.	Consider the following sequence of reactions: H2C=CH−CH=CH2Br2 (1 mole)−−−−−−−→60 oC(A)i. KCN (excess)−−−−−−−−−→ii. H2/Ni The end product B is:
Answer» Consider the following sequence of reactions: $H_{2} C = C H - C H = C H_{2} B r_{2} (1 mole) - ------ \to 60^{o} C (A) i . K C N (excess) - -------- \to i i . H_{2} / N i$ The end product B is:

Discussion

38.	Which of the following carbohydrates are branched polymer of glucose? (a) Amylose (b) Amulopectin (c) Cellulose (d) Glycogen
Answer» Which of the following carbohydrates are branched polymer of glucose? (a) Amylose (b) Amulopectin (c) Cellulose (d) Glycogen

Discussion

39.	xH2SO4+ySO2+zNa2CrO4⟶Cr2(SO4)3+aNa2SO4+bH2O In the above reaction, x, y, z, a and b are?
Answer» $x H_{2} S O_{4} + y S O_{2} + z N a_{2} C r O_{4} ⟶ C r_{2} (S O_{4})_{3} + a N a_{2} S O_{4} + b H_{2} O$ In the above reaction, x, y, z, a and b are?

Discussion

40.	5 mL of acetone is mixed with 100 mL of H2O. Vapour pressure of water above the solution is:
Answer» 5 mL of acetone is mixed with 100 mL of H₂O. Vapour pressure of water above the solution is:

Discussion

41.	In the nucleophilic addition of CN-1 to carbonyl compound the intermediate formed is
Answer» In the nucleophilic addition of CN^-1 to carbonyl compound the intermediate formed is

Discussion

42.	The value of observed and calculated molecular weight of silver nitrate are 92.64 and 170 respectively. The degree of dissociation of AgNO3 will be:
Answer» The value of observed and calculated molecular weight of silver nitrate are 92.64 and 170 respectively. The degree of dissociation of AgNO₃ will be:

Discussion

43.	In a metal oxide, 32 % of oxygen is present by mass. What will be the equivalent mass of the metal?
Answer» In a metal oxide, 32 % of oxygen is present by mass. What will be the equivalent mass of the metal?

Discussion

44.	Which of the following compounds is expected to be coloured? (Atomic numbers are given as: [Ag=47, Cu=29, Mg=12])
Answer» Which of the following compounds is expected to be coloured? (Atomic numbers are given as: $[A g = 47, C u = 29, M g = 12]$ )

Discussion

45.	M+3 ion loses 3e−. Its oxidation number will be
Answer» $M^{+ 3}$ ion loses $3 e^{-}$ . Its oxidation number will be

Discussion

46.	X ml of H2 gas effuses through a hole in a container in 5 seconds. The time taken for the effusion of the same volume of the gas specified below under identical conditions is
Answer» $X m l$ of $H_{2}$ gas effuses through a hole in a container in 5 seconds. The time taken for the effusion of the same volume of the gas specified below under identical conditions is

Discussion

47.	According to IUPAC convention, what is the name of the compound given below?
Answer» According to IUPAC convention, what is the name of the compound given below?

Discussion

48.	The arsenic trisulphide sol has negative charge. The maximum coagulating power for precipitating it is for:
Answer» The arsenic trisulphide sol has negative charge. The maximum coagulating power for precipitating it is for:

Discussion

49.	Which of the following is an example of cumulated polyene?
Answer» Which of the following is an example of cumulated polyene?

Discussion

50.	(a) Account for the following: (i) Transition metals show variable oxidation states. (ii) Zn, Cd and Hg are soft metals. (iii) Eo value for the Mn3+/Mn2+ couple is highly positive (+ 1.57 V) as compared to Cr3+/Cr2+. (b) Write one similarity and one difference between the chemistry of lanthanoid and actinoid elements.
Answer» (a) Account for the following: (i) Transition metals show variable oxidation states. (ii) Zn, Cd and Hg are soft metals. (iii) $E^{o}$ value for the $M n^{3 +} / M n^{2 +}$ couple is highly positive (+ 1.57 V) as compared to $C r^{3 +} / C r^{2 +}$ . (b) Write one similarity and one difference between the chemistry of lanthanoid and actinoid elements.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is the order of reactivity of following halogen acids on alcohols? HI, HBr, HCl

Major product of the reaction is:

Alkyl cyanides are isomeric with:

Polyisoprene is a:

If atoms are present on each of face centre, each corner and in body centre of a unit cell then, what will be the number of atoms present in that unit cell?

Which one of the following represents an acceptable possible set of quantum numbers (in the order n, l, ml and ms for an electron in an atom?

The structure of intermediate A in the following reaction is:

A tertiary alcohol H upon acid catalyzed dehydration gives a product I. Ozonolysis of I leads to compounds J and K. Compound J upon reaction with KOH gives benzyl alcohol and a compound L, whereas K on reaction with KOH gives only Compound H is formed by the reaction of

The zig-zag motion (erratic motion) of particles in colloid was observed by :

Why the ease of dehydration of alcohols follows sequence, tertiary&gt;secondary&gt;primary?

What are the products formed when anisole reacts with HI?

In the equation k = ZAB e-Ea/RT, e-Ea/RT represents

pH of 0.5 M Ba(CN)2 solution (pKb of CN−=9.30) is :

When BCl3 is hydrolysed the species formed is:

Fluorination is violent, it is carried out in the presence of:

Which of the following dioxides of group 14 elements is not solid?

Which of the following alcohol would dehydrate the fastest when heated with acid

A schematic plot of ln keq vs inverse of temperature for a reaction is shown below: The reaction must be

If I is the intensity of absorbed light and C is the concentration of AB for the photochemical process AB+hV→AB, then the rate of formation of AB is directly proportional to?

The hybridization of xenon atom in XeF4 is

What is X in the following sequence of reactions? XNa−−−→−12H2ZNaOH/CaO−−−−−−−→CH4

Which of the following relations do not represent the correct relation of the potential energy of an electron in the nth shell of an hydrogen atom?

Which of the following will not show conformers?

Of the five isomeric hexanes, the isomer which can give two mono-chlorinated compounds is

If the distance between Na+ and Cl− ions in NaCl crystal is 265pm, then edge length of the unit cell will be?

Which of the following is monoatomic

The reddish brown gas produced on heating a chloride salt with K2Cr2O7 and conc. H2SO4 is due to

Which of the following process represents disproportionation reaction?

Electronic configuration of H− is

A bulb emits light of wavelength (λ)=4500 oA . The bulb is rated as 150 watt and 8 % of its energy is emitted as light. If number of photons emitted is x×1019, then the value of x is: (Take planck's constant h=6×10−34J s and speed of light c=3×108 m s−1)

The reaction of propene with HOCl (Cl2+H2O) proceeds through the intermediate:

What is the unit of conductance?

34.05 mL of phosphorus vapour weighs 0.0625 g at 546∘C and 1 bar pressure. What is the molar mass of phosphorus?

The correct order of hybridization of the central atom in the following species NH3,[PtCl4]2−, PCl5 and BCl3 is

pH of the water coming out of cation exchange resin

Consider the following sequence of reactions: H2C=CH−CH=CH2Br2 (1 mole)−−−−−−−→60 oC(A)i. KCN (excess)−−−−−−−−−→ii. H2/Ni The end product B is:

Which of the following carbohydrates are branched polymer of glucose? (a) Amylose (b) Amulopectin (c) Cellulose (d) Glycogen

xH2SO4+ySO2+zNa2CrO4⟶Cr2(SO4)3+aNa2SO4+bH2O In the above reaction, x, y, z, a and b are?

5 mL of acetone is mixed with 100 mL of H2O. Vapour pressure of water above the solution is:

In the nucleophilic addition of CN-1 to carbonyl compound the intermediate formed is

The value of observed and calculated molecular weight of silver nitrate are 92.64 and 170 respectively. The degree of dissociation of AgNO3 will be:

In a metal oxide, 32 % of oxygen is present by mass. What will be the equivalent mass of the metal?

Which of the following compounds is expected to be coloured? (Atomic numbers are given as: [Ag=47, Cu=29, Mg=12])

M+3 ion loses 3e−. Its oxidation number will be

X ml of H2 gas effuses through a hole in a container in 5 seconds. The time taken for the effusion of the same volume of the gas specified below under identical conditions is

According to IUPAC convention, what is the name of the compound given below?

The arsenic trisulphide sol has negative charge. The maximum coagulating power for precipitating it is for:

Which of the following is an example of cumulated polyene?

Why the ease of dehydration of alcohols follows sequence, tertiary>secondary>primary?