46295 + Interview Questions in Chemistry

1.	In a set of reaction acetic acid generates product D CH3COOHSOCl2−−−−→ABengene−−−−−−−→Anhy AlCl3BHCN−−−→CHOH−−−→D The structure of D would be
Answer» In a set of reaction acetic acid generates product D $C H_{3} C O O H S O C l_{2} - --- \to A B e n g e n e - ------ \to A n h y A l C l_{3} B H C N - -- \to C H O H - -- \to D$ The structure of D would be

Discussion

2.	charge to mass ration of neutron?
Answer» charge to mass ration of neutron?

Discussion

3.	Correct order of negative electron gain enthalpy is:
Answer» Correct order of negative electron gain enthalpy is:

Discussion

4.	Are the elements having high negative electron gain enthalpy more electronegative?
Answer» Are the elements having high negative electron gain enthalpy more electronegative?

Discussion

5.	In the following sequence of reactions, the product (B) is CH3CHOHCN−−−→(A)H2O−−→(B)
Answer» In the following sequence of reactions, the product (B) is $C H_{3} C H O H C N - -- \to (A) H_{2} O - - \to (B)$

5.

In the following sequence of reactions, the product (B) is CH3CHOHCN−−−→(A)H2O−−→(B)

Answer»

In the following sequence of reactions, the product (B) is

$C H_{3} C H O H C N - -- \to (A) H_{2} O - - \to (B)$

Discussion

6.	The oxides which are soluble in sodium hydroxide are: 1. As2O3 2.Sb2O3 3.SnO The correct options are:
Answer» The oxides which are soluble in sodium hydroxide are: 1. $A s_{2} O_{3}$ 2. $S b_{2} O_{3}$ 3.SnO The correct options are:

Discussion

7.	The structure of CH2= C = CH2is
Answer» The structure of $C H_{2}$ = C = $C H_{2}$ is

Discussion

8.	Write the reason for the stability of colloidal sols.
Answer» Write the reason for the stability of colloidal sols.

Discussion

9.	Nylon 6, 6 has which monomer?
Answer» Nylon 6, 6 has which monomer?

Discussion

10.	Give reasons for the following : (i) Ethyl iodide undergoes SN2 reaction faster than ethylbromide. (ii) (±)2 - Butanol is optically inactive. (iii) C - X bond length in halobenzene is smaller than C - X bond length in CH3−X.
Answer» Give reasons for the following : (i) Ethyl iodide undergoes $S_{N} 2$ reaction faster than ethylbromide. (ii) $(\pm)$ 2 - Butanol is optically inactive. (iii) C - X bond length in halobenzene is smaller than C - X bond length in $C H_{3} - X .$

Discussion

11.	Match List I with List II and select the correct answer using the codes given below the lists List I (pollutant) List II (Source) (A) Micro organisms (1) Chemical fertilizers (B) Plant nutrients (2) Abandoned coal mines (C) Sediments (3) Domestic sewage (D) Mineral acids (4) Erosion of soil by strip mining (5) Detergents
Answer» Match List I with List II and select the correct answer using the codes given below the lists $L i s t I (p o l l u t a n t) L i s t I I (S o u r c e)$ (A) $M i c r o o r g a n i s m s (1) C h e m i c a l f e r t i l i z e r s$ (B) $P l a n t n u t r i e n t s (2) A b a n d o n e d c o a l m i n e s$ (C) $S e d i m e n t s (3) D o m e s t i c s e w a g e$ (D) $M i n e r a l a c i d s (4) E r o s i o n o f s o i l b y s t r i p m i n i n g$ $(5) D e t e r g e n t s$

11.

Match List I with List II and select the correct answer using the codes given below the lists List I (pollutant) List II (Source) (A) Micro organisms (1) Chemical fertilizers (B) Plant nutrients (2) Abandoned coal mines (C) Sediments (3) Domestic sewage (D) Mineral acids (4) Erosion of soil by strip mining (5) Detergents

Answer»

Match List I with List II and select the correct answer using the codes given below the lists

$L i s t I (p o l l u t a n t) L i s t I I (S o u r c e)$

(A) $M i c r o o r g a n i s m s (1) C h e m i c a l f e r t i l i z e r s$

(B) $P l a n t n u t r i e n t s (2) A b a n d o n e d c o a l m i n e s$

(C) $S e d i m e n t s (3) D o m e s t i c s e w a g e$

(D) $M i n e r a l a c i d s (4) E r o s i o n o f s o i l b y s t r i p m i n i n g$

$(5) D e t e r g e n t s$

Discussion

12.	If NaCl is doped with 10−4 mol% of SrCl2, the concentration of cation vacancies will be (N=6.02×1023 mol−1)
Answer» If NaCl is doped with $10^{- 4} m o l % o f S r C l_{2}$ , the concentration of cation vacancies will be ( $N = 6.02 \times 10^{23} m o l^{- 1}$ )

Discussion

13.	Which of the following is most soluble in water?
Answer» Which of the following is most soluble in water?

Discussion

14.	H2 + I2 = 2HI In the above equilibrium system if the concentration of the reactants at 25∘C is increased, the value of KC will
Answer» $H_{2} + I_{2} = 2 H I$ In the above equilibrium system if the concentration of the reactants at $25^{\circ} C$ is increased, the value of $K_{C}$ will

14.

H2 + I2 = 2HI In the above equilibrium system if the concentration of the reactants at 25∘C is increased, the value of KC will

Answer»

$H_{2} + I_{2} = 2 H I$ In the above equilibrium system if the concentration of the reactants at $25^{\circ} C$ is increased, the value of $K_{C}$ will

Discussion

15.	The electronic configuration of Ag atom is
Answer» The electronic configuration of Ag atom is

Discussion

16.	In Nessler’s reagent, the ion present is
Answer» In Nessler’s reagent, the ion present is

Discussion

17.	An exothermic chemical reaction proceeds by two stages: Reactantsstage 1→Intermediatestage 2→Products The activation energy of stage 1 is 50 kJ/mol. The overall enthalpy change of the reaction is −100 kJ/mol. Which diagram could represent the energy level diagram for the other reaction.
Answer» An exothermic chemical reaction proceeds by two stages: $Reactants stage 1 \to Intermediate stage 2 \to Products$ The activation energy of stage 1 is $50 kJ/mol$ . The overall enthalpy change of the reaction is $- 100 kJ/mol$ . Which diagram could represent the energy level diagram for the other reaction.

Discussion

18.	Hope we easily found the Peroxide ion and super oxide ion Is there any trick to that.. Plz tell me
Answer» Hope we easily found the Peroxide ion and super oxide ion Is there any trick to that.. Plz tell me

18.

Hope we easily found the Peroxide ion and super oxide ion Is there any trick to that.. Plz tell me

Answer»

Hope we easily found the

Peroxide ion and super oxide ion

Is there any trick to that..

Plz tell me

Discussion

19.	Which of the following is/are soft bases? H2O, H−, CO, CO2, C2H4, CN−
Answer» Which of the following is/are soft bases? $H_{2} O, H^{-}, C O, C O_{2}, C_{2} H_{4}, C N^{-}$

Discussion

20.	The following is not a function of an impurity present in a crystal[MP PET 1995]
Answer» The following is not a function of an impurity present in a crystal [MP PET 1995]

20.

The following is not a function of an impurity present in a crystal[MP PET 1995]

Answer»

The following is not a function of an impurity present in a crystal

[MP PET 1995]

Discussion

21.	Which of the following is the example of SN2 reaction?
Answer» Which of the following is the example of $S N^{2}$ reaction?

Discussion

22.	Which of the following is employed as an antihistamine?
Answer» Which of the following is employed as an antihistamine?

Discussion

23.	Question 33 Explain the shape of BrF5.
Answer» Question 33 Explain the shape of $B r F_{5}$ .

23.

Question 33 Explain the shape of BrF5.

Answer»

Question 33

Explain the shape of $B r F_{5}$ .

Discussion

24.	Number of structures possible with C4H8 witch can decolourise pink permanganate solution.
Answer» Number of structures possible with $C_{4} H_{8}$ witch can decolourise pink permanganate solution.

Discussion

25.	10.30 mg of O2 dissolved into a litre of sea water of density 1.03g/mL. The concentration of O2 in ppm is
Answer» 10.30 mg of $O_{2}$ dissolved into a litre of sea water of density 1.03g/mL. The concentration of $O_{2}$ in ppm is

Discussion

26.	Concentration of the reactant in first order is reduced to 1e2 after
Answer» Concentration of the reactant in first order is reduced to ${\frac{1}{e}}^{2}$ after

Discussion

27.	At time t = 0, some radioactive gas is injected into a sealed vessel. At time T, some more of the same gas is injected into the same vessel. Which one of the following graphs best represents the variation of the logarithm of the activity A of the gas with time t?
Answer» At time t = 0, some radioactive gas is injected into a sealed vessel. At time T, some more of the same gas is injected into the same vessel. Which one of the following graphs best represents the variation of the logarithm of the activity A of the gas with time t?

Discussion

28.	The product (C) of above reaction is:
Answer» The product (C) of above reaction is:

Discussion

29.	An alloy of two metals A and B has cubic close packing structure, where atoms of B occupy lattice points and atoms of A occupies 25% of the tetrahedral voids. The composition of the alloy is
Answer» An alloy of two metals A and B has cubic close packing structure, where atoms of B occupy lattice points and atoms of A occupies 25% of the tetrahedral voids. The composition of the alloy is

Discussion

30.	A closed vessel with rigid walls contains 1mole of 23892U and 1 mole 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 contains 1mole of $_{92}^{238} U$ and 1 mole 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

31.	Which of the following compounds would liberate CO2 on heating?
Answer» Which of the following compounds would liberate $C O_{2}$ on heating?

Discussion

32.	An alkyl halide with molecular formula C6H13Br on dehydro halogenation gave two isomeric alkenes X and Y with molecular formula C6H12. On reductive Ozonolysis, X and Y gave four compounds CH3COCH3,CH3CHO,CH3CH2CHO and (CH3)2 CHCHO. The alkyl halide is
Answer» An alkyl halide with molecular formula C₆H₁₃Br on dehydro halogenation gave two isomeric alkenes X and Y with molecular formula C₆H₁₂. On reductive Ozonolysis, X and Y gave four compounds CH₃COCH₃,CH₃CHO,CH₃CH₂CHO and (CH₃)₂ CHCHO. The alkyl halide is

Discussion

33.	Total pressure of a mixture of H2 and O2 is 1.0 bar. The mixture is allowed to react to form water, which is completely removed to leave only pure H2 at a pressure of 0.34 bar. Assuming ideal gas behaviour and that all pressure measurements were made under the same temperature and volume conditions, the composition of the original mixture is:
Answer» Total pressure of a mixture of $H_{2}$ and $O_{2}$ is 1.0 bar. The mixture is allowed to react to form water, which is completely removed to leave only pure $H_{2}$ at a pressure of 0.34 bar. Assuming ideal gas behaviour and that all pressure measurements were made under the same temperature and volume conditions, the composition of the original mixture is:

Discussion

34.	Write the reaction between aluminium and dilute hydrochloric acid.
Answer» Write the reaction between aluminium and dilute hydrochloric acid.

Discussion

35.	The base imidazole has Kb of 1.0×10−7. What volumes of 0.02 M HCl and 0.02 M imidazole should be mixed to make 150 mL of a buffer of pH 7 ?
Answer» The base imidazole has $K_{b}$ of $1.0 \times 10^{- 7}$ . What volumes of 0.02 M HCl and 0.02 M imidazole should be mixed to make 150 mL of a buffer of pH 7 ?

Discussion

36.	Which of the following is true for the sum of degree of freedom of following molecules. Cl2, He, Ar, SO2, CS2
Answer» Which of the following is true for the sum of degree of freedom of following molecules. $C l_{2}$ , $H e$ , $A r$ , $S O_{2}$ , $C S_{2}$

Discussion

37.	Which of the following halides will be most reactive in SN2 reaction and SN1 reaction, respectively?
Answer» Which of the following halides will be most reactive in $S_{N} 2$ reaction and $S_{N} 1$ reaction, respectively?

37.

Which of the following halides will be most reactive in SN2 reaction and SN1 reaction, respectively?

Answer»

Which of the following halides will be most reactive in $S_{N} 2$ reaction and $S_{N} 1$ reaction, respectively?

Discussion

38.	Chlorination of isobutane mainly gives
Answer» Chlorination of isobutane mainly gives

Discussion

39.	A 25 watt bulb emits monochromatic yellow light of wavelength of 0.57µm. Calculate the rate of emission of quanta per second.
Answer» A 25 watt bulb emits monochromatic yellow light of wavelength of 0.57µm. Calculate the rate of emission of quanta per second.

Discussion

40.	The pressure of a 1:4 mixture by moles of dihydrogen and dioxygen enclosed in a vessel is one bar. What will be the partial pressure of dioxygen?
Answer» The pressure of a $1 : 4$ mixture by moles of dihydrogen and dioxygen enclosed in a vessel is one bar. What will be the partial pressure of dioxygen?

Discussion

41.	Calculate the lattice enthalpy of CaCl2 , given that : Enthalpy of sublimation for Ca(s) → Ca(g) = 121 kJ mol−1 Enthalpy of dissociation of Cl2(g) → 2Cl(g) =242.8 kJ mol−1 Ionisation energy of Ca(g)→ Ca++(g) =2422 kJ mol−1 Electron gain enthalpy of 2Cl→ 2Cl−1=(2×−355) kJ mol−1=−710 kJ mol−1 Enthalpy of formation of CaCl2=−795 kJ mol−1
Answer» Calculate the lattice enthalpy of $C a C l_{2}$ , given that : Enthalpy of sublimation for $C a (s) \to C a (g) = 121 k J m o l^{- 1}$ Enthalpy of dissociation of $C l_{2} (g) \to 2 C l (g) = 242.8 k J m o l^{- 1}$ Ionisation energy of $C a (g) \to C a^{+ +} (g) = 2422 k J m o l^{- 1}$ Electron gain enthalpy of $2 C l \to 2 C l^{- 1} = (2 \times - 355) k J m o l^{- 1} = - 710 k J m o l^{- 1}$ Enthalpy of formation of $C a C l_{2} = - 795 k J m o l^{- 1}$

Discussion

42.	The specific heat of a gas in a polytropic process is given by -
Answer» The specific heat of a gas in a polytropic process is given by -

Discussion

43.	Which of the following will be the product of the given reaction?
Answer» Which of the following will be the product of the given reaction?

Discussion

44.	A gaseous mixture containing CO, CH4 and N2 gas has total volume of 40 mL. This mixture is exploded with excess of oxygen, on cooling 30 mL of contraction is observed and when this mixture is treated with aqueous KOH a further contraction of 30 mL is observed. Find the composition of the mixture in mL.
Answer» A gaseous mixture containing $C O$ , $C H_{4}$ and $N_{2}$ gas has total volume of 40 $m L$ . This mixture is exploded with excess of oxygen, on cooling 30 $m L$ of contraction is observed and when this mixture is treated with aqueous $K O H$ a further contraction of 30 $m L$ is observed. Find the composition of the mixture in $m L$ .

Discussion

45.	Why are aquatic species more comfortable in cold water in comparison to warm water?
Answer» Why are aquatic species more comfortable in cold water in comparison to warm water?

Discussion

46.	What is the reason behind , light acquiring an automatic phase change of 180 when it gets reflected on an optically denser surface?
Answer» What is the reason behind , light acquiring an automatic phase change of 180 when it gets reflected on an optically denser surface?

Discussion

47.	What are organometallic compounds
Answer» What are organometallic compounds

Discussion

48.	The difference between Cp and Cv is equal to
Answer» The difference between Cp and Cv is equal to

Discussion

49.	An excess of AgNO3 is added to 100ml of 0.01 M solution of dichloridotetraaquachromium (III) chloride. The number of moles of AgCl precipitated would be
Answer» An excess of $A g N O_{3}$ is added to 100ml of 0.01 M solution of dichloridotetraaquachromium (III) chloride. The number of moles of AgCl precipitated would be

Discussion

50.	Number of nodal planes in π∗ 2px orbital are
Answer» Number of nodal planes in $π^{*} 2 p x$ orbital are

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

In a set of reaction acetic acid generates product D CH3COOHSOCl2−−−−→ABengene−−−−−−−→Anhy AlCl3BHCN−−−→CHOH−−−→D The structure of D would be

charge to mass ration of neutron?

Correct order of negative electron gain enthalpy is:

Are the elements having high negative electron gain enthalpy more electronegative?

In the following sequence of reactions, the product (B) is CH3CHOHCN−−−→(A)H2O−−→(B)

The oxides which are soluble in sodium hydroxide are: 1. As2O3 2.Sb2O3 3.SnO The correct options are:

The structure of CH2= C = CH2is

Write the reason for the stability of colloidal sols.

Nylon 6, 6 has which monomer?

Give reasons for the following : (i) Ethyl iodide undergoes SN2 reaction faster than ethylbromide. (ii) (±)2 - Butanol is optically inactive. (iii) C - X bond length in halobenzene is smaller than C - X bond length in CH3−X.

If NaCl is doped with 10−4 mol% of SrCl2, the concentration of cation vacancies will be (N=6.02×1023 mol−1)

Which of the following is most soluble in water?

H2 + I2 = 2HI In the above equilibrium system if the concentration of the reactants at 25∘C is increased, the value of KC will

The electronic configuration of Ag atom is

In Nessler’s reagent, the ion present is

An exothermic chemical reaction proceeds by two stages: Reactantsstage 1→Intermediatestage 2→Products The activation energy of stage 1 is 50 kJ/mol. The overall enthalpy change of the reaction is −100 kJ/mol. Which diagram could represent the energy level diagram for the other reaction.

Hope we easily found the Peroxide ion and super oxide ion Is there any trick to that.. Plz tell me

Which of the following is/are soft bases? H2O, H−, CO, CO2, C2H4, CN−

The following is not a function of an impurity present in a crystal[MP PET 1995]

Which of the following is the example of SN2 reaction?

Which of the following is employed as an antihistamine?

Question 33 Explain the shape of BrF5.

Number of structures possible with C4H8 witch can decolourise pink permanganate solution.

10.30 mg of O2 dissolved into a litre of sea water of density 1.03g/mL. The concentration of O2 in ppm is

Concentration of the reactant in first order is reduced to 1e2 after

At time t = 0, some radioactive gas is injected into a sealed vessel. At time T, some more of the same gas is injected into the same vessel. Which one of the following graphs best represents the variation of the logarithm of the activity A of the gas with time t?

The product (C) of above reaction is:

An alloy of two metals A and B has cubic close packing structure, where atoms of B occupy lattice points and atoms of A occupies 25% of the tetrahedral voids. The composition of the alloy is

A closed vessel with rigid walls contains 1mole of 23892U and 1 mole 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 ___

Which of the following compounds would liberate CO2 on heating?

An alkyl halide with molecular formula C6H13Br on dehydro halogenation gave two isomeric alkenes X and Y with molecular formula C6H12. On reductive Ozonolysis, X and Y gave four compounds CH3COCH3,CH3CHO,CH3CH2CHO and (CH3)2 CHCHO. The alkyl halide is

Write the reaction between aluminium and dilute hydrochloric acid.

The base imidazole has Kb of 1.0×10−7. What volumes of 0.02 M HCl and 0.02 M imidazole should be mixed to make 150 mL of a buffer of pH 7 ?

Which of the following is true for the sum of degree of freedom of following molecules. Cl2, He, Ar, SO2, CS2

Which of the following halides will be most reactive in SN2 reaction and SN1 reaction, respectively?

Chlorination of isobutane mainly gives

A 25 watt bulb emits monochromatic yellow light of wavelength of 0.57µm. Calculate the rate of emission of quanta per second.

The pressure of a 1:4 mixture by moles of dihydrogen and dioxygen enclosed in a vessel is one bar. What will be the partial pressure of dioxygen?

The specific heat of a gas in a polytropic process is given by -

Which of the following will be the product of the given reaction?

Why are aquatic species more comfortable in cold water in comparison to warm water?

What is the reason behind , light acquiring an automatic phase change of 180 when it gets reflected on an optically denser surface?

What are organometallic compounds

The difference between Cp and Cv is equal to

An excess of AgNO3 is added to 100ml of 0.01 M solution of dichloridotetraaquachromium (III) chloride. The number of moles of AgCl precipitated would be

Number of nodal planes in π∗ 2px orbital are