46295 + Interview Questions in Chemistry

1.	Which one of the following statements is correct [MP PET 1997]
Answer» Which one of the following statements is correct [MP PET 1997]

1.

Which one of the following statements is correct [MP PET 1997]

Answer»

Which one of the following statements is correct

[MP PET 1997]

2.	If a bromine atom is available in the form of say two isotopes 7935Br(49.7%) and 8135Br (50.3%), calculate the average atomic mass of the bromine atom.
Answer» If a bromine atom is available in the form of say two isotopes $_{35}^{79} B r$ (49.7%) and $_{35}^{81} B r$ (50.3%), calculate the average atomic mass of the bromine atom.

Discussion

3.	Chlorobenzeneconc H2SO4, conc HNO3−−−−−−−−−−−−−−−→ΔAi. KOH, Δ−−−−−−→ii. H+(B) (B)Br2/H2O−−−−−→(1 equiv.)(C)Sn/HCl−−−−−→(D)Ac2O−−−−−→(1 equiv.)(E) E will be:
Answer» $Chlorobenzene conc H_{2} S O_{4}, conc H N O_{3} - -------------- \to Δ A i . K O H, Δ - ----- \to i i . H^{+} (B)$ $(B) B r_{2} / H_{2} O - ---- \to (1 equiv.) (C) S n / H C l - ---- \to (D) A c_{2} O - ---- \to (1 equiv.) (E)$ E will be:

Discussion

4.	2 An element crystallises in FCC lattice having edge length 400pm.The maximum diameter which can be placed in interstitial sites without disturbing the structure is (a)1.171pm (b)11.71pm (c)117.1pm. (d)0.117pm
Answer» 2 An element crystallises in FCC lattice having edge length 400pm.The maximum diameter which can be placed in interstitial sites without disturbing the structure is (a)1.171pm (b)11.71pm (c)117.1pm. (d)0.117pm

Discussion

5.	What is dimensions?
Answer» What is dimensions?

Discussion

6.	For thefollowing bond cleavages, use curved-arrows to show the electron flowand classify each as homolysis or heterolysis. Identify reactiveintermediate produced as free radical, carbocation and carbanion.(a) (b) (c) (d)
Answer» For the following bond cleavages, use curved-arrows to show the electron flow and classify each as homolysis or heterolysis. Identify reactive intermediate produced as free radical, carbocation and carbanion. (a) (b) (c) (d)

6.

For thefollowing bond cleavages, use curved-arrows to show the electron flowand classify each as homolysis or heterolysis. Identify reactiveintermediate produced as free radical, carbocation and carbanion.(a) (b) (c) (d)

Answer»

For the
following bond cleavages, use curved-arrows to show the electron flow
and classify each as homolysis or heterolysis. Identify reactive
intermediate produced as free radical, carbocation and carbanion.

(a)

(b)

(c)

(d)

Discussion

7.	Calculate the amount of ice that will separate out on cooling a solution containing 50 g of ethylene glycol in 200 g water from 0∘C to −9.3∘C. (Kf for water = 1.86 K kg mol−1).
Answer» Calculate the amount of ice that will separate out on cooling a solution containing $50 g$ of ethylene glycol in $200 g$ water from $0^{\circ} C$ to $- {9.3}^{\circ} C$ . ( $K_{f}$ for water = 1.86 K kg $m o l^{- 1}$ ).

Discussion

8.	in nucleophilic substitution reaction in chloro benzene why ewg at para and ortho position increases reactivi
Answer» in nucleophilic substitution reaction in chloro benzene why ewg at para and ortho position increases reactivi

Discussion

9.	Which of the following is correct structure of 3,3-Dibromo-2-chlorobutyl-2-methyl propanoate?
Answer» Which of the following is correct structure of 3,3-Dibromo-2-chlorobutyl-2-methyl propanoate?

Discussion

10.	43. Cl, reacts with ammonia in excess to form a gaseous product 'A' & another compound B', whichheating with caustic soda gives another gaseous productThe hybridisation of central atom in C &shape of 'C" are respectively1) sp, linear2) sp trigonal planar 3) sp3, pyramidal4) sptetrahedra
Answer» 43. Cl, reacts with ammonia in excess to form a gaseous product 'A' & another compound B', whichheating with caustic soda gives another gaseous productThe hybridisation of central atom in C &shape of 'C" are respectively1) sp, linear2) sp trigonal planar 3) sp3, pyramidal4) sptetrahedra

Discussion

11.	Concentrated aqueous sulphuric acid is 98% H_2SO_4 (w/v) and has a density of 1.80 g/ml. What is the molarity of the solution
Answer» Concentrated aqueous sulphuric acid is 98% H_2SO_4 (w/v) and has a density of 1.80 g/ml. What is the molarity of the solution

Discussion

12.	Freezing point of water is 0∘C. At what temperature will one molal solution of NaCl freeze, if NaCl is taken to be completely dissociated?(Molal depression constant of water =1.86 Co kg mol−1)
Answer» Freezing point of water is $0^{\circ} C$ . At what temperature will one molal solution of $N a C l$ freeze, if $N a C l$ is taken to be completely dissociated? $(Molal depression constant of water = 1.86 C^{o} k g m o l^{- 1})$

Discussion

13.	Arrange the following compounds in the increasing orders of their melting point.I.AgI II.NaI III.CuI IV.NaCl
Answer» Arrange the following compounds in the increasing orders of their melting point. $I . A g I$ $II . N a I$ $III . C u I$ $IV . N a C l$

Discussion

14.	The compound having both sp&sp2 hybridized carbon is
Answer» The compound having both $s p & s p^{2}$ hybridized carbon is

Discussion

15.	2 M of 100 ml sodium sulphate is mixed with 3 M of 100 ml sodium chloride solution and 1 M of 200 ml calcium chloride solution then the ratio of concentration of cation and anion is
Answer» 2 M of 100 ml sodium sulphate is mixed with 3 M of 100 ml sodium chloride solution and 1 M of 200 ml calcium chloride solution then the ratio of concentration of cation and anion is

Discussion

16.	Which of the following compounds undergoes addition reaction with HBr most easily?
Answer» Which of the following compounds undergoes addition reaction with $H B r$ most easily?

Discussion

17.	The maximum kinetic energy of the photoelectrons is found to be 6.63 × 10−19 J. When the metal is irradiated with a radiation of frequency 2 × 1015 Hz, the threshold frequency of the metal is about
Answer» The maximum kinetic energy of the photoelectrons is found to be $6.63 \times 10^{- 19} J$ . When the metal is irradiated with a radiation of frequency $2 \times 10^{15} H z$ , the threshold frequency of the metal is about

Discussion

18.	20. Lithium crystallizes in a body-centered cubic lattice, how many next nearest neighbours does each Lithium has ? 1. 8 2. 6 3. 12 4. 4
Answer» 20. Lithium crystallizes in a body-centered cubic lattice, how many next nearest neighbours does each Lithium has ? 1. 8 2. 6 3. 12 4. 4

Discussion

19.	What is meant by common ion effect?
Answer» What is meant by common ion effect?

Discussion

20.	Which of the following have a bond angle more than 120∘ ?
Answer» Which of the following have a bond angle more than $120^{\circ}$ ?

Discussion

21.	Hyper conjugation is not possible in
Answer» Hyper conjugation is not possible in

Discussion

22.	For the process to occur under adiabatic conditions, the correct condition is: (i) ΔT = 0 (ii) Δp = 0 (iii) q = 0 (iv) w = 0
Answer» For the process to occur under adiabatic conditions, the correct condition is: (i) ΔT = 0 (ii) Δp = 0 (iii) q = 0 (iv) w = 0

22.

For the process to occur under adiabatic conditions, the correct condition is: (i) ΔT = 0 (ii) Δp = 0 (iii) q = 0 (iv) w = 0

Answer»

For
the process to occur under adiabatic conditions, the correct
condition is:

(i) ΔT
= 0

(ii) Δp
= 0

(iii) q
= 0

(iv) w
= 0

Discussion

23.	The only correct combination in which the reaction intermediate is di-chloro carbene
Answer» The only correct combination in which the reaction intermediate is di-chloro carbene

Discussion

24.	Normality is defined as:
Answer» Normality is defined as:

Discussion

25.	The mass ratio of oxygen and nitrogen of a particular gaseous mixture is 1:4. The ratio of number of their molecule is
Answer» The mass ratio of oxygen and nitrogen of a particular gaseous mixture is 1:4. The ratio of number of their molecule is

Discussion

26.	Why in hybridisation lone pairs get counted in case of H2O(water) but not counted in case of COCl2
Answer» Why in hybridisation lone pairs get counted in case of H2O(water) but not counted in case of COCl2

Discussion

27.	Prove that A-B = {} iff A is improper subset of B
Answer» Prove that A-B = {} iff A is improper subset of B

Discussion

28.	How to study for KVPY stream SA
Answer» How to study for KVPY stream SA

Discussion

29.	The outer orbitals of C in ethene molecules can be considered to be hybridized to give three equivalent sp2 orbitals. The total number of sigma and pi bonds in ethene molecule is 1) 1 sigma and 2 pi bonds 2) 3 sigma and 2 pi bonds 3) 4 sigma and 1 pi bonds 4) 5 sigma and 1 pi bonds
Answer» The outer orbitals of C in ethene molecules can be considered to be hybridized to give three equivalent sp2 orbitals. The total number of sigma and pi bonds in ethene molecule is 1) 1 sigma and 2 pi bonds 2) 3 sigma and 2 pi bonds 3) 4 sigma and 1 pi bonds 4) 5 sigma and 1 pi bonds

Discussion

30.	What r polyester used for
Answer» What r polyester used for

Discussion

31.	3. why ice will float in water?
Answer» 3. why ice will float in water?

Discussion

32.	A solution contain 25%water,25%ethanol and 50%acetic acid by mass.calculate the mole fraction of each component.
Answer» A solution contain 25%water,25%ethanol and 50%acetic acid by mass.calculate the mole fraction of each component.

Discussion

33.	On heating aqueous solution of benzene diazonium chloride, which is formed [CPMT 1988; BHU 1980]
Answer» On heating aqueous solution of benzene diazonium chloride, which is formed [CPMT 1988; BHU 1980]

Discussion

34.	Number of spectral lines falling in Balmer series whenelectrons are de-excited from nth shell will be givenas(1) (n- 2) in UV(2) (n- 2) in visible region(3) (n-3) in near IR(4) (n-3) in far IR
Answer» Number of spectral lines falling in Balmer series whenelectrons are de-excited from nth shell will be givenas(1) (n- 2) in UV(2) (n- 2) in visible region(3) (n-3) in near IR(4) (n-3) in far IR

Discussion

35.	Which of the following is strongest base also justify .(3)HCO3-(4)H-
Answer» Which of the following is strongest base also justify . (3)HCO3- (4)H-

Discussion

36.	10 drops of an oleic acid solution of concentration 1/400 cm3per cm3 of alcohol,are dropped on a water.the circular film does produced has radius 10 centimetre find the molecular size of oleic acid if the radius of each drop is 1.4 mm
Answer» 10 drops of an oleic acid solution of concentration 1/400 cm3per cm3 of alcohol,are dropped on a water.the circular film does produced has radius 10 centimetre find the molecular size of oleic acid if the radius of each drop is 1.4 mm

Discussion

37.	Which of the following reactions will have a negative value of △S?
Answer» Which of the following reactions will have a negative value of $△ S$ ?

Discussion

38.	The product obtained as a result of a reaction of nitrogen with CaC2 is
Answer» The product obtained as a result of a reaction of nitrogen with $C a C_{2}$ is

Discussion

39.	In a first order reaction, if the time taken for completion of 50 percent of the reaction is t seconds, then the time required for completion of 99.9 percent of the reaction is
Answer» In a first order reaction, if the time taken for completion of $50$ percent of the reaction is $t$ seconds, then the time required for completion of $99.9$ percent of the reaction is

Discussion

40.	Cyclohexene on ozonolysis followed by reaction with zinc dust and water gives compound X. Compound X on further treatment with aqueous KOH yields compound Y. Compound Y is:
Answer» Cyclohexene on ozonolysis followed by reaction with zinc dust and water gives compound $X$ . Compound $X$ on further treatment with aqueous $K O H$ yields compound $Y$ . Compound $Y$ is:

Discussion

41.	Duringnuclear explosion, one of the products is 90Srwith half-life of 28.1 years. If 1μg of 90Srwas absorbed in the bones of a newly born baby instead of calcium,how much of it will remain after 10 years and 60 years if it is notlost metabolically.
Answer» During nuclear explosion, one of the products is ⁹⁰Sr with half-life of 28.1 years. If 1μg of ⁹⁰Sr was absorbed in the bones of a newly born baby instead of calcium, how much of it will remain after 10 years and 60 years if it is not lost metabolically.

Discussion

42.	HOW TO FIND VOLUME OF AN OBJECT USING INTEGRALS
Answer» HOW TO FIND VOLUME OF AN OBJECT USING INTEGRALS

Discussion

43.	A 400 mg iron capsule contains 100 mg of ferrous fumarate, (CHCOO)2 Fe. The percentage of iron present in it is approximately. A) 33% B) 25% C) 14% D) 8%
Answer» A 400 mg iron capsule contains 100 mg of ferrous fumarate, (CHCOO)2 Fe. The percentage of iron present in it is approximately. A) 33% B) 25% C) 14% D) 8%

Discussion

44.	37. The atomic weight of two elements A and B are 40 and 80 respectively. if x gram of A contains Y atoms how many atoms are present in 2 X gram of B?
Answer» 37. The atomic weight of two elements A and B are 40 and 80 respectively. if x gram of A contains Y atoms how many atoms are present in 2 X gram of B?

Discussion

45.	Na2B4O7.10H2OHeat−−−→X+NaBO2+H2O X+Cr2O3Heat−−−→YGreen colour X and Y are:
Answer» $N a_{2} B_{4} O_{7} .10 H_{2} O H e a t - -- \to X + N a B O_{2} + H_{2} O$ $X + C r_{2} O_{3} H e a t - -- \to Y G r e e n c o l o u r$ $X$ and $Y$ are:

Discussion

46.	When do we use the formula delta G=-nFE. and when do we use E=E0-0.059/nlogKc? Are there any specific conditions for using these two?
Answer» When do we use the formula delta G=-nFE. and when do we use E=E⁰-0.059/nlogKc? Are there any specific conditions for using these two?

46.

When do we use the formula delta G=-nFE. and when do we use E=E0-0.059/nlogKc? Are there any specific conditions for using these two?

Answer»

When do we use the formula delta G=-nFE. and when do we use E=E⁰-0.059/nlogKc?

Are there any specific conditions for using these two?

Discussion

47.	46. The wavelength of an electron revolving in the 3rd orbit of Be3+ is x. The radius of first Bohr orbit in H atom is k, then x is equal to 1) 3kπ/2 2) 2π/3k 3) 3k/π 4) 3kπ/4
Answer» 46. The wavelength of an electron revolving in the 3rd orbit of Be3+ is x. The radius of first Bohr orbit in H atom is k, then x is equal to 1) 3kπ/2 2) 2π/3k 3) 3k/π 4) 3kπ/4

Discussion

48.	The formula , M(V1+ V2) = M1V1 + M2V2 is applicable for reacting solutions or for non reacting solutions? What should be steps to find molarity of two reacting solutions when mixed .
Answer» The formula , M(V1+ V2) = M1V1 + M2V2 is applicable for reacting solutions or for non reacting solutions? What should be steps to find molarity of two reacting solutions when mixed .

Discussion

49.	what is carbene?
Answer» what is carbene?

Discussion

50.	41. Bond order of CCl4??
Answer» 41. Bond order of CCl4??

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which one of the following statements is correct [MP PET 1997]

If a bromine atom is available in the form of say two isotopes 7935Br(49.7%) and 8135Br (50.3%), calculate the average atomic mass of the bromine atom.

Chlorobenzeneconc H2SO4, conc HNO3−−−−−−−−−−−−−−−→ΔAi. KOH, Δ−−−−−−→ii. H+(B) (B)Br2/H2O−−−−−→(1 equiv.)(C)Sn/HCl−−−−−→(D)Ac2O−−−−−→(1 equiv.)(E) E will be:

2 An element crystallises in FCC lattice having edge length 400pm.The maximum diameter which can be placed in interstitial sites without disturbing the structure is (a)1.171pm (b)11.71pm (c)117.1pm. (d)0.117pm

What is dimensions?

For thefollowing bond cleavages, use curved-arrows to show the electron flowand classify each as homolysis or heterolysis. Identify reactiveintermediate produced as free radical, carbocation and carbanion.(a) (b) (c) (d)

Calculate the amount of ice that will separate out on cooling a solution containing 50 g of ethylene glycol in 200 g water from 0∘C to −9.3∘C. (Kf for water = 1.86 K kg mol−1).

in nucleophilic substitution reaction in chloro benzene why ewg at para and ortho position increases reactivi

Which of the following is correct structure of 3,3-Dibromo-2-chlorobutyl-2-methyl propanoate?

43. Cl, reacts with ammonia in excess to form a gaseous product 'A' & another compound B', whichheating with caustic soda gives another gaseous productThe hybridisation of central atom in C &shape of 'C" are respectively1) sp, linear2) sp trigonal planar 3) sp3, pyramidal4) sptetrahedra

Concentrated aqueous sulphuric acid is 98% H_2SO_4 (w/v) and has a density of 1.80 g/ml. What is the molarity of the solution

Freezing point of water is 0∘C. At what temperature will one molal solution of NaCl freeze, if NaCl is taken to be completely dissociated?(Molal depression constant of water =1.86 Co kg mol−1)

Arrange the following compounds in the increasing orders of their melting point.I.AgI II.NaI III.CuI IV.NaCl

The compound having both sp&amp;sp2 hybridized carbon is

2 M of 100 ml sodium sulphate is mixed with 3 M of 100 ml sodium chloride solution and 1 M of 200 ml calcium chloride solution then the ratio of concentration of cation and anion is

Which of the following compounds undergoes addition reaction with HBr most easily?

The maximum kinetic energy of the photoelectrons is found to be 6.63 × 10−19 J. When the metal is irradiated with a radiation of frequency 2 × 1015 Hz, the threshold frequency of the metal is about

20. Lithium crystallizes in a body-centered cubic lattice, how many next nearest neighbours does each Lithium has ? 1. 8 2. 6 3. 12 4. 4

What is meant by common ion effect?

Which of the following have a bond angle more than 120∘ ?

Hyper conjugation is not possible in

For the process to occur under adiabatic conditions, the correct condition is: (i) ΔT = 0 (ii) Δp = 0 (iii) q = 0 (iv) w = 0

The only correct combination in which the reaction intermediate is di-chloro carbene

Normality is defined as:

The mass ratio of oxygen and nitrogen of a particular gaseous mixture is 1:4. The ratio of number of their molecule is

Why in hybridisation lone pairs get counted in case of H2O(water) but not counted in case of COCl2

Prove that A-B = {} iff A is improper subset of B

How to study for KVPY stream SA

The outer orbitals of C in ethene molecules can be considered to be hybridized to give three equivalent sp2 orbitals. The total number of sigma and pi bonds in ethene molecule is 1) 1 sigma and 2 pi bonds 2) 3 sigma and 2 pi bonds 3) 4 sigma and 1 pi bonds 4) 5 sigma and 1 pi bonds

What r polyester used for

3. why ice will float in water?

A solution contain 25%water,25%ethanol and 50%acetic acid by mass.calculate the mole fraction of each component.

On heating aqueous solution of benzene diazonium chloride, which is formed [CPMT 1988; BHU 1980]

Number of spectral lines falling in Balmer series whenelectrons are de-excited from nth shell will be givenas(1) (n- 2) in UV(2) (n- 2) in visible region(3) (n-3) in near IR(4) (n-3) in far IR

Which of the following is strongest base also justify .(3)HCO3-(4)H-

10 drops of an oleic acid solution of concentration 1/400 cm3per cm3 of alcohol,are dropped on a water.the circular film does produced has radius 10 centimetre find the molecular size of oleic acid if the radius of each drop is 1.4 mm

Which of the following reactions will have a negative value of △S?

The product obtained as a result of a reaction of nitrogen with CaC2 is

In a first order reaction, if the time taken for completion of 50 percent of the reaction is t seconds, then the time required for completion of 99.9 percent of the reaction is

Cyclohexene on ozonolysis followed by reaction with zinc dust and water gives compound X. Compound X on further treatment with aqueous KOH yields compound Y. Compound Y is:

Duringnuclear explosion, one of the products is 90Srwith half-life of 28.1 years. If 1μg of 90Srwas absorbed in the bones of a newly born baby instead of calcium,how much of it will remain after 10 years and 60 years if it is notlost metabolically.

HOW TO FIND VOLUME OF AN OBJECT USING INTEGRALS

A 400 mg iron capsule contains 100 mg of ferrous fumarate, (CHCOO)2 Fe. The percentage of iron present in it is approximately. A) 33% B) 25% C) 14% D) 8%

37. The atomic weight of two elements A and B are 40 and 80 respectively. if x gram of A contains Y atoms how many atoms are present in 2 X gram of B?

Na2B4O7.10H2OHeat−−−→X+NaBO2+H2O X+Cr2O3Heat−−−→YGreen colour X and Y are:

When do we use the formula delta G=-nFE. and when do we use E=E0-0.059/nlogKc? Are there any specific conditions for using these two?

46. The wavelength of an electron revolving in the 3rd orbit of Be3+ is x. The radius of first Bohr orbit in H atom is k, then x is equal to 1) 3kπ/2 2) 2π/3k 3) 3k/π 4) 3kπ/4

The formula , M(V1+ V2) = M1V1 + M2V2 is applicable for reacting solutions or for non reacting solutions? What should be steps to find molarity of two reacting solutions when mixed .

what is carbene?

41. Bond order of CCl4??

The compound having both sp&sp2 hybridized carbon is