46295 + Interview Questions in Chemistry

1.	Compound A, C8H10O, is found to react with NaOI (produced by reacting Y with NaOH) and yields a yellow precipitate with characteristic smell. A and Y are respectively:
Answer» Compound A, $C_{8} H_{10} O$ , is found to react with $N a O I$ (produced by reacting $Y$ with $N a O H)$ and yields a yellow precipitate with characteristic smell. $A$ and $Y$ are respectively:

Discussion

2.	19.How conservation of mass is explained in law of conservation of energy itself.
Answer» 19.How conservation of mass is explained in law of conservation of energy itself.

Discussion

3.	Lead pipes are not suitable for drinking water because
Answer» Lead pipes are not suitable for drinking water because

3.

Lead pipes are not suitable for drinking water because

Answer»

Lead pipes are not suitable for drinking water because

Discussion

4.	A mineral consists of an equimolar mixture of the carbonates of two bivalent metals. One metal is present to the extent of 20% by weight. 3.0 g of the mineral on heating lost 1.1 g of CO2. What is the % by weight of the other metal?
Answer» A mineral consists of an equimolar mixture of the carbonates of two bivalent metals. One metal is present to the extent of $20 %$ by weight. $3.0 g$ of the mineral on heating lost $1.1 g$ of $C O_{2}$ . What is the $%$ by weight of the other metal?

Discussion

5.	The reaction(s) leading to the formation of 1,3,5-trimethylbenzene is/are:
Answer» The reaction(s) leading to the formation of 1,3,5-trimethylbenzene is/are:

Discussion

6.	The empirical formula of a commercial ion exchange resin is C8H7SO3Na(M.M=206). The resin can be used to soften water according to the reaction: Ca2++2C8H7SO3Na→Ca(C8H7SO3)2+2Na+ What would be the maximum uptake of Ca2+ by the resin expressed in mol/g of resin?
Answer» The empirical formula of a commercial ion exchange resin is $C_{8} H_{7} S O_{3} N a (M . M = 206)$ . The resin can be used to soften water according to the reaction: $C a^{2 +} + 2 C_{8} H_{7} S O_{3} N a \to C a (C_{8} H_{7} S O_{3})_{2} + 2 N a^{+}$ What would be the maximum uptake of $C a^{2 +}$ by the resin expressed in $mol/g$ of resin?

Discussion

7.	Acetoacetic ester is made by the process of:
Answer» Acetoacetic ester is made by the process of:

Discussion

8.	The heats of neutralisation of CH3COOH, HCOOH, HCN and H2S are -12.8, -13.2, -3.2 and -3.9 kcal per equivalent. Arrange these acids in increasing order of strength.
Answer» The heats of neutralisation of $C H_{3} C O O H$ , HCOOH, HCN and $H_{2} S$ are -12.8, -13.2, -3.2 and -3.9 kcal per equivalent. Arrange these acids in increasing order of strength.

Discussion

9.	Ion with highest polarizing power is ______.
Answer» Ion with highest polarizing power is ______.

Discussion

10.	Molecular formula of Glauber’s salt is
Answer» Molecular formula of Glauber’s salt is

Discussion

11.	88. draw lewis structure of socl2. and explain shape and hybridisations of NO and NO2 NO3
Answer» 88. draw lewis structure of socl2. and explain shape and hybridisations of NO and NO2 NO3

Discussion

12.	For the reaction 2NO(g)+2H2(g)→N2(g)+2H2O(g)The rate expression can be written in the following waysd[N2]dt=k1[NO][H2]d[H2O]dt=k[NO][H2]−d[NO]dt=k′1[NO][H2]−d[H2]dt=k′′1[NO][H2]The relationship betyween k,k1,k′1 and k′′1
Answer» For the reaction $2 N O (g) + 2 H_{2} (g) \to N_{2} (g) + 2 H_{2} O (g)$ The rate expression can be written in the following ways $\frac{d [N_{2}]}{d t} = k_{1} [N O] [H_{2}] \frac{d [H_{2} O]}{d t} = k [N O] [H_{2}] - \frac{d [N O]}{d t} = k_{1}^{'} [N O] [H_{2}] - \frac{d [H_{2}]}{d t} = k_{1}^{''} [N O] [H_{2}]$ The relationship betyween $k, k_{1}, k_{1}^{'}$ and $k_{1}^{''}$

Discussion

13.	The drain cleaner, Drainex contains small bits of Aluminium which react with caustic soda to produce dihydrogen. What volume of dihydrogen at 20 degree C and one bar will be released when 0.15 g of Aluminium reacts ?
Answer» The drain cleaner, Drainex contains small bits of Aluminium which react with caustic soda to produce dihydrogen. What volume of dihydrogen at 20 degree C and one bar will be released when 0.15 g of Aluminium reacts ?

Discussion

14.	the identical flasks X and Y contain 64g of methane and 100g of unknown gas A2 respectively at 2 atm and 300K. the vapour density of the gas A2 will be 1. 50 2. 37.5 3. 25 4. 12.5
Answer» the identical flasks X and Y contain 64g of methane and 100g of unknown gas A2 respectively at 2 atm and 300K. the vapour density of the gas A2 will be 1. 50 2. 37.5 3. 25 4. 12.5

Discussion

15.	A metal forms two oxides. The higher oxidecontains 80% metal. 0.72 g of the lower oxide gave0.8 g of higher oxide when oxidised. Then the atioof the weight of oxygen that combines with the fixed weight of the metal in the two oxides will b
Answer» A metal forms two oxides. The higher oxidecontains 80% metal. 0.72 g of the lower oxide gave0.8 g of higher oxide when oxidised. Then the atioof the weight of oxygen that combines with the fixed weight of the metal in the two oxides will b

Discussion

16.	Thedecomposition of dimethyl ether leads to the formation of CH4,H2and CO and the reaction rate is given byRate= k[CH3OCH3]3/2Therate of reaction is followed by increase in pressure in a closedvessel, so the rate can also be expressed in terms of the partialpressure of dimethyl ether, i.e.,Ifthe pressure is measured in bar andtime inminutes, then what are the units of rate and rate constants?
Answer» The decomposition of dimethyl ether leads to the formation of CH₄, H₂ and CO and the reaction rate is given by Rate = k [CH₃OCH₃]^3/2 The rate of reaction is followed by increase in pressure in a closed vessel, so the rate can also be expressed in terms of the partial pressure of dimethyl ether, i.e., If the pressure is measured in bar andtime in minutes, then what are the units of rate and rate constants?

16.

Thedecomposition of dimethyl ether leads to the formation of CH4,H2and CO and the reaction rate is given byRate= k[CH3OCH3]3/2Therate of reaction is followed by increase in pressure in a closedvessel, so the rate can also be expressed in terms of the partialpressure of dimethyl ether, i.e.,Ifthe pressure is measured in bar andtime inminutes, then what are the units of rate and rate constants?

Answer»

The
decomposition of dimethyl ether leads to the formation of CH₄,
H₂
and CO and the reaction rate is given by

Rate
= k
[CH₃OCH₃]^3/2

The
rate of reaction is followed by increase in pressure in a closed
vessel, so the rate can also be expressed in terms of the partial
pressure of dimethyl ether, i.e.,

If
the pressure is measured in bar andtime in
minutes, then what are the units of rate and rate constants?

Discussion

17.	While arranging the elements on the basis of e affinity should we consider the sign also
Answer» While arranging the elements on the basis of e affinity should we consider the sign also

Discussion

18.	A mixture of two amino acids having pl 9.60 and 5.40 can be separated
Answer» A mixture of two amino acids having pl 9.60 and 5.40 can be separated

Discussion

19.	11. Concentrated aqueous sulphuric acid is 98% H2SO4 by mass and has a density of 1.80 gmL-1, Volume of acid required to make one litre of 0.1 M H2SO solution is (1) 16.65 mL (3) 5.55 mL (2) 22.20 mL (4) 11.10 mL
Answer» 11. Concentrated aqueous sulphuric acid is 98% H2SO4 by mass and has a density of 1.80 gmL-1, Volume of acid required to make one litre of 0.1 M H2SO solution is (1) 16.65 mL (3) 5.55 mL (2) 22.20 mL (4) 11.10 mL

Discussion

20.	No. Of solution for 10sin x=x
Answer» No. Of solution for 10sin x=x

Discussion

21.	Obtainthe maximum kinetic energy of β-particles,and the radiation frequencies of γdecays in the decay scheme shown in Fig. 13.6. You are given thatm(198Au)= 197.968233 um(198Hg)=197.966760 u
Answer» Obtain the maximum kinetic energy of β-particles, and the radiation frequencies of γ decays in the decay scheme shown in Fig. 13.6. You are given that m (¹⁹⁸Au) = 197.968233 u m (¹⁹⁸Hg) =197.966760 u

21.

Obtainthe maximum kinetic energy of β-particles,and the radiation frequencies of γdecays in the decay scheme shown in Fig. 13.6. You are given thatm(198Au)= 197.968233 um(198Hg)=197.966760 u

Answer»

Obtain
the maximum kinetic energy of β-particles,
and the radiation frequencies of γ
decays in the decay scheme shown in Fig. 13.6. You are given that

m
(¹⁹⁸Au)
= 197.968233 u

m
(¹⁹⁸Hg)
=197.966760 u

Discussion

22.	An open U-tube contains mercury. When 13.6 cm of water is poured into one of the arms of the tube, then the mercury rise in the other arm from its initial level is 1. 1cm. 2. 0.5cm 3. 10cm. 4. 5cm
Answer» An open U-tube contains mercury. When 13.6 cm of water is poured into one of the arms of the tube, then the mercury rise in the other arm from its initial level is 1. 1cm. 2. 0.5cm 3. 10cm. 4. 5cm

22.

An open U-tube contains mercury. When 13.6 cm of water is poured into one of the arms of the tube, then the mercury rise in the other arm from its initial level is 1. 1cm. 2. 0.5cm 3. 10cm. 4. 5cm

Answer»

An open U-tube contains mercury. When 13.6 cm of water is poured into one of the arms of the tube, then the mercury rise in the other arm from its initial level is

1. 1cm.

2. 0.5cm

3. 10cm.

4. 5cm

Discussion

23.	Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating
Answer» Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating

Discussion

24.	Explain two neutralisation reactions related to a daily life situation.
Answer» Explain two neutralisation reactions related to a daily life situation.

Discussion

25.	A water sample of 1 litre contains 81 mg of Ca(HCO3)2 ,111mg of CaCl2 and 9.5mg of MgCl2. Its hardness will be
Answer» A water sample of 1 litre contains 81 mg of Ca( ${H C O}_{3}$ ) $_{2}$ ,111mg of ${C a C l}_{2}$ and 9.5mg of ${M g C l}_{2}$ . Its hardness will be

Discussion

26.	In which of the following central metal containing octahedral complex ,the value of CFSE is same for both strong field or weak field ligand 1.Cr+3 2 . Co3+3. Ni+2 4. Both 1 and 2
Answer» In which of the following central metal containing octahedral complex ,the value of CFSE is same for both strong field or weak field ligand 1.Cr+3 2 . Co3+ 3. Ni+2 4. Both 1 and 2

Discussion

27.	38. The number of structural isomers possible from the molecular formula C3H9N is 1) 2 2)3 3)4 4)5
Answer» 38. The number of structural isomers possible from the molecular formula C3H9N is 1) 2 2)3 3)4 4)5

Discussion

28.	A d-block element has total spin value of -3 or +3 ,then the magnetic moment of the element is :?
Answer» A d-block element has total spin value of -3 or +3 ,then the magnetic moment of the element is :?

Discussion

29.	According to valence bond theory, a bond between two atoms is formed when
Answer» According to valence bond theory, a bond between two atoms is formed when

Discussion

30.	7. For a weak base MOH molar conductance of a 0.001M solution is 16.4ohm-1cm2 what will be it's ~^° m? (Kb=1.6×10-6)
Answer» 7. For a weak base MOH molar conductance of a 0.001M solution is 16.4ohm-1cm2 what will be it's ~^° m? (Kb=1.6×10-6)

Discussion

31.	16. The complex ion having minimum magnitude of(CFSE) in octahedral field is(1) \lbrack CoCl6\rbrack3-(3) \lbrack Co(H20)6\rbrack+3(2) Co(CN6)3-(4) \lbrack Co(NH3)6)3
Answer» 16. The complex ion having minimum magnitude of(CFSE) in octahedral field is(1) \lbrack CoCl6\rbrack3-(3) \lbrack Co(H20)6\rbrack+3(2) Co(CN6)3-(4) \lbrack Co(NH3)6)3

Discussion

32.	11. Watch is the size of electron
Answer» 11. Watch is the size of electron

Discussion

33.	Writebalanced equations for:(i)BF3+ LiH →(ii)B2H6+ H2O→(iii)NaH + B2H6→(iv)H3BO3(v)Al + NaOH →(vi)B2H6+ NH3→
Answer» Write balanced equations for: (i) BF₃ + LiH → (ii) B₂H₆ + H₂O → (iii) NaH + B₂H₆ → (iv) H₃BO₃ (v) Al + NaOH → (vi) B₂H₆ + NH₃ →

33.

Writebalanced equations for:(i)BF3+ LiH →(ii)B2H6+ H2O→(iii)NaH + B2H6→(iv)H3BO3(v)Al + NaOH →(vi)B2H6+ NH3→

Answer»

Write
balanced equations for:

(i)
BF₃
+ LiH →

(ii)
B₂H₆
+ H₂O
→

(iii)
NaH + B₂H₆
→

(iv)
H₃BO₃

(v)
Al + NaOH →

(vi)
B₂H₆
+ NH₃
→

Discussion

34.	Product Z will be:
Answer» Product Z will be:

Discussion

35.	For a 'd' electron, the orbital angular momentum is
Answer» For a ' $d$ ' electron, the orbital angular momentum is

Discussion

36.	Assuming that s-p mixing is not allowed, the bond order and magnetic nature of diatomic molecule B2 is
Answer» Assuming that s-p mixing is not allowed, the bond order and magnetic nature of diatomic molecule B2 is

Discussion

37.	Name a compound of each type and draw the figure.(a) Cyclic compound with single bond.(b) Cyclic compound with triple bond.
Answer» Name a compound of each type and draw the figure. (a) Cyclic compound with single bond. (b) Cyclic compound with triple bond.

Discussion

38.	Question 7(a)What is the mass of:(a) 1 mole of nitrogen atoms?
Answer» Question 7(a) What is the mass of: (a) 1 mole of nitrogen atoms?

Discussion

39.	structure of following compound is 4-Amino-4-chloro-6-formyl-1-methylhex-2-yn-1-oate
Answer» structure of following compound is 4-Amino-4-chloro-6-formyl-1-methylhex-2-yn-1-oate

Discussion

40.	Which of the following will produce chiral molecule(s) after reaction is completed.
Answer» Which of the following will produce chiral molecule(s) after reaction is completed.

Discussion

41.	Nitrous oxide (N2O) can be formed by the decomposition of
Answer» Nitrous oxide $(N_{2} O)$ can be formed by the decomposition of

Discussion

42.	42. Is there is CH 3- exist or not if not and yes why
Answer» 42. Is there is CH 3- exist or not if not and yes why

Discussion

43.	Number of H atoms in 34 kg NH3 gas are:
Answer» Number of H atoms in $34 k g N H_{3}$ gas are:

Discussion

44.	Find the correct final product among the following options?
Answer» Find the correct final product among the following options?

Discussion

45.	explain it separating hydrogen isotope of mass number 2 by physical method
Answer» explain it separating hydrogen isotope of mass number 2 by physical method

Discussion

46.	CH3−C\|CH2−CH3=CH−CH2−CH2−CH3
Answer» $C H_{3} - C \| C H_{2} - C H_{3} = C H - C H_{2} - C H_{2} - C H_{3}$

Discussion

47.	Xenon forms three binary fluorides XeF2, XeF4 and XeF6. All the three fluorides are colourless crystalline solids sublimating at 295K. They are powerful fluorinating agents and they are readily hydrolysed by water. XeO3 is a colorless explosive solid acid, prepared by
Answer» Xenon forms three binary fluorides $X e F_{2}, X e F_{4}$ and $X e F_{6}$ . All the three fluorides are colourless crystalline solids sublimating at 295K. They are powerful fluorinating agents and they are readily hydrolysed by water. $X e O_{3}$ is a colorless explosive solid acid, prepared by

Discussion

48.	Consider following compounds.Number of compounds which are more reactive than 2-Chloropropane for SN1 mechanism are
Answer» Consider following compounds. Number of compounds which are more reactive than $2-Chloropropane$ for $S_{N} 1$ mechanism are

Discussion

49.	For endothermic reaction Ea>delta H (always)Is the same true for exothermic? Or can Ea possibly be greater, less or equal delta H, for exothermic?
Answer» For endothermic reaction Ea>delta H (always) Is the same true for exothermic? Or can Ea possibly be greater, less or equal delta H, for exothermic?

Discussion

50.	At temperature T a compound AB2 (g) dissociates according to the reaction 2AB2 --------< 2AB + B2 with a degree of dissociation x which is small as compared to unity the expression for Kp in terms of x and total pressure p is
Answer» At temperature T a compound AB2 (g) dissociates according to the reaction 2AB2 --------< 2AB + B2 with a degree of dissociation x which is small as compared to unity the expression for Kp in terms of x and total pressure p is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Compound A, C8H10O, is found to react with NaOI (produced by reacting Y with NaOH) and yields a yellow precipitate with characteristic smell. A and Y are respectively:

19.How conservation of mass is explained in law of conservation of energy itself.

Lead pipes are not suitable for drinking water because

A mineral consists of an equimolar mixture of the carbonates of two bivalent metals. One metal is present to the extent of 20% by weight. 3.0 g of the mineral on heating lost 1.1 g of CO2. What is the % by weight of the other metal?

The reaction(s) leading to the formation of 1,3,5-trimethylbenzene is/are:

The empirical formula of a commercial ion exchange resin is C8H7SO3Na(M.M=206). The resin can be used to soften water according to the reaction: Ca2++2C8H7SO3Na→Ca(C8H7SO3)2+2Na+ What would be the maximum uptake of Ca2+ by the resin expressed in mol/g of resin?

Acetoacetic ester is made by the process of:

The heats of neutralisation of CH3COOH, HCOOH, HCN and H2S are -12.8, -13.2, -3.2 and -3.9 kcal per equivalent. Arrange these acids in increasing order of strength.

Ion with highest polarizing power is ______.

Molecular formula of Glauber’s salt is

88. draw lewis structure of socl2. and explain shape and hybridisations of NO and NO2 NO3

For the reaction 2NO(g)+2H2(g)→N2(g)+2H2O(g)The rate expression can be written in the following waysd[N2]dt=k1[NO][H2]d[H2O]dt=k[NO][H2]−d[NO]dt=k′1[NO][H2]−d[H2]dt=k′′1[NO][H2]The relationship betyween k,k1,k′1 and k′′1

The drain cleaner, Drainex contains small bits of Aluminium which react with caustic soda to produce dihydrogen. What volume of dihydrogen at 20 degree C and one bar will be released when 0.15 g of Aluminium reacts ?

the identical flasks X and Y contain 64g of methane and 100g of unknown gas A2 respectively at 2 atm and 300K. the vapour density of the gas A2 will be 1. 50 2. 37.5 3. 25 4. 12.5

A metal forms two oxides. The higher oxidecontains 80% metal. 0.72 g of the lower oxide gave0.8 g of higher oxide when oxidised. Then the atioof the weight of oxygen that combines with the fixed weight of the metal in the two oxides will b

While arranging the elements on the basis of e affinity should we consider the sign also

A mixture of two amino acids having pl 9.60 and 5.40 can be separated

11. Concentrated aqueous sulphuric acid is 98% H2SO4 by mass and has a density of 1.80 gmL-1, Volume of acid required to make one litre of 0.1 M H2SO solution is (1) 16.65 mL (3) 5.55 mL (2) 22.20 mL (4) 11.10 mL

No. Of solution for 10sin x=x

Obtainthe maximum kinetic energy of β-particles,and the radiation frequencies of γdecays in the decay scheme shown in Fig. 13.6. You are given thatm(198Au)= 197.968233 um(198Hg)=197.966760 u

An open U-tube contains mercury. When 13.6 cm of water is poured into one of the arms of the tube, then the mercury rise in the other arm from its initial level is 1. 1cm. 2. 0.5cm 3. 10cm. 4. 5cm

Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating

Explain two neutralisation reactions related to a daily life situation.

A water sample of 1 litre contains 81 mg of Ca(HCO3)2 ,111mg of CaCl2 and 9.5mg of MgCl2. Its hardness will be

In which of the following central metal containing octahedral complex ,the value of CFSE is same for both strong field or weak field ligand 1.Cr+3 2 . Co3+3. Ni+2 4. Both 1 and 2

38. The number of structural isomers possible from the molecular formula C3H9N is 1) 2 2)3 3)4 4)5

A d-block element has total spin value of -3 or +3 ,then the magnetic moment of the element is :?

According to valence bond theory, a bond between two atoms is formed when

7. For a weak base MOH molar conductance of a 0.001M solution is 16.4ohm-1cm2 what will be it's ~^° m? (Kb=1.6×10-6)

16. The complex ion having minimum magnitude of(CFSE) in octahedral field is(1) \lbrack CoCl6\rbrack3-(3) \lbrack Co(H20)6\rbrack+3(2) Co(CN6)3-(4) \lbrack Co(NH3)6)3

11. Watch is the size of electron

Writebalanced equations for:(i)BF3+ LiH →(ii)B2H6+ H2O→(iii)NaH + B2H6→(iv)H3BO3(v)Al + NaOH →(vi)B2H6+ NH3→

Product Z will be:

For a 'd' electron, the orbital angular momentum is

Assuming that s-p mixing is not allowed, the bond order and magnetic nature of diatomic molecule B2 is

Name a compound of each type and draw the figure.(a) Cyclic compound with single bond.(b) Cyclic compound with triple bond.

Question 7(a)What is the mass of:(a) 1 mole of nitrogen atoms?

structure of following compound is 4-Amino-4-chloro-6-formyl-1-methylhex-2-yn-1-oate

Which of the following will produce chiral molecule(s) after reaction is completed.

Nitrous oxide (N2O) can be formed by the decomposition of

42. Is there is CH 3- exist or not if not and yes why

Number of H atoms in 34 kg NH3 gas are:

Find the correct final product among the following options?

explain it separating hydrogen isotope of mass number 2 by physical method

CH3−C|CH2−CH3=CH−CH2−CH2−CH3

Xenon forms three binary fluorides XeF2, XeF4 and XeF6. All the three fluorides are colourless crystalline solids sublimating at 295K. They are powerful fluorinating agents and they are readily hydrolysed by water. XeO3 is a colorless explosive solid acid, prepared by

Consider following compounds.Number of compounds which are more reactive than 2-Chloropropane for SN1 mechanism are

For endothermic reaction Ea>delta H (always)Is the same true for exothermic? Or can Ea possibly be greater, less or equal delta H, for exothermic?

At temperature T a compound AB2 (g) dissociates according to the reaction 2AB2 --------< 2AB + B2 with a degree of dissociation x which is small as compared to unity the expression for Kp in terms of x and total pressure p is