46295 + Interview Questions in Chemistry

1.	Concentrated aqueous sulphuric acid is 98%H2so4 (w/v) and has density of 1.80 gm per lit. Molarity of sol.
Answer» Concentrated aqueous sulphuric acid is 98%H2so4 (w/v) and has density of 1.80 gm per lit. Molarity of sol.

Discussion

2.	Who gave the term molecule?
Answer» Who gave the term molecule?

Discussion

3.	Gold number of protective colloids A, B, C and D are 0.50, 0.01, 0.10 and 0.005 respectively. The correct order of their protective power is:
Answer» Gold number of protective colloids $A, B, C and D$ are $0.50, 0.01, 0.10$ and $0.005$ respectively. The correct order of their protective power is:

Discussion

4.	What is node and nodal plane?
Answer» What is node and nodal plane?

Discussion

5.	which one is more stable allyl carbocation or 2 degree carbocation ?
Answer» which one is more stable allyl carbocation or 2 degree carbocation ?

Discussion

6.	Which of the following exists as covalent crystals in the solid state?
Answer» Which of the following exists as covalent crystals in the solid state?

Discussion

7.	18. What concentration of nitrogen should be present in a glass of water at room temperature? Assume a temperature of 25^° C, a total pressure of 1 atm anda temperature of mole fraction of nitrogen in atmosphere an {(K_H for nitrogen =8.42×10^{-7M/mm Hg.
Answer» 18. What concentration of nitrogen should be present in a glass of water at room temperature? Assume a temperature of 25^° C, a total pressure of 1 atm anda temperature of mole fraction of nitrogen in atmosphere an {(K_H for nitrogen =8.42×10^{-7M/mm Hg.

Discussion

8.	In 10 ml of a solution of pH=4, 990 ml of 0.2 M NaCl solution is added. The pH of resulting solution will be:
Answer» In 10 ml of a solution of $p H = 4$ , 990 ml of 0.2 M $N a C l$ solution is added. The $p H$ of resulting solution will be:

Discussion

9.	In which C-C bond in the following compound, the inductive effect is expected to be the least?
Answer» In which C-C bond in the following compound, the inductive effect is expected to be the least?

Discussion

10.	Two short dipoles and are located at (0, 0) and (1 m, 1 m) respectively. The resul†an t electric field due to the two dipoles at the point (0, 1 m) is
Answer» Two short dipoles and are located at (0, 0) and (1 m, 1 m) respectively. The resul†an t electric field due to the two dipoles at the point (0, 1 m) is

Discussion

11.	Which of the following will exhibit geometrical isomerism
Answer» Which of the following will exhibit geometrical isomerism

Discussion

12.	25. describe the formation of HC (ethyne) molecule with respect to covalent bond?
Answer» 25. describe the formation of HC (ethyne) molecule with respect to covalent bond?

Discussion

13.	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

14.	The ionization constantof phenol is 1.0 × 10–10. What is theconcentration ofphenolate ion in 0.05 Msolution of phenol? What will be its degree of ionization if thesolution is also 0.01M in sodium phenolate?
Answer» The ionization constant of phenol is 1.0 × 10^–10. What is the concentration of phenolate ion in 0.05 M solution of phenol? What will be its degree of ionization if the solution is also 0.01M in sodium phenolate?

14.

The ionization constantof phenol is 1.0 × 10–10. What is theconcentration ofphenolate ion in 0.05 Msolution of phenol? What will be its degree of ionization if thesolution is also 0.01M in sodium phenolate?

Answer»

The ionization constant
of phenol is 1.0 × 10^–10. What is the
concentration of

phenolate ion in 0.05 M
solution of phenol? What will be its degree of ionization if the
solution is also 0.01M in sodium phenolate?

Discussion

15.	Calculate the boiling point of a solution containing 0.60 g of benzoic acid in 50 g of CS2(l) assuming 90% association of the acid. The boiling point and Kb for CS2 are 46.2∘C and 2.44 ∘ C kg/mol respectively.
Answer» Calculate the boiling point of a solution containing 0.60 g of benzoic acid in 50 g of $C S_{2} (l)$ assuming 90% association of the acid. The boiling point and $K_{b}$ for $C S_{2}$ are ${46.2}^{\circ} C$ and $2.44^{\circ} C kg/mol$ respectively.

Discussion

16.	The density of a gas A is twice that of gas B at the same temperature. The molecular weight of gas B is twice that of gas A. The ratio of pressures of gases A and B will be:
Answer» The density of a gas $A$ is twice that of gas $B$ at the same temperature. The molecular weight of gas $B$ is twice that of gas $A$ . The ratio of pressures of gases $A$ and $B$ will be:

Discussion

17.	29. The reagent used to distinguish divinyl ether and chloromethyl vinyl ether would be ?
Answer» 29. The reagent used to distinguish divinyl ether and chloromethyl vinyl ether would be ?

Discussion

18.	What are fullerenes ? Name the most common fullerene.
Answer» What are fullerenes ? Name the most common fullerene.

Discussion

19.	71 gram of chlorine combines with a metal giving 111 gram of its chloride. The chloride is isomorphous with MgCl_2.6H_2O.Atomic mass of the metal i
Answer» 71 gram of chlorine combines with a metal giving 111 gram of its chloride. The chloride is isomorphous with MgCl_2.6H_2O.Atomic mass of the metal i

Discussion

20.	For an ideal gas (∂T∂P)s is equal to ( where all symbols carry their usual meaning )
Answer» For an ideal gas ${(\frac{\partial T}{\partial P})}_{s}$ is equal to ( where all symbols carry their usual meaning )

Discussion

21.	10. Molybdenum (molar mass = 96 gmol-')crystallizes as bec crystal, If density of crystal is10.3 g/cm, then radius of Mo atom is(NA = 6 * 10) (Take 131,06 = 3.14](1) 111 pm(2) 314 pm(3) 135.96 pm (4) 271.92 pm
Answer» 10. Molybdenum (molar mass = 96 gmol-') crystallizes as bec crystal, If density of crystal is 10.3 g/cm, then radius of Mo atom is (NA = 6 * 10) (Take 131,06 = 3.14] (1) 111 pm (2) 314 pm (3) 135.96 pm (4) 271.92 pm

Discussion

22.	Identify the type of the following reaction of carbon compounds.a. CH3 -CH2 -CH2-OH → CH3 -CH2 -COOHb. CH3 -CH2 -CH3 → 3CO2 + 4H2Oc. CH3 -CH = CH -CH3 + Br2 → CH3 -CHBr - CHBr -CH3d. CH3 -CH3 + Cl2 → CH3 -CH2 -Cl + HCle. CH3 -CH2 -CH2 -CH2 -OH → CH3 -CH2 -CH=CH2 + H2Of. CH3 -CH2 -COOH + NaOH → CH3 -CH2 -COO - Na+ + H2Og. CH3 -COOH + CH3 -OH → CH3 -COO- CH3 + H2O
Answer» Identify the type of the following reaction of carbon compounds. a. CH₃ -CH₂ -CH₂-OH → CH₃ -CH₂ -COOH b. CH₃ -CH₂ -CH₃ → 3CO₂ + 4H₂O c. CH₃ -CH = CH -CH₃ + Br₂ → CH₃ -CHBr - CHBr -CH₃ d. CH₃ -CH₃ + Cl₂→ CH₃ -CH₂ -Cl + HCl e. CH₃-CH₂ -CH₂ -CH₂ -OH → CH₃ -CH₂ -CH=CH₂ + H₂O f. CH₃-CH₂ -COOH + NaOH → CH₃ -CH₂ -COO - Na⁺ + H₂O g. CH₃ -COOH + CH₃ -OH → CH₃ -COO- CH₃ + H₂O

Discussion

23.	no of atoms in fcc
Answer» no of atoms in fcc

Discussion

24.	if the dis†an ce between Na^+ and Cl^- in sodium chloride is x pm the length of the edge of unit cell 1)2x 2) 4x 3)x/2 4)x/4
Answer» if the dis†an ce between Na^+ and Cl^- in sodium chloride is x pm the length of the edge of unit cell 1)2x 2) 4x 3)x/2 4)x/4

Discussion

25.	Heat of formation of CH4 is:If given:C(s)+O2(g)→CO2(g) △H=−394 kJH2(g)+12O2(g)→H2O(l) △H=−284 kJCH4(g)+2O2(g)→CO2(g)+2H2O(l) △H=−892 kJ
Answer» Heat of formation of $C H_{4}$ is: If given: $C (s) + O_{2} (g) \to C O_{2} (g) △ H = - 394 k J$ $H_{2} (g) + \frac{1}{2} O_{2} (g) \to H_{2} O (l) △ H = - 284 k J$ $C H_{4} (g) + 2 O_{2} (g) \to C O_{2} (g) + 2 H_{2} O (l) △ H = - 892 k J$

25.

Heat of formation of CH4 is:If given:C(s)+O2(g)→CO2(g) △H=−394 kJH2(g)+12O2(g)→H2O(l) △H=−284 kJCH4(g)+2O2(g)→CO2(g)+2H2O(l) △H=−892 kJ

Answer»

Heat of formation of $C H_{4}$ is:

If given:

$C (s) + O_{2} (g) \to C O_{2} (g) △ H = - 394 k J$

$H_{2} (g) + \frac{1}{2} O_{2} (g) \to H_{2} O (l) △ H = - 284 k J$

$C H_{4} (g) + 2 O_{2} (g) \to C O_{2} (g) + 2 H_{2} O (l) △ H = - 892 k J$

Discussion

26.	Which one of the following reagents does not break the O−H bond when reacted with alcohol?
Answer» Which one of the following reagents does not break the $O - H$ bond when reacted with alcohol?

Discussion

27.	Retrouvez la couleur et donnez le féminin.1. rubn2. omrnar3. rgsi4. anjue5. lanbc
Answer» Retrouvez la couleur et donnez le féminin. 1. rubn 2. omrnar 3. rgsi 4. anjue 5. lanbc

Discussion

28.	How many bridges of CO are present in [Mn2(CO)10] ___
Answer» How many bridges of CO are present in $[M n_{2} (C O)_{10}]$ ___

Discussion

29.	Which of the following is the correct order of decreasing field strength of ligands according to spectrochemical series?
Answer» Which of the following is the correct order of decreasing field strength of ligands according to spectrochemical series?

Discussion

30.	Define thefollowing as related to proteins(i) Peptide linkage (ii) Primary structure (iii) Denaturation.
Answer» Define the following as related to proteins (i) Peptide linkage (ii) Primary structure (iii) Denaturation.

30.

Define thefollowing as related to proteins(i) Peptide linkage (ii) Primary structure (iii) Denaturation.

Answer»

Define the
following as related to proteins

(i)
Peptide linkage (ii)
Primary structure (iii)
Denaturation.

Discussion

31.	Which of the following relation is correct with respect to Ist and 2nd Ionization energy of Sodium and Magnesium?
Answer» Which of the following relation is correct with respect to $I^{s t}$ and $2^{n d}$ Ionization energy of Sodium and Magnesium?

Discussion

32.	The correct IUPAC name of the given compound is I−C\|F=C\|Cl−C≡C−OCH3
Answer» The correct IUPAC name of the given compound is $I - C \| F = C \| C l - C \equiv C - O C H_{3}$

Discussion

33.	74. In VSEPR, are lone electron pairs always placed in axial postion?
Answer» 74. In VSEPR, are lone electron pairs always placed in axial postion?

Discussion

34.	Why do other elements of group 15 except nitrogen can exhibit covalency of six , not five ??
Answer» Why do other elements of group 15 except nitrogen can exhibit covalency of six , not five ??

Discussion

35.	One mole of an ideal gas at 25∘C expands in volume from 1.0 L to 4.0 L at constant temperature. What work (in J) is done if the gas expands against vacuum ?
Answer» One mole of an ideal gas at $25^{\circ} C$ expands in volume from 1.0 L to 4.0 L at constant temperature. What work (in J) is done if the gas expands against vacuum ?

Discussion

36.	(a) What change occurs when AgCI is doped with CdCl2 ? (b) What type of semiconductor produced when silicon is doped with boron ?
Answer» (a) What change occurs when AgCI is doped with $C d C l_{2}$ ? (b) What type of semiconductor produced when silicon is doped with boron ?

Discussion

37.	An organic compound 'X' gives brisk effervescence with NaHCO3 and also reduces Tollen's reagent. 'X' is
Answer» An organic compound 'X' gives brisk effervescence with NaHCO₃ and also reduces Tollen's reagent. 'X' is

Discussion

38.	what is dimeriation and trimerisation?
Answer» what is dimeriation and trimerisation?

Discussion

39.	Which of the following gases is used for welding
Answer» Which of the following gases is used for welding

Discussion

40.	0.1 M weak acid HA (pH=3) is titrated with0.05 M NaOH solution. Calculate the pH (approx.)when 25% of acid has been neutralised. (log 30.48) (1) 4.52 (2) 4 () 5.41 (4) 3.52
Answer» 0.1 M weak acid HA (pH=3) is titrated with0.05 M NaOH solution. Calculate the pH (approx.)when 25% of acid has been neutralised. (log 30.48) (1) 4.52 (2) 4 () 5.41 (4) 3.52

Discussion

41.	In what way is the electronic configuration of the transition elements different from that of the non-transition elements?
Answer» In what way is the electronic configuration of the transition elements different from that of the non-transition elements?

41.

In what way is the electronic configuration of the transition elements different from that of the non-transition elements?

Answer»

In what
way is the electronic configuration of the transition elements
different

from
that of the non-transition elements?

Discussion

42.	Which of the following will show paramagnetism?
Answer» Which of the following will show paramagnetism?

Discussion

43.	What will bevthe solubility of A(OH)3 in its aqueus solution if its solubility product is 2.7 x 10 -3
Answer» What will bevthe solubility of A(OH)3 in its aqueus solution if its solubility product is 2.7 x 10 -3

Discussion

44.	Which of the following compounds are related as chain isomers ?
Answer» Which of the following compounds are related as chain isomers ?

Discussion

45.	Which class of drugs is used in sleeping pills?
Answer» Which class of drugs is used in sleeping pills?

Discussion

46.	20% of surface sites are occupied by N2 molecules. The density of surface site is 6.023×1014 cm−2 and total surface area is 1000 cm2. The catalyst is heated to 300 K while N2 is completely desorbed into a pressure of 0.001 atm and volume of 2.46 cm3. Find the number of active sites occupied by each N2 molecule.
Answer» $20 %$ of surface sites are occupied by $N_{2}$ molecules. The density of surface site is $6.023 \times 10^{14} c m^{- 2}$ and total surface area is $1000 c m^{2}$ . The catalyst is heated to $300 K$ while $N_{2}$ is completely desorbed into a pressure of $0.001 a t m$ and volume of $2.46 c m^{3}$ . Find the number of active sites occupied by each $N_{2}$ molecule.

Discussion

47.	for h atoms degenerate orbitals option are 1s and 2p, 3s and 3d, 5s and 3d, 2p and 3p
Answer» for h atoms degenerate orbitals option are 1s and 2p, 3s and 3d, 5s and 3d, 2p and 3p

Discussion

48.	Calamine, malachite, magnetite and cryolite, respectively are:
Answer» Calamine, malachite, magnetite and cryolite, respectively are:

Discussion

49.	3. If the ionisation potential and electron gain enthalpy are respectively 275 and 86 kcal/mol. Then what is the electro negativity of the element in mullikan scale? A) 2.8 B) 1.0 C) 4.0 D) 2.6
Answer» 3. If the ionisation potential and electron gain enthalpy are respectively 275 and 86 kcal/mol. Then what is the electro negativity of the element in mullikan scale? A) 2.8 B) 1.0 C) 4.0 D) 2.6

Discussion

50.	Here 'Z' is
Answer» Here 'Z' is

50.

Here 'Z' is

Answer»

Here 'Z' is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Concentrated aqueous sulphuric acid is 98%H2so4 (w/v) and has density of 1.80 gm per lit. Molarity of sol.

Who gave the term molecule?

Gold number of protective colloids A, B, C and D are 0.50, 0.01, 0.10 and 0.005 respectively. The correct order of their protective power is:

What is node and nodal plane?

which one is more stable allyl carbocation or 2 degree carbocation ?

Which of the following exists as covalent crystals in the solid state?

18. What concentration of nitrogen should be present in a glass of water at room temperature? Assume a temperature of 25^° C, a total pressure of 1 atm anda temperature of mole fraction of nitrogen in atmosphere an {(K_H for nitrogen =8.42×10^{-7M/mm Hg.

In 10 ml of a solution of pH=4, 990 ml of 0.2 M NaCl solution is added. The pH of resulting solution will be:

In which C-C bond in the following compound, the inductive effect is expected to be the least?

Two short dipoles and are located at (0, 0) and (1 m, 1 m) respectively. The resul†an t electric field due to the two dipoles at the point (0, 1 m) is

Which of the following will exhibit geometrical isomerism

25. describe the formation of HC (ethyne) molecule with respect to covalent bond?

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

The ionization constantof phenol is 1.0 × 10–10. What is theconcentration ofphenolate ion in 0.05 Msolution of phenol? What will be its degree of ionization if thesolution is also 0.01M in sodium phenolate?

Calculate the boiling point of a solution containing 0.60 g of benzoic acid in 50 g of CS2(l) assuming 90% association of the acid. The boiling point and Kb for CS2 are 46.2∘C and 2.44 ∘ C kg/mol respectively.

The density of a gas A is twice that of gas B at the same temperature. The molecular weight of gas B is twice that of gas A. The ratio of pressures of gases A and B will be:

29. The reagent used to distinguish divinyl ether and chloromethyl vinyl ether would be ?

What are fullerenes ? Name the most common fullerene.

71 gram of chlorine combines with a metal giving 111 gram of its chloride. The chloride is isomorphous with MgCl_2.6H_2O.Atomic mass of the metal i

For an ideal gas (∂T∂P)s is equal to ( where all symbols carry their usual meaning )

10. Molybdenum (molar mass = 96 gmol-')crystallizes as bec crystal, If density of crystal is10.3 g/cm, then radius of Mo atom is(NA = 6 * 10) (Take 131,06 = 3.14](1) 111 pm(2) 314 pm(3) 135.96 pm (4) 271.92 pm

no of atoms in fcc

if the dis†an ce between Na^+ and Cl^- in sodium chloride is x pm the length of the edge of unit cell 1)2x 2) 4x 3)x/2 4)x/4

Heat of formation of CH4 is:If given:C(s)+O2(g)→CO2(g) △H=−394 kJH2(g)+12O2(g)→H2O(l) △H=−284 kJCH4(g)+2O2(g)→CO2(g)+2H2O(l) △H=−892 kJ

Which one of the following reagents does not break the O−H bond when reacted with alcohol?

Retrouvez la couleur et donnez le féminin.1. rubn2. omrnar3. rgsi4. anjue5. lanbc

How many bridges of CO are present in [Mn2(CO)10] ___

Which of the following is the correct order of decreasing field strength of ligands according to spectrochemical series?

Define thefollowing as related to proteins(i) Peptide linkage (ii) Primary structure (iii) Denaturation.

Which of the following relation is correct with respect to Ist and 2nd Ionization energy of Sodium and Magnesium?

The correct IUPAC name of the given compound is I−C|F=C|Cl−C≡C−OCH3

74. In VSEPR, are lone electron pairs always placed in axial postion?

Why do other elements of group 15 except nitrogen can exhibit covalency of six , not five ??

One mole of an ideal gas at 25∘C expands in volume from 1.0 L to 4.0 L at constant temperature. What work (in J) is done if the gas expands against vacuum ?

(a) What change occurs when AgCI is doped with CdCl2 ? (b) What type of semiconductor produced when silicon is doped with boron ?

An organic compound 'X' gives brisk effervescence with NaHCO3 and also reduces Tollen's reagent. 'X' is

what is dimeriation and trimerisation?

Which of the following gases is used for welding

0.1 M weak acid HA (pH=3) is titrated with0.05 M NaOH solution. Calculate the pH (approx.)when 25% of acid has been neutralised. (log 30.48) (1) 4.52 (2) 4 () 5.41 (4) 3.52

In what way is the electronic configuration of the transition elements different from that of the non-transition elements?

Which of the following will show paramagnetism?

What will bevthe solubility of A(OH)3 in its aqueus solution if its solubility product is 2.7 x 10 -3

Which of the following compounds are related as chain isomers ?

Which class of drugs is used in sleeping pills?

for h atoms degenerate orbitals option are 1s and 2p, 3s and 3d, 5s and 3d, 2p and 3p

Calamine, malachite, magnetite and cryolite, respectively are:

3. If the ionisation potential and electron gain enthalpy are respectively 275 and 86 kcal/mol. Then what is the electro negativity of the element in mullikan scale? A) 2.8 B) 1.0 C) 4.0 D) 2.6

Here 'Z' is