46295 + Interview Questions in Chemistry

1.	how to find atomic weight of an element?
Answer» how to find atomic weight of an element?

Discussion

2.	According to C.E.vanderwaal the interatomic piotential varies with the average interatomic dis†an ce (R) as a)R^{-2} b)R^-
Answer» According to C.E.vanderwaal the interatomic piotential varies with the average interatomic dis†an ce (R) as a)R^{-2} b)R^-

Discussion

3.	The enthalpy of neautralization of a weak monoprotic acid (HA) in 1M solution with a strong monoacidic base is −55.95 kJ/mol. If the unionized acid requires 1.4 kJ/mol heat for its complete ionization and enthalpy of neutralization of the strong monobasic acid with a strong monoacidic base is −57.3 kJ/mol. What is the percentage ionization of the weak acid in molar solution? (Put your answer upto two decimal points)
Answer» The enthalpy of neautralization of a weak monoprotic acid $(H A)$ in $1 M$ solution with a strong monoacidic base is $- 55.95 k J / m o l$ . If the unionized acid requires $1.4 k J / m o l$ heat for its complete ionization and enthalpy of neutralization of the strong monobasic acid with a strong monoacidic base is $- 57.3 k J / m o l$ . What is the percentage ionization of the weak acid in molar solution? (Put your answer upto two decimal points)

Discussion

4.	Pick the incorrect option about ionic bond.
Answer» Pick the incorrect option about ionic bond.

Discussion

5.	Y don't we get tertiary or secondary amines in reduction of nitrile??
Answer» Y don't we get tertiary or secondary amines in reduction of nitrile??

Discussion

6.	Which of the following relations is dimensionally incorrect? (A) 1 a.m.u =931.5MeV. (B). 1 a.m.u = 931.5MeV/c2 (C) 1 a.m.u = 1.67×10-27Kg. (D). None of these
Answer» Which of the following relations is dimensionally incorrect? (A) 1 a.m.u =931.5MeV. (B). 1 a.m.u = 931.5MeV/c² (C) 1 a.m.u = 1.67×10^-27Kg. (D). None of these

Discussion

7.	Explain how Newtown found r3/t2.
Answer» Explain how Newtown found r3/t2.

Discussion

8.	More will be the electron density,more will be the basic nature.Explain why?How the basic nature depends on electron density?
Answer» More will be the electron density,more will be the basic nature.Explain why?How the basic nature depends on electron density?

Discussion

9.	Ethane and benzene illustrate law of multiple proportion. How?
Answer» Ethane and benzene illustrate law of multiple proportion. How?

Discussion

10.	When lead storage battery is charged [MP PET 1993; MP PMT 2000]
Answer» When lead storage battery is charged [MP PET 1993; MP PMT 2000]

10.

When lead storage battery is charged [MP PET 1993; MP PMT 2000]

Answer»

When lead storage battery is charged

[MP PET 1993; MP PMT 2000]

Discussion

11.	In the following reaction, which species acts as an oxidising agent? Fe2++2H++NO−3→Fe3++NO2+H2O
Answer» In the following reaction, which species acts as an oxidising agent? $F e^{2 +} + 2 H^{+} + N O_{3}^{-} \to F e^{3 +} + N O_{2} + H_{2} O$

Discussion

12.	3.No of possible structures of amines C7H9N having one benzene ring is A_5 B_3 c_4 d_6
Answer» 3.No of possible structures of amines C7H9N having one benzene ring is A_5 B_3 c_4 d_6

Discussion

13.	Alcohol and thiol functional groups are present in which of the following compounds?
Answer» Alcohol and thiol functional groups are present in which of the following compounds?

Discussion

14.	3-Phenyl propene on reaction with HBr gives (as a major product):
Answer» $3 -Phenyl propene$ on reaction with $H B r$ gives (as a major product):

Discussion

15.	does oxidation state mean the charge preset on atom when it is oxidised or reduced??
Answer» does oxidation state mean the charge preset on atom when it is oxidised or reduced??

Discussion

16.	The ionization constant of phenol is 1.0 ×10^{-10} what is the concentration phenolate ion in 0.05 M solution of phenol? What will be its degree of ionization of the solution is also 0.01 M in sodium phenolat
Answer» The ionization constant of phenol is 1.0 ×10^{-10} what is the concentration phenolate ion in 0.05 M solution of phenol? What will be its degree of ionization of the solution is also 0.01 M in sodium phenolat

Discussion

17.	which one of the following act only as a base1] h2s 2]hs^- 3] s^2- 4] h2o
Answer» which one of the following act only as a base 1] h2s 2]hs^- 3] s^2- 4] h2o

Discussion

18.	The curve showing the variation of adsorption with pressure at constant temperature is called:
Answer» The curve showing the variation of adsorption with pressure at constant temperature is called:

Discussion

19.	On mixing an alkane with chlorine and irradiating with ultraviolet light, it forms only one monochloro alkane. The alkane is
Answer» On mixing an alkane with chlorine and irradiating with ultraviolet light, it forms only one monochloro alkane. The alkane is

Discussion

20.	The resultant dipole moment of water is 1.85 D, Calculate the bond moment of OH bond (in D), bond angle in water molecule is 104o C. Given: cos 104o = -0.25 (Ignore the dipole moment due to lone pair)
Answer» The resultant dipole moment of water is 1.85 D, Calculate the bond moment of $O H$ bond (in D), bond angle in water molecule is $104^{o}$ C. Given: cos $104^{o}$ = -0.25 (Ignore the dipole moment due to lone pair)

Discussion

21.	ph of a solution obtained by mixing 600 ml n/2 ch3cooh and 200 ml n/2 naoh
Answer» ph of a solution obtained by mixing 600 ml n/2 ch3cooh and 200 ml n/2 naoh

Discussion

22.	Which of the following is strongest Lewis base?
Answer» Which of the following is strongest Lewis base?

Discussion

23.	24. If the difference in atomic size of : Na - Li = x; Rb - K = y; Fr - Cs = z. Then correct order will be :- (1) x=y=z (2) x>y>z (3) x
Answer» 24. If the difference in atomic size of : Na - Li = x; Rb - K = y; Fr - Cs = z. Then correct order will be :- (1) x=y=z (2) x>y>z (3) x

Discussion

24.	Value of heat of fusion of NaCI is
Answer» Value of heat of fusion of NaCI is

Discussion

25.	What is a chemical reaction?
Answer» What is a chemical reaction?

Discussion

26.	30. What is the precipitate formed when 15ml of 16.9% of AgNO3 is mixed with 50ml of 5.8 % NaCl solution? 1) 7g 2)14g 3) 28g 4) 3.5g
Answer» 30. What is the precipitate formed when 15ml of 16.9% of AgNO3 is mixed with 50ml of 5.8 % NaCl solution? 1) 7g 2)14g 3) 28g 4) 3.5g

Discussion

27.	Which of the following is correct for a salt of weak acid and strong base? Here C is the concentration of the salt.
Answer» Which of the following is correct for a salt of weak acid and strong base? Here C is the concentration of the salt.

Discussion

28.	During an adiabatic reversible change, the density becomes 116th of the initial value. Then find P1P2 is : (γ=1.5)
Answer» During an adiabatic reversible change, the density becomes $\frac{1}{16}$ th of the initial value. Then find $\frac{P_{1}}{P_{2}}$ is : $(γ = 1.5)$

Discussion

29.	ntAn aqueous solution have a density of 1.25 g/ml. If molecular weight of solute is 62.5 g/mol then calculate molarity of solution.n
Answer» ntAn aqueous solution have a density of 1.25 g/ml. If molecular weight of solute is 62.5 g/mol then calculate molarity of solution.n

Discussion

30.	The major product formed when methyl iodide reacts with sodium nitrite is
Answer» The major product formed when methyl iodide reacts with sodium nitrite is

Discussion

31.	Two moles of an ideal mono atomic gas undergoes compression from A to B as shown in the figure: If for the process AB, PT2 = constant Then the work done (in kcal) on the system for the process AB is
Answer» Two moles of an ideal mono atomic gas undergoes compression from A to B as shown in the figure: If for the process AB, $P T^{2}$ = constant Then the work done (in kcal) on the system for the process AB is

Discussion

32.	Which one is the most reactive towards an electrophilic reagent?
Answer» Which one is the most reactive towards an electrophilic reagent?

Discussion

33.	3. Aromatic compounds can be halogenated using molecular halogen in the presence of an acid. Benzene when treated with molecular bromine in the presence of ferric chloride gives bromobenzene. Naphthalene undergoes bromination with bromine in acetic acid. The kinetics of this reaction is interesting. The kinetic expression involves a term that is second order in bromine for the reaction in glacial acetic acid, and first order in bromine for the reaction in 50% aqueous acetic acid. Naphthalene: Aluminium chloride is much more active Lewis acid than ferric chloride and the halogenations can be carried out using AlCl3. The bond energies of Al-Cl and Al-Br are 502 kJ mol1 and 430 kJ mol1, respectively. The correct statement(s) is/are (A) The reaction of benzene with bromine in the presence of AlCl3 gives a substantial amount of chlorobenzene. (B) The reaction of naphthalene with bromine in the presence of glacial acetic acid involves reaction of two molecules of bromine with one molecule of naphthalene, and no involvement of acetic acid, in the rate determining step. (C) The reaction of naphthalene with bromine in 50% aqueous acetic acid involves bromine and acetic acid in the rate determining step. (D) When 1-methylnaphthalene is reacted with bromine in the presence of a Lewis acid 4-bromo-1-methylnaphthalene is formed as the major product.
Answer» 3. Aromatic compounds can be halogenated using molecular halogen in the presence of an acid. Benzene when treated with molecular bromine in the presence of ferric chloride gives bromobenzene. Naphthalene undergoes bromination with bromine in acetic acid. The kinetics of this reaction is interesting. The kinetic expression involves a term that is second order in bromine for the reaction in glacial acetic acid, and first order in bromine for the reaction in 50% aqueous acetic acid. Naphthalene: Aluminium chloride is much more active Lewis acid than ferric chloride and the halogenations can be carried out using AlCl3. The bond energies of Al-Cl and Al-Br are 502 kJ mol1 and 430 kJ mol1, respectively. The correct statement(s) is/are (A) The reaction of benzene with bromine in the presence of AlCl3 gives a substantial amount of chlorobenzene. (B) The reaction of naphthalene with bromine in the presence of glacial acetic acid involves reaction of two molecules of bromine with one molecule of naphthalene, and no involvement of acetic acid, in the rate determining step. (C) The reaction of naphthalene with bromine in 50% aqueous acetic acid involves bromine and acetic acid in the rate determining step. (D) When 1-methylnaphthalene is reacted with bromine in the presence of a Lewis acid 4-bromo-1-methylnaphthalene is formed as the major product.

Discussion

34.	22. Why NaH2po2 is not amphiprotic ion
Answer» 22. Why NaH2po2 is not amphiprotic ion

Discussion

35.	Reaction of a carbonyl compound with one of the following reagents involves a nucleophilic addition followed by a dehydration. The reagent is:
Answer» Reaction of a carbonyl compound with one of the following reagents involves a nucleophilic addition followed by a dehydration. The reagent is:

Discussion

36.	what is rayleigh scattering ?
Answer» what is rayleigh scattering ?

Discussion

37.	ch3ch2cl reacts with kcn to form a ch3ch2nc b ch3ch2cn c c h3ch2nh2 d ch3ch2ch2nh2
Answer» ch3ch2cl reacts with kcn to form a ch3ch2nc b ch3ch2cn c c h3ch2nh2 d ch3ch2ch2nh2

Discussion

38.	Down cell costruction in Na extraction
Answer» Down cell costruction in Na extraction

Discussion

39.	2. Two half-reactions of an electrochemical cell are given below :MnO – 4 (aq) + 8H + (aq) + 5e – → Mn 2+ (aq) + 4H 2 O (I) , E° = 1.51 VSn 2+ (aq) → Sn 4+ (aq) + 2e – , E° = + 0.15 V.Construct the redox reaction equation from the two half-reactions and calculatethe cell potential from the standard potentials and predict if the reaction isreactant or product favoured.
Answer» 2. Two half-reactions of an electrochemical cell are given below : MnO – 4 (aq) + 8H + (aq) + 5e – → Mn 2+ (aq) + 4H 2 O (I) , E° = 1.51 V Sn 2+ (aq) → Sn 4+ (aq) + 2e – , E° = + 0.15 V. Construct the redox reaction equation from the two half-reactions and calculate the cell potential from the standard potentials and predict if the reaction is reactant or product favoured.

Discussion

40.	How one equivalent weight equals 1F?
Answer» How one equivalent weight equals 1F?

Discussion

41.	which of the following complexes is sigma as well as pi complexes ?a)Ni(CO)_4b){Fe_2{(CO)_9c)only 2d)both 1 and 2
Answer» which of the following complexes is sigma as well as pi complexes ?a)Ni(CO)_4b){Fe_2{(CO)_9c)only 2d)both 1 and 2

Discussion

42.	The number of atoms in 100 g of a FCC crystal with density d=10 g/cm3 and cell edge length equal to 100 pm, is equal to:
Answer» The number of atoms in $100 g$ of a FCC crystal with density $d = 10 {g/cm}^{3}$ and cell edge length equal to $100 pm$ , is equal to:

Discussion

43.	If the equilibrium consatnt for the reaction H+(aq)+OH−(aq)⇌H2O(l) at a certain temperature is 10−26, then what is the E0 for the reaction, 2H2O(l)+2e−⇌H2(g)+2OH−(aq)(Given: 2.303RTF=0.066)
Answer» If the equilibrium consatnt for the reaction $H^{+} (a q) + O H^{-} (a q) ⇌ H_{2} O (l)$ at a certain temperature is $10^{- 26}$ , then what is the $E^{0}$ for the reaction, $2 H_{2} O (l) + 2 e^{-} ⇌ H_{2} (g) + 2 O H^{-} (a q)$ (Given: $\frac{2.303 R T}{F} = 0.066$ )

Discussion

44.	Whichof the following compounds would undergo aldol condensation, whichthe Cannizzaro reaction and which neither? Write the structures ofthe expected products of aldol condensation and Cannizzaro reaction.(i) Methanal (ii) 2-Methylpentanal(iii) Benzaldehyde (iv) Benzophenone(v) Cyclohexanone (vi) 1-Phenylpropanone(vii) Phenylacetaldehyde (viii) Butan-1-ol(ix) 2,2-Dimethylbutanal
Answer» Which of the following compounds would undergo aldol condensation, which the Cannizzaro reaction and which neither? Write the structures of the expected products of aldol condensation and Cannizzaro reaction. (i) Methanal (ii) 2-Methylpentanal (iii) Benzaldehyde (iv) Benzophenone (v) Cyclohexanone (vi) 1-Phenylpropanone (vii) Phenylacetaldehyde (viii) Butan-1-ol (ix) 2, 2-Dimethylbutanal

44.

Whichof the following compounds would undergo aldol condensation, whichthe Cannizzaro reaction and which neither? Write the structures ofthe expected products of aldol condensation and Cannizzaro reaction.(i) Methanal (ii) 2-Methylpentanal(iii) Benzaldehyde (iv) Benzophenone(v) Cyclohexanone (vi) 1-Phenylpropanone(vii) Phenylacetaldehyde (viii) Butan-1-ol(ix) 2,2-Dimethylbutanal

Answer»

Which
of the following compounds would undergo aldol condensation, which
the Cannizzaro reaction and which neither? Write the structures of
the expected products of aldol condensation and Cannizzaro reaction.

(i) Methanal
(ii) 2-Methylpentanal

(iii) Benzaldehyde (iv) Benzophenone

(v) Cyclohexanone (vi) 1-Phenylpropanone

(vii) Phenylacetaldehyde (viii) Butan-1-ol

(ix) 2,
2-Dimethylbutanal

Discussion

45.	Iron(111)hexacyaniodoferrate(11)How the Formula of this coordination compound is formed?
Answer» Iron(111)hexacyaniodoferrate(11) How the Formula of this coordination compound is formed?

Discussion

46.	Buna-s is a polymer of
Answer» Buna-s is a polymer of

Discussion

47.	Which of the following reactions gives a racemic mixture?
Answer» Which of the following reactions gives a racemic mixture?

Discussion

48.	Find the value of y.zx, if the following molecules undergo dimerization: I. ClO3 II. OF2 III. GaH3 IV. AlCl3 V. ICl3 VI. BeH2 VII. NO2 x: Number of molecules which are hypervalent in dimeric form y: Number of molecules with a complete octet in dimeric form z: Number of molecules which are hypovalent in dimeric form
Answer» Find the value of $\frac{y . z}{x}$ , if the following molecules undergo dimerization: I. $C l O_{3}$ II. $O F_{2}$ III. $G a H_{3}$ IV. $A l C l_{3}$ V. $I C l_{3}$ VI. $B e H_{2}$ VII. $N O_{2}$ $x$ : Number of molecules which are hypervalent in dimeric form $y$ : Number of molecules with a complete octet in dimeric form $z$ : Number of molecules which are hypovalent in dimeric form

Discussion

49.	3. pyridine is less basic than triethyl amine. A)pyridine has aromatic character. B)N in pyridine is sp2 hybridised C)in Pyridine lone pair of N is decolalised
Answer» 3. pyridine is less basic than triethyl amine. A)pyridine has aromatic character. B)N in pyridine is sp2 hybridised C)in Pyridine lone pair of N is decolalised

Discussion

50.	Pls provide me with the various equations of molality,normality,molarity,formality and it's application with definition
Answer» Pls provide me with the various equations of molality,normality,molarity,formality and it's application with definition

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

how to find atomic weight of an element?

According to C.E.vanderwaal the interatomic piotential varies with the average interatomic dis†an ce (R) as a)R^{-2} b)R^-

Pick the incorrect option about ionic bond.

Y don't we get tertiary or secondary amines in reduction of nitrile??

Which of the following relations is dimensionally incorrect? (A) 1 a.m.u =931.5MeV. (B). 1 a.m.u = 931.5MeV/c2 (C) 1 a.m.u = 1.67×10-27Kg. (D). None of these

Explain how Newtown found r3/t2.

More will be the electron density,more will be the basic nature.Explain why?How the basic nature depends on electron density?

Ethane and benzene illustrate law of multiple proportion. How?

When lead storage battery is charged [MP PET 1993; MP PMT 2000]

In the following reaction, which species acts as an oxidising agent? Fe2++2H++NO−3→Fe3++NO2+H2O

3.No of possible structures of amines C7H9N having one benzene ring is A_5 B_3 c_4 d_6

Alcohol and thiol functional groups are present in which of the following compounds?

3-Phenyl propene on reaction with HBr gives (as a major product):

does oxidation state mean the charge preset on atom when it is oxidised or reduced??

The ionization constant of phenol is 1.0 ×10^{-10} what is the concentration phenolate ion in 0.05 M solution of phenol? What will be its degree of ionization of the solution is also 0.01 M in sodium phenolat

which one of the following act only as a base1] h2s 2]hs^- 3] s^2- 4] h2o

The curve showing the variation of adsorption with pressure at constant temperature is called:

On mixing an alkane with chlorine and irradiating with ultraviolet light, it forms only one monochloro alkane. The alkane is

The resultant dipole moment of water is 1.85 D, Calculate the bond moment of OH bond (in D), bond angle in water molecule is 104o C. Given: cos 104o = -0.25 (Ignore the dipole moment due to lone pair)

ph of a solution obtained by mixing 600 ml n/2 ch3cooh and 200 ml n/2 naoh

Which of the following is strongest Lewis base?

24. If the difference in atomic size of : Na - Li = x; Rb - K = y; Fr - Cs = z. Then correct order will be :- (1) x=y=z (2) x>y>z (3) x

Value of heat of fusion of NaCI is

What is a chemical reaction?

30. What is the precipitate formed when 15ml of 16.9% of AgNO3 is mixed with 50ml of 5.8 % NaCl solution? 1) 7g 2)14g 3) 28g 4) 3.5g

Which of the following is correct for a salt of weak acid and strong base? Here C is the concentration of the salt.

During an adiabatic reversible change, the density becomes 116th of the initial value. Then find P1P2 is : (γ=1.5)

ntAn aqueous solution have a density of 1.25 g/ml. If molecular weight of solute is 62.5 g/mol then calculate molarity of solution.n

The major product formed when methyl iodide reacts with sodium nitrite is

Two moles of an ideal mono atomic gas undergoes compression from A to B as shown in the figure: If for the process AB, PT2 = constant Then the work done (in kcal) on the system for the process AB is

Which one is the most reactive towards an electrophilic reagent?

22. Why NaH2po2 is not amphiprotic ion

Reaction of a carbonyl compound with one of the following reagents involves a nucleophilic addition followed by a dehydration. The reagent is:

what is rayleigh scattering ?

ch3ch2cl reacts with kcn to form a ch3ch2nc b ch3ch2cn c c h3ch2nh2 d ch3ch2ch2nh2

Down cell costruction in Na extraction

How one equivalent weight equals 1F?

which of the following complexes is sigma as well as pi complexes ?a)Ni(CO)_4b){Fe_2{(CO)_9c)only 2d)both 1 and 2

The number of atoms in 100 g of a FCC crystal with density d=10 g/cm3 and cell edge length equal to 100 pm, is equal to:

If the equilibrium consatnt for the reaction H+(aq)+OH−(aq)⇌H2O(l) at a certain temperature is 10−26, then what is the E0 for the reaction, 2H2O(l)+2e−⇌H2(g)+2OH−(aq)(Given: 2.303RTF=0.066)

Iron(111)hexacyaniodoferrate(11)How the Formula of this coordination compound is formed?

Buna-s is a polymer of

Which of the following reactions gives a racemic mixture?

3. pyridine is less basic than triethyl amine. A)pyridine has aromatic character. B)N in pyridine is sp2 hybridised C)in Pyridine lone pair of N is decolalised

Pls provide me with the various equations of molality,normality,molarity,formality and it's application with definition