46295 + Interview Questions in Chemistry

1.	The conversion of phenyl methyl ketone to ethylbenzene in one step is brought about by which reagent?
Answer» The conversion of phenyl methyl ketone to ethylbenzene in one step is brought about by which reagent?

Discussion

2.	What are electron deficient compounds? Are BCl3 and SiCl4 electron deficient species?
Answer» What are electron deficient compounds? Are BCl3 and SiCl4 electron deficient species?

Discussion

3.	Correct statement/s among the following areA. Formaldehyde in presence of ConcNaOH gives methanolB. Mesityl oxide has functional group of 'CHO'C. Acetone hydrazone on treatment with KOH / CH2OH - CH2OH gives propaneD. Acetone has more boiling point than that of acetaldehyde
Answer» Correct statement/s among the following are A. Formaldehyde in presence of ConcNaOH gives methanol B. Mesityl oxide has functional group of 'CHO' C. Acetone hydrazone on treatment with KOH / CH₂OH - CH₂OH gives propane D. Acetone has more boiling point than that of acetaldehyde

3.

Correct statement/s among the following areA. Formaldehyde in presence of ConcNaOH gives methanolB. Mesityl oxide has functional group of 'CHO'C. Acetone hydrazone on treatment with KOH / CH2OH - CH2OH gives propaneD. Acetone has more boiling point than that of acetaldehyde

Answer»

Correct statement/s among the following are

A. Formaldehyde in presence of ConcNaOH gives methanol
B. Mesityl oxide has functional group of 'CHO'
C. Acetone hydrazone on treatment with KOH / CH₂OH - CH₂OH gives propane

D. Acetone has more boiling point than that of acetaldehyde

Discussion

4.	KI is added to the aqueous solution of CuSO 4. What will happen?give chemical equations.
Answer» KI is added to the aqueous solution of CuSO₄. What will happen?give chemical equations.

Discussion

5.	Column1Column2(A)Antacid(p)Equanil(B)Antibiotic(q)BHT(C)Tranquillizer(r)Brompheniramine(D)Antioxidant(s)Aminoglycosides
Answer» $\begin{matrix} C o l u m n 1 & C o l u m n 2 (A) A n t a c i d & (p) E q u a n i l (B) A n t i b i o t i c & (q) B H T (C) T r a n q u i l l i z e r & (r) B r o m p h e n i r a m i n e (D) A n t i o x i d a n t & (s) A m i n o g l y c o s i d e s \end{matrix}$

Discussion

6.	What is the product formed between lead dioxide reacts with hydrogen peroxide?
Answer» What is the product formed between lead dioxide reacts with hydrogen peroxide?

Discussion

7.	Which of the following has the shortest C−Cl bond?
Answer» Which of the following has the shortest $C - C l$ bond?

Discussion

8.	Ionic solids, with Schottky defects, contain in their structure[CBSE PMT 1994]
Answer» Ionic solids, with Schottky defects, contain in their structure [CBSE PMT 1994]

8.

Ionic solids, with Schottky defects, contain in their structure[CBSE PMT 1994]

Answer»

Ionic solids, with Schottky defects, contain in their structure

[CBSE PMT 1994]

Discussion

9.	Consider the reaction. A(g)+B(g)⇌C(g)+D(g)which occurs in one step. The specific rate constants are 0.25 and 5000 for the forward and reverse reaction, respectively. The equilibrium constant is
Answer» Consider the reaction. $A_{(g)} + B_{(g)} ⇌ C_{(g)} + D_{(g)}$ which occurs in one step. The specific rate constants are 0.25 and 5000 for the forward and reverse reaction, respectively. The equilibrium constant is

9.

Consider the reaction. A(g)+B(g)⇌C(g)+D(g)which occurs in one step. The specific rate constants are 0.25 and 5000 for the forward and reverse reaction, respectively. The equilibrium constant is

Answer»

Consider the reaction.

$A_{(g)} + B_{(g)} ⇌ C_{(g)} + D_{(g)}$ which occurs in one step. The specific rate constants are 0.25 and 5000 for the forward and reverse reaction, respectively. The equilibrium constant is

Discussion

10.	What is the order of reactivity of the following compounds towards nucleophilic substitution?
Answer» What is the order of reactivity of the following compounds towards nucleophilic substitution?

Discussion

11.	The correct condensed structural formula of a compound that has seven carbon (C) atoms, 14 hydrogen (H) atoms and one oxygen (O) atom is :
Answer» The correct condensed structural formula of a compound that has seven carbon (C) atoms, 14 hydrogen (H) atoms and one oxygen (O) atom is :

Discussion

12.	Calculate [OH−] of 0.01 M solution of ammonium hydroxide solution. The ionization constant (Kb) for NH4OH=1.8×10−5.
Answer» Calculate $[O H^{-}]$ of 0.01 M solution of ammonium hydroxide solution. The ionization constant ( $K_{b}$ ) for $N H_{4} O H = 1.8 \times 10^{- 5}$ .

Discussion

13.	Let, the average molar mass of air is 24.9 g. An open vessel at 27 oC is heated upto t oC until 1/3rd of the air measured at final temperature excapes out. The rms velocity of air molecules at t oC is: (Take R=8.3 JK−1mol−1)
Answer» Let, the average molar mass of air is $24.9 g$ . An open vessel at $27^{o} C$ is heated upto $t^{o} C$ until $1 / 3^{r d}$ of the air measured at final temperature excapes out. The rms velocity of air molecules at $t^{o} C$ is: (Take $R = 8.3 J K^{- 1} m o l^{- 1}$ )

Discussion

14.	Consider following equilibriums and their equilibrium constants of lysine. H3N+−(CH2)4CH(NH+3)COOH pK=2.2⇌ H3N+−(CH2)4CH(NH+3)COO−+H+ H3N+−(CH2)4CH(NH2)COO−+H2O pK=5⇌ H3N+−(CH2)4CH(NH+3)COO−+OH− H2N−(CH2)4CH(NH2)COO−+H2O pK=3.4⇌ H3N+−(CH2)4CH(NH2)COO−+OH−
Answer» Consider following equilibriums and their equilibrium constants of lysine. $H_{3} N^{+} - (C H_{2})_{4} C H (N H_{3}^{+}) C O O H p K = 2.2 ⇌ H_{3} N^{+} - (C H_{2})_{4} C H (N H_{3}^{+}) C O O^{-} + H^{+}$ $H_{3} N^{+} - (C H_{2})_{4} C H (N H_{2}) C O O^{-} + H_{2} O p K = 5 ⇌ H_{3} N^{+} - (C H_{2})_{4} C H (N H_{3}^{+}) C O O^{-} + O H^{-}$ $H_{2} N - (C H_{2})_{4} C H (N H_{2}) C O O^{-} + H_{2} O p K = 3.4 ⇌ H_{3} N^{+} - (C H_{2})_{4} C H (N H_{2}) C O O^{-} + O H^{-}$

Discussion

15.	Which of the following compounds can make hydrates?
Answer» Which of the following compounds can make hydrates?

Discussion

16.	If the radius of the hydrogen atom is 53 pm, the radius of the He+ ion is closest to
Answer» If the radius of the hydrogen atom is 53 pm, the radius of the He $^{+}$ ion is closest to

Discussion

17.	Calculate the amount of Ni needed (in g) in the Mond's process given below Ni+4CO→Ni(CO)4 If CO used in this process is obtained through a process, in which 6 g of carbon is mixed with 44 g CO2.(Ni=59 u)
Answer» Calculate the amount of $N i$ needed (in g) in the Mond's process given below $N i + 4 C O \to N i (C O)_{4}$ If $C O$ used in this process is obtained through a process, in which 6 g of carbon is mixed with 44 g $C O_{2} . (N i = 59 u)$

Discussion

18.	For the given reaction, which of the following compounds is the best nucleophile?
Answer» For the given reaction, which of the following compounds is the best nucleophile?

Discussion

19.	The I.U.P.A.C. name for [Ni(NH3)4][NiCl4] is:
Answer» The I.U.P.A.C. name for $[N i (N H_{3})_{4}] [N i C l_{4}]$ is:

Discussion

20.	What is rearrangement reaction?
Answer» What is rearrangement reaction?

Discussion

21.	which of the following orders is correct?
Answer» which of the following orders is correct?

Discussion

22.	Waht are nucleic acids? Mention their two important functions.
Answer» Waht are nucleic acids? Mention their two important functions.

Discussion

23.	p - dichlorobenzene has higher melting point and lower solubility than those of o - and m-isomers. Discuss. ?
Answer» p - dichlorobenzene has higher melting point and lower solubility than those of o - and m-isomers. Discuss. ?

Discussion

24.	Multiple covalent bonds exists in :
Answer» Multiple covalent bonds exists in :

Discussion

25.	Write the monomers used for getting the following polymers. Polyvinyl chloride Teflon Bakelite
Answer» Write the monomers used for getting the following polymers. Polyvinyl chloride Teflon Bakelite

25.

Write the monomers used for getting the following polymers. Polyvinyl chloride Teflon Bakelite

Answer»

Write the monomers used for getting the following polymers.

Polyvinyl chloride

Teflon

Bakelite

Discussion

26.	Derive an expression for the kinetic energy of a body by the calculus method.
Answer» Derive an expression for the kinetic energy of a body by the calculus method.

Discussion

27.	Match the compounds/ions in Column I with their properties/reactions in Column II ColumnIColumnII1. Benzaldehydep. gives precipitate with 2,4-dinitrophenylhydrazine 2. Propyneq. gives precipitate with AgNO33. CN−r. is a nucleophile4. I−s. is involved in cyanohydrin formation
Answer» Match the compounds/ions in Column I with their properties/reactions in Column II $\begin{matrix} C o l u m n I & C o l u m n I I 1. Benzaldehyde & p. gives precipitate with 2,4-dinitrophenylhydrazine 2. Propyne & q. gives precipitate with A g N O_{3} 3. C N^{-} & r. is a nucleophile 4. I^{-} & s. is involved in cyanohydrin formation \end{matrix}$

27.

Match the compounds/ions in Column I with their properties/reactions in Column II ColumnIColumnII1. Benzaldehydep. gives precipitate with 2,4-dinitrophenylhydrazine 2. Propyneq. gives precipitate with AgNO33. CN−r. is a nucleophile4. I−s. is involved in cyanohydrin formation

Answer»

Match the compounds/ions in Column I with their properties/reactions in Column II

$\begin{matrix} C o l u m n I & C o l u m n I I 1. Benzaldehyde & p. gives precipitate with 2,4-dinitrophenylhydrazine 2. Propyne & q. gives precipitate with A g N O_{3} 3. C N^{-} & r. is a nucleophile 4. I^{-} & s. is involved in cyanohydrin formation \end{matrix}$

Discussion

28.	Packing fraction is minimum in which of the following?
Answer» Packing fraction is minimum in which of the following?

Discussion

29.	A solution is a mixture of 0.05 M KCl and 0.05 M NaI. The concentration of I− in the solution when AgCl just starts to precipitate is equal to: (KspAgCl=10−10M2;KspAgI=4×10−16M2)
Answer» A solution is a mixture of $0.05 M K C l$ and $0.05 M N a I$ . The concentration of $I^{-}$ in the solution when $A g C l$ just starts to precipitate is equal to: $(K_{s p} A g C l = 10^{- 10} M^{2}; K_{s p} A g I = 4 \times 10^{- 16} M^{2})$

Discussion

30.	What is the pH of 107mol L−1 HCl solution at 25∘C?
Answer» What is the pH of $10^{7}$ mol $L^{- 1}$ HCl solution at $25^{\circ}$ C?

Discussion

31.	A magnetic moment of 1.73 BM will be shown by :
Answer» A magnetic moment of $1.73 BM$ will be shown by :

Discussion

32.	How to find oxidation number of Fe in Na4[Fe(CN)6]?
Answer» How to find oxidation number of Fe in Na₄[Fe(CN)6]?

Discussion

33.	Ca + O → A–– Ca + N2 → B––. A & B are
Answer» $C a + O \to A - -$ $C a + N_{2} \to B - -$ . A & B are

33.

Ca + O → A–– Ca + N2 → B––. A & B are

Answer»

$C a + O \to A - -$

$C a + N_{2} \to B - -$ . A & B are

Discussion

34.	The stabilisation of coordination compounds due to chelation is called the chelate effect. Which of the following is the most stable complex species? (a) [Fe(CO)5] (b) [Fe(CN)6]3− (c) [Fe(C2O4)3]3− (d) [Fe(H2O)6]3+
Answer» The stabilisation of coordination compounds due to chelation is called the chelate effect. Which of the following is the most stable complex species? (a) $[F e (C O)_{5}]$ (b) $[F e (C N)_{6}]^{3 -}$ (c) $[F e (C_{2} O_{4})_{3}]^{3 -}$ (d) $[F e (H_{2} O)_{6}]^{3 +}$

Discussion

35.	Which among the alkali metal is 1)Typical element 2)Used in photo electric cell 3)Radioactive 4)Liquid at room temeperature
Answer» Which among the alkali metal is 1)Typical element 2)Used in photo electric cell 3)Radioactive 4)Liquid at room temeperature

35.

Which among the alkali metal is 1)Typical element 2)Used in photo electric cell 3)Radioactive 4)Liquid at room temeperature

Answer»

Which among the alkali metal is

1)Typical element

2)Used in photo electric cell

3)Radioactive

4)Liquid at room temeperature

Discussion

36.	Which of the following reaction can not produce 1∘ amine as major product?
Answer» Which of the following reaction can not produce $1^{\circ}$ amine as major product?

Discussion

37.	0.25 g lyophilic colloid is added to 100 ml gold solution to prevent the coagulation on adding 1 ml 10% NaCl solution. What will be gold number of lyophilic colloid?
Answer» 0.25 g lyophilic colloid is added to 100 ml gold solution to prevent the coagulation on adding 1 ml 10% NaCl solution. What will be gold number of lyophilic colloid?

Discussion

38.	Why ccp structure is also called fcc structure ?
Answer» Why ccp structure is also called fcc structure ?

Discussion

39.	Calculate molarity of a solution of ethanol in water in which the mole fraction of ethanol is 0.040
Answer» Calculate molarity of a solution of ethanol in water in which the mole fraction of ethanol is 0.040

Discussion

40.	Consider the following intramolecular aldol condensation reaction: X is:
Answer» Consider the following intramolecular aldol condensation reaction: $X$ is:

Discussion

41.	C.l + O3 → Cl.O + O2(g) this reaction is the cause for
Answer» $C . l + O_{3} \to C l . O + O_{2} (g)$ this reaction is the cause for

Discussion

42.	Calculate the solubility of sparingly soluble salt PbI2 in water at 25∘C which is 90% dissociated. Ksp(PbI2)=9×10−9 at 25∘C (Take 3√3.08=1.45)
Answer» Calculate the solubility of sparingly soluble salt $P b I_{2}$ in water at $25^{\circ} C$ which is $90$ % dissociated. $K_{s p} (P b I_{2}) = 9 \times 10^{- 9}$ at $25^{\circ} C$ (Take $\sqrt[3]{3.08} = 1.45$ )

Discussion

43.	In aqueous solution, the carboxyl group can lose a proton and amino group can accept a proton, giving rise to a dipolar ion known as:
Answer» In aqueous solution, the carboxyl group can lose a proton and amino group can accept a proton, giving rise to a dipolar ion known as:

Discussion

44.	In the equilibrium, 2NO(g)+O2(g)⇔2NO2(g) + Heat formation of NO2 is favoured by
Answer» In the equilibrium, $2 N O (g) + O 2_{(} g) \Leftrightarrow 2 N O_{2} (g)$ + Heat formation of $N O_{2}$ is favoured by

Discussion

45.	Explain the effect of concentration on molar conductivity of weak and strong electrolytes
Answer» Explain the effect of concentration on molar conductivity of weak and strong electrolytes

Discussion

46.	Anhydrous sample of FeCl3 is prepared by heating
Answer» Anhydrous sample of $F e C l_{3}$ is prepared by heating

Discussion

47.	Dissolved gases can be removed from liquids by heating because:
Answer» Dissolved gases can be removed from liquids by heating because:

Discussion

48.	The second and third period of the modern periodic table contains how many elements?
Answer» The second and third period of the modern periodic table contains how many elements?

Discussion

49.	Consider the following species: N3–,O2–,F–,Na+,Mg2+andAl3+ (a)What is common in them? (b)Arrange them in the order of increasing ionic radii.
Answer» Consider the following species: $N^{3 -}, O^{2 -}, F^{-}, N a^{+}, M g^{2 +} a n d A l^{3 +}$ (a)What is common in them? (b)Arrange them in the order of increasing ionic radii.

Discussion

50.	The boiling point of 0.2 mol kg−1solution of X in water is greater than equimolal solution of Y in water. Which one of the following statements is true in this case?
Answer» The boiling point of 0.2 mol $k g^{- 1}$ solution of X in water is greater than equimolal solution of Y in water. Which one of the following statements is true in this case?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The conversion of phenyl methyl ketone to ethylbenzene in one step is brought about by which reagent?

What are electron deficient compounds? Are BCl3 and SiCl4 electron deficient species?

Correct statement/s among the following areA. Formaldehyde in presence of ConcNaOH gives methanolB. Mesityl oxide has functional group of 'CHO'C. Acetone hydrazone on treatment with KOH / CH2OH - CH2OH gives propaneD. Acetone has more boiling point than that of acetaldehyde

KI is added to the aqueous solution of CuSO 4. What will happen?give chemical equations.

Column1Column2(A)Antacid(p)Equanil(B)Antibiotic(q)BHT(C)Tranquillizer(r)Brompheniramine(D)Antioxidant(s)Aminoglycosides

What is the product formed between lead dioxide reacts with hydrogen peroxide?

Which of the following has the shortest C−Cl bond?

Ionic solids, with Schottky defects, contain in their structure[CBSE PMT 1994]

Consider the reaction. A(g)+B(g)⇌C(g)+D(g)which occurs in one step. The specific rate constants are 0.25 and 5000 for the forward and reverse reaction, respectively. The equilibrium constant is

What is the order of reactivity of the following compounds towards nucleophilic substitution?

The correct condensed structural formula of a compound that has seven carbon (C) atoms, 14 hydrogen (H) atoms and one oxygen (O) atom is :

Calculate [OH−] of 0.01 M solution of ammonium hydroxide solution. The ionization constant (Kb) for NH4OH=1.8×10−5.

Let, the average molar mass of air is 24.9 g. An open vessel at 27 oC is heated upto t oC until 1/3rd of the air measured at final temperature excapes out. The rms velocity of air molecules at t oC is: (Take R=8.3 JK−1mol−1)

Consider following equilibriums and their equilibrium constants of lysine. H3N+−(CH2)4CH(NH+3)COOH pK=2.2⇌ H3N+−(CH2)4CH(NH+3)COO−+H+ H3N+−(CH2)4CH(NH2)COO−+H2O pK=5⇌ H3N+−(CH2)4CH(NH+3)COO−+OH− H2N−(CH2)4CH(NH2)COO−+H2O pK=3.4⇌ H3N+−(CH2)4CH(NH2)COO−+OH−

Which of the following compounds can make hydrates?

If the radius of the hydrogen atom is 53 pm, the radius of the He+ ion is closest to

Calculate the amount of Ni needed (in g) in the Mond's process given below Ni+4CO→Ni(CO)4 If CO used in this process is obtained through a process, in which 6 g of carbon is mixed with 44 g CO2.(Ni=59 u)

For the given reaction, which of the following compounds is the best nucleophile?

The I.U.P.A.C. name for [Ni(NH3)4][NiCl4] is:

What is rearrangement reaction?

which of the following orders is correct?

Waht are nucleic acids? Mention their two important functions.

p - dichlorobenzene has higher melting point and lower solubility than those of o - and m-isomers. Discuss. ?

Multiple covalent bonds exists in :

Write the monomers used for getting the following polymers. Polyvinyl chloride Teflon Bakelite

Derive an expression for the kinetic energy of a body by the calculus method.

Match the compounds/ions in Column I with their properties/reactions in Column II ColumnIColumnII1. Benzaldehydep. gives precipitate with 2,4-dinitrophenylhydrazine 2. Propyneq. gives precipitate with AgNO33. CN−r. is a nucleophile4. I−s. is involved in cyanohydrin formation

Packing fraction is minimum in which of the following?

A solution is a mixture of 0.05 M KCl and 0.05 M NaI. The concentration of I− in the solution when AgCl just starts to precipitate is equal to: (KspAgCl=10−10M2;KspAgI=4×10−16M2)

What is the pH of 107mol L−1 HCl solution at 25∘C?

A magnetic moment of 1.73 BM will be shown by :

How to find oxidation number of Fe in Na4[Fe(CN)6]?

Ca + O → A–– Ca + N2 → B––. A &amp; B are

The stabilisation of coordination compounds due to chelation is called the chelate effect. Which of the following is the most stable complex species? (a) [Fe(CO)5] (b) [Fe(CN)6]3− (c) [Fe(C2O4)3]3− (d) [Fe(H2O)6]3+

Which among the alkali metal is 1)Typical element 2)Used in photo electric cell 3)Radioactive 4)Liquid at room temeperature

Which of the following reaction can not produce 1∘ amine as major product?

0.25 g lyophilic colloid is added to 100 ml gold solution to prevent the coagulation on adding 1 ml 10% NaCl solution. What will be gold number of lyophilic colloid?

Why ccp structure is also called fcc structure ?

Calculate molarity of a solution of ethanol in water in which the mole fraction of ethanol is 0.040

Consider the following intramolecular aldol condensation reaction: X is:

C.l + O3 → Cl.O + O2(g) this reaction is the cause for

Calculate the solubility of sparingly soluble salt PbI2 in water at 25∘C which is 90% dissociated. Ksp(PbI2)=9×10−9 at 25∘C (Take 3√3.08=1.45)

In aqueous solution, the carboxyl group can lose a proton and amino group can accept a proton, giving rise to a dipolar ion known as:

In the equilibrium, 2NO(g)+O2(g)⇔2NO2(g) + Heat formation of NO2 is favoured by

Explain the effect of concentration on molar conductivity of weak and strong electrolytes

Anhydrous sample of FeCl3 is prepared by heating

Dissolved gases can be removed from liquids by heating because:

The second and third period of the modern periodic table contains how many elements?

Consider the following species: N3–,O2–,F–,Na+,Mg2+andAl3+ (a)What is common in them? (b)Arrange them in the order of increasing ionic radii.

The boiling point of 0.2 mol kg−1solution of X in water is greater than equimolal solution of Y in water. Which one of the following statements is true in this case?

Ca + O → A–– Ca + N2 → B––. A & B are