46295 + Interview Questions in Chemistry

1.	Find the Limiting Reagent A+B2 gives AB2 If 100 atoms of A + 100 atoms of B and If 2.5 mol and A and 5 mol of B Please Explain it ! I felt that tricky
Answer» Find the Limiting Reagent A+B₂ gives AB_{2 If 100 atoms of A + 100 atoms of B and If 2.5 mol and A and 5 mol of B} Please Explain it ! I felt that tricky

Discussion

2.	Which of the following is a cyclic phosphate?
Answer» Which of the following is a cyclic phosphate?

Discussion

3.	The compound ratio of 9:5 and a:100 is ________
Answer» The compound ratio of 9:5 and a:100 is ________

Discussion

4.	For the redox reaction : xCr(OH)3+yIO−3+zOH−→xCrO2−4+yI−+H2O the sum of stoichiometric coefficient x+y+z is equal to:
Answer» For the redox reaction : $x C r (O H)_{3} + y I O_{3}^{-} + z O H^{-} \to x C r O_{4}^{2 -} + y I^{-} + H_{2} O$ the sum of stoichiometric coefficient $x + y + z$ is equal to:

Discussion

5.	In the reaction, The product E is:
Answer» In the reaction, The product E is:

Discussion

6.	Can 1s and 2Px orbital combine to give an hybrid orbital?Give Reason for your answer.
Answer» Can 1s and 2Px orbital combine to give an hybrid orbital?Give Reason for your answer.

Discussion

7.	The screening effect of d-electrons is:
Answer» The screening effect of d-electrons is:

Discussion

8.	O3+[O]=2O2 In this reaction square bracket of O indicates what?
Answer» O3+[O]=2O2 In this reaction square bracket of O indicates what?

Discussion

9.	Which element is most difficult to extract and WHY? Cs Zn Mg Ag.
Answer» Which element is most difficult to extract and WHY? Cs Zn Mg Ag.

Discussion

10.	A diatomic ideal gas initially at 272 K is given 100 cal heat due to which system did 209 J work. Molar heat capacity (Cm) of gas for the process is
Answer» A diatomic ideal gas initially at 272 K is given 100 cal heat due to which system did 209 J work. Molar heat capacity ( $C_{m}$ ) of gas for the process is

Discussion

11.	Electronegativity values for elements are useful in predicting
Answer» Electronegativity values for elements are useful in predicting

Discussion

12.	(a) Write the chemical reaction involved in Etard reaction. (b) Arrange the following in the increasing order of their reactivity towards nucleophilic addition reaction: CH3−CHO, C6H5COCH3, HCHO (c) Why is pKa of Cl−CH2−COOH lower than the that of CH3COOH? (d) Write the product in the following reaction: CH3CH2CH=CH−CH2CN1.(i−Bu)2AIH−−−−−−−−−→2.H2O (e) A and B are two functional isomers of compound C3H6O. On heating with NaOH and I2, isomer A forms yellow precipitate of iodoform whereas isomer B does not form any precipitate. Write the formulae of A and B.
Answer» (a) Write the chemical reaction involved in Etard reaction. (b) Arrange the following in the increasing order of their reactivity towards nucleophilic addition reaction: $C H_{3} - C H O, C_{6} H_{5} C O C H_{3}, H C H O$ (c) Why is $p K_{a}$ of $C l - C H_{2} - C O O H$ lower than the that of $C H_{3} C O O H$ ? (d) Write the product in the following reaction: $C H_{3} C H_{2} C H = C H - C H_{2} C N 1. (i - B u)_{2} A I H - -------- \to 2. H_{2} O$ (e) A and B are two functional isomers of compound $C_{3} H_{6} O$ . On heating with NaOH and $I_{2}$ , isomer A forms yellow precipitate of iodoform whereas isomer B does not form any precipitate. Write the formulae of A and B.

Discussion

13.	Why Li as a solid has high electical and thermal conductivity?
Answer» Why Li as a solid has high electical and thermal conductivity?

Discussion

14.	The value of the energy for the first excited state of hydrogen atom is .
Answer» The value of the energy for the first excited state of hydrogen atom is .

Discussion

15.	In Nessler’s reagent for detection of NH3, the active species is
Answer» In Nessler’s reagent for detection of $N H_{3}$ , the active species is

Discussion

16.	Pauling's electro negativity values for elements are useful in predicting
Answer» Pauling's electro negativity values for elements are useful in predicting

Discussion

17.	Anisole is treated with HI under two different conditions. C+DHI(g)←C6H5OCH3conc.HI−−−−−→A+B The nature of A to D will be
Answer» Anisole is treated with HI under two different conditions. $C + D H I (g) \leftarrow C_{6} H_{5} O C H_{3} c o n c . H I - ---- \to A + B$ The nature of A to D will be

Discussion

18.	Calamine is the ore of
Answer» Calamine is the ore of

Discussion

19.	If Mnormal is the normal molecular mass and α is the degree of ionization of K3[Fe(CN)6], then the abnormal molecular mass of the complex in the solution will be:
Answer» If $M_{n o r m a l}$ is the normal molecular mass and $α$ is the degree of ionization of $K_{3} [F e (C N)_{6}]$ , then the abnormal molecular mass of the complex in the solution will be:

Discussion

20.	Explain why BeH2 molecule has a zero dipole moment although the Be–H bonds are polar.
Answer» Explain why $B e H_{2}$ molecule has a zero dipole moment although the Be–H bonds are polar.

Discussion

21.	Give equation of the following reactions. Oxidation of propan-1-ol with alkaline KMnO4 solution. Bromine in CS2 with phenol Dilute HNO3 with phenol Treating phenol with chloroform in presence of aqueous NaOH
Answer» Give equation of the following reactions. Oxidation of propan-1-ol with alkaline $K M n O_{4}$ solution. Bromine in $C S_{2}$ with phenol Dilute $H N O_{3}$ with phenol Treating phenol with chloroform in presence of aqueous NaOH

21.

Give equation of the following reactions. Oxidation of propan-1-ol with alkaline KMnO4 solution. Bromine in CS2 with phenol Dilute HNO3 with phenol Treating phenol with chloroform in presence of aqueous NaOH

Answer»

Give equation of the following reactions.
Oxidation of propan-1-ol with alkaline $K M n O_{4}$ solution.

Bromine in $C S_{2}$ with phenol

Dilute $H N O_{3}$ with phenol

Treating phenol with chloroform in presence of aqueous NaOH

Discussion

22.	The enantiomer of α−D−(+)− glucose is ?
Answer» The enantiomer of $α - D - (+) -$ glucose is ?

Discussion

23.	An ion with mass number 56 contains 3 units of positive charge and 30.4% more neutrons than electrons. Assign the symbol to this ion.
Answer» An ion with mass number 56 contains 3 units of positive charge and 30.4% more neutrons than electrons. Assign the symbol to this ion.

Discussion

24.	A hypothetical electromagnetic wave is shown below. Find out the frequency of the radiation.
Answer» A hypothetical electromagnetic wave is shown below. Find out the frequency of the radiation.

Discussion

25.	This is Sandmeyer reaction. Benzene diazonium chloride when reacts with hypophosphorus acid produces
Answer» This is Sandmeyer reaction. Benzene diazonium chloride when reacts with hypophosphorus acid produces

25.

This is Sandmeyer reaction. Benzene diazonium chloride when reacts with hypophosphorus acid produces

Answer»

This is Sandmeyer reaction.

Benzene diazonium chloride when reacts with hypophosphorus acid produces

Discussion

26.	Which of the following is the correct order of decreasing oxidizing power of perhalates?
Answer» Which of the following is the correct order of decreasing oxidizing power of perhalates?

Discussion

27.	How many of the following compound(s) does not release a gas that turns wet blue litmus paper red? BaCO3,MgCO3,NH4HCO3,(NH4)2CO3,Mg(NO3)2,MgCl2.6H2O,SrCO3,(NH4)2Cr2O7
Answer» How many of the following compound(s) does not release a gas that turns wet blue litmus paper red? $B a C O_{3}, M g C O_{3}, N H_{4} H C O_{3}, (N H_{4})_{2} C O_{3}, M g (N O_{3})_{2}, M g C l_{2} .6 H_{2} O, S r C O_{3}, (N H_{4})_{2} C r_{2} O_{7}$

Discussion

28.	The steps involved in Na(s) → Na+(aq)+e− are
Answer» The steps involved in $N a (s) \to N a^{+} (a q) + e^{-}$ are

Discussion

29.	Which will have highest melting point?
Answer» Which will have highest melting point?

Discussion

30.	Which one of the following anions is present in the chain structure of silicates?
Answer» Which one of the following anions is present in the chain structure of silicates?

Discussion

31.	An aqueous solution of metal ion M1 reacts separately with reagents Q and R in excess to give tetrahedral and square planar complexes, respectively. An aqueous solution of another metal ion M2 always forms tetrahedral complexes with these reagents. Aqueous solution of M2 on reactionn with reagent S gives white precipitate which dissolves in excess of S. The reactions are summarised in the scheme given below: SCHEME: Reagent S is
Answer» An aqueous solution of metal ion M1 reacts separately with reagents Q and R in excess to give tetrahedral and square planar complexes, respectively. An aqueous solution of another metal ion M2 always forms tetrahedral complexes with these reagents. Aqueous solution of M2 on reactionn with reagent S gives white precipitate which dissolves in excess of S. The reactions are summarised in the scheme given below: SCHEME: Reagent S is

Discussion

32.	CH≡CHNi(CN)2−−−−−→Pressure X. Hence X in the reaction
Answer» $C H \equiv C H N i (C N)_{2} - ---- \to P r e s s u r e X . H e n c e X i n t h e r e a c t i o n$

Discussion

33.	Why is the formula of water H2O?
Answer» Why is the formula of water $H_{2} O$ ?

Discussion

34.	Explain the terms with suitable examples : Alcosol Aerosol Hydrosol
Answer» Explain the terms with suitable examples : Alcosol Aerosol Hydrosol

34.

Explain the terms with suitable examples : Alcosol Aerosol Hydrosol

Answer»

Explain the terms with suitable examples :

Alcosol

Aerosol

Hydrosol

Discussion

35.	Solar energy, tidal energy, bio-mass and wind energy are examples of:
Answer» Solar energy, tidal energy, bio-mass and wind energy are examples of:

Discussion

36.	Give chemical equation to convert P2O5 givesH3PO4
Answer» Give chemical equation to convert P₂O₅givesH₃PO₄

Discussion

37.	P- T diagram is shown below. Then choose the corresponding V-T diagram
Answer» P- T diagram is shown below. Then choose the corresponding V-T diagram

37.

P- T diagram is shown below. Then choose the corresponding V-T diagram

Answer»

P- T diagram is shown below. Then choose the corresponding V-T diagram

Discussion

38.	How to balance a chemical equation ?
Answer» How to balance a chemical equation ?

Discussion

39.	A cubical block of wood 10 cm on a side floats at the interface between oil and water with its lower surface horizontal and 4 cm below the interface. The density of oil is0.6 g cm−3. The mass of block is
Answer» A cubical block of wood 10 cm on a side floats at the interface between oil and water with its lower surface horizontal and 4 cm below the interface. The density of oil is $0.6 g c m^{- 3}$ . The mass of block is

39.

A cubical block of wood 10 cm on a side floats at the interface between oil and water with its lower surface horizontal and 4 cm below the interface. The density of oil is0.6 g cm−3. The mass of block is

Answer»

A cubical block of wood 10 cm on a side floats at the interface between oil and water with its lower surface horizontal and 4 cm below the interface. The density of oil is $0.6 g c m^{- 3}$ . The mass of block is

Discussion

40.	Which of the following compounds will exhibit tautomerism?
Answer» Which of the following compounds will exhibit tautomerism?

Discussion

41.	Fluorine has the highest electronegativity among the ns2 np5 group on the Pauling scale, but the electron affinity of fluorine is less than that of chlorine because-
Answer» Fluorine has the highest electronegativity among the $n s^{2} n p^{5}$ group on the Pauling scale, but the electron affinity of fluorine is less than that of chlorine because-

Discussion

42.	The two compounds sulphato penta-ammine cobalt(III) bromide and sulphato penta-ammine cobalt (III) chloride represent 1)linkage isomerism 2) ionisation isomerism 3)co ordination isomerism 4)no isomerism
Answer» The two compounds sulphato penta-ammine cobalt(III) bromide and sulphato penta-ammine cobalt (III) chloride represent 1)linkage isomerism 2) ionisation isomerism 3)co ordination isomerism 4)no isomerism

42.

The two compounds sulphato penta-ammine cobalt(III) bromide and sulphato penta-ammine cobalt (III) chloride represent 1)linkage isomerism 2) ionisation isomerism 3)co ordination isomerism 4)no isomerism

Answer»

The two compounds sulphato penta-ammine cobalt(III) bromide and sulphato penta-ammine cobalt (III) chloride represent

1)linkage isomerism

2) ionisation isomerism

3)co ordination isomerism

4)no isomerism

Discussion

43.	Is melting point of a compound is directly proportional to its atomic mass? If so then why?
Answer» Is melting point of a compound is directly proportional to its atomic mass? If so then why?

Discussion

44.	Rubber which is prepared from latex of rubber trees is a type of:
Answer» Rubber which is prepared from latex of rubber trees is a type of:

Discussion

45.	Calculate the amount of CaCl2 (molar mass =111gmol−1) which must be added to 500 g of water to lower its freezing point by 2K, assuming CaCl2 is completely dissociated. (Kf for water =1.86Kkg mol−1).
Answer» Calculate the amount of $C a C l_{2}$ (molar mass $= 111 g m o l^{- 1})$ which must be added to 500 g of water to lower its freezing point by 2K, assuming $C a C l_{2}$ is completely dissociated. $(K_{f}$ for water $= 1.86 K k g m o l^{- 1})$ .

Discussion

46.	When ethyl chloride is added to Sodium tert-butoxide, ethyl tert-butyl ether is obtained as the major product (shown below): When the concentration of ethyl chloride is doubled, the reaction rate:
Answer» When ethyl chloride is added to Sodium tert-butoxide, ethyl tert-butyl ether is obtained as the major product (shown below): When the concentration of ethyl chloride is doubled, the reaction rate:

Discussion

47.	Which of the following has highest % enol content in the liquid?
Answer» Which of the following has highest % enol content in the liquid?

Discussion

48.	What are the monomeric repeating units of nylon-6 and nylon-6, 6 ?
Answer» What are the monomeric repeating units of nylon-6 and nylon-6, 6 ?

Discussion

49.	The shape of trimethyl amine is:
Answer» The shape of trimethyl amine is:

Discussion

50.	Monochlorination of toluene in sunlight followed by hydrolysis with aq. NaOH yields (a) o - cresol (b) m - cresol (c) 2, 4 - dihydroxytoluene 9d) benzyl alcohol
Answer» Monochlorination of toluene in sunlight followed by hydrolysis with aq. NaOH yields (a) o - cresol (b) m - cresol (c) 2, 4 - dihydroxytoluene 9d) benzyl alcohol

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Find the Limiting Reagent A+B2 gives AB2 If 100 atoms of A + 100 atoms of B and If 2.5 mol and A and 5 mol of B Please Explain it ! I felt that tricky

Which of the following is a cyclic phosphate?

The compound ratio of 9:5 and a:100 is ________

For the redox reaction : xCr(OH)3+yIO−3+zOH−→xCrO2−4+yI−+H2O the sum of stoichiometric coefficient x+y+z is equal to:

In the reaction, The product E is:

Can 1s and 2Px orbital combine to give an hybrid orbital?Give Reason for your answer.

The screening effect of d-electrons is:

O3+[O]=2O2 In this reaction square bracket of O indicates what? ​​

Which element is most difficult to extract and WHY? Cs Zn Mg Ag.

A diatomic ideal gas initially at 272 K is given 100 cal heat due to which system did 209 J work. Molar heat capacity (Cm) of gas for the process is

Electronegativity values for elements are useful in predicting

Why Li as a solid has high electical and thermal conductivity?

The value of the energy for the first excited state of hydrogen atom is .

In Nessler’s reagent for detection of NH3, the active species is

Pauling's electro negativity values for elements are useful in predicting

Anisole is treated with HI under two different conditions. C+DHI(g)←C6H5OCH3conc.HI−−−−−→A+B The nature of A to D will be

Calamine is the ore of

If Mnormal is the normal molecular mass and α is the degree of ionization of K3[Fe(CN)6], then the abnormal molecular mass of the complex in the solution will be:

Explain why BeH2 molecule has a zero dipole moment although the Be–H bonds are polar.

Give equation of the following reactions. Oxidation of propan-1-ol with alkaline KMnO4 solution. Bromine in CS2 with phenol Dilute HNO3 with phenol Treating phenol with chloroform in presence of aqueous NaOH

The enantiomer of α−D−(+)− glucose is ?

An ion with mass number 56 contains 3 units of positive charge and 30.4% more neutrons than electrons. Assign the symbol to this ion.

A hypothetical electromagnetic wave is shown below. Find out the frequency of the radiation.

This is Sandmeyer reaction. Benzene diazonium chloride when reacts with hypophosphorus acid produces

Which of the following is the correct order of decreasing oxidizing power of perhalates?

How many of the following compound(s) does not release a gas that turns wet blue litmus paper red? BaCO3,MgCO3,NH4HCO3,(NH4)2CO3,Mg(NO3)2,MgCl2.6H2O,SrCO3,(NH4)2Cr2O7

The steps involved in Na(s) → Na+(aq)+e− are

Which will have highest melting point?

Which one of the following anions is present in the chain structure of silicates?

CH≡CHNi(CN)2−−−−−→Pressure X. Hence X in the reaction

Why is the formula of water H2O?

Explain the terms with suitable examples : Alcosol Aerosol Hydrosol

Solar energy, tidal energy, bio-mass and wind energy are examples of:

Give chemical equation to convert P2O5 givesH3PO4

P- T diagram is shown below. Then choose the corresponding V-T diagram

How to balance a chemical equation ?

A cubical block of wood 10 cm on a side floats at the interface between oil and water with its lower surface horizontal and 4 cm below the interface. The density of oil is0.6 g cm−3. The mass of block is

Which of the following compounds will exhibit tautomerism?

Fluorine has the highest electronegativity among the ns2 np5 group on the Pauling scale, but the electron affinity of fluorine is less than that of chlorine because-

The two compounds sulphato penta-ammine cobalt(III) bromide and sulphato penta-ammine cobalt (III) chloride represent 1)linkage isomerism 2) ionisation isomerism 3)co ordination isomerism 4)no isomerism

Is melting point of a compound is directly proportional to its atomic mass? If so then why?

Rubber which is prepared from latex of rubber trees is a type of:

Calculate the amount of CaCl2 (molar mass =111gmol−1) which must be added to 500 g of water to lower its freezing point by 2K, assuming CaCl2 is completely dissociated. (Kf for water =1.86Kkg mol−1).

When ethyl chloride is added to Sodium tert-butoxide, ethyl tert-butyl ether is obtained as the major product (shown below): When the concentration of ethyl chloride is doubled, the reaction rate:

Which of the following has highest % enol content in the liquid?

What are the monomeric repeating units of nylon-6 and nylon-6, 6 ?

The shape of trimethyl amine is:

Monochlorination of toluene in sunlight followed by hydrolysis with aq. NaOH yields (a) o - cresol (b) m - cresol (c) 2, 4 - dihydroxytoluene 9d) benzyl alcohol

O3+[O]=2O2 In this reaction square bracket of O indicates what?