46295 + Interview Questions in Chemistry

1.	Which of the following can function as an oxidizing as well as a reducing agent ?
Answer» Which of the following can function as an oxidizing as well as a reducing agent ?

Discussion

2.	Which of the following has a zero dipole moment?
Answer» Which of the following has a zero dipole moment?

Discussion

3.	Relative lowering of vapour pressure of a solution containing a non volatile solute is equal to mole fraction of the solute. The statement is based on
Answer» Relative lowering of vapour pressure of a solution containing a non volatile solute is equal to mole fraction of the solute. The statement is based on

Discussion

4.	SO2 is a:
Answer» SO₂ is a:

Discussion

5.	The simplest way to check whether a system is a colloid is by using:
Answer» The simplest way to check whether a system is a colloid is by using:

Discussion

6.	An unknown compound 'A' has a molecular formula C4H6. When 'A' is treated with excess of Br2 a new substance with molecular formula C4H6Br2 formed. 'A' forms a white precipitate with Tollen's reagent. Then 'A' may be
Answer» An unknown compound 'A' has a molecular formula $C_{4} H_{6}$ . When 'A' is treated with excess of $B r_{2}$ a new substance with molecular formula $C_{4} H_{6} B r_{2}$ formed. 'A' forms a white precipitate with Tollen's reagent. Then 'A' may be

Discussion

7.	The addition of HBr to an alkene in the presence of peroxide is
Answer» The addition of HBr to an alkene in the presence of peroxide is

Discussion

8.	Which enzyme converts glucose and fructose both into ethanol [MP PMT 1989, 90, 96; CPMT 1983, 84, 86, 94;KCET 1989; MNR 1978; MP PET 1994, 99]
Answer» Which enzyme converts glucose and fructose both into ethanol [MP PMT 1989, 90, 96; CPMT 1983, 84, 86, 94;KCET 1989; MNR 1978; MP PET 1994, 99]

8.

Which enzyme converts glucose and fructose both into ethanol [MP PMT 1989, 90, 96; CPMT 1983, 84, 86, 94;KCET 1989; MNR 1978; MP PET 1994, 99]

Answer»

Which enzyme converts glucose and fructose both into ethanol

[MP PMT 1989, 90, 96; CPMT 1983, 84, 86, 94;KCET 1989; MNR 1978; MP PET 1994, 99]

Discussion

9.	Which of the following is used to treat lead poisoning?
Answer» Which of the following is used to treat lead poisoning?

Discussion

10.	A 3p orbital has:
Answer» A 3p orbital has:

Discussion

11.	Among the following the aromatic compound is :
Answer» Among the following the aromatic compound is :

Discussion

12.	The correct order of hybridisation of the central atom in the following species NH3, [PtCl4]2−, PCl5 and BCl3
Answer» The correct order of hybridisation of the central atom in the following species $N H_{3}$ , ${[P t C l_{4}]}^{2 -}$ , $P C l_{5}$ and $B C l_{3}$

Discussion

13.	The efficiency of a cell is 60%. Its cell reaction is: A(s)+B2+(aq)→A2+(aq)+B(s);ΔH=−240 kJ The standard electrode potential of cell is
Answer» The efficiency of a cell is $60 %$ . Its cell reaction is: $A (s) + B^{2 +} (a q) \to A^{2 +} (a q) + B (s); Δ H = - 240 k J$ The standard electrode potential of cell is

Discussion

14.	Salicyclic acid is treated with bromine under two different conditions. Predict the nature of [X] and [Y] in the above reactions
Answer» Salicyclic acid is treated with bromine under two different conditions. Predict the nature of [X] and [Y] in the above reactions

Discussion

15.	For a reversible adiabatic ideal gas expansion dPP is equal to:
Answer» For a reversible adiabatic ideal gas expansion $\frac{d P}{P}$ is equal to:

Discussion

16.	Which of the following is Friedel-Crafts reaction?
Answer» Which of the following is Friedel-Crafts reaction?

Discussion

17.	Which of the following halides undergoes SN1 reaction at the fastest rate?
Answer» Which of the following halides undergoes $S_{N} 1$ reaction at the fastest rate?

Discussion

18.	(a) For the complex [Fe(CN)6]4−, write the hybridisation, magnetic character and spin type of the complex. (At. number: Fe=26) (b) Draw one of the geometrical isomers of the complex [Co(en)2Cl2]+ which is optically active.
Answer» (a) For the complex $[F e (C N)_{6}]^{4 -}$ , write the hybridisation, magnetic character and spin type of the complex. (At. number: Fe=26) (b) Draw one of the geometrical isomers of the complex $[C o (e n)_{2} C l_{2}]^{+}$ which is optically active.

Discussion

19.	The defect when an ion leaves its lattice point and occupies an interstitial position in the crystal lattice is called ------------------ __
Answer» The defect when an ion leaves its lattice point and occupies an interstitial position in the crystal lattice is called ------------------ __

Discussion

20.	Friedel-Crafts alkylation is expected to proceed through a carbocation intermediate. What would be the alkylation product when benzene reacts with cyclopropyl chloride in the presence of AlCl3?
Answer» Friedel-Crafts alkylation is expected to proceed through a carbocation intermediate. What would be the alkylation product when benzene reacts with cyclopropyl chloride in the presence of $A l C l_{3}$ ?

Discussion

21.	The solubility product of AgCl at 25∘C is 1×10−10. A solution of Ag+ at a concentration of 4×10−3 M just fails to yield a precipitate of AgCl with a concentration of 1×10−3 M of Cl− when the concentration of NH3 in the solution is 2×10−2 M. Calculate the equilibrium constant for [Ag(NH3)2]+⇌Ag++2NH3
Answer» The solubility product of $A g C l$ at $25^{\circ} C$ is $1 \times 10^{- 10}$ . A solution of $A g^{+}$ at a concentration of $4 \times 10^{- 3} M$ just fails to yield a precipitate of $A g C l$ with a concentration of $1 \times 10^{- 3} M$ of $C l^{-}$ when the concentration of $N H_{3}$ in the solution is $2 \times 10^{- 2} M$ . Calculate the equilibrium constant for $[A g (N H_{3})_{2}]^{+} ⇌ A g^{+} + 2 N H_{3}$

Discussion

22.	The reaction N2O4 (g) ⇌2NO2 (g) is carried out at 298 K and 20 bar. Five moles of each of N2O4and NO2, are taken initially. Given: ΔfG∘ (N2O4) = 100 kJ mol−1 and ΔfG∘ (NO2) = 50 kJ mol−1. The reaction proceeds at an initial pressure of 20 bar. Determine the direction in which the reaction proceeds to achieve equilibrium. Also determine the amounts of N2O4 and NO2 when the reaction attains equilibrium.
Answer» The reaction N $_{2}$ O $_{4}$ (g) $⇌$ 2NO $_{2}$ (g) is carried out at 298 K and 20 bar. Five moles of each of N $_{2}$ O $_{4}$ and NO $_{2}$ , are taken initially. Given: $Δ$ $_{f}$ G $^{\circ}$ (N $_{2}$ O $_{4}$ ) = 100 kJ mol $^{- 1}$ and $Δ$ $_{f}$ G $^{\circ}$ (NO $_{2}$ ) = 50 kJ mol $^{- 1}$ . The reaction proceeds at an initial pressure of 20 bar. Determine the direction in which the reaction proceeds to achieve equilibrium. Also determine the amounts of N $_{2}$ O $_{4}$ and NO $_{2}$ when the reaction attains equilibrium.

Discussion

23.	Distilled water at 80∘C has hydronium ion (H3O+) concentration equal to 1×10−6mol/L. The value of Kw at this temperature would be:
Answer» Distilled water at $80^{\circ} C$ has hydronium ion $(H_{3} O^{+})$ concentration equal to $1 \times 10^{- 6} m o l / L$ . The value of $K_{w}$ at this temperature would be:

Discussion

24.	A bottle of sodawater is grasped by the neck and swung briskly in a vertical circle. Near which portion of the bottle do the bubbles collect
Answer» A bottle of sodawater is grasped by the neck and swung briskly in a vertical circle. Near which portion of the bottle do the bubbles collect

Discussion

25.	In the Fischer-Tropsch synthesis of petrol..... and ..... are used as the raw materials
Answer» In the Fischer-Tropsch synthesis of petrol..... and ..... are used as the raw materials

25.

In the Fischer-Tropsch synthesis of petrol..... and ..... are used as the raw materials

Answer»

In the Fischer-Tropsch synthesis of petrol..... and ..... are used as the raw materials

Discussion

26.	In which among the following species dx2−y2 orbital is involved in hybridization:-
Answer» In which among the following species $d_{x^{2} - y^{2}}$ orbital is involved in hybridization:-

Discussion

27.	C6H5CH2CH3 as it is not having chiral carbon atom
Answer» C₆H₅CH₂CH_{3 as it is not having chiral carbon atom}

27.

C6H5CH2CH3 as it is not having chiral carbon atom

Answer»

C₆H₅CH₂CH_{3 as it is not having chiral carbon atom}

Discussion

28.	Which of the following pairs have identical shapes?
Answer» Which of the following pairs have identical shapes?

Discussion

29.	A series of minerals consists of a crystal in which Fe2+ and Mg2+ ions may substitute for each other causing a substitutional impurity defect without changing the volume of the unit cell. In the mineral, the oxide ions exist as fcc with Si2+ occupying 14th of the octahedral voids and divalent ions occupying 14th of the tetrahedral voids. The density of forsterite (Magnesium silicate) is 3.21 g/cc and that of fayalite (Ferrous silicate) is 4.34 g/cc. If the density of mineral is 3.88 g/cc, then which of the following statements is/are CORRECT.
Answer» A series of minerals consists of a crystal in which $F e^{2 +}$ and $M g^{2 +}$ ions may substitute for each other causing a substitutional impurity defect without changing the volume of the unit cell. In the mineral, the oxide ions exist as $f c c$ with $S i^{2 +}$ occupying $\frac{1}{4} t h$ of the octahedral voids and divalent ions occupying $\frac{1}{4} t h$ of the tetrahedral voids. The density of forsterite (Magnesium silicate) is 3.21 $g / c c$ and that of fayalite (Ferrous silicate) is 4.34 $g / c c$ . If the density of mineral is 3.88 g/cc, then which of the following statements is/are CORRECT.

Discussion

30.	Common salt obtained from sea-water contains 96% NaCl by mass. The approximate number of molecules of NaCl present in 10.0 g of the common salt is: (At.wt.Na=23 g)
Answer» Common salt obtained from sea-water contains $96 % N a C l$ by mass. The approximate number of molecules of $N a C l$ present in $10.0 g$ of the common salt is: $(A t . w t . N a = 23 g)$

Discussion

31.	Which of the following is least thermally stable? (correct answer +1, wrong answer -0.25)
Answer» Which of the following is least thermally stable? (correct answer +1, wrong answer -0.25)

Discussion

32.	We cannot find out standard electrode potential of half cell. Why?
Answer» We cannot find out standard electrode potential of half cell. Why?

Discussion

33.	In the reaction CS2(l) + 3O2(g) → CO2(g) + 2SO2(g) ΔH = −265 kcal The enthalpies of formation of CO2 and SO2 are both negative and are in the ratio 4 : 3. The enthalpy of formation of CS2 is +26 kcal/mol. Calculate the enthalpy of formation of SO2.
Answer» In the reaction $C S_{2} (l) + 3 O_{2} (g) \to C O_{2} (g) + 2 S O_{2} (g) Δ H = - 265 k c a l$ The enthalpies of formation of $C O_{2}$ and $S O_{2}$ are both negative and are in the ratio 4 : 3. The enthalpy of formation of $C S_{2}$ is $+ 26 k c a l / m o l$ . Calculate the enthalpy of formation of $S O_{2}$ .

33.

In the reaction CS2(l) + 3O2(g) → CO2(g) + 2SO2(g) ΔH = −265 kcal The enthalpies of formation of CO2 and SO2 are both negative and are in the ratio 4 : 3. The enthalpy of formation of CS2 is +26 kcal/mol. Calculate the enthalpy of formation of SO2.

Answer»

In the reaction

$C S_{2} (l) + 3 O_{2} (g) \to C O_{2} (g) + 2 S O_{2} (g) Δ H = - 265 k c a l$

The enthalpies of formation of $C O_{2}$ and $S O_{2}$ are both negative and are in the ratio 4 : 3. The enthalpy of formation of $C S_{2}$ is $+ 26 k c a l / m o l$ . Calculate the enthalpy of formation of $S O_{2}$ .

Discussion

34.	A sample has two isotopes A and B having masses 50 g and 30 g respectively. A is radioactive and B is stable. A decays to A′ by emitting α particles. The half life of A is 2 hrs. Mass numbers of A and A′ are 150 and 146 respectively. In 4 hour, if the number of α particles emitted is NAn where NA= Avogadro’s number, then n=
Answer» A sample has two isotopes $A$ and $B$ having masses $50 g$ and $30 g$ respectively. $A$ is radioactive and $B$ is stable. A decays to $A^{'}$ by emitting $α$ particles. The half life of $A$ is $2 hrs$ . Mass numbers of $A$ and $A^{'}$ are $150$ and $146$ respectively. In $4$ hour, if the number of $α$ particles emitted is $\frac{N_{A}}{n}$ where $N_{A} =$ Avogadro’s number, then $n =$

Discussion

35.	The correct statement in the following is[MP PET 1997]
Answer» The correct statement in the following is [MP PET 1997]

35.

The correct statement in the following is[MP PET 1997]

Answer»

The correct statement in the following is

[MP PET 1997]

Discussion

36.	Which of the following graphs does not represent s-orbital?
Answer» Which of the following graphs does not represent s-orbital?

Discussion

37.	If atomic mass equals no. of protons plus no. of neutrons who can chlorine's atomic mass be 35.5?
Answer» If atomic mass equals no. of protons plus no. of neutrons who can chlorine's atomic mass be 35.5?

Discussion

38.	An element with density 10gcm−3 forms a cubic unit cell with edge length of 3× 10−8 cm. What is the nature of the cubic unit cell if the atomic mass of the element is 81 g mol−1?
Answer» An element with density $10 g c m^{- 3}$ forms a cubic unit cell with edge length of $3 \times 10^{- 8}$ cm. What is the nature of the cubic unit cell if the atomic mass of the element is 81 g $m o l^{- 1}$ ?

Discussion

39.	The approximate value of √0.24 up to 2 decimal places, is
Answer» The approximate value of $\sqrt{0.24}$ up to 2 decimal places, is

Discussion

40.	2,3-Dimethylbut-2-ene(i) O3/CCl4−−−−−−−→(ii) Zn/H2OP Product 'P' in the reaction given will be:
Answer» $2,3-Dimethylbut-2-ene (i) O_{3} / C C l_{4} - ------ \to (i i) Z n / H_{2} O P$ Product 'P' in the reaction given will be:

Discussion

41.	Consider the following reaction sequence and find the structure of the final product.
Answer» Consider the following reaction sequence and find the structure of the final product.

Discussion

42.	Which of the following statement is not true about H2O2?
Answer» Which of the following statement is not true about $H_{2} O_{2}$ ?

Discussion

43.	Which of the following aqueous solutions, containing 10 gm of solute in each case, has highest boiling point?
Answer» Which of the following aqueous solutions, containing 10 gm of solute in each case, has highest boiling point?

Discussion

44.	Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduces which one of the following functional group?
Answer» Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduces which one of the following functional group?

Discussion

45.	“Chile Saltpeter” is
Answer» “Chile Saltpeter” is

Discussion

46.	Which of the following equation is linear
Answer» Which of the following equation is linear

46.

Which of the following equation is linear

Answer»

Which of the following equation is linear

Discussion

47.	What are electrophiles and nucleophiles? Explain with examples.
Answer» What are electrophiles and nucleophiles? Explain with examples.

Discussion

48.	What is the ratio of rates of effusion of one mole of O2 and one mole of H2, if both are kept at identical pressure and temprature?
Answer» What is the ratio of rates of effusion of one mole of $O_{2}$ and one mole of $H_{2}$ , if both are kept at identical pressure and temprature?

Discussion

49.	Write the reactions of F2 and Cl2 with water?
Answer» Write the reactions of $F_{2}$ and $C l_{2}$ with water?

Discussion

50.	Three charged particles a proton, He++ and Li+++ having same kinetic energy enter a region of uniform magnetic field B0 perpendicular to it. If Rp,RH and RL represent radius of their circular path in field of proton,He++ and Li+++ respectively, then correct relationship between them is
Answer» Three charged particles a proton, $H e^{+ +}$ and $L i^{+ + +}$ having same kinetic energy enter a region of uniform magnetic field $B_{0}$ perpendicular to it. If $R_{p}, R_{H}$ and $R_{L}$ represent radius of their circular path in field of proton, $H e^{+ +}$ and $L i^{+ + +}$ respectively, then correct relationship between them is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following can function as an oxidizing as well as a reducing agent ?

Which of the following has a zero dipole moment?

Relative lowering of vapour pressure of a solution containing a non volatile solute is equal to mole fraction of the solute. The statement is based on

SO2 is a:

The simplest way to check whether a system is a colloid is by using:

An unknown compound 'A' has a molecular formula C4H6. When 'A' is treated with excess of Br2 a new substance with molecular formula C4H6Br2 formed. 'A' forms a white precipitate with Tollen's reagent. Then 'A' may be

The addition of HBr to an alkene in the presence of peroxide is

Which enzyme converts glucose and fructose both into ethanol [MP PMT 1989, 90, 96; CPMT 1983, 84, 86, 94;KCET 1989; MNR 1978; MP PET 1994, 99]

Which of the following is used to treat lead poisoning?

A 3p orbital has:

Among the following the aromatic compound is :

The correct order of hybridisation of the central atom in the following species NH3, [PtCl4]2−, PCl5 and BCl3

The efficiency of a cell is 60%. Its cell reaction is: A(s)+B2+(aq)→A2+(aq)+B(s);ΔH=−240 kJ The standard electrode potential of cell is

Salicyclic acid is treated with bromine under two different conditions. Predict the nature of [X] and [Y] in the above reactions

For a reversible adiabatic ideal gas expansion dPP is equal to:

Which of the following is Friedel-Crafts reaction?

Which of the following halides undergoes SN1 reaction at the fastest rate?

(a) For the complex [Fe(CN)6]4−, write the hybridisation, magnetic character and spin type of the complex. (At. number: Fe=26) (b) Draw one of the geometrical isomers of the complex [Co(en)2Cl2]+ which is optically active.

The defect when an ion leaves its lattice point and occupies an interstitial position in the crystal lattice is called ------------------ __

Friedel-Crafts alkylation is expected to proceed through a carbocation intermediate. What would be the alkylation product when benzene reacts with cyclopropyl chloride in the presence of AlCl3?

Distilled water at 80∘C has hydronium ion (H3O+) concentration equal to 1×10−6mol/L. The value of Kw at this temperature would be:

A bottle of sodawater is grasped by the neck and swung briskly in a vertical circle. Near which portion of the bottle do the bubbles collect

In the Fischer-Tropsch synthesis of petrol..... and ..... are used as the raw materials

In which among the following species dx2−y2 orbital is involved in hybridization:-

C6H5CH2CH3 as it is not having chiral carbon atom

Which of the following pairs have identical shapes?

Common salt obtained from sea-water contains 96% NaCl by mass. The approximate number of molecules of NaCl present in 10.0 g of the common salt is: (At.wt.Na=23 g)

Which of the following is least thermally stable? (correct answer +1, wrong answer -0.25)

We cannot find out standard electrode potential of half cell. Why?

In the reaction CS2(l) + 3O2(g) → CO2(g) + 2SO2(g) ΔH = −265 kcal The enthalpies of formation of CO2 and SO2 are both negative and are in the ratio 4 : 3. The enthalpy of formation of CS2 is +26 kcal/mol. Calculate the enthalpy of formation of SO2.

The correct statement in the following is[MP PET 1997]

Which of the following graphs does not represent s-orbital?

If atomic mass equals no. of protons plus no. of neutrons who can chlorine's atomic mass be 35.5?

An element with density 10gcm−3 forms a cubic unit cell with edge length of 3× 10−8 cm. What is the nature of the cubic unit cell if the atomic mass of the element is 81 g mol−1?

The approximate value of √0.24 up to 2 decimal places, is

2,3-Dimethylbut-2-ene(i) O3/CCl4−−−−−−−→(ii) Zn/H2OP Product 'P' in the reaction given will be:

Consider the following reaction sequence and find the structure of the final product.

Which of the following statement is not true about H2O2?

Which of the following aqueous solutions, containing 10 gm of solute in each case, has highest boiling point?

Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduces which one of the following functional group?

“Chile Saltpeter” is

Which of the following equation is linear

What are electrophiles and nucleophiles? Explain with examples.

What is the ratio of rates of effusion of one mole of O2 and one mole of H2, if both are kept at identical pressure and temprature?

Write the reactions of F2 and Cl2 with water?

Three charged particles a proton, He++ and Li+++ having same kinetic energy enter a region of uniform magnetic field B0 perpendicular to it. If Rp,RH and RL represent radius of their circular path in field of proton,He++ and Li+++ respectively, then correct relationship between them is