46295 + Interview Questions in Chemistry

1.	The equivalent weight of chlorine molecule in the given equation is 3Cl2+6NaOH→5NaCl+NaClO3+3H2O
Answer» The equivalent weight of chlorine molecule in the given equation is $3 C l_{2} + 6 N a O H \to 5 N a C l + N a C l O_{3} + 3 H_{2} O$

Discussion

2.	when HCl is passed through propene in the presence of benzoyl peroxide it give
Answer» when HCl is passed through propene in the presence of benzoyl peroxide it give

Discussion

3.	The molarity of 5% (w/v) sucrose solution if the density of solution is 2.5 g/ml in mol/L is
Answer» The molarity of 5% (w/v) sucrose solution if the density of solution is 2.5 g/ml in mol/L is

Discussion

4.	67 Conditions for tatomerism in both cyclic and acyclic hydrocarbons??
Answer» 67 Conditions for tatomerism in both cyclic and acyclic hydrocarbons??

Discussion

5.	Why Cu ^+is considered unstable although it has a d^{10^{}}configuration ?
Answer» Why Cu ^+is considered unstable although it has a d^{10^{}}configuration ?

Discussion

6.	Which of the following exhibits the weakest inter-molecular forces?
Answer» Which of the following exhibits the weakest inter-molecular forces?

Discussion

7.	In Reimer-Tiemann reaction the major product obtained is:
Answer» In Reimer-Tiemann reaction the major product obtained is:

Discussion

8.	What is haplodiplontic lifecycle?
Answer» What is haplodiplontic lifecycle?

Discussion

9.	Explain the mechanism of the cleaning action of soaps.
Answer» Explain the mechanism of the cleaning action of soaps.

Discussion

10.	Why H2+is more stable than the H2 while both have the same bond order
Answer» Why H2+is more stable than the H2 while both have the same bond order

Discussion

11.	tricks to learn transition n inner transition elements
Answer» tricks to learn transition n inner transition elements

Discussion

12.	Find final temperature and amount of mixture containing 500 grams of Water at 100°C and 10 grams of Ice at -20°C.
Answer» Find final temperature and amount of mixture containing 500 grams of Water at 100°C and 10 grams of Ice at -20°C.

Discussion

13.	Figure shown below is a PT graph of a monoatomic gas which undergoes a cyclic process. If work done by gas in process BC is x, the heat absorbed in process CA is
Answer» Figure shown below is a $P T$ graph of a monoatomic gas which undergoes a cyclic process. If work done by gas in process $B C$ is $x$ , the heat absorbed in process $C A$ is

Discussion

14.	Find out number of reactions in which carboxylic acid is obtained as a final product.i. Me−O\|\|C−OEtH3O+−−−→ii. Me−O\|\|C−O−O\|\|C−Meii. LAH (excess)−−−−−−−−−−→ii. H2Oiii. R−⊕N≡⊖CH3O+−−−→iv. Me−O\|\|C−HPCC−−−→v. Me−O\|\|C−C\|\|O−MeHIO4−−−→vi. CH3−CH=CH−CH2CH3i. O3−−−−−→ii. H2O2
Answer» Find out number of reactions in which carboxylic acid is obtained as a final product. $i . M e - O \| \| C - O E t H_{3} O^{+} - -- \to$ $i i . M e - O \| \| C - O - O \| \| C - M e i i . L A H (e x c e s s) - --------- \to i i . H_{2} O$ $i i i . R - \oplus N \equiv ⊖ C H_{3} O^{+} - -- \to$ $i v . M e - O \| \| C - H P C C - -- \to$ $v . M e - O \| \| C - C \| \| O - M e H I O_{4} - -- \to$ $v i . C H_{3} - C H = C H - C H_{2} C H_{3} i . O_{3} - ---- \to i i . H_{2} O_{2}$

Discussion

15.	Zinc sulphate contains 22.65% Zn and 43.9% H2O. If the law of constant proportion is true, then the mass of zinc required togive 40 g crystal will be
Answer» Zinc sulphate contains 22.65% Zn and 43.9% H2O. If the law of constant proportion is true, then the mass of zinc required togive 40 g crystal will be

Discussion

16.	Marchantia diagram
Answer» Marchantia diagram

Discussion

17.	Which is most basic oxygen in an ester?
Answer» Which is most basic oxygen in an ester?

17.

Which is most basic oxygen in an ester?

Answer»

Which is most basic oxygen in an ester?

Discussion

18.	10.What is the hybridization of Oxygen molecule in the following-: 1. CH3-O-CH=CH2 2. CH3COCH3 [Propanone]
Answer» 10.What is the hybridization of Oxygen molecule in the following-: 1. CH3-O-CH=CH2 2. CH3COCH3 [Propanone]

Discussion

19.	Why does vapour pressure become equal to atmospheric pressure during boiling?
Answer» Why does vapour pressure become equal to atmospheric pressure during boiling?

Discussion

20.	One kg of air (R=287J/kgK) undergoes an irreversible process between equilibrium state 1(20oC,0.9m3) and equilibrium state 2(20oC,0.6m3). The change in entroy s2−s1 (in J/kgK) is -116.368
Answer» One kg of air $(R = 287 J / k g K)$ undergoes an irreversible process between equilibrium state $1 (20^{o} C, 0.9 m^{3})$ and equilibrium state $2 (20^{o} C, 0.6 m^{3})$ . The change in entroy $s_{2} - s_{1}$ (in J/kgK) is -116.368

Discussion

21.	Which of the following statement/statements regarding the solution (ethanol and cyclohexane) showing positive deviation is/are correct?
Answer» Which of the following statement/statements regarding the solution (ethanol and cyclohexane) showing positive deviation is/are correct?

Discussion

22.	Amongst Ni(CO)4, [Ni(CN)4]2− and NiCl2−4:
Answer» Amongst $N i (C O)_{4}, [N i (C N)_{4}]^{2 -} a n d N i C l_{4}^{2 -} :$

Discussion

23.	The total number of electrons in the carbon atom of methyl free radical
Answer» The total number of electrons in the carbon atom of methyl free radical

Discussion

24.	Which of the following is the correct reactivity sequence?
Answer» Which of the following is the correct reactivity sequence?

Discussion

25.	How many geometrical and optical isomers are posiible for coordination no=6 type [MA3B3] complex compound with structure.
Answer» How many geometrical and optical isomers are posiible for coordination no=6 type [MA3B3] complex compound with structure.

Discussion

26.	How many moles of hydrochloric acid will be required to neutralize exactly 80 gram of sodium hydroxide?
Answer» How many moles of hydrochloric acid will be required to neutralize exactly 80 gram of sodium hydroxide?

Discussion

27.	By how much should the pressure be increased in order to decrease the volume of a gas by 5% at a constant temperature?
Answer» By how much should the pressure be increased in order to decrease the volume of a gas by 5% at a constant temperature?

Discussion

28.	35 Which of the following is not planar in structure? 1) CH2 = CH -- CH = CH2 2) CH2 = CH -- CN 3) CH2 = C = CH2 4) CH2 = C = C = CH2 Also explain the reason clearly.
Answer» 35 Which of the following is not planar in structure? 1) CH2 = CH -- CH = CH2 2) CH2 = CH -- CN 3) CH2 = C = CH2 4) CH2 = C = C = CH2 Also explain the reason clearly.

Discussion

29.	What is tyndall effect?Name any four phenomena observed in daily life which are based on tyndall effect.
Answer» What is tyndall effect?Name any four phenomena observed in daily life which are based on tyndall effect.

Discussion

30.	What is lanthanoid contraction
Answer» What is lanthanoid contraction

Discussion

31.	A drop of a solution (volume = 0.05 mL) contains 6×10−7 moles of H+. If the rate of disappearance of H+ is 6.0×105 mol L−1 s−1, how long will it take for the H+ in the drop to disappear?
Answer» A drop of a solution (volume = 0.05 mL) contains $6 \times 10^{- 7}$ moles of $H^{+}$ . If the rate of disappearance of $H^{+}$ is $6.0 \times 10^{5} {mol L}^{- 1} s^{- 1}$ , how long will it take for the $H^{+}$ in the drop to disappear?

Discussion

32.	In a solid ′AB′ having the NaCl structure, ′A′ atoms occupy the corners of the cubic unit cell. If all the face centred atoms along one of the axis are removed, then the resultant stoichiometry of the solid is:
Answer» In a solid $^{'} A B^{'}$ having the $N a C l$ structure, $^{'} A^{'}$ atoms occupy the corners of the cubic unit cell. If all the face centred atoms along one of the axis are removed, then the resultant stoichiometry of the solid is:

Discussion

33.	A unit cell having lattice point occupied by elements P and Q. Atoms of P occupy the corners as well as face-centres. Atoms of Q occupy the body-centre position. If lattice points of two opposite face-centres were removed then the formula of the unit cell is
Answer» A unit cell having lattice point occupied by elements P and Q. Atoms of P occupy the corners as well as face-centres. Atoms of Q occupy the body-centre position. If lattice points of two opposite face-centres were removed then the formula of the unit cell is

Discussion

34.	Calculate the ratio of the radius of 1st orbit of H atom to that of 4th orbit.
Answer» Calculate the ratio of the radius of 1st orbit of H atom to that of 4th orbit.

Discussion

35.	The energy associated with the second orbit of Li2+ is (Ionisation energy of H atom is 2.18 × 10–18 J/atom)
Answer» The energy associated with the second orbit of Li2+ is (Ionisation energy of H atom is 2.18 × 10–18 J/atom)

Discussion

36.	___________ adhesives such as starch, animal glues and plant resins have been used for centuries, and are still used widely today for packaging and for joining wood.
Answer» ___________ adhesives such as starch, animal glues and plant resins have been used for centuries, and are still used widely today for packaging and for joining wood.

Discussion

37.	How will you separate husk or dirt particles from a given sample of pulses before cooking?
Answer» How will you separate husk or dirt particles from a given sample of pulses before cooking?

Discussion

38.	A certain gas effuses out of two different vessels A and B. A has a circular orifice while B has a square orifice of length equal to the radius of the orifice of vessel A. The ratio of rate of diffusion of the gas from vessel A to that from vessel B is
Answer» A certain gas effuses out of two different vessels $A$ and $B$ . $A$ has a circular orifice while $B$ has a square orifice of length equal to the radius of the orifice of vessel $A$ . The ratio of rate of diffusion of the gas from vessel $A$ to that from vessel $B$ is

Discussion

39.	10 mL of an unknown hydrocarbon CnH2n when exploded with excess of O2. Then the contraction in volume was found 30 mL the value of n is
Answer» 10 mL of an unknown hydrocarbon CnH2n when exploded with excess of O2. Then the contraction in volume was found 30 mL the value of n is

Discussion

40.	Pair involving ion dipole force is? 1) NO3- & I2. 2) I- & I2. 3) NO2 & CO2. 4) NO3-& HI
Answer» Pair involving ion dipole force is? 1) NO3- & I2. 2) I- & I2. 3) NO2 & CO2. 4) NO3-& HI

Discussion

41.	9. consider following statements. 1. Haloarenes are more reactive than haloalkanes towards Sn-reactions. 2.C2H5Cl is more reactive than C6H5-CH2-Cl towards Sn-reaction. 3.solubility of haloalkanes in water is very low. select correct statements- (a) only 3 (b) 1 and 3 (c) 2 and 3 (d) 1 and 2
Answer» 9. consider following statements. 1. Haloarenes are more reactive than haloalkanes towards Sn-reactions. 2.C2H5Cl is more reactive than C6H5-CH2-Cl towards Sn-reaction. 3.solubility of haloalkanes in water is very low. select correct statements- (a) only 3 (b) 1 and 3 (c) 2 and 3 (d) 1 and 2

Discussion

42.	A positron is emitted from 2311Na. The ratio of the atomic mass and atomic number of the resulting nuclide is:
Answer» A positron is emitted from $_{11}^{23} N a$ . The ratio of the atomic mass and atomic number of the resulting nuclide is:

Discussion

43.	Change in entropy (in J/K) for freezing of 10 g of H2O(l) (enthalpy of fusion is 80cal/g) at 0∘ C and 1 atm is:(Given: 1 cal=4.2 J, Round the answer upto one decimal point)
Answer» Change in entropy $(in J/K)$ for freezing of $10 g$ of $H_{2} O (l)$ (enthalpy of fusion is $80 cal/g$ ) at $0^{\circ} C$ and $1 atm$ is: (Given: $1 cal = 4.2 J$ , Round the answer upto one decimal point)

Discussion

44.	Air (ideal gas) enters a perfectly insulated compressor at a temperature of 310K. The pressure ratio of the compressor of is 6. Specifci heat at constant pressure for air is 1005J/kg.K and ratio of specific heats at constant pressure and constant volume is 1.4. Assume that specific heats of air are constant. If the isentropic efficiency of the compressor is 85 percent, the difference in enthalpies of air between the exit and the inlet of the compressor is \(kJ/kg) (round off of nearest integer).245
Answer» Air (ideal gas) enters a perfectly insulated compressor at a temperature of $310 K$ . The pressure ratio of the compressor of is $6$ . Specifci heat at constant pressure for air is $1005 J / k g . K$ and ratio of specific heats at constant pressure and constant volume is $1.4$ . Assume that specific heats of air are constant. If the isentropic efficiency of the compressor is $85$ percent, the difference in enthalpies of air between the exit and the inlet of the compressor is \(kJ/kg) (round off of nearest integer). 245

Discussion

45.	Write structures of compounds A and B in each of the following reactions :
Answer» Write structures of compounds A and B in each of the following reactions :

Discussion

46.	Aldol condensation between the following compounds followed by dehydration gives methyl vinyl ketone:
Answer» Aldol condensation between the following compounds followed by dehydration gives methyl vinyl ketone:

46.

Aldol condensation between the following compounds followed by dehydration gives methyl vinyl ketone:

Answer»

Aldol condensation between the following compounds followed by dehydration gives methyl vinyl ketone:

Discussion

47.	The time required for 100% completion of a zero order reaction is
Answer» The time required for 100% completion of a zero order reaction is

Discussion

48.	On Thermal decomposition of 600 gram of limestone 44.8 litre of CO2 gas is produced at STP the percentage purity of limestone will be
Answer» On Thermal decomposition of 600 gram of limestone 44.8 litre of CO2 gas is produced at STP the percentage purity of limestone will be

Discussion

49.	When a glass capillary tube of radius 0.015 cm isdipped in water, the water rises to a height of15 cm within it. Assuming contact angle betweenwater and glass to be 0^° , the surface tension ofwater is \lbrack p = 1000 kg m3,g = 9.81 ms21waterP(1) 0.11 Nm-1(2) 0.7 Nm-1(3) 0.072 Nm-(4) None of thesehelid
Answer» When a glass capillary tube of radius 0.015 cm isdipped in water, the water rises to a height of15 cm within it. Assuming contact angle betweenwater and glass to be 0^° , the surface tension ofwater is \lbrack p = 1000 kg m3,g = 9.81 ms21waterP(1) 0.11 Nm-1(2) 0.7 Nm-1(3) 0.072 Nm-(4) None of thesehelid

Discussion

50.	For hybridisation, we usually use the formula = no.of B.P +No. of L.P. but why then did we use a different formula while calculating hybd. of halides of group 16 . How to decide which formula to use ?? hybd =1/2(no of Valence e + no.of monovalent bonds)
Answer» For hybridisation, we usually use the formula = no.of B.P +No. of L.P. but why then did we use a different formula while calculating hybd. of halides of group 16 . How to decide which formula to use ?? hybd =1/2(no of Valence e + no.of monovalent bonds)

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The equivalent weight of chlorine molecule in the given equation is 3Cl2+6NaOH→5NaCl+NaClO3+3H2O

when HCl is passed through propene in the presence of benzoyl peroxide it give

The molarity of 5% (w/v) sucrose solution if the density of solution is 2.5 g/ml in mol/L is

67 Conditions for tatomerism in both cyclic and acyclic hydrocarbons??

Why Cu ^+is considered unstable although it has a d^{10^{}}configuration ?

Which of the following exhibits the weakest inter-molecular forces?

In Reimer-Tiemann reaction the major product obtained is:

What is haplodiplontic lifecycle?

Explain the mechanism of the cleaning action of soaps.

Why H2+is more stable than the H2 while both have the same bond order

tricks to learn transition n inner transition elements

Find final temperature and amount of mixture containing 500 grams of Water at 100°C and 10 grams of Ice at -20°C.

Figure shown below is a PT graph of a monoatomic gas which undergoes a cyclic process. If work done by gas in process BC is x, the heat absorbed in process CA is

Zinc sulphate contains 22.65% Zn and 43.9% H2O. If the law of constant proportion is true, then the mass of zinc required togive 40 g crystal will be

Marchantia diagram

Which is most basic oxygen in an ester?

10.What is the hybridization of Oxygen molecule in the following-: 1. CH3-O-CH=CH2 2. CH3COCH3 [Propanone]

Why does vapour pressure become equal to atmospheric pressure during boiling?

One kg of air (R=287J/kgK) undergoes an irreversible process between equilibrium state 1(20oC,0.9m3) and equilibrium state 2(20oC,0.6m3). The change in entroy s2−s1 (in J/kgK) is -116.368

Which of the following statement/statements regarding the solution (ethanol and cyclohexane) showing positive deviation is/are correct?

Amongst Ni(CO)4, [Ni(CN)4]2− and NiCl2−4:

The total number of electrons in the carbon atom of methyl free radical

Which of the following is the correct reactivity sequence?

How many geometrical and optical isomers are posiible for coordination no=6 type [MA3B3] complex compound with structure.

How many moles of hydrochloric acid will be required to neutralize exactly 80 gram of sodium hydroxide?

By how much should the pressure be increased in order to decrease the volume of a gas by 5% at a constant temperature?

35 Which of the following is not planar in structure? 1) CH2 = CH -- CH = CH2 2) CH2 = CH -- CN 3) CH2 = C = CH2 4) CH2 = C = C = CH2 Also explain the reason clearly.

What is tyndall effect?Name any four phenomena observed in daily life which are based on tyndall effect.

What is lanthanoid contraction

A drop of a solution (volume = 0.05 mL) contains 6×10−7 moles of H+. If the rate of disappearance of H+ is 6.0×105 mol L−1 s−1, how long will it take for the H+ in the drop to disappear?

In a solid ′AB′ having the NaCl structure, ′A′ atoms occupy the corners of the cubic unit cell. If all the face centred atoms along one of the axis are removed, then the resultant stoichiometry of the solid is:

A unit cell having lattice point occupied by elements P and Q. Atoms of P occupy the corners as well as face-centres. Atoms of Q occupy the body-centre position. If lattice points of two opposite face-centres were removed then the formula of the unit cell is

Calculate the ratio of the radius of 1st orbit of H atom to that of 4th orbit.

The energy associated with the second orbit of Li2+ is (Ionisation energy of H atom is 2.18 × 10–18 J/atom)

___________ adhesives such as starch, animal glues and plant resins have been used for centuries, and are still used widely today for packaging and for joining wood.

How will you separate husk or dirt particles from a given sample of pulses before cooking?

A certain gas effuses out of two different vessels A and B. A has a circular orifice while B has a square orifice of length equal to the radius of the orifice of vessel A. The ratio of rate of diffusion of the gas from vessel A to that from vessel B is

10 mL of an unknown hydrocarbon CnH2n when exploded with excess of O2. Then the contraction in volume was found 30 mL the value of n is

Pair involving ion dipole force is? 1) NO3- & I2. 2) I- & I2. 3) NO2 & CO2. 4) NO3-& HI

9. consider following statements. 1. Haloarenes are more reactive than haloalkanes towards Sn-reactions. 2.C2H5Cl is more reactive than C6H5-CH2-Cl towards Sn-reaction. 3.solubility of haloalkanes in water is very low. select correct statements- (a) only 3 (b) 1 and 3 (c) 2 and 3 (d) 1 and 2

A positron is emitted from 2311Na. The ratio of the atomic mass and atomic number of the resulting nuclide is:

Change in entropy (in J/K) for freezing of 10 g of H2O(l) (enthalpy of fusion is 80cal/g) at 0∘ C and 1 atm is:(Given: 1 cal=4.2 J, Round the answer upto one decimal point)

Write structures of compounds A and B in each of the following reactions :

Aldol condensation between the following compounds followed by dehydration gives methyl vinyl ketone:

The time required for 100% completion of a zero order reaction is

On Thermal decomposition of 600 gram of limestone 44.8 litre of CO2 gas is produced at STP the percentage purity of limestone will be

For hybridisation, we usually use the formula = no.of B.P +No. of L.P. but why then did we use a different formula while calculating hybd. of halides of group 16 . How to decide which formula to use ?? hybd =1/2(no of Valence e + no.of monovalent bonds)