46295 + Interview Questions in Chemistry

1.	The most likely reason for the development of resistance against pesticides in insect-damaged crop is
Answer» The most likely reason for the development of resistance against pesticides in insect-damaged crop is

Discussion

2.	the vapour pressure of pure liquids Aand B are 200 and 350 mm hg respectively , at 300k . mole fraction of liquid A in a mixture having its vapour pressure 305mm of Hg i
Answer» the vapour pressure of pure liquids Aand B are 200 and 350 mm hg respectively , at 300k . mole fraction of liquid A in a mixture having its vapour pressure 305mm of Hg i

Discussion

3.	10. What is the mole fraction of NaOH in 1 molal solution?
Answer» 10. What is the mole fraction of NaOH in 1 molal solution?

Discussion

4.	A common emitter amplifier has a voltage gain of 50 and current gain is 25. The power gain of the amplifier is 125x. The value of x is (integer only)
Answer» A common emitter amplifier has a voltage gain of $50$ and current gain is $25.$ The power gain of the amplifier is $125 x .$ The value of $x$ is (integer only)

Discussion

5.	In the following molecule:The hybridisations of carbon a, b and c respectively are:
Answer» In the following molecule: The hybridisations of carbon a, b and c respectively are:

Discussion

6.	An electric kettle heater has two coils. When one coil is switched ON, the water in the kettle begins to boil after 15 minutes, If the other coil is switched on, the water boils in 30 minutes. Which of the following statement is correct.
Answer» An electric kettle heater has two coils. When one coil is switched ON, the water in the kettle begins to boil after 15 minutes, If the other coil is switched on, the water boils in 30 minutes. Which of the following statement is correct.

Discussion

7.	The ratio of the energy of a photon of 2000 oA wavelength radiation to that of 4000 oA radiation is:
Answer» The ratio of the energy of a photon of $2000 o A$ wavelength radiation to that of $4000 o A$ radiation is:

Discussion

8.	How number of electrons affect the effective nuclear charge and ionic radius?
Answer» How number of electrons affect the effective nuclear charge and ionic radius?

Discussion

9.	Among the given compounds, the increasing order of stability of conjugate base is :
Answer» Among the given compounds, the increasing order of stability of conjugate base is :

Discussion

10.	how much mass of sodium acetate is required to make 250ml of 0.575 molar aqueous solution
Answer» how much mass of sodium acetate is required to make 250ml of 0.575 molar aqueous solution

Discussion

11.	Define Quantisation of energy.
Answer» Define Quantisation of energy.

Discussion

12.	H3C−CH3\|C\|CH3−O−K++CH3−Br→Y+KBr Which of the following is not possible for Y?
Answer» $H_{3} C - C H_{3} \| C \| C H_{3} - O^{-} K^{+} + C H_{3} - B r \to Y + K B r$ Which of the following is not possible for Y?

12.

H3C−CH3|C|CH3−O−K++CH3−Br→Y+KBr Which of the following is not possible for Y?

Answer»

$H_{3} C - C H_{3} | C | C H_{3} - O^{-} K^{+} + C H_{3} - B r \to Y + K B r$

Which of the following is not possible for Y?

Discussion

13.	The difference in the oxidation number of two types of S-atoms in Na2S4O6 is ___.
Answer» The difference in the oxidation number of two types of S-atoms in $N a_{2} S_{4} O_{6}$ is ___.

Discussion

14.	The product of the intramolecular aldol condensation of the given substrate is
Answer» The product of the intramolecular aldol condensation of the given substrate is

Discussion

15.

Refrigerant is working between the temperature limit of 25oC and −5oC At the entry of the compressor, dryness fraction is 0.6. Mass flow rate of refrigerant in the cycle is \(0.167\,kg/s. What is the work required by the compressor? Temp oCLiquid heat (hf)(kJ/kg)Latent enthalpy (kJ/kg)Entropy of liquid (kJ/g−K)2581.25121.60.2513−5−7.53245.8−0.0419

Answer»

Refrigerant is working between the temperature limit of $25^{o} C$ and $- 5^{o} C$ At the entry of the compressor, dryness fraction is $0.6$ . Mass flow rate of refrigerant in the cycle is \(0.167\,kg/s. What is the work required by the compressor?

Temp $^{o} C$	Liquid heat $(h_{f}) (k J / k g)$	Latent enthalpy $(k J / k g)$	Entropy of liquid $(k J / g - K)$
$25$	$81.25$	$121.6$	$0.2513$
$- 5$	$- 7.53$	$245.8$	$- 0.0419$

Discussion

16.	The correct order of basic strength of the following is
Answer» The correct order of basic strength of the following is

16.

The correct order of basic strength of the following is

Answer»

The correct order of basic strength of the following is

Discussion

17.	Acetadehyde reacts with thionyl chloride to give (the main product)
Answer» Acetadehyde reacts with thionyl chloride to give (the main product)

Discussion

18.	What is the hybridization of CH2=CH2
Answer» What is the hybridization of CH2=CH2

Discussion

19.	Heat of hydrogenation of ethene and benzene are x1 and x2. What will be the correct expression for resonance energy of Benzene?
Answer» Heat of hydrogenation of ethene and benzene are $x_{1}$ and $x_{2}$ . What will be the correct expression for resonance energy of Benzene?

Discussion

20.	The amount of Naoh is required to neutralize 1500cm3 of 0.1 N HCl
Answer» The amount of Naoh is required to neutralize 1500cm3 of 0.1 N HCl

Discussion

21.	Ozonolysis of 2-methyl butene-2 yields
Answer» Ozonolysis of 2-methyl butene-2 yields

Discussion

22.	Assertion :- The heat absorbed during the isothermal expansion of an ideal gas against vacuum is zero reason :- The volume occupied by the molecules of an ideal gas is zero. Answer says both the statements are correct but reason doesn't explain the assertion. i get the Assertion part (as ∆U = 0 , so q=P∆V and in vacuum P = 0) but how come the reason is true?
Answer» Assertion :- The heat absorbed during the isothermal expansion of an ideal gas against vacuum is zero reason :- The volume occupied by the molecules of an ideal gas is zero. Answer says both the statements are correct but reason doesn't explain the assertion. i get the Assertion part (as ∆U = 0 , so q=P∆V and in vacuum P = 0) but how come the reason is true?

22.

Assertion :- The heat absorbed during the isothermal expansion of an ideal gas against vacuum is zero reason :- The volume occupied by the molecules of an ideal gas is zero. Answer says both the statements are correct but reason doesn't explain the assertion. i get the Assertion part (as ∆U = 0 , so q=P∆V and in vacuum P = 0) but how come the reason is true?

Answer»

Assertion :- The heat absorbed during the isothermal expansion of an ideal gas against vacuum is zero

reason :- The volume occupied by the molecules of an ideal gas is zero.

Answer says both the statements are correct but reason doesn't explain the assertion.

i get the Assertion part (as ∆U = 0 , so q=P∆V and in vacuum P = 0) but how come the reason is true?

Discussion

23.	The enthalpy of hydrogenation of cyclohexene is −119.5 kJ/ mol. If resonance energy of benzene is −150.4 kJ/mol then what is its enthalpy of hydrogenation?
Answer» The enthalpy of hydrogenation of cyclohexene is $- 119.5 kJ/ mol$ . If resonance energy of benzene is $- 150.4 kJ/mol$ then what is its enthalpy of hydrogenation?

Discussion

24.	The enthalpy of hydrogenation of cyclohexene is –119.5 kJ mol–1. If resonance energy of benzene is –150.4 kJ mol–1, its enthalpy of hydrogenation would be
Answer» The enthalpy of hydrogenation of cyclohexene is –119.5 kJ mol–1. If resonance energy of benzene is –150.4 kJ mol–1, its enthalpy of hydrogenation would be

Discussion

25.	Arrange the following in increasing order of their bond angle and also state the reason: 1) OF2, H2O, Cl2O 2) BeCl2, BCl3, CCl2
Answer» Arrange the following in increasing order of their bond angle and also state the reason: 1) OF2, H2O, Cl2O 2) BeCl2, BCl3, CCl2

Discussion

26.	Define Lewis Dot Structure.
Answer» Define Lewis Dot Structure.

Discussion

27.	Heat of reaction for, CO(g) + 1/2 O2(g)→ CO2(g)at constant V is-67.71 K cal at 17^° C. The heat of reaction at constant P at 17^° C is
Answer» Heat of reaction for, CO(g) + 1/2 O2(g)→ CO2(g)at constant V is-67.71 K cal at 17^° C. The heat of reaction at constant P at 17^° C is

Discussion

28.	What is the noun form of the word? Errant
Answer» What is the noun form of the word? Errant

28.

What is the noun form of the word? Errant

Answer»

What is the noun form of the word?
Errant

Discussion

29.	Explain why the molecular shape of boron trifluoride is trigonal planar.
Answer» Explain why the molecular shape of boron trifluoride is trigonal planar.

Discussion

30.	Consider the reactions(i) (CH3)2CH−CH2BrC2H5OH−−−−−→(CH3)2CH−CH2OC2H5+HBr(ii) (CH3)2CH−CH2BrC2HSO−−−−−−→(CH3)2 CH CH2OC2H5+Br− The mechanism of reactions (i) & (ii) are respectively
Answer» Consider the reactions (i) $(C H_{3})_{2} C H - C H_{2} B r C_{2} H_{5} O H - ---- \to (C H_{3})_{2} C H - C H_{2} O C_{2} H_{5} + H B r$ (ii) $(C H_{3})_{2} C H - C H_{2} B r C_{2} H_{S} O^{-} - ---- \to (C H_{3})_{2} C H C H_{2} O C_{2} H_{5} + B r^{-}$ The mechanism of reactions (i) & (ii) are respectively

30.

Consider the reactions(i) (CH3)2CH−CH2BrC2H5OH−−−−−→(CH3)2CH−CH2OC2H5+HBr(ii) (CH3)2CH−CH2BrC2HSO−−−−−−→(CH3)2 CH CH2OC2H5+Br− The mechanism of reactions (i) & (ii) are respectively

Answer»

Consider the reactions

(i) $(C H_{3})_{2} C H - C H_{2} B r C_{2} H_{5} O H - ---- \to (C H_{3})_{2} C H - C H_{2} O C_{2} H_{5} + H B r$

(ii) $(C H_{3})_{2} C H - C H_{2} B r C_{2} H_{S} O^{-} - ---- \to (C H_{3})_{2} C H C H_{2} O C_{2} H_{5} + B r^{-}$

The mechanism of reactions (i) & (ii) are respectively

Discussion

31.	If wavelength of 470 nm falls on the surface of potassium metals, eletcrons are emitted with a velocity of 6.4×105 m s−1.The work function of potassium metal is:
Answer» If wavelength of $470 nm$ falls on the surface of potassium metals, eletcrons are emitted with a velocity of $6.4 \times 10^{5} {m s}^{- 1}$ . The work function of potassium metal is:

Discussion

32.	70 In a metal oxide, 20% by weight oxygen is present, calculate equivalent weight of metal sulphate A- 52 B- 40 C- 80 D- 96
Answer» 70 In a metal oxide, 20% by weight oxygen is present, calculate equivalent weight of metal sulphate A- 52 B- 40 C- 80 D- 96

Discussion

33.	The most stable enol form of the following compound is :
Answer» The most stable enol form of the following compound is :

Discussion

34.	White phosphorous is a tetra atomic solid [P4(s)] at room temperature and on strong heating in absence of oxygen, it polymerizes into red phosphorus as:ΔH=−104 kJ/mol of P4The enthalpy of sublimation [P4(s)→P4(g)] white is 59 kJ/mol and enthalpy of atomization is 316.25 kJ/mol of P(g).Now find the average P−P bond enthalpy in P4 molecule is:
Answer» White phosphorous is a tetra atomic solid $[P_{4} (s)]$ at room temperature and on strong heating in absence of oxygen, it polymerizes into red phosphorus as: $Δ H = - 104 kJ/mol of P_{4}$ The enthalpy of sublimation $[P_{4} (s) \to P_{4} (g)]$ white is $59 kJ/mol$ and enthalpy of atomization is $316.25 kJ/mol$ of $P (g)$ . Now find the average $P - P$ bond enthalpy in $P_{4}$ molecule is:

Discussion

35.	How many 3d electrons can have spin quantum number -½?1) 52) 73) 84) 10
Answer» How many 3d electrons can have spin quantum number -½? 1) 5 2) 7 3) 8 4) 10

Discussion

36.	Find ratio. 13hours to 169minuyes
Answer» Find ratio. 13hours to 169minuyes

Discussion

37.	Identify the correct order.
Answer» Identify the correct order.

Discussion

38.	How many chiral isomers can be drawn from 2-bromo, 3-chloro butane
Answer» How many chiral isomers can be drawn from 2-bromo, 3-chloro butane

38.

How many chiral isomers can be drawn from 2-bromo, 3-chloro butane

Answer»

How many chiral isomers can be drawn from 2-bromo, 3-chloro butane

Discussion

39.	For a first order reaction, A(g)→2B(g)+C(g), the rate constant in terms of initial pressure P0 and pressure at time t(Pt), is given by:
Answer» For a first order reaction, $A (g) \to 2 B (g) + C (g)$ , the rate constant in terms of initial pressure $P_{0}$ and pressure at time $t (P_{t})$ , is given by:

Discussion

40.	A proton, a deuteron and an α particle having same momentum enter a uniform magnetic field at right angles to the field. The ratio of their angular momentum with respect to their corresponding centres during their motion in the magnetic field is
Answer» A proton, a deuteron and an $α$ particle having same momentum enter a uniform magnetic field at right angles to the field. The ratio of their angular momentum with respect to their corresponding centres during their motion in the magnetic field is

Discussion

41.	Hydrolysis of SiCl4 gives?
Answer» Hydrolysis of $S i C l_{4}$ gives?

Discussion

42.	6. How to convert Acetaldehyde to Prop-2-enoic acid?
Answer» 6. How to convert Acetaldehyde to Prop-2-enoic acid?

Discussion

43.	(1) −C≡N , (2) −CONH2 , (3) −O\|\|C−, (4)−CHO The decreasing order of priority for the given functional groups (for IUPAC nomenclature) is:
Answer» (1) $- C \equiv N$ , (2) $- C O N H_{2}$ , (3) $- O \| \| C -$ , (4) $- C H O$ The decreasing order of priority for the given functional groups (for IUPAC nomenclature) is:

Discussion

44.	An insulated container of two diatomic gases has two chambers separated by an insulting partition. One of the chambers has volume V1 and contains ideal gas at pressure p1 and temperature T1. The other chamber has volume V2 and contains ideal gas at pressure p2 and temperature T2. If the partition is removed without doing any work on the gas, the final equilibrium temperature of the gas in the container will be
Answer» An insulated container of two diatomic gases has two chambers separated by an insulting partition. One of the chambers has volume $V_{1}$ and contains ideal gas at pressure $p_{1}$ and temperature $T_{1}$ . The other chamber has volume $V_{2}$ and contains ideal gas at pressure $p_{2}$ and temperature $T_{2}$ . If the partition is removed without doing any work on the gas, the final equilibrium temperature of the gas in the container will be

Discussion

45.	Indian lifestyle was quite environment-friendly but globalisation has brought a change in lifestyle which is not environment-friendly. Do you agree? Justify your answer.
Answer» Indian lifestyle was quite environment-friendly but globalisation has brought a change in lifestyle which is not environment-friendly. Do you agree? Justify your answer.

Discussion

46.	The ratio of most probable velocity to average velocity is:
Answer» The ratio of most probable velocity to average velocity is:

Discussion

47.	nacl solution is added to a saturated solution of pbcl2. what will happen to the concentration of pb+2 ions
Answer» nacl solution is added to a saturated solution of pbcl2. what will happen to the concentration of pb+2 ions

Discussion

48.	Is the difference between valency, valence and oxidation State. Do all three terms mean the same or are all the terms different? give me definition of valency, valence and oxidation State which cover all points
Answer» Is the difference between valency, valence and oxidation State. Do all three terms mean the same or are all the terms different? give me definition of valency, valence and oxidation State which cover all points

Discussion

49.	Which of the following possess identical crystal structure (a) Mg and Ar (b) solid CO_2 and ic
Answer» Which of the following possess identical crystal structure (a) Mg and Ar (b) solid CO_2 and ic

Discussion

50.	Increasing order of stability among the three main conformations (i.e., anti, eclipse, gauche) of 2−flouro ethanol is:
Answer» Increasing order of stability among the three main conformations (i.e., anti, eclipse, gauche) of $2 - flouro ethanol$ is:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The most likely reason for the development of resistance against pesticides in insect-damaged crop is

the vapour pressure of pure liquids Aand B are 200 and 350 mm hg respectively , at 300k . mole fraction of liquid A in a mixture having its vapour pressure 305mm of Hg i

10. What is the mole fraction of NaOH in 1 molal solution?

A common emitter amplifier has a voltage gain of 50 and current gain is 25. The power gain of the amplifier is 125x. The value of x is (integer only)

In the following molecule:The hybridisations of carbon a, b and c respectively are:

An electric kettle heater has two coils. When one coil is switched ON, the water in the kettle begins to boil after 15 minutes, If the other coil is switched on, the water boils in 30 minutes. Which of the following statement is correct.

The ratio of the energy of a photon of 2000 oA wavelength radiation to that of 4000 oA radiation is:

How number of electrons affect the effective nuclear charge and ionic radius?

Among the given compounds, the increasing order of stability of conjugate base is :

how much mass of sodium acetate is required to make 250ml of 0.575 molar aqueous solution

Define Quantisation of energy.

H3C−CH3|C|CH3−O−K++CH3−Br→Y+KBr Which of the following is not possible for Y?

The difference in the oxidation number of two types of S-atoms in Na2S4O6 is ___.

The product of the intramolecular aldol condensation of the given substrate is

The correct order of basic strength of the following is

Acetadehyde reacts with thionyl chloride to give (the main product)

What is the hybridization of CH2=CH2

Heat of hydrogenation of ethene and benzene are x1 and x2. What will be the correct expression for resonance energy of Benzene?

The amount of Naoh is required to neutralize 1500cm3 of 0.1 N HCl

Ozonolysis of 2-methyl butene-2 yields

The enthalpy of hydrogenation of cyclohexene is −119.5 kJ/ mol. If resonance energy of benzene is −150.4 kJ/mol then what is its enthalpy of hydrogenation?

The enthalpy of hydrogenation of cyclohexene is –119.5 kJ mol–1. If resonance energy of benzene is –150.4 kJ mol–1, its enthalpy of hydrogenation would be

Arrange the following in increasing order of their bond angle and also state the reason: 1) OF2, H2O, Cl2O 2) BeCl2, BCl3, CCl2

Define Lewis Dot Structure.

Heat of reaction for, CO(g) + 1/2 O2(g)→ CO2(g)at constant V is-67.71 K cal at 17^° C. The heat of reaction at constant P at 17^° C is

What is the noun form of the word? Errant

Explain why the molecular shape of boron trifluoride is trigonal planar.

Consider the reactions(i) (CH3)2CH−CH2BrC2H5OH−−−−−→(CH3)2CH−CH2OC2H5+HBr(ii) (CH3)2CH−CH2BrC2HSO−−−−−−→(CH3)2 CH CH2OC2H5+Br− The mechanism of reactions (i) &amp; (ii) are respectively

If wavelength of 470 nm falls on the surface of potassium metals, eletcrons are emitted with a velocity of 6.4×105 m s−1.The work function of potassium metal is:

70 In a metal oxide, 20% by weight oxygen is present, calculate equivalent weight of metal sulphate A- 52 B- 40 C- 80 D- 96

The most stable enol form of the following compound is :

How many 3d electrons can have spin quantum number -½?1) 52) 73) 84) 10

Find ratio. 13hours to 169minuyes

Identify the correct order.

How many chiral isomers can be drawn from 2-bromo, 3-chloro butane

For a first order reaction, A(g)→2B(g)+C(g), the rate constant in terms of initial pressure P0 and pressure at time t(Pt), is given by:

A proton, a deuteron and an α particle having same momentum enter a uniform magnetic field at right angles to the field. The ratio of their angular momentum with respect to their corresponding centres during their motion in the magnetic field is

Hydrolysis of SiCl4 gives?

6. How to convert Acetaldehyde to Prop-2-enoic acid?

(1) −C≡N , (2) −CONH2 , (3) −O||C−, (4)−CHO The decreasing order of priority for the given functional groups (for IUPAC nomenclature) is:

Indian lifestyle was quite environment-friendly but globalisation has brought a change in lifestyle which is not environment-friendly. Do you agree? Justify your answer.

The ratio of most probable velocity to average velocity is:

nacl solution is added to a saturated solution of pbcl2. what will happen to the concentration of pb+2 ions

Is the difference between valency, valence and oxidation State. Do all three terms mean the same or are all the terms different? give me definition of valency, valence and oxidation State which cover all points

Which of the following possess identical crystal structure (a) Mg and Ar (b) solid CO_2 and ic

Increasing order of stability among the three main conformations (i.e., anti, eclipse, gauche) of 2−flouro ethanol is:

Consider the reactions(i) (CH3)2CH−CH2BrC2H5OH−−−−−→(CH3)2CH−CH2OC2H5+HBr(ii) (CH3)2CH−CH2BrC2HSO−−−−−−→(CH3)2 CH CH2OC2H5+Br− The mechanism of reactions (i) & (ii) are respectively