46295 + Interview Questions in Chemistry

1.	The rate of the chemical reaction doubles for an increase of 10 K in absolute temperature from 298 K. Calculate Ea.
Answer» The rate of the chemical reaction doubles for an increase of 10 K in absolute temperature from 298 K. Calculate E_a.

Discussion

2.	The number of ligands present in NH+4 is
Answer» The number of ligands present in $N H_{4}^{+}$ is

Discussion

3.	relative decrese in vapou presssure is .4 for a solution containing 1 mole of AB and 3 mole of water therefore ab is ioniseed to a extent of-100%
Answer» relative decrese in vapou presssure is .4 for a solution containing 1 mole of AB and 3 mole of water therefore ab is ioniseed to a extent of-100%

Discussion

4.	hello i am really sorry for using the wrong word.. i apolosize to the whole team member of byjus.....i will take care that i will not do again.....
Answer» hello i am really sorry for using the wrong word.. i apolosize to the whole team member of byjus.....i will take care that i will not do again.....

Discussion

5.	The Henry's law constant for the solubility of N2 gas in water at 298 K is 1×105 atm. The mole fraction of N2 in air is 0.8. Then the number of moles of N2 dissolved in 10 moles of water at 298 K and 5 atm pressure is:
Answer» The Henry's law constant for the solubility of $N_{2}$ gas in water at $298 K$ is $1 \times 10^{5} atm$ . The mole fraction of $N_{2}$ in air is $0.8$ . Then the number of moles of $N_{2}$ dissolved in $10$ moles of water at $298 K$ and $5 atm$ pressure is:

Discussion

6.	In some of the reactions thallium resembles aluminium, whereas in others it resembles with group I metals. Support this statement by giving some evidences.
Answer» In some of the reactions thallium resembles aluminium, whereas in others it resembles with group I metals. Support this statement by giving some evidences.

Discussion

7.	Which is the major product of the sulphonation of chlorobenzene?
Answer» Which is the major product of the sulphonation of chlorobenzene?

Discussion

8.	Arrangeeach set of compounds in order of increasing boiling points.(i) Bromomethane, Bromoform, Chloromethane, Dibromomethane.(ii) 1-Chloropropane, Isopropyl chloride, 1-Chlorobutane.
Answer» Arrange each set of compounds in order of increasing boiling points. (i) Bromomethane, Bromoform, Chloromethane, Dibromomethane. (ii) 1-Chloropropane, Isopropyl chloride, 1-Chlorobutane.

8.

Arrangeeach set of compounds in order of increasing boiling points.(i) Bromomethane, Bromoform, Chloromethane, Dibromomethane.(ii) 1-Chloropropane, Isopropyl chloride, 1-Chlorobutane.

Answer»

Arrange
each set of compounds in order of increasing boiling points.

(i)
Bromomethane, Bromoform, Chloromethane, Dibromomethane.

(ii)
1-Chloropropane, Isopropyl chloride, 1-Chlorobutane.

Discussion

9.	Define strong and weak electrolytes.
Answer» Define strong and weak electrolytes.

Discussion

10.	In context with the industrial preparation of hydrogen from water gas $(CO + H_2),$ which of the following is the correct statement?
Answer» In context with the industrial preparation of hydrogen from water gas $(CO + H_2),$ which of the following is the correct statement?

Discussion

11.	52.Explain electrochemical series really and difference bet reducing agent and oxidising agent. .oxidation potential and reduction potential and reduction and oxidation power
Answer» 52.Explain electrochemical series really and difference bet reducing agent and oxidising agent. .oxidation potential and reduction potential and reduction and oxidation power

Discussion

12.	The compound which can show SN2 reaction during solvolysis is:
Answer» The compound which can show $S_{N} 2$ reaction during solvolysis is:

Discussion

13.	When 50cm3 of 0.2N h2so4 is mixed with 50cm3 of 1N koh then the heat of liberation is ??
Answer» When 50cm3 of 0.2N h2so4 is mixed with 50cm3 of 1N koh then the heat of liberation is ??

Discussion

14.	Which of the following is the most stable carbanion?
Answer» Which of the following is the most stable carbanion?

Discussion

15.	Rate of reaction A + 2B --> C is 2x10^-2 mol/lit/sec. When the conc. of A and B are 1mole/lit., Rate= K[A]^2[B].The rate when half of B reacted?Rate of any reaction increases with temperature.Explain? And what about exothermic reversible reaction
Answer» Rate of reaction A + 2B --> C is 2x10^-2 mol/lit/sec. When the conc. of A and B are 1mole/lit., Rate= K[A]^2[B]. The rate when half of B reacted? Rate of any reaction increases with temperature.Explain? And what about exothermic reversible reaction

Discussion

16.	Why is the extraction of copper from pyrites more difficult than that from its oxide ore through reduction?
Answer» Why is the extraction of copper from pyrites more difficult than that from its oxide ore through reduction?

Discussion

17.	If we completely annihilate a hair of your body that has a mass of 1 μg, how much energy will we get in the process?
Answer» If we completely annihilate a hair of your body that has a mass of $1 μg$ , how much energy will we get in the process?

Discussion

18.	A first order reaction is 50% complete in 20 minutes at 27 ∘C and in 5 minutes at 47 ∘C. The energy of activation of the reaction is:
Answer» A first order reaction is 50% complete in 20 minutes at $27^{\circ} C$ and in 5 minutes at $47^{\circ} C$ . The energy of activation of the reaction is:

Discussion

19.	Give the IUPAC name of the following compound. CH2=CH−CH(CH3)2
Answer» Give the IUPAC name of the following compound. $C H_{2} = C H - C H (C H_{3})_{2}$

19.

Give the IUPAC name of the following compound. CH2=CH−CH(CH3)2

Answer»

Give the IUPAC name of the following compound.

$C H_{2} = C H - C H (C H_{3})_{2}$

Discussion

20.	Calculate the wavelength of a light wave whose time period is 3×10−10 s.
Answer» Calculate the wavelength of a light wave whose time period is $3 \times 10^{- 10} s$ .

Discussion

21.	Which of the following forms a stable +4 oxidation state?
Answer» Which of the following forms a stable +4 oxidation state?

Discussion

22.	The height of Victoria falls is 63 m. What is the difference in temperature of water at the top and at the bottom of fall ?[Given 1 cal=4.2 J and specific heat of water =1 cal g−1C−1]
Answer» The height of Victoria falls is $63 m$ . What is the difference in temperature of water at the top and at the bottom of fall ? [Given $1 cal = 4.2 J$ and specific heat of water $= 1 c a l g^{- 1} C^{- 1}]$

Discussion

23.	What is the expression for integrated rate equation for second order when concentration of reactant A and B are different?
Answer» What is the expression for integrated rate equation for second order when concentration of reactant A and B are different?

Discussion

24.	integrate dx/2x+3 with limits from 1 to 0
Answer» integrate dx/2x+3 with limits from 1 to 0

Discussion

25.	The maximum number of electrons in an atom that follows the condition n + l = 6 (n → principal quantum number, l → Azimuthal quantum number)
Answer» The maximum number of electrons in an atom that follows the condition n + l = 6 (n $\to$ principal quantum number, l $\to$ Azimuthal quantum number)

Discussion

26.	Which of the following equimolar solutionhighest vapour pressure?(2) Nac(1) Glucose(4) KFe(CN(3) KSO
Answer» Which of the following equimolar solutionhighest vapour pressure?(2) Nac(1) Glucose(4) KFe(CN(3) KSO

Discussion

27.	structure of4 ethoxy 1,1 dimethyl cyclohexan
Answer» structure of4 ethoxy 1,1 dimethyl cyclohexan

Discussion

28.	Choose the incorrect order of stability :
Answer» Choose the incorrect order of stability :

Discussion

29.	The value of determinant using sarrus method ∣∣∣∣−12−33−2121−3∣∣∣∣ is
Answer» The value of determinant using sarrus method $∣ ∣∣ ∣ \begin{matrix} - 1 & 2 & - 3 3 & - 2 & 1 2 & 1 & - 3 \end{matrix} ∣ ∣∣ ∣$ is

Discussion

30.	One mole of anhydrous salt AB dissolves inwater and liberates 15 J mol-1 of heat. The value ofdrs fon of AB is -20.5 J mol-1. Hence, the enthalpyof dissolution of hydrated salt AB.3H20(s) isAHO
Answer» One mole of anhydrous salt AB dissolves inwater and liberates 15 J mol-1 of heat. The value ofdrs fon of AB is -20.5 J mol-1. Hence, the enthalpyof dissolution of hydrated salt AB.3H20(s) isAHO

Discussion

31.	The temperature, at which the vapour pressure of a liquid becomes equal to the atmospheric pressure is known as
Answer» The temperature, at which the vapour pressure of a liquid becomes equal to the atmospheric pressure is known as

Discussion

32.	3 Why trichloroethanal cannot give Canizzaro Reaction?
Answer» 3 Why trichloroethanal cannot give Canizzaro Reaction?

Discussion

33.	What is host cells clean explanation
Answer» What is host cells clean explanation

Discussion

34.	What is the value of ΔfH∘(C2H6,g) ? Given: ΔfH∘(CH4,g) = −66kJ/mol; ΔsubH∘(C,S) = 718 kJ/mol B.E.(C - C) = 345 kJ/mol, B.E.(H - H) = 436kJ/mol
Answer» What is the value of $Δ_{f} H^{\circ} (C_{2} H_{6}, g)$ ? Given: $Δ_{f} H^{\circ} (C H_{4}, g)$ = $- 66 k J / m o l$ ; $Δ_{s u b} H^{\circ} (C, S) = 718 k J / m o l$ B.E.(C - C) = $345 k J / m o l$ , B.E.(H - H) = $436 k J / m o l$

34.

What is the value of ΔfH∘(C2H6,g) ? Given: ΔfH∘(CH4,g) = −66kJ/mol; ΔsubH∘(C,S) = 718 kJ/mol B.E.(C - C) = 345 kJ/mol, B.E.(H - H) = 436kJ/mol

Answer»

What is the value of $Δ_{f} H^{\circ} (C_{2} H_{6}, g)$ ?

Given:

$Δ_{f} H^{\circ} (C H_{4}, g)$ = $- 66 k J / m o l$ ; $Δ_{s u b} H^{\circ} (C, S) = 718 k J / m o l$

B.E.(C - C) = $345 k J / m o l$ , B.E.(H - H) = $436 k J / m o l$

Discussion

35.	Compound which has the highest thermal stability is?
Answer» Compound which has the highest thermal stability is?

Discussion

36.	if the pracrically 3 spins are possible then the number of element in second periodic
Answer» if the pracrically 3 spins are possible then the number of element in second periodic

Discussion

37.	The concentration of formate ion (HCOO−) present in 0.1 M formic acid (HCOOH) solution at equilibrium is : (Ka=1.6×10−4)
Answer» The concentration of formate ion $(H C O O^{-})$ present in 0.1 M formic acid $(H C O O H)$ solution at equilibrium is : $(K_{a} = 1.6 \times 10^{- 4})$

Discussion

38.	Given that bond energies of H-H and Cl-Cl are 430 kJ /mol and 240 KJ/mol respectively and △ H_f for HCl is - 90 KJ/mol. Bond enthalpy of HCl
Answer» Given that bond energies of H-H and Cl-Cl are 430 kJ /mol and 240 KJ/mol respectively and △ H_f for HCl is - 90 KJ/mol. Bond enthalpy of HCl

Discussion

39.	The volume of chlorine gas at STP (in Litres) required to completely react with 5 moles of hot and concentrated NaOH solution is:
Answer» The volume of chlorine gas at $S T P$ (in $L i t r e s$ ) required to completely react with 5 moles of hot and concentrated $N a O H$ solution is:

Discussion

40.	Find the density (in gm/ml) of a 3.6M sulphuric acid solution that is 29% H2SO4 by mass ?
Answer» Find the density (in gm/ml) of a 3.6M sulphuric acid solution that is 29% H2SO4 by mass ?

Discussion

41.	What is the concept of mole and its measuremental formulaes
Answer» What is the concept of mole and its measuremental formulaes

Discussion

42.	Which type of void is present in body centred cubic lattice
Answer» Which type of void is present in body centred cubic lattice

Discussion

43.	Q3. Consider the following statements with respect to Polymer sponge: 1. Polymer sponge is developed using waste products from the petroleum and refining industries. 2. This application can consume excess waste sulphur that is stockpiled around the globe. Which of the above statements are correct?
Answer» Q3. Consider the following statements with respect to Polymer sponge: 1. Polymer sponge is developed using waste products from the petroleum and refining industries. 2. This application can consume excess waste sulphur that is stockpiled around the globe. Which of the above statements are correct?

43.

Q3. Consider the following statements with respect to Polymer sponge: 1. Polymer sponge is developed using waste products from the petroleum and refining industries. 2. This application can consume excess waste sulphur that is stockpiled around the globe. Which of the above statements are correct?

Answer»

Q3. Consider the following statements with respect to Polymer sponge:

1. Polymer sponge is developed using waste products from the petroleum and refining industries.

2. This application can consume excess waste sulphur that is stockpiled around the globe.

Which of the above statements are correct?

Discussion

44.	To find the ratio of kinetic energy of proton and alpha particle if their wavelength are same
Answer» To find the ratio of kinetic energy of proton and alpha particle if their wavelength are same

Discussion

45.	Which of the following is most reactive towards electrophilic substitution reaction ?
Answer» Which of the following is most reactive towards electrophilic substitution reaction ?

Discussion

46.	A small metal sphere carrying a charge +Q is located at the centre of a spherical cavity in a large uncharged metallic spherical shell.Write the charges on the inner and outer surfaces of the shell.
Answer» A small metal sphere carrying a charge +Q is located at the centre of a spherical cavity in a large uncharged metallic spherical shell.Write the charges on the inner and outer surfaces of the shell.

Discussion

47.	What is isomorphism
Answer» What is isomorphism

Discussion

48.	Decomposition of HCl is which order reaction ?
Answer» Decomposition of HCl is which order reaction ?

Discussion

49.	The vapour pressure of a solution having 2.0 g of solute X (gram atomic mass=32 g/mol) in 100 g of CS2 (vapour pressure =854torr) is 848.9 torr.The molecular formula of solute 1) X 2)X2 3)X4 4)X8
Answer» The vapour pressure of a solution having 2.0 g of solute X (gram atomic mass=32 g/mol) in 100 g of CS2 (vapour pressure =854torr) is 848.9 torr.The molecular formula of solute 1) X 2)X2 3)X4 4)X8

Discussion

50.	For alkali metal M:M2O+H2O→xM2O2+H2O→x+yMO2+H2O→x+y+zSum of the number of atoms present in one molecule of each of x, y, z is:
Answer» For alkali metal $M$ : $M_{2} O + H_{2} O \to x M_{2} O_{2} + H_{2} O \to x + y M O_{2} + H_{2} O \to x + y + z$ Sum of the number of atoms present in one molecule of each of $x, y, z$ is:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The rate of the chemical reaction doubles for an increase of 10 K in absolute temperature from 298 K. Calculate Ea.

The number of ligands present in NH+4 is

relative decrese in vapou presssure is .4 for a solution containing 1 mole of AB and 3 mole of water therefore ab is ioniseed to a extent of-100%

hello i am really sorry for using the wrong word.. i apolosize to the whole team member of byjus.....i will take care that i will not do again.....

The Henry's law constant for the solubility of N2 gas in water at 298 K is 1×105 atm. The mole fraction of N2 in air is 0.8. Then the number of moles of N2 dissolved in 10 moles of water at 298 K and 5 atm pressure is:

In some of the reactions thallium resembles aluminium, whereas in others it resembles with group I metals. Support this statement by giving some evidences.

Which is the major product of the sulphonation of chlorobenzene?

Arrangeeach set of compounds in order of increasing boiling points.(i) Bromomethane, Bromoform, Chloromethane, Dibromomethane.(ii) 1-Chloropropane, Isopropyl chloride, 1-Chlorobutane.

Define strong and weak electrolytes.

In context with the industrial preparation of hydrogen from water gas \((CO + H_2),\) which of the following is the correct statement?

52.Explain electrochemical series really and difference bet reducing agent and oxidising agent. .oxidation potential and reduction potential and reduction and oxidation power

The compound which can show SN2 reaction during solvolysis is:

When 50cm3 of 0.2N h2so4 is mixed with 50cm3 of 1N koh then the heat of liberation is ??

Which of the following is the most stable carbanion?

Rate of reaction A + 2B --> C is 2x10^-2 mol/lit/sec. When the conc. of A and B are 1mole/lit., Rate= K[A]^2[B].The rate when half of B reacted?Rate of any reaction increases with temperature.Explain? And what about exothermic reversible reaction

Why is the extraction of copper from pyrites more difficult than that from its oxide ore through reduction?

If we completely annihilate a hair of your body that has a mass of 1 μg, how much energy will we get in the process?

A first order reaction is 50% complete in 20 minutes at 27 ∘C and in 5 minutes at 47 ∘C. The energy of activation of the reaction is:

Give the IUPAC name of the following compound. CH2=CH−CH(CH3)2

Calculate the wavelength of a light wave whose time period is 3×10−10 s.

Which of the following forms a stable +4 oxidation state?

The height of Victoria falls is 63 m. What is the difference in temperature of water at the top and at the bottom of fall ?[Given 1 cal=4.2 J and specific heat of water =1 cal g−1C−1]

What is the expression for integrated rate equation for second order when concentration of reactant A and B are different?

integrate dx/2x+3 with limits from 1 to 0

The maximum number of electrons in an atom that follows the condition n + l = 6 (n → principal quantum number, l → Azimuthal quantum number)

Which of the following equimolar solutionhighest vapour pressure?(2) Nac(1) Glucose(4) KFe(CN(3) KSO

structure of4 ethoxy 1,1 dimethyl cyclohexan

Choose the incorrect order of stability :

The value of determinant using sarrus method ∣∣∣∣−12−33−2121−3∣∣∣∣ is

One mole of anhydrous salt AB dissolves inwater and liberates 15 J mol-1 of heat. The value ofdrs fon of AB is -20.5 J mol-1. Hence, the enthalpyof dissolution of hydrated salt AB.3H20(s) isAHO

The temperature, at which the vapour pressure of a liquid becomes equal to the atmospheric pressure is known as

3 Why trichloroethanal cannot give Canizzaro Reaction?

What is host cells clean explanation ​​​​​​

What is the value of ΔfH∘(C2H6,g) ? Given: ΔfH∘(CH4,g) = −66kJ/mol; ΔsubH∘(C,S) = 718 kJ/mol B.E.(C - C) = 345 kJ/mol, B.E.(H - H) = 436kJ/mol

Compound which has the highest thermal stability is?

if the pracrically 3 spins are possible then the number of element in second periodic

The concentration of formate ion (HCOO−) present in 0.1 M formic acid (HCOOH) solution at equilibrium is : (Ka=1.6×10−4)

Given that bond energies of H-H and Cl-Cl are 430 kJ /mol and 240 KJ/mol respectively and △ H_f for HCl is - 90 KJ/mol. Bond enthalpy of HCl

The volume of chlorine gas at STP (in Litres) required to completely react with 5 moles of hot and concentrated NaOH solution is:

Find the density (in gm/ml) of a 3.6M sulphuric acid solution that is 29% H2SO4 by mass ?

What is the concept of mole and its measuremental formulaes

Which type of void is present in body centred cubic lattice

Q3. Consider the following statements with respect to Polymer sponge: 1. Polymer sponge is developed using waste products from the petroleum and refining industries. 2. This application can consume excess waste sulphur that is stockpiled around the globe. Which of the above statements are correct?

To find the ratio of kinetic energy of proton and alpha particle if their wavelength are same

Which of the following is most reactive towards electrophilic substitution reaction ?

A small metal sphere carrying a charge +Q is located at the centre of a spherical cavity in a large uncharged metallic spherical shell.Write the charges on the inner and outer surfaces of the shell.

What is isomorphism

Decomposition of HCl is which order reaction ?

The vapour pressure of a solution having 2.0 g of solute X (gram atomic mass=32 g/mol) in 100 g of CS2 (vapour pressure =854torr) is 848.9 torr.The molecular formula of solute 1) X 2)X2 3)X4 4)X8

For alkali metal M:M2O+H2O→xM2O2+H2O→x+yMO2+H2O→x+y+zSum of the number of atoms present in one molecule of each of x, y, z is:

What is host cells clean explanation