Explore topic-wise InterviewSolutions in Current Affairs.

This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.

1.

The correct IUPAC name of the compound is

Answer»

The correct IUPAC name of the compound is

2.

In order to measure physical quantities in the sub atomic world, the quantum theory often employs energy[E], angular momentum[J] and velocity[c] as fundamental dimension instead of the usual mass,length and time.Then, the dimension of pressure in this theory is ?

Answer» In order to measure physical quantities in the sub atomic world, the quantum theory often employs energy[E], angular momentum[J] and velocity[c] as fundamental dimension instead of the usual mass,length and time.Then, the dimension of pressure in this theory is ?
3.

At what temperature is the root mean square speed of N2 gas equal to that of propane gas at 440 K?

Answer»

At what temperature is the root mean square speed of N2 gas equal to that of propane gas at 440 K?


4.

This question and the following one were a part of a linked comprehension in the (IIT-JEE, 2008) exam. Redox reactions play a pivotal role in chemistry and biology. The values of standard redox potential (E⊖) of two half cell reactions decided which way the reaction is expected to proceed. A simple example is a Daniell cell in which zinc goes into solution and copper gets deposited. Given below are a set of half cell reactions (acidic medium) along with their E⊖ (V with respect to normal hydrogen electrode) values. Using this data, obtain correct explanations for the follwing questions. I2+2e−→2I⊖; E⊖=0.54 Cl2+2e−→2CI⊖; E⊖=1.36 Mn3++e−→Mn2+; E⊖=1.50 Fe3++e−→Fe2+; E⊖=0.77 O2+4H⨁+4e−→2H2I; E⊖=1.23 Among the following, identify the correct statement.

Answer»

This question and the following one were a part of a linked comprehension in the (IIT-JEE, 2008) exam.

Redox reactions play a pivotal role in chemistry and biology. The values of standard redox potential (E) of two half cell reactions decided which way the reaction is expected to proceed. A simple example is a Daniell cell in which zinc goes into solution and copper gets deposited. Given below are a set of half cell reactions (acidic medium) along with their E (V with respect to normal hydrogen electrode) values. Using this data, obtain correct explanations for the follwing questions.
I2+2e2I; E=0.54
Cl2+2e2CI; E=1.36
Mn3++eMn2+; E=1.50
Fe3++eFe2+; E=0.77
O2+4H+4e2H2I; E=1.23

Among the following, identify the correct statement.


5.

For photo-electric effect with incident photon wavelength λ, the stopping potential is V0. Identify the correct variation(s) of V0 with λ and 1/λ.

Answer»

For photo-electric effect with incident photon wavelength λ, the stopping potential is V0. Identify the correct variation(s) of V0 with λ and 1/λ.



6.

Which of the following are Aromatic in nature.

Answer»

Which of the following are Aromatic in nature.


7.

The most common oxidation state of fluorine is:

Answer»

The most common oxidation state of fluorine is:


8.

When limestone is added to the blast furnace in the metallurgy of iron, the calcium ions can form:

Answer» When limestone is added to the blast furnace in the metallurgy of iron, the calcium ions can form:
9.

How to balance this by oxidation number method H2O2(aq)+Fe2(aq)+⟶Fe3(aq)+H2O(l) [in acidic medium)

Answer»

How to balance this by oxidation number method H2O2(aq)+Fe2(aq)+Fe3(aq)+H2O(l) [in acidic medium)

10.

Identify the least stable ion amongst the following.

Answer»

Identify the least stable ion amongst the following.


11.

Acetone on reaction with Zn(Hg), HCl gives

Answer» Acetone on reaction with Zn(Hg), HCl gives
12.

Gypsum is

Answer»

Gypsum is


13.

Difference between natural and exponential logarithm

Answer» Difference between natural and exponential logarithm
14.

For a reaction ΔH = 9.08 kJ mol−1 and ΔS = 35.7 JK−1mol−1. Which of the following statements is correct for the reaction

Answer»

For a reaction ΔH = 9.08 kJ mol1 and ΔS = 35.7 JK1mol1. Which of the following statements is correct for the reaction


15.

Number of diastereomeric pairs formed in the above reactions is:

Answer»
Number of diastereomeric pairs formed in the above reactions is:
16.

The reaction between sodium and water can be made less vigorous by

Answer» The reaction between sodium and water can be made less vigorous by
17.

Assuming complete ionisation, same moles of which of the following compounds will require the least amount of acidified KMnO4 for complete oxidation?

Answer»

Assuming complete ionisation, same moles of which of the following compounds will require the least amount of acidified KMnO4 for complete oxidation?

18.

100 mL of 0.2 N HNO3 at 25 oC was mixed with 100 mL of 0.2 N NaOH for neutrilization at the same temperature. The final temperature was recorded to be 26.37 oC. Calculate the heat of neutrilization (in~kcal) of HNO3 with NaOH.

Answer» 100 mL of 0.2 N HNO3 at 25 oC was mixed with 100 mL of 0.2 N NaOH for neutrilization at the same temperature. The final temperature was recorded to be 26.37 oC. Calculate the heat of neutrilization (in~kcal) of HNO3 with NaOH.
19.

The rate of a reaction doubles when its temperature changes form 300 K to 310 K. Activation energy of such a reaction will be (R=8.314 JK−1 mol−1 and log 2=0.301)

Answer»

The rate of a reaction doubles when its temperature changes form 300 K to 310 K. Activation energy of such a reaction will be (R=8.314 JK1 mol1 and log 2=0.301)


20.

The transition metal present in vitamin B12 is:

Answer»

The transition metal present in vitamin B12 is:


21.

Mixture of C6H5CHO and HCHO is treated with NaOH, then this reaction involves:

Answer» Mixture of C6H5CHO and HCHO is treated with NaOH, then this reaction involves:
22.

The compound which could not act both as oxidising as well as reducing agent is

Answer»

The compound which could not act both as oxidising as well as reducing agent is


23.

Equilibrium constants K1 and K2 for the following equilibria are NO(g) + 0.5O2(g) →K1 NO2(g) and 2NO2(g) →K2 2NO(g) + O2(g)

Answer»

Equilibrium constants K1 and K2 for the following equilibria are

NO(g) + 0.5O2(g) K1 NO2(g) and
2NO2(g) K2 2NO(g) + O2(g)


24.

IP1 and IP2 of Mg are 178 and 348 k cal mol−1. The energy required for the reaction Mg → Mg2+ + 2e− is

Answer»

IP1 and IP2 of Mg are 178 and 348 k cal mol1. The energy required for the reaction Mg Mg2+ + 2e is


25.

4.5 g of Aluminium is deposited at cathode from Al3+ solutions by a certain quantity of electric charge. The volume of hydrogen produced at STP from H+ ions in solution by the same quantity of electric charge will be:

Answer»

4.5 g of Aluminium is deposited at cathode from Al3+ solutions by a certain quantity of electric charge. The volume of hydrogen produced at STP from H+ ions in solution by the same quantity of electric charge will be:


26.

What is average speed?

Answer» What is average speed?
27.

Which of the following is a free radical substitution?

Answer»

Which of the following is a free radical substitution?


28.

Ksp of Mg(OH)2=5.4×10−12andKb for NH3=1.8×10−5.KC for the reaction Mg(OH)2(s)+2NH+4⇔2NH3+H2O+Mg2+ is

Answer» Ksp of Mg(OH)2=5.4×1012andKb for NH3=1.8×105.KC for the reaction Mg(OH)2(s)+2NH+42NH3+H2O+Mg2+ is
29.

Iodine trichloride exists as a dimer I2Cl6, in solid state. Let, X = number of 3c−4e− bond, Y = maximum number of atoms in a plane and Z = number of 2c−2e− bond present in this molecule.Then find (X×YZ)

Answer» Iodine trichloride exists as a dimer I2Cl6, in solid state. Let, X = number of 3c4e bond, Y = maximum number of atoms in a plane and Z = number of 2c2e bond present in this molecule.Then find (X×YZ)

30.

The Ionisation potential of H is 13.6 eV. It is exposed to electromagnetic waves of 1030 oA and excites the electron to a certain energy level.Then the number of possible transitions from the excited state to the ground state is (Given RH = 109678 cm−1):

Answer» The Ionisation potential of H is 13.6 eV. It is exposed to electromagnetic waves of 1030 oA and excites the electron to a certain energy level.Then the number of possible transitions from the excited state to the ground state is (Given RH = 109678 cm1):
31.

I didn't understand the two ways of balancing redox reaction. Please help me understanding it more easily.

Answer» I didn't understand the two ways of balancing redox reaction. Please help me understanding it more easily.
32.

Which group will show more -I effect ... -COOH or COOR.......

Answer»

Which group will show more -I effect ...

-COOH or COOR.......

33.

Which of the following has the least stable enol form?

Answer»

Which of the following has the least stable enol form?

34.

When Oxygen is passed through a solution of Na2SO3 we get

Answer»

When Oxygen is passed through a solution of Na2SO3 we get

35.

The polarising ability of which one of the following is the highest 1 small highly+Ve ion 2 large +Ve ion 3 small highly -Ve ion 4 large -Ve ion

Answer» The polarising ability of which one of the following is the highest
1 small highly+Ve ion
2 large +Ve ion
3 small highly -Ve ion
4 large -Ve ion
36.

The spark-discharge apparatus to test chemical evolution of life was designed by:

Answer»

The spark-discharge apparatus to test chemical evolution of life was designed by:


37.

The mass of radium 226 having an activity of 1 curie is(T of radium 226 is 6000Y)

Answer»

The mass of radium 226 having an activity of 1 curie is(T of radium 226 is 6000Y)

38.

A→A+e, E1 and A+→A2++e, E2. 1. The energy required to pull out the two electrons are E1 and E2 respectively. The correct relationship between two energy would be

Answer»

AA+e, E1 and A+A2++e, E2.
1. The energy required to pull out the two electrons are E1 and E2 respectively. The correct relationship between two energy would be


39.

A Chemical reaction occurs in three paths having rate constants k1,k2&k3 respectively. If Ea1,Ea2 and Ea3 are 4, 5 & 8kJ respectively and overall rate constant k=k1k3k2.AssumingAav=A1A3A2 the overall energy of activation in kJ is ___.

Answer» A Chemical reaction occurs in three paths having rate constants k1,k2&k3 respectively. If Ea1,Ea2 and Ea3 are 4, 5 & 8kJ respectively and overall rate constant k=k1k3k2.AssumingAav=A1A3A2 the overall energy of activation in kJ is ___.
40.

Which of the following is not formed by the reaction of Cl2 on CH4 in sunlight

Answer»

Which of the following is not formed by the reaction of Cl2 on CH4 in sunlight


41.

The ‘d’- orbital involved in the hybridization in PCl5 molecule is

Answer» The ‘d’- orbital involved in the hybridization in PCl5 molecule is
42.

What is the boiling point of 1molal potassium iodide solution assuming it to be 100% dissociated? For water Kb= 0. 52K kg mol-1

Answer»

What is the boiling point of 1molal potassium iodide solution assuming it to be 100% dissociated?
For water Kb= 0. 52K kg mol-1


43.

The spontaneity means, having the potential to proceed without the assistance of external agency. The processes which occur spontaneously are (a) flow of heat from colder to warmer body (b) gas in a container contracting into one corner (c) gas expanding to fill the available volume (d) burning carbon in oxygen to give carbon dioxide

Answer»

The spontaneity means, having the potential to proceed without the assistance of external agency. The processes which occur spontaneously are
(a) flow of heat from colder to warmer body
(b) gas in a container contracting into one corner
(c) gas expanding to fill the available volume
(d) burning carbon in oxygen to give carbon dioxide

44.

Which of the following isomerism is not shown by alkynes?

Answer»

Which of the following isomerism is not shown by alkynes?


45.

[IIT 1983]

Answer»


[IIT 1983]


46.

A statement which is not a part of Dalton's atomic theory is:

Answer»

A statement which is not a part of Dalton's atomic theory is:


47.

An alkene given two moles of HCHO, one mole of CO2 and one mole of CH3COCHO on ozonolysis. What is its structure

Answer»

An alkene given two moles of HCHO, one mole of CO2 and one mole of CH3COCHO on ozonolysis. What is its structure

48.

In the following questions two Statement-1 (Assertion) and Statement-2 (Reason) are provided. Each questions has 4 choices (a), (b), (c) and (d) for its answer, out of which ONLY ONE is correct. Mark your responses from the following options: Statement- 1: 1-Butene on reaction with HBr in the presence of a peroxide produces 1-bromobutane. Statement- 2: It involves the formation of a primary radical.

Answer»

In the following questions two Statement-1 (Assertion) and Statement-2 (Reason) are provided. Each questions has 4 choices (a), (b), (c) and (d) for its answer, out of which ONLY ONE is correct. Mark your responses from the following options:
Statement- 1: 1-Butene on reaction with HBr in the presence of a peroxide produces 1-bromobutane.
Statement- 2: It involves the formation of a primary radical.


49.

Let the mass of a metal (hypothetical) in its oxide is 75% of the mass of the whole compound. Calculate its equivalent mass.

Answer»

Let the mass of a metal (hypothetical) in its oxide is 75% of the mass of the whole compound. Calculate its equivalent mass.

50.

(i) Write Lewis structure of the following compound and show formal charge on each atom. HNO3 (ii) Write Lewis structure of the following compound and show formal charge on each atom. NO2 (iii) Write Lewis structure of the following compound and show formal charge on each atom. H2SO4

Answer»

(i)

Write Lewis structure of the following compound and show formal charge on each atom.

HNO3

(ii)

Write Lewis structure of the following compound and show formal charge on each atom.

NO2

(iii)

Write Lewis structure of the following compound and show formal charge on each atom.

H2SO4