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.

Directions : Each of these questions contains two statements Assertion and Reason. Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and (d) given below.(a) Assertion is correct, reason is correct; reason is a correct explanation for assertion.(b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion(c) Assertion is correct, reason is incorrect(d) Assertion is incorrect, reason is correct.Assertion : The resolving power of a telescope is more if the diameter of the objective lens is more.Reason : Objective lens of large diameter collects more light.

Answer» (a) RP ∝ diameter of objective.
2.

Example of schedule G drug is ?

Answer»

Answer: Paracetmol

3.

The correct image formation by a concave mirror is depicted in

Answer» (d) The ray parallel to principle axis after reflection through mirror passes through the focus and the ray passing through the centre of curvature set retr its path.
4.

A long cylindrical tank of cross-section area `0.5m^(2)` is filled with water. It has an opening at a height 50 cm from the bottom, having area of cross-section `1xx10^(-4)m^(2)`. A movable piston of cross-section area almost equal to `0.5m^(2)` is fitted on the top of the tank such that it can slide in the tank freely. A load of 20 kg is applied on the top of the water by piston, as shown in the figure. Find the speed of the water jet with which it hits the surface when piston is 1m above the bottom. (Ignore the mass of the piston). If this speed is `((18)/(x))` m/s, find the value of x.

Answer» Correct Answer - 4
When B is considered moving leftwards, tension comes less than kinetic friction. B does not move `a_(A)=2a_(c )`
`f_(k)" on A = "mu(5gcos37^(@))=20N`
`T+30-20=5(a_(A))`
`25-2T=(2.5)a_(c )`
Solving `a_(A)=4m//s^(2)`
5.

A block of mass `m` collides with another block of mass `3m` completely inelastically as shown in figure. What is the maximum value of `v (` in `m//s)` for which the block `B` does not move. Assume that initially spring is in natural length and blocks `A` and `B` are at rest. `(K//m=100 S.I. `unit `)`

Answer» Correct Answer - 2
Velocity of `(A+C)`,
`V_(1)=(V)/(1+3)=(V)/(4)`
If `B ` does not move, maximum compression`X` in the spring is
`(1)/(2) KX^(2)=(1)/(2)xx4m((v)/(4))^(2)`
`:. X=((4m)/(K)).(v)/(4)`
`:. KX=mu mg `
`rArr 100. sqrt((4)/(100)). (v)/(4)=1xx10`
`rArr v=2m//s` Ans. 2
6.

The potential energy of a particle executing `SHM` change from maximum to minimum in `5 s`. Then the time period of `SHM` is:A. `5s`B. `10s`C. `15s`D. `20s`

Answer» Correct Answer - D
`P.E` is maximum at exteement position and minimum at mean position.
Time to go from extreme position to mean position is `,t=(T)/(4),` where `T` is time period of `SHM 5s=(T)/(4)`
`rArr T=20s`.
7.

What is magnetic susceptibility?

Answer»

The ratio of magnetization to magnetic intensity is called magnetic susceptibility.

X = \(\frac{M}{H}\)

8.

Write the expression for force acting on a moving charge in a magnetic field.

Answer»

F = q(\(\vec V \times \vec B\)) or F = gVBsinθ.

9.

Define electrical resistivity of material of a conductor.

Answer»

Electrical resistivity of material of a conductor is the resistance of the conductor per unit length and per unit area of given material of conductor.

10.

State Coulomb’s Law.

Answer»

Coulomb’s law states that force of attraction or repulsion between two point charges is directly proportional to product of two charges and inversely proportional to square of distance between them.

11.

`4 gm` of steam at `100^(@)C` is added to `20 gm` of water at `46^(@)C` in a container of negligible mass. Assuming no heat is lost to surrounding, the mass of water in container at thermal equilibrium is. Latent heat of vaporisation `= 540 cal//gm`. Specific heat of water `=1 cal//gm-^(@)C`.A. 18 gmB. 20 gmC. 22 gmD. 24 gm

Answer» Correct Answer - C
Heat released by steam inconversion to water at `100^(@)C` is `Q_(1)=mL=4xx540=2160 cal`
Heat required to raise temperature of water from `46^(@)C` to `100^(@)C` is `Q_(2)=mS Deltatheta=20xx1xx54=1080 J`
`Q_(1) gt Q_(2)` and `(Q_(1))/(Q_(2))=2`
Hence all steam is not converted to water only half steam shall be converted to water
`:.` final mass of water =20+2=22 gm
12.

Read each statement below carefully and state with reasons, if it is true or false:1. The magnitude of a vector is always a scalar.2. Each component of a vector is always a scalar.3. The total path length is always equal to the magnitude of the displacement vector of a particle.4. The average speed of a particle (defined as total path length divided by the time taken to cover the path) is either greater or equal to the magnitude of average velocity of the particle over the same interval of time.5. Three vectors not lying in a plane can never add up to give a null vector.

Answer»
  1. True
  2. False
  3. False
  4. True
  5. True.

In order to give a null vector, the third vector should have the same magnitude and opposite direction to the resultant of two vectors.

13.

Raju Pingua

Answer»

Ganesha Chaturthi, also known as Vinayaka Chaturthi or Vinayaka Chavithi is the Hindu festival that reveres god Ganesha. A ten-day festival, it starts on the fourth day of Hindu luni-solar calendar month Bhadrapada, which typically falls in the months of August or September of the Gregorian calendar.

14.

A man slides down an inclined plane and drops a bag from the position to the ground. If the velocities of man and bag on reaching the ground are VM and VB respectively.(1) νM > νB. (2) νM < νB. (3) νM = νB.(4) Depend on their mass.

Answer»

Answer is (3) νM = νB.

The velocity of an object is independent of its mass.

15.

If for a particle position x ∝ t2., then : (1) velocity is constant(2) acceleration is constant(3) acceleration is variable (4) none.

Answer»

Answer is (2) acceleration is constant

x ∝ t2 ⇒ x = kt2

⇒ ν = dx/dt = 2kt and a = dν/dt = 2k = const. 

16.

A ship of mass 3 x 107 kg initially at rest is pulled by a force of 5 x 104 N through a distance of 3 m. Assuming that the resistance due to water is negligible. What will be the speed of the ship. (1) 0.1 m/sec. (2) 1.5 m/sec. (3) 5 m/sec. (4) 60 m/sec.

Answer»

Answer is (1) 0.1 m/sec.

F = ma

5 x 104 = 3 x 107 x a. 

a = (5/3) x 10-3 m/s2; s = 3m, u = 0

ν2 = u2 + 2as = 2 x (5/3) x 10-3 x 3

⇒ ν2 = 10-2 ⇒ ν = 0.1 m/s. 

17.

2.2 g of nitrous oxide (N2O) gas is cooled at a constant pressure of 1 atm from 310 K to 270 K causing the compression of the gas from 217.1 mL to 167.75 mL. The change in internal energy of the process, ΔU is

Answer»

Molecular weight of nitrous oxide (N2O) = 44 g/mol

Number of moles of N2O = \(\frac{2.2}{44} = 0.05 mol\) 

Specific heat capacity of N2O = 880 J/g.K

∴ Heat release on cooling from 310K to 270 K 

q = -2.2 x 880 x 40 K

q = -77.44 KJ   

Negative sign indicates heat released.

∴ Work done by surrounding on system to compares the gas from 217.1 ml to 167.75 ml at constant pressure.

It means work done by surrounding is irreversible.

\(\therefore W = -P \times \triangle V\)

\(= - 1.01 \times 10^5 \times (167.75 - 217.1 ml)\)

\(= 1.01 \times 10^5 \times 0.049 J\)

\(W = 4.95 kJ\)

Using 1st Law of thermodynamics

\(\triangle U = q + W\)

\(\triangle U = -77 .44 KJ + 4.95KJ\)

\(\triangle U = -72.49 KJ\)

Hence change in internal energy \(\triangle U = -72.49 KJ\)

18.

Equation of tangent of the circle x*2+y*2-8x-2y+12=0 at the points whose ordinates are 1

Answer» Kindly mention the absicsa too

Let the point on the circle be (x,1)Where the tangent is also passing from the same point.

x​​​​​​2​​​​​+(1)2-8x-2(1)+12=0

x​​​​​​2​​​​​-8x+11=0

Where x=-b+-√b2-4ac /2

x=4+-√5         

The equation of the tangents is x=4+√5 and x=4-√5

19.

A car can pull a trailer of twice its mass up a certain slope at a maximum speed `v=1m//s`. Without the trailer the maximum speed of the car up the same slope is `2v`. The resistance to the motion is proportinal to mass and square of speed. If the car (without trailer) starts to move down the same slope, with its engine shut off, eventually it will acquire a constant speed `v_(t)`, then find `v_(t)^(2)` (in `m^(2)//s^(2)`)

Answer» Correct Answer - 5
For car `+` trailer system
`P_("max")=(3mgsintheta+3kmv^(2))v`
For car only
`P_("max")=(mgsintheta+4kmv^(2))2v`
`:.k=(gsintheta)/(5v^(2))`
For down the incline `kmv_(t)^(2)=mgsintheta`
`:.v_(t)^(2)=5v^(2)`
20.

IUPAC name of this compound is : (a) Trimethylheptane (b) 2 -Ethyl -3, 3- dimethyl heptane (c) 3, 4, 4 – Trimethyloctane (d) 2 – Butyl -2 -methyl – 3 – ethyl-butane.

Answer»

(c) 3, 4, 4 – Trimethyloctane

21.

A body is projected vertically upwards wth a velocity `u=5m//s`. After time `t` another body is projected vertically upward from the same point with a velocity `v=3m//s`. If they meet in minimum time duration measured from the projection of first body, then `t=k/g` sec find `k` (where `g` is gravitatio acceleration).

Answer» Correct Answer - 6
If they meet a height `h` after time `T` of the projection of the second.
Then `h=u(T)-1/2g(T)^(2)=v(T-t)-1/2 g (T-t)^(2)`…….(i)
`T=(5t^(2)+3t)/(10t-2)`
For minimum `T, (dT)/(dt)=0`
`50t^(2)-20t-6=0`
`impliest=0.6=6/g`
22.

Which one of the following is an example for free radical initiators? (a) Benzoyl peroxide (b) Benzyl alcohol (c) Benzyl acetate (d) Benzaldehyde.

Answer»

(a) Benzoyl peroxide

23.

Some meta-directing substituents in aromatic substitution are given. Which one is most – deactivating?(a) – COOH (b) – NO2 (C) – C ≡ N (d) – SO3H

Answer»

Correct answer is (b) – NO2

24.

Consider the following statements.(I) SN2 reaction is a bimolecular nucleophilic first order reaction.(II) SN2 reaction take place in one step. (III) SN2 reaction involves the formation of a carbocation. Which of the above statements is/are not correct?(a) (II) (b) (I) only (c) (I) & (III) (d) (III)

Answer»

(c) (I) & (III)

25.

The questions given below consists of an assertion and the reason. Choose the correct option out of the choices given below each question. Assertion (A): If BOD level of water in a reservoir is more than 5 ppm it is highly polluted. Reason(R): High biological oxygen demand means high activity of bacteria in water. (a) Both (A) and R are correct and (R) is the correct explanation of (A) (b) Both (A) and R are correct and (R) is not the correct explanation of (A) (c) Both (A) and R are not correct (d) (A) is correct but( R) is not correct

Answer»

(d) (A) is correct but( R) is not correct

26.

Consider the following equation in x and y: `(x-2y-1)^2 + (4x+3y-4)^2 + (x-2y-1)(4x+3y-4) =0` How many solutions to `(x, y)` with `x, y` real, does the equation haveA. zeroB. exactly oneC. exactly twoD. more than two

Answer» Correct Answer - B
For solution `x-2y-1=0` and `4x+3y-4=0`
27.

The range of the function, `f(x)= (1+sec^-1x) (1 + cos^-1 x)` isA. `(-oo,oo)`B. `(-oo,0]uu[4,oo)`C. `{1,(1+pi)(2)}`D. `{0,(1+pi^(2))}`

Answer» Correct Answer - C
Domain of `f(x)` is `{1,-1}` so range will be `f(1)` & `f(-1)`
28.

What is the actual configuration of copper (Z = 29)? Explain about its stability?

Answer»

Copper (Z = 29) 

Expected configuration : 1s2 2s2 2p6 3s2 3p6 3d9 4s2

Actual configuration : 1s2 2s2 2p6 3s2 3p6 3d10 4s1 The reason is that fully filled orbitals have been found to have extra stability.

Copper has the electronic configuration [Ar] 3d10 4s1 and not [Ar] 3d9 4s2 due the symmetrical distribution and exchange energies of d electrons.

Symmetry leads to stability. The full filled configuration have symmetrical distribution of electrons and hence they are more stable than unsymmetrical configuration.

29.

What is screening effect?

Answer»

Screening effect: 

The repulsive force between inner shell electrons and the valence electrons leads to a decrease in the electrostatic attractive forces acting on the valence electrons by the nucleus. Thus the inner shell elections act as a shield between the nucleus and the valence electrons. This effect is called shielding effect (or) screening effect.

30.

Ice is less dense than water at 0°C. Justify this statement?

Answer»

In ice, each oxygen atom is surrounded tetrahedrally by through hydrogen bonds to four water molecules. That is, the presence of two hydrogen atoms and two lone electron pairs (on oxygen) in each water molecule results in a threedimensional structure. The arrangements creates an open structure, which in turn accounts for the fact that ice is less dense than water at 0°C.

31.

Calculate the standard free energy change for the reaction,4NH3 (g) + 5O2 (g) 4NO (g) + 6H2O (l)Given that the standard free energies of formation (ΔfG°) for NH3 (g), NO (g) and H2O (l) are – 16.8, + 86.7 and – 237.2 kJ mol–1 respectively. Predict the feasibility of the above reaction at the standard state.

Answer»

Here, we are given

Δf G° (NH3 ) = – 16.8 kJ mol–1 

Δf G° (NO) = + 86.7 kJ mol–1 

Δf G° (H2O) = – 237.2 kJ mol–1 

∴ Δf G° = ∑f G° (Products) ∑ Δf G° (Reactants) 

=[14 × Δf G° (NO) + 6 × Δf G°(H2O)] – [4 × Δf G° (NH3 ) + 5 × Δf G° (O2 )]

= [4 × (86.7) + 6 × (–237.2)] – [4 × (– 16.8) + 5 × 0] = – 1009.2 kJ

Since Δf G° is negative, the process is feasible.

32.

succinylcholine is an example of

Answer»

Succinylcholine is a skeletal muscle relaxant for intravenous (IV) administration indicated as an adjunct to general anesthesia, to facilitate tracheal intubation, and to provide skeletal muscle relaxation during surgery or mechanical ventilation.

33.

The electronic configuration of some neutral atoms are given below (1) 1s2 2s1   (2)1s2 2s2 2p3   (3)1s22s22p5    (4)1s22s22p63s1In which of these configuration would you expect to have highest :-(a) IE1      (b) IE2(A) 3,1.      (B) 2,1.     (C) 3,2.      (D) 2,4

Answer»

Since for electronic configuration or we can say to fill the electrons in different shells its necessary to fill a shell then move to next shell ,without doing so we can't jump to other .But in case of copper and chromium this kind of electronic configuration is followed as for stability either the orbital should be half filled or full filled.   

Energy gap between the 2s and 2 p is large so when we are going to fill the electrons , the 2s will be filled prior to the 2p. The electron will enter only after the completion of 2s. 

34.

Define (i) work function (ii) Threshold frequency.

Answer» (i) Work function is the minimum energy of light radiations required to remove an electron from the metal surface. (ii) Frequency related to work function is threshold frequency.
35.

The current carrying capacity of the fuse material depends on (A) cross-sectional area (B) length (C) material (D) all of the above.

Answer»

(D) all of the above.

36.

Half-filled and full filled orbitals have extra stability. Why?

Answer» Due to exchange energy. There is extra stability associated with electronic configurations.
37.

What are isoelectronic series?

Answer» Species having same no of electrons.
38.

The uncertainty in the position of a moving bullet of mass 10g is 10-5m.Calculate the uncertainty in the velocity.

Answer»

According to uncertainty principle Δx.Δmv=ℎ/4π

⇒Δv=ℎ/4πmΔx=6.626×10−34/4×3.14×10−2×10−5=5.27×10−28 m/s

39.

To draw a maximum current from a combination of cells, how should the cells be grouped? (a) Parallel(b) Series(c) Mixed grouping(d) Depends upon the relative values of internal and external resistances

Answer» Correct option(d)
40.

Consider a current carrying wire (current I) in the shape of a circle. Note that as the current progresses along the wire, the direction of `vecJ` (current density) changes in an exact manner, while the current I remains unaffected. The agent that is essentially responsible for isA. Source of emf.B. electric field produced by charges accumulated on the surface of wire.C. the charges just behind a given segment of wire which push them just the right way by repulsionD. the charges ahead

Answer» Correct Answer - A
41.

What are black holes?

Answer»

Black holes are end stage of stars Which are highly dense massive object. Its mass ranges from 20 times mass of the sun to 1 million times mass of the sun. It has very strong gravitational force such that no particle or even light can escape from it. The existence of black holes is studied when the stars orbiting the black hole behave differently from the other starts. Every galaxy has black hole at its center. Sagittarius A* is the black hole at the center of the Milky Way galaxy.

42.

What is shunt ? Write its two uses.

Answer»

A resistor having a very low value of resistance connected in parallel with other resistor is caused shunt.

Two uses of shunt:

(i) The range of ammeter reading can be extended by connecting a shunt resistance to it.

(ii) The shunt is used in the galvanometer for measuring the large current.

43.

Write two uses of shunt.

Answer»

(i) It is used in galvanometre.

(ii) It is used for provided high electricity.

44.

What is the function of second plate in a parallel plate capacitor?

Answer»

When a voltage is applied to these plates an electrical current flows charging up one plate with a positive charge with respect to the supply voltage and the other plate with an equal opposite- vecharge. Then, a capacitor has the ability of being able to store and electrical charge.

45.

What is the full form of MBBS ?

Answer»

MBBS - Bachelor of Medicine, Bachelor of Surgery

MBBS is usually referred to by the courtesy title of "Doctor" and use the prefix "Dr" in front of Name. In many countries, the degree is awarded after an undergraduate course lasting five or six years.

        The degree is currently awarded to Doctors in Medical Institutions of Australia, China, Hong Kong, India, Nepal, New Zealand, Singapore, South Africa, Sri Lanka, United Kingdom and Many more.

46.

What is the Full Form of ICU ?

Answer»

ICU - Intensive Care Unit

Intensive Care Units cater to patients with life-threatening injuries and illnesses, most of which need constant, close monitoring by specialized trained doctors and nurses in Hospital. Apart from doctors and nurses, an ICU staff of Hospital may consists of respiratory therapists, physical therapists and pharmacists.

Injuries and Illnesses that may require special and expensive care of an
ICU :-

  • Problems with the heart attack, low blood pressure and blood vessels
  • Difficulty with breathing due to Asthma or severe pneumonia
  • Serious Accident cases where patient needs immediate attention
  • Patients undergoing major surgery, who need special monitoring after the operation
  • Patients who are in a coma or have loss of consciousness may also require ICU
47.

What is the Full Form of DNA ?

Answer»

DNA - Deoxyribo Nucleic Acid

Deoxyribonucleic acid is the hereditary material in all known living organisms containing the genetic instructions used in their development and functioning. The DNA segments carrying this genetic information are called genes. It is found inside a special area of the cell called the nucleus.

The code of DNA is made up of four chemical bases name:-

  • Adenine (A)
  • Guanine (G)
  • Cytosine (C)
  • Thymine (T)

DNA bases pair up with each other, ie. A with T and C with G, to form units called base pairs.

The strands of the DNA make a copy of each and becomes two stands. This is the reason why humans give birth to humans, eagle to eagle, horse to horse and so on for every type of living creature.

48.

List a few diseases in which bone marrow examination is indicated.

Answer»

Thrombocytopenia, 

Leukumeia,

Refractory 

anaemia, 

Paraproteinemias

49.

What is the full form of DM ?

Answer»

DM - Doctorate of Medicine

Doctorate of Medicine is a 3 years Post Graduate Super Specialty Degree, awarded for a course in the field of Medicine. The number of students to be admitted in Doctorate of Medicine is 1 student per year per recognized Post Graduate teacher in a department having a minimum of three faculty members (one Professor, one Associate Professor and one Assistant Professor/Lecturer).

 DM - District Magistrate

The Collector also is known as the District Magistrate, responsible for the maintenance of law and order in his district.

50.

Write down the life span and function of RBC.

Answer»

Life Span of RBCs is 120 days.

Function of RBCs is to carry oxygen and carbon di-oxide.