Explore topic-wise InterviewSolutions in Current Affairs.

Correct option  (c) P<R<Q

Explanation: 

P and Q belong to same group and Q succeeds P i.e., Q is bigger in size than P. Now, Q and R belong to same period and R succeeds Q. Therefore, R will be smaller in size than Q but will be bigger in size than P.

Correct option  (B) (ii), (iii) and (iv) only 

Explanation: 

Hydroxide of group 2 element, KOH and lime water i.e., Ca(OH)₂ are basic in nature which turn China rose indicator green. Oxide of element belonging to group 16 and period 3 i.e., SO₂ and oxide of element having electronic configuration 2, 4 i.e., CO₂ are acidic in nature which turn China rose indicator magenta.

Correct option  (D) Bromine is less than chlorine.

Explanation: 

Electron affinity increases across a period from left to right due to decrease in atomic size. Thus,electron affinity of C is less than O and electron affinity of O is less than that of F. 

Electron affinity decreases down a group due to increase in atomic size. Thus, electron affinity of I is less than Br and that of Br is less than Cl.

(C) (i) - Proton number, (ii) - No. of electron shells, (iii) - No. of valence electrons, (iv) - Atomic radius, (v) - Metallic character 

Correct option  (B) (i) and (ii) only 

Explanation: 

Soaps and detergents are water soluble. Soaps are biodegradable while, detergents are not.

A carboxylic acid reacts with sodium hydrogencarbonate to give brisk effervescence of carbon dioxide gas but an alcohol does not react with sodium hydrogencarbonate.

Correct option  (A) People sleeping in closed room with coal fire burning inside, can die due to CO₂ poisoning. 

Explanation: 

lncomplete burning of coal in a closed room produces carbon monoxide. Carbon monoxide combines with haemoglobin more efficiently than oxygen, causing deficiency of oxygen in tissues and cells which can lead to death.

The Correct option is : (D)

Correct option  (B)

Explanation: 

 A homologous series is a group of organic compounds having same functional group thus, they show similar chemical properties. Successive members of a homologous series differ by -CH₂ group and show gradual change in their physical properties with increase in molecular mass.

It is defined as the ratio of normal stress to longitudinal strain within limit of proportionality.

Y = \(\frac{Normal\, stress}{Longitudinal\, strain}\)

As F = rate change of momentum 

F = 1 kg-m/s² = 1N

When a large force works on a body for very small time interval, it is called impulsive force. 

An impulsive force does not remain constant, but changes first from zero to maximum and then from maximum to zero. In such case we measure the total effect of force.

• Impulse of a force is a measure of total effect of force.
• Impulse is a vector quantity and its direction is same as that of force

Dimension : [MLT^–1]

Units : Newton second or Kg-ms^–1 (S. I.) and Dyne second or gm cm s^–1 (C.G. S.)

Factors are

(a) Hammering and rolling: This result is in an increase in the elasticity of material.

(b) Annealing: Results in decrease in the elasticity of material.

(c) Temperature: Elasticity decrease with rise in temperature but the elasticity of invar steel (alloy) does not change with change in temperature.

(d) Impurities: This type of effect depends upon the nature of impurities.

If a body regains its original shape and size after removal of the deforming force, it is called an elastic body and the property is called elasticity.

Since liquid and gases do not possess any length or shape or their own but possess only volume, hence bulk modulus of elasticity (B) is involved in case (a) and (b). Because by pulling the wire at its ends the length of the wire increases (i.e., there occurs a change in the length of the wire), hence young's modulus of elasticity is involved in case (c). In case (d), the modulus of rigidity is involved as there occurs a change in the shape of the book.

Young's modulus of steel is greater than that of copper. Hence, in order to produce same extension, large force will have to be applied on the steel spring that the copper spring.

Obviously, more work will be done on the steel spring.

Ellipses that are created at some angular distance from the centre of the earth and are parallel to one another are called parallels of latitudes.

i. globe

ii. centre

iii. equator

iv. equator

v. 90°

Graticules help us to determine the locations on the earth. In the modern age, Geographical Information Systems, Global Positioning System, Google Maps, Wikimapia, Bhuvan of ISRO also make use of graticules.

There are 90 parallels in the northern hemisphere.

The countries through which the equator passes are Ecuador, Colombia, Brazil, Sao tome and Principe, Gabon, Republic of the Congo, Democratic Republic of the Congo, Uganda, Kenya, Somalia, Maldives, Indonesia and Kiribati.

0° Prime Meridian and 180° meridian

1 – c 

2 – b 

3 – d 

4 – a 

5 – e

• The equator is considered as 0° parallel.
• It is the largest parallel and great circle.
• It bisects the earth into two equal hemispheres viz, the northern and southern hemisphere.

The Prime Meridian divides the earth in the eastern and western hemisphere.

On the globe and also on the earth, at the north and south ends of the earth’s axis, Poles appear as points. These are called the North Pole and the South Pole respectively.

Indian Regional Navigation Satellite System

Latitude and longitude is used to determine the location on the earth.

Global Positioning System

Geographical Information System

Cl⁺ < Cl < Cl^-

Correct option is (c) Emphasises short terms goals.

Correct option is (b) Program.

Correct option is (b) Power

Correct option is (a) Productivity

Correct option is (a) Quality of work life

(a) Entrepreneurship

(b) Donald B. Trow

Donald B. Trow.

Ribson  said

If A679B is divisible by 72 then it should be divisible by 8 and 9.

[ ∵ 8, 9 are the factors of 72]

A679B is divisible by 9 then

A + 6 + 7 + 9 + B = A + B + 22 = 27 (9 x 3)

=A + B = 5………. (1)

A679B → 79B/8 [From B (2,4,6,8) we take B = 2]

= 792/8 (R = 0)

∴ B = 2

From (1) ⇒ A + 2 = 5

∴ A = 3, B = 2

Operation Barga depended heavily on collective action by the share croppers and Panchayati Raj Institutions thus avoiding bureaucratic delays and domination of the landowning classes.

The UPA was the first coalition to be re-elected.

Jyoti Basu of CPM led the Left Front Government in West Bengal in 1977.

In April 1986, an assembly at the Akal Takht, made a declaration of an independent state of Khalistan.

Land Reforms in China: 

The major steps in land reforms were a class identification of all village inhabitants, followed by the confiscation and redistribution of landlord land and other properties. 

Land Reforms in Vietnam : 

A reduction of 25% in land rents, the cancellation of all secondary rents and the cancellation of all areas in rent owed by tenants before August, 1945.

Land Reforms in West Bengal: 

Operation Barga was introduced. West Bengal Government recorded the names of the sharecroppers and secured their rights. All the legal documents were issued and distributed on the spot immediately. As a result the sharecroppers felt secured. 

In all the three issues the governments created a security feeling in the winds of the tenants. They controlled the inhumane acts of the landlords.

The militants were also engaged in large scale kidnapping and extortion to raise funds for their work.

The Government used very harsh methods for the suppression of militancy in Punjab, many of which were seen as a violation of. Constitutional rights of citizens.

1. There were many lasting contributions of Rajiv Gandhi to the country. 

2. He was instrumental in initiating peace process in Assam, Punjab and even in Sri Lanka.

3. He was the best supporter of Panchayat Raj institutions. 

4. His government’s first budget moved towards more liberalised system. 

5. He invited telecom revolution in India. 

6. He believed poor are not successful in getting access to the fruits of development.