Explore topic-wise InterviewSolutions in Current Affairs.

reckon up; look over.

Man, the worst predator, kills for no reason. Man has to protect forests and live in harmony with nature. Instead man is callous. He kills elephants for their tusks, Rhinoceros for their horn, and polar bears for their fur. Huge trees, in Rainforests, which have been protecting lives of many species and insects, are being felled for timber and industrialization. Due to the increase in the denudation of forests, global warming has increased. Water levels in the ocean is increasing.

Heat waves are threatening the lives of people. Polar ice is melting. Scientists fear that if this persists, there will be hostility caused by watersharing. Like Karnataka and Tamil Nadu, there will be political unrest and community conflicts demanding share in drinking water and water for irrigation purposes. In South Africa, zero water day is fast approaching. The scarcity of portable water is going to be a huge humanitarian crisis. As we have failed to protect the national resources, carbon foot print is expanding to alarming levels.

Delhi experiences difficulty as planes struggle to land or take off dufe to thick smog in and around Delhi. As toxic waste is released by Sterlyte and other industries people in Thoothukudi are becoming victims of cancer and other lung related disorders. Atomic power plants also retain potential hazards like radio-activity. Thus humanity’s failure to live in harmony with nature is threatening to wipe out human race.

to get rid of; straight out

hard put to it; rake in

turn their backs; got out of the way.

A democratic revolution is a political science term denoting a revolution in which a democracy is instituted, replacing a previous non-democratic government, or in which revolutionary change is brought about through democratic means.

Newton's second law, which states that the force F acting on a body is equal to the mass m of the body multiplied by the acceleration a of its centre of mass, F = ma, is the basic equation of motion in classical mechanics.

L = μ₀ μ_r AN²/l. 

Here N = 400 ; A = 2 × 2 = 4 cm² = 4 × 10⁻⁴ m² ; l = 0.3π m ; μ_r = 800 

∴ L = 4π × 10⁻⁷ × 800 × 4 × 10⁻⁴ (400)²/0.3π = 68.3 mH 

Note. The cross-section of the wire is not relevant to the given question. 

Third Method for L 

It will be  (i) above that L = NΦ/I

∴ N Φ = LI or −NΦ = −L I

Differentiating both sides, we get - d/dt(NΦ) = - L x dI/dt (assuming L to be constant) ;

- N x dΦ/dt = - L x dI/dt

- N x dΦ/dt = self-induced e.m.f.

∴ e_L = - L x dI/dt

If dI/dt = 1 ampere/second and e_L = 1 volt, then L = 1 H

I think your question is not complete.

Also, if you are asking about the second step in the photolytic reaction of chlorine with methane, the product will be CH₂Cl₂ in the presence of sunlight but this is not the reaction you have written.
However, If you are asking about CH₂Cl₂ which is dichloro-methane (DCM). It is a non-flammable, volatile chemical that is widely used as an organic solvent. Also known as methylene chloride, it has many industrial applications because of its high volatility and ability to dissolve compounds. it is also non-nucleophilic, non-electrophilic and generally does not take part in many reactions. 

Hint— (i) Fossil fuels are depleting, Population is increasing, Quality of life is to be improved etc.
(ii) Tidal/wave/OTEC

Factors leading to human development are :

(i) Education: Kerala is able to record the highest value of HDI largely due to its impressive performance in achieving near hundred per cent literacy in 2001. In a different scenario, the states like Bihar, Madhya Pradesh, Odisha, Assam and Uttar Pradesh have very low literacy. For example, total literacy rate for Bihar was as low as 60.32 per cent during the same year. States showing higher total literacy rates have less gaps between the male and female literacy rates. 

(ii) Economic development: Apart from the educational attainment, the level of economic development also has a significant impact on HDI. Economically developed states like Maharashtra, Tamil Nadu and Punjab and Haryana have higher value of HDI as compared to states like Assam, Bihar, Madhya Pradesh, etc. 

(iii) Regional distortions and social disparities : These aspects which developed during the colonial period continue to act as an important factor.

Conventional sources of energy : Coal, petroleum, natural gas, fissionable materials like uranium. 

Non-conventional sources of energy : Wind, Hydro Power, the Sun, Ocean Tidals Energy, Interior of the Earth, Biogas, Plants, Vegetable waste etc. 

Biomass : Slurry of animal dung or other types of bio-waste and water is made in the mixing tank and then fed into the digester. The digester is usually a closed underground tank. In digester, the action of micro-organisms decomposes the complex compounds of the bio-mass in the slurry. Anaerobic micro-organisms, the presence of water, degrade the bio-mass in the digester. As anaerobic micro-organisms do not require oxygen, the digester is designed like a sealed chamber. The complete degradation process takes few days, during which bio gases are produced. Now the bio gas can be supplied to consumers through pipes. Periodically the slurry, that is left behind in the digester, is removed and it serves as an excellent manure.

Hint— Conventional: Fossil fuels, water, wind, Biomass etc. Non Conventional: Nuclear, Solar, Energy from ocean, Geothermal etc. Explain the use of one of Non conventional source of energy.

(2c,2e) and (3c,2e) bonds

Solution :

Silver forms cubic close packing (ccp) , therefore the number of silver atoms per unit cell z=4

Molar mass of silver M=107.9 gmol⁻¹ = 107.9×10⁻³kgmol⁻¹

Edge length of unit cell a=408.6 pm = 408.6×10⁻¹²

Density d=(z.M)/(a³.N_A)

d=4×(107.9×10⁻³kgmol⁻¹)/(408.6×10⁻¹²m)³(6.022×10²³mol⁻¹)

=10.5×10³kgm⁻³

d=10.5gcm⁻³

Correct option  (b) 10 cm

Explanation:

Given : Power of first lens (P₁) = + 12 D and pour er of second lens (P₂) = -2D.

power of the combination (P) = P₁ + P₂ = 12 + (-2) = + 10 D.

:. Equivalent focal length (F) = 1/P = 1/10 m = 10 cm.

The correct option (4) > 50 ppm of nitrate

Explanation:

Drinking water containing > 50 ppm of nitrate causes methemoglobinemia.

(2) 

packing fraction of cubic close packing and body centred packing are 0.74 and 0.68 respectively.

a. Mulberry silk

Mulberry silk is not wild silk.

The size of the card in one card system, being used in recording of periodicals, is 6” ×4”. 

Correct option: (d) Acquisition by exchange

Correct answer is a) Single 

S L S H was first published in the year 1923. 

Correct option is (a) 1923.

SLSH was first published in the year 1923.

Mass, spring and dashpot 8 are the basic element

Correct answer is (C) Vulcanisation

Correct answer is (C) High density polythene

Moment of inertia J, dashpot with rotational frictional coefficient B and torsion spring with stiffness K

The model of mechanical translational systems can obtain by using three basic elements mass, spring and dashpot. When a force is applied to a translational mechanical system, it is opposed by opposing forces due to mass, friction and elasticity of the system. The force acting on a mechanical body is governed by Newton‘s second law of motion. For translational systems it states that the sum of forces acting on a body is zero.

(b) it is very strongly electronegative

d). CH₃I has highest boiling point.