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General Science MCQ

General Science MCQ Practice

Practice General Science questions with instant scoring, correct answer highlighting, detailed solutions and first-click AI explanation caching for missing explanations.

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Q. 4340
👁 1 views
What is 'Greenhouse Gas Protocol'?
  • A It is an international accounting tool for government and business leaders to understand, quantify, and manage greenhouse gas emissions
  • B It is an initiative of the United Nations to offer financial incentives to developing countries to reduce greenhouse gas emissions and to adopt ecofriendly technologies
  • C t is an inter-governmental agreement ratified by all the member countries of the United Nations to reduce greenhouse gas emissions to specified levels by the year 2030
  • D It is one of the multi-lateral REDD+ initiatives hosted by the World Bank
Correct Option: A  [ It is an international accounting tool for government and business leaders to understand, quantify, and manage greenhouse gas emissions ] Stored explanation
Correct option: A
  • Why A is correct: The Greenhouse Gas Protocol is an international accounting tool that helps governments and businesses understand, quantify, and manage greenhouse gas emissions.
  • Key concept: GHG accounting using scopes (Scope 1, 2, 3) and emission factors: Emissions ≈ Activity × EmissionFactor.
  • Exam tip: Remember the three scopes; practice matching examples to each scope.
Q. 4339
👁 2 views
Which of the following elements does sugar contain?

(i) Carbon

(ii) Nitrogen

(iii) Hydrogen

(iv) Oxygen

Select the correct answer using the codes given below.
  • A (i), (iii) and (iv) only
  • B (i), (ii) and (iii) only
  • C (i) and (iii) only
  • D (i) and (iv) only
Correct Option: A  [ (i), (iii) and (iv) only ]
The general formula for many common sugars is Cn(H2O)n.
Simple sugars like glucose is C6H12O6.
Q. 4338
👁 2 views
Solutions are of many types. Consider the following types of solution with an example each:

(i) Gas in liquid - Vinegar

(ii) Solid in liquid - Brine

(iii) Solid in solid - Brass

(iv) Liquid in liquid - Coca-Cola

Select the correctly matched pairs using the codes given below.
  • A (i) and (ii) only
  • B (ii) and (iii) only
  • C (i), (iii) and (iv) only
  • D (ii), (iii) and (iv) only
Correct Option: B  [ (ii) and (iii) only ] Stored explanation
Correct option: B
  • Explanation: A solution is a homogeneous mixture of solute in a solvent.
    Solid in liquid (brine: salt in water) is valid;
    Solid in solid (brass: alloy of copper and zinc) is also a solid solution.
  • Why others are wrong:
    • (i) Gas in liquid – vinegar: vinegar is a solution of acetic acid in water (not gas in liquid).
    • (iv) Liquid in liquid – Coca-Cola: Coca-Cola is a liquid solution, not a separate liquid dispersed in another; CO2 is dissolved gas in liquid, not a separate liquid phase.

Exam tip: Identify the phase of solute/solvent; only gas-in-liquid, solid-in-liquid, or solid-in-solid qualify as true “types of solutions.”

Q. 4337
👁 1 views
Consider the following pairs of scientists and Discoveries :

  discoveries  :  Scientists

(i) Copernicus : Law of gravitation

(ii) Kepler : Laws of planetary motion

(iii) Galileo : Moons of Jupiter

(iv) Newton : Heliocentric theory

Select the correctly matched pairs using the codes given below.
  • A (i) and (ii) only
  • B (i), (ii) and (iii) only
  • C (i), (ii), (iii) and (iv)
  • D (ii) and (iii) only
Correct Option: D  [ (ii) and (iii) only ] Stored explanation
Explanation
  • Correct option: (ii) and (iii) only. Kepler is known for the Laws of planetary motion, and Galileo confirmed moons of Jupiter.
  • Why others are wrong:
    • Copernicus did not propose the law of gravitation; he proposed the heliocentric theory.
    • Newton formulated the law of gravitation and helped support heliocentrism, but he is not paired with heliocentric theory in the given options.
Key concept: distinguishing heliocentric theory from gravitation; Kepler’s laws describe orbital motion; Galileo’s telescopic observations included Jupiter’s moons. Exam tip: memorize who linked to heliocentric theory vs gravity to quickly judge similar MCQs.
Q. 4336
👁 0 views
One should not connect a number of electrical appliances to the same power socket because

(i) this can damage the appliances

(ii) this can damage the domestic wiring due to overheating

(iii) the appliances will not get full voltage

Select the valid reason/reasons using the codes given below.
  • A (ii) and (iii) only
  • B (ii) only
  • C (i) and (ii) only
  • D (iii) only
Correct Option: B  [ (ii) only ]
Preparing explanation...
Q. 4335
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For a given liquid, the rate of evaporation depends on

(i) the temperature of the liquid

(ii) the temperature of air

(iii) the surface area of the liquid

Select the correct factor/factors using the codes given below.
  • A (i) only
  • B (i) and (ii) only
  • C (ii) and (iii) only
  • D (i), (ii) and (iii)
Correct Option: D  [ (i), (ii) and (iii) ]
Preparing explanation...
Q. 4334
👁 0 views
Which of the following groups contains/contain only nonbiodegradable materials?

(i) Wood, paper, leather

(ii) Plastic, bakelite, DDT

(iii) Plastic, thermocol, wood

(iv) Thermocol, plates made from dried leaves, detergents

Select the correct answer using the codes given below.
  • A (i) and (ii) only
  • B (ii) only
  • C (ii) and (iii) only
  • D (iii) and (iv) only
Correct Option: B  [ (ii) only ]
Preparing explanation...
Q. 4333
👁 1 views
Paddy fields are chief sources of which of the following greenhouse gases?

(i) Methane

(ii) Carbon dioxide

(iii) Nitrous oxide

(iv) Ozone

Select the correct answer using the codes given below.
  • A (i) only
  • B (ii) only
  • C (i) and (iii) only
  • D (ii), (iii) and (iv) only
Correct Option: A  [ (i) only ] Stored explanation
Correct option: A
  • Reason: Paddy fields are flooded, creating anaerobic (oxygen-free) conditions. Methanogenic microbes produce methane (CH4), a potent greenhouse gas.
  • Key concept: Methanogenesis in anaerobic soils leads to CH4 release; CO2, N2O, O3 are not the chief gases from flooded rice paddies.
  • Why others are incorrect: - (ii) CO2: produced but not the chief gas from flooded paddies; many CO2 sources exist. - (iii) N2O: produced in soils/agriculture but to a lesser extent in flooded paddies. - (iv) Ozone: not directly emitted by paddy fields.
  • Exam tip: Remember “flooded rice fields → methane (CH4) dominant.”
Q. 4332
👁 0 views
The mass of a body is different from its weight because

(i) mass is a variable quantity whereas weight is constant

(ii) mass varies very little at different places whereas weight varies a lot

(iii) mass is constant but weight decreases as the body moves from the Poles to the Equator

(iv) mass is a measure of quantity of matter whereas weight is a force

Select the correct reason/reasons using the codes given below.
  • A (i) only
  • B (ii) and (iv) only
  • C (iii) only
  • D (iii) and (iv) only
Correct Option: B  [ (ii) and (iv) only ]
Preparing explanation...
Q. 4331
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It is easier to roll a barrel than to pull it because
  • A the full weight of the barrel comes into play when it is pulled
  • B rolling friction is much less than sliding friction
  • C the surface area of the barrel in contact with the road is more in case of pulling
  • D of a reason other than those mentioned
Correct Option: B  [ rolling friction is much less than sliding friction ]
Preparing explanation...
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