General science - Multiple Choice Questions (MCQs) – Page 20

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Recent MCQs

To look total image of a person, the minimum height of a plane mirror is:

  1. Equal to the height of a person.
  2. Half of the height of a person.
  3. One fourth of the height of a person.
  4. Two times the height of a person.
General science

Which one of the following is used as the coolant in the "Fast Breeder Test Reactor" at Kalpakkam?

  1. Carbon dioxide
  2. Heavy water
  3. Sea water
  4. Molten sodium
General science

Which yeast is used for commercial production of ethanol?

  1. Candida Albicans
  2. Saccharomyces cerevisiae
  3. Candida sloofi
  4. Leucosporidium frigidum
General science

The movement of nutrient elements through the various components of an ecosystem is called.

  1. Bio-geo-chemical cycle
  2. Bio-geological cycle
  3. Ecological succession
  4. Biological cycle
General science

Consider the following statements about haemoglobin:

1) It carries oxygen in the blood.
2) It is iron containing compound.
3) It provides immunity against certain disease.
4) It imparts red colour to the blood.

The correct statements out of these are:

  1. 1,2 and 3
  2. 2, 3 and 4
  3. 1, 3 and 4
  4. 1, 2 and 4
General science

Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).

Assertion (A): A solution of table salt in a glass of water is homogeneous.
Reason (R): A solution having different composition throughout is homogeneous.

Select the correct answer from the code given below:
Code:

  1. (A) is false but (R) is true
  2. (A) is true but (R) is false
  3. Both (A) and (R) are true but (R) is not the correct explanation of (A)
  4. Both (A) and (R) are true and (R) is the correct explanation of (A)
General science

Given below are two statements, one labelled as:

Assertion (A): Human body synthesises all the vitamins required by it.
Reason (R): Vitamins are essential for proper growth of the body.

Select the correct answer from the codes give below:

  1. Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. Both (A) and (R) re true but (R) is not the correct explanation of (A)
  3. (A) is true, but (R) is false
  4. (A) is false, but (R) is true
General science

The number of images of an object placed between two parallel mirrors is:

  1. Two
  2. One
  3. Six
  4. Infinite
General science

Which one of the following is not correctly matched? Nitrogen fixing agent – Crop

  1. Blue green algae – Paddy
  2. Rhizobium Leguminisarum – Pea
  3. Azotobacter – Wheat
  4. Azolla – Maize
General science

Which one of the following liquids is very good conductor of heat?

  1. Mercury
  2. Water
  3. Ether
  4. Benzene
General science

Which of the following gland in human body acts both as Endocrine and Exocrine gland ?

  1. Adrenal Gland
  2. Lacrimal Gland
  3. Pancreas Gland
  4. Thyroid
General science

Which one of the following parts of Mentha possesses maximum oil percentage?

  1. Root
  2. Stem
  3. Leaf
  4. Flower
General science

Which one of the following organs will not feel any pain on being pricked by a needle?

  1. Skin
  2. Brain
  3. Eye
  4. Heart
General science

Which one of the following energy conversions takes place in carrying out the process of photosynthesis?

  1. light to chemical energy
  2. light to thermal energy
  3. thermal to biochemical energy
  4. heat to kinetic energy
General science

Einstein was award Nobel Prize for which of his theories?

  1. Theory of relativity
  2. Theory of photo electricity
  3. Theory of specific heats
  4. Theory of Brounian motion
General science

Liquid crystals are used in:

  1. Wrist watches
  2. Display devices
  3. Pocket calculators
  4. All the above
General science

The velocity of wind is measured by

  1. Barometer
  2. Anemometer
  3. Hydrometer
  4. Wind Vane
General science

Cholestrol is

  1. an insecticide
  2. a vitamin
  3. a steroid
  4. an enzyme
General science

Which of the following is used in Genetic-Engineering?

  1. Plastid
  2. Plasmid
  3. Mitochondria
  4. Ribosome
General science

Which one of the following is used in food preservation?

  1. Sodium Carbonate
  2. Acetylene
  3. Benzoic Acid
  4. Sodium Chloride
General science

Isotopes are atoms of an element whose:

  1. atomic weight is same, but atomic number is different
  2. atomic weight different, but atomic number same
  3. atomic number and atomic weight are same
  4. none of these
General science

The colour of the Star is an indication of its

  1. distance from earth
  2. temperature
  3. luminosity
  4. distance from the Sun
General science

Which one of the following is NOT correctly matched?(Substance) (Use)

  1. Silver bromide - Artificial photosynthesis
  2. Silver iodide - Artificial rain
  3. Lithium bicarbonate - Treatment of rheumatism
  4. Milk of magnesia - Antacid
General science

Which one of the following silver salts is used for producing artificial rains?

  1. Silver chloride
  2. Silver bromide
  3. Silver nitrate
  4. Silver iodide
General science