General science - Multiple Choice Questions (MCQs) – Page 2

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Recent MCQs

The term antibiotic was coined by

  1. Davie and Ratnoff
  2. Edward O. Wilson
  3. M. Pearl
  4. Selman Waksman
General science

The relative contribution of different green house gases to global warming is given below. Identify the incorrect pair.

  1. CH4 – 20%
  2. CFCs – 14%
  3. CO2 – 40%
  4. N2O – 6%
General science

Which of the following helps some hydrophytes to thrive in wetlands and marshes where water level fluctuates time to time ?

  1. Rhizomatous roots
  2. Submergent roots
  3. Aerenchyma tissue
  4. Rhizophores
General science

Organisms which grow best in the temperature range of 0-15 °C are referred to as :

  1. Thermophiles
  2. Psychrophiles
  3. Hydrophiles
  4. Mesophiles
General science

Which one of the following is the highest reactive metal ?

  1. Sodium
  2. Potassium
  3. Calcium
  4. Iron
General science

Food cans are coated with Tin instead of Zinc, because

  1. Zinc is expensive than Tin.
  2. The melting point of Zinc is higher than Tin .
  3. Zinc is more reactive than Tin.
  4. Zinc is less reactive than Tin.
General science

What will be the de Broglie wavelength of a ball of mass 0.12 kg moving with a speed of 20 ms–1 ?

  1. 6.63 × 10–30 m
  2. 6.63 × 10–34 m
  3. 2.76 × 10–30 m
  4. 2.76 × 10–34 m
General science

Two slits are made one millimetre apart and the screen is placed one metre away. What is the fringe separation when blue-green light of wavelength 500 nm is used ?

  1. 0.5 m
  2. 0.5 mm
  3. 50 mm
  4. 50 m
General science

Consider a tightly wound 100 turn coil of radius 10 cm, carrying a current of 1A. What will be the magnitude of the magnetic field at the centre of the coil ?

  1. 6.28 × 10–4 T
  2. 6.28 × 10–3 T
  3. 2.68 × 10–4 T
  4. 6.82 × 10–2 T
General science

The term GHz is the indicator of which feature of the computer ?

  1. Number of Pixels
  2. Resolution
  3. Speed
  4. Storage
General science

Epeirogenic forces are result of :

  1. Horizontal earth movements
  2. Vertical earth movements
  3. Mass movements
  4. Displacement
General science

The bright outer layer of the sun is known as :

  1. Photosphere
  2. Ionosphere
  3. Mesosphere
  4. Sunspots
General science

Neutron was discovered by:

  1. Chadwick
  2. Rutherford
  3. Bohr
  4. Newton
General science

Neutron was discovered by:

  1. Chadwick
  2. Rutherford
  3. Bohr
  4. Newton
General science

Which of the following statements is not true?

  1. Chromosomes are composed of DNA and Protein.
  2. Nucleus of a cell does not play a role in cellular reproduction.
  3. Chromosomes contain information for inheritance.
  4. Functional segment of DNA is called genes.
General science

Pyrethrin used in mosquito coil is obtained from

  1. a seed plant
  2. an insect
  3. a bacterium
  4. a fungus
General science

Why do pendulum clocks usually lose time in summer?

  1. Due to longer days in summer
  2. Due to friction caused by coils
  3. Length of the pendulum increases, increasing the time period of unit oscillation
  4. The weight of the pendulum increases in summer
General science

Assertion (A): Insolation is the most important source of energy for the biospheric ecosystem.
Reason (R): Solar radiation is converted into food and chemical energy by green plants.

Codes:

  1. Both A and R are true and R is the correct explanation of A
  2. Both A and R are true but R is the correct explanation of A
  3. A is true but R is false
  4. A is false but R is true
General science

Diffusion of light in the atmosphere takes place due to:

  1. Carbon dioxide
  2. Dust particles
  3. Helium
  4. Water vapours
General science

Wilhelm Rontgen invented

  1. Radio
  2. X-Ray Machine
  3. Electric Bulb
  4. Electric Motor
General science

Main functions of White blood cells are?

  1. To carry oxygen
  2. To carry CO2
  3. To develop immunity
  4. None of these
General science

An artificial satellite can be tracked very precisely from the earth by using:

  1. Doppler effect
  2. Radar
  3. Sonar
  4. Pulsar
General science

Which one of the following atmospheric change takes place due to the greenhouse effect?

  1. Increase in carbon dioxide concentration in the atmosphere
  2. Increase in humidity in the atmosphere
  3. Increase in biological population
  4. Increase in wind speed
General science

After menopause, production of which of the following hormones does not take place in women?

  1. Progesterone
  2. Testosterone
  3. Estrogen
  4. None of these
General science