Sets
General Science Set 30
30 questions 1. Detergents are generally sodium salts of:
2. Which pair of phyla possesses an exoskeleton?
3. The shearing stress of fluids is about ___ times smaller than that of solids.
4. Substances whose odour changes in acidic or basic media are called:
5. Consider the following pairs:
(I) Producers – First trophic level
(II) Primary consumers – Second trophic level
(III) Secondary consumers – Fourth trophic level
Which of the pairs given above is/are correctly matched?
6. Consider the following statements about X-rays:
(I) They are not deflected by electric and magnetic fields.
(II) They have very high penetrating power through matter.
(III) They are deflected by a magnetic field.
Which of the above is/are correct?
7. The inbuilt tendency for variation during reproduction is the basis for:
8. As the temperature of a blackbody increases, the wavelength at which the emitted energy is maximum:
9. A homogeneous mixture of two or more metals, or a metal and a non-metal, is called:
10. The Chipko movement began in the early 1970s in:
11. A potential difference of 24 V across a resistor causes a current of 3 A. The resistance of the resistor is:
12. Consider the following pairs:
(I) Rusting – Chemical change
(II) Melting of ice – Physical change
(III) Burning of magnesium – Physical change
Which of the pairs given above is/are correctly matched?
13. Potassium hydroxide is used to absorb:
14. The motion of a simple pendulum is approximately simple harmonic when its angular displacement is:
15. The reddish brown coating on iron articles is called:
16. The menstrual cycle usually begins at puberty between the ages of:
17. J. J. Thomson was awarded the Nobel Prize in Physics in:
18. The heart is called myogenic because its normal activity is regulated by:
19. Carbon monoxide contains carbon and oxygen in the mass ratio of 3:4. The mass of oxygen that combines with 6 g of carbon is:
20. Which of the following media has the highest refractive index?