Sets
General Science Set 68
30 questions 1. A steel rod is prevented from expanding while its temperature rises by 20 K. If αl = 1.2 × 10⁻⁵ K⁻¹ and Young's modulus Y = 2 × 10¹¹ N m⁻², the thermal stress developed is:
2. Earth's nearly circular orbit mainly ensures that:
3. Consider the following uses:
(I) Washing soda is used in glass, soap and paper industries.
(II) Washing soda is used in the manufacture of borax.
(III) Washing soda is used to make drinking water free from germs.
Which of the above is/are correct?
4. Consider the following statements:
(I) Magnetic field lines are closed curves.
(II) The field lines are crowded where the magnetic field is stronger.
(III) Two magnetic field lines can cross each other near the poles.
Which of the above is/are correct?
5. Which of the following is a parasitic plant?
6. In traditional Indian measurement, 'angula' refers to:
7. The formula of magnesium hydroxide is:
8. Water and minerals are transported from the roots to the leaves and other parts of the plant through the:
9. With the potential energy taken as zero at infinite separation, the gravitational potential energy of two particles of masses m₁ and m₂ separated by a distance r is:
10. The scientific name of the lion is:
11. The electrolysis of aqueous sodium chloride (brine) is called the:
12. According to Maxwell's electromagnetic theory, an accelerated charged particle emits:
13. Some leaves appear red, violet or brown because they contain more of:
14. The ratio of the number of hydrogen atoms to oxygen atoms in water is:
15. The slope of a velocity-time graph gives:
16. PPLO stands for:
17. The SI unit of resistance is:
18. The reaction between an acid and a base to give a salt and water is called:
19. Which pollination strategy releases more pollen grains per flower?
20. The lens formula relating object distance u, image distance v and focal length f is: