276: Which one of the following distance-time graph (x-t) represents one-dimensional uniform motion ?
(a) (a)
(b) (b)
(c) (c)
(d) (d)
Explanation:
During uniform motion, the slope of the graph will not change with time.
277: Galvanising of sheet iron is done by dipping the sheet metal into molten
(a) Mercury
(b) Cadmium
(c) Lead
(d) Zinc
278: The final product of photosynthesis is:
(a) Carbohydrates
(b) Carbon dioxide
(c) Oxygen
(d) Water
279: The Vitamin responsible for anti-sterile activity is:
(a) Vitamin A
(b) Vitamin B
(c) Vitamin E
(d) Vitamin D
280: Higher plants take up Nitrogen as:
(a) Nitrites only
(b) Nitrates only
(c) Nitrates and ammonia
(d) Urea