When a bicycle is in motion, the force of friction exerted by the ground on the two wheels is such that it acts
A In the backward direction on the front wheel and in the forward direction on the rear wheel
B In the forward direction on the front wheel and in the backward direction on the rear wheel
C In the forward direction on both front and the rear wheels
D None of these.
Four students P, Q, R and S have to dissolve maximum amount of sugar in the same amount of water so as to win in a game.
P : Took hot boiling water.
Q : Took ice cold water.
R : Added more water on dissolving sugar in hot water.
S : Took ice cold water and added more water.
Whom do you think would win the game?
In its first year of business, a company had 5 employees. In its second year, there were 25 employees, and in its third year, there were 125 employees. If the pattern continues, how many employees will the company have in the fourth year?
Few statements are given below. Identify the incorrect statements and mark the appropriate option.
(i) In fractional distillation of petroleum, hydrocarbon with lowest boiling point condenses first.
(ii) Useful substances obtained from petroleum and natural gas are termed as ‘Petrochemicals’.
(iii) Coke is used in the extraction of many metals.
(iv) Paraffin wax used in candles, vaseline, grease, polish is obtained by destructive distillation of coal.
A (i) and (ii)
B (i) and (iv)
C (i), (ii) and (iii)
D (ii) and (iv)
It should be d
Which of these differences between insect-pollinated flowers and wind-pollinated flowers is incorrect?