71) Which gas is used in balloons?
(A) Oxygen
(B) Helium
(C) Hydrogen
(D) None of these
72) The process in which the leaves absorb sunlight and use the energy to synthsize carbohydrate from and water is called?
(A) Oxygenation
(B) Photosynthesis
(C) Hybrid regeneration
(D) None of these
73) What is peanut?
(A) Leaf
(B) Stem
(C) Rose
(D) None of these
74) Law of gravity was given by?
(A) Newton
(B) Dalton
(C) Einstein
(D) None of these
75) The weathers on the earth are changed with rotation of earth around?
(A) Sun revolution of sun
(B) Its axis earth rotation its axis
(C) Both (a) & (b)
(D) Revolution of the Earth
76) Cultivation of rice needs?
(A) Plenty of water
(B) Low quantity of water
(C) Medium level of water
(D) None
77) Wheat is Punjab is reaped in the month of?
(A) June
(B) July
(C) May
(D) None
78) At the peaks of high mountains the boiling temperature of water?
(A) Increase
(B) decrease
(C) do not change
(D) None
79) What is HCL?
(A) An Alkali base
(B) Acid
(C) Neutral
(D) None
80) Who same the idea of law of inertia?
(A) Dalton
(B) Newton
(C) Michael
(D) None