Which lubricant is used for heavy machines?
(A) Bauxite
(B) Phosphorus
(C) Graphite
(D) Silicon oil
Which of the following is not a chemical fertilizer?
(A) Urea
(B) Sodium Sulphate
(C) Super Phosphate
(D) Potassium Nitrate
Energy possessed by a body due to its stationary is called its
(A) heat energy
(B) kinetic energy
(C) potential energy
(D) chemical energy
Which one of the following is highly dangerous radioactive pollutant ?
(A) Phosphorus-32
(B) Sulphur-35
(C) Strontium-90
(D) Calcium-40
When chlorophyll is burnt which element is obtained?
(A) Ca
(B) Na
(C) Mg
(D) Mn
The term ‘ecosystem’ was proposed by—
(A) Odum
(B) Tansley
(C) Whitker
(D) Goli
Genes are made by—
(A) Histones
(B) Lipoproteins
(C) Hydrocarbons
(D) Polynucleotides
What among following is used to produce artificial rain ?
(A) copper oxide
(B) carbon monoxide
(C) silver iodide
(D) silver nitrate
What happens when a chemical bond is formed ?
(A) Energy is always absorbed
(B) Energy in always released
(C) More energy is released than is absorbed
(D) Energy is neither released nor absorbed
When the Left Ventricle in the human heart contracts, the blood moves to the
(A) Brain
(B) Pulmonary Artery
(C) Aorta
(D) Lungs
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