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When the radiation of light is passed through a prism, it undergoes __________?
A. reflection B. interference C. diffraction D. refraction Submitted by :- Jamil Ahmed
__________ is one of the allotropic modifications of carbon.
A. Silicon B. Diamond C. Iodine D. Graphite Submitted by :- Jamil Ahmed
As the temperature rises, the speed of sound:
(A) Drops (B) rises (C) Remains constant (D) Becomes unpredictable Submitted by :- Muhammad Nawaz
The organic nutrient with the high calorific value is:
(A) Sugar (B) Starch (C) Fat (D) Protein Submitted by :- Muhammad Nawaz
Cola seeds contains quantities of:
(A) Nicotine (B) Caffeine (C) Opium (D) Morphine Submitted by :- Muhammad Nawaz
Which is used in measurement of high temperature?
(A) Mercury thermometers (B) Platinum resistance thermometers (C) Thermo-electric pyrometers (D) None of these Submitted by :- Muhammad Nawaz
Chemical compounds, Protein in nature, made in the cells of living organisms are called:
(A) Hormones (B) Enzymes (C) Amino acids (D) Vitamins Submitted by :- Muhammad Nawaz
Unequal expansion of metals makes possible the operation:
(A) Aneroid barometer (B) Hygrometers (C) Liquid thermometers (D) Thermostats .. Submitted by :- Muhammad Nawaz
When water vapours come into contact with the earth vegetation, it leaves drops of water on its leaves, what is called?
(A) Fog (B) Mist (C) Dew (D) Rain-drop Submitted by :- Muhammad Nawaz
Which one of the following is important for the normal functioning of plant cell
(A) Rigidity (B) Flexibility (C) impermeability (D) Solubility Submitted by :- Muhammad Nawaz