General Science and Technology Question Answer

Q136. The filament of an electric bulb is made of
(a) Iron
(b) Tungsten
(c) Graphite
(d) None of the above

Q137. Which element has the highest electronegativity
(a) Francium
(b) Gallium
(c) Copper
(d) Flourine

Q138. Which one of the following types of solar radiation does sunscreen protect the skin from
(a) X-ray
(b) Infrared
(c) Ultraviolet
(d) Microwaves

Q139. What gas is the main causes of rise in temperatures in the atmosphere
(a) Hydrogen
(b) Helium
(c) Carbon-dioxide
(d) Radon

Q140. Glass is made of the mixture of
(a) Sand and Silicates
(b) Mica and Quartz
(c) Salt and Silicates
(d) None of the above

Q141. Karosene is a mixture of
(a) Hydrocarbons
(b) Hydrogen Peroxide
(c) Carbohydrates
(d) None of the above

Q142. Heavy Water is normally used in the following types of industries
(a) Sugar Plants
(b) Pharma Industry
(c) Nuclear Power Plants
(d) Paper Industry

Q143. Solutions with a pH level greater than 7 are known as
(a) Acidic
(b) Alkaline
(c) Pure Water
(d) None of the above

Q144. What is the general pH level at human skin
(a) 3.2
(b) 3.9
(c) 4.7
(d) 5.5

Q145. Deuterium oxide is also known as
(a) Soda water
(b) Heavy Water
(c) Distilled water
(d) None of the above

Q146. The blue colour of the clear sky is due to __________ of light
(a) Reflection
(b) Refraction
(c) Diffraction
(d) Dispersion

Q147. Bleaching powder is also chemically known as
(a) Calcium sulphate
(b) Calcium Carbonate
(c) Calcium hypochlorite
(d) Sodium hydroxide

Q148. Which one is the closet Satellite to the parent planet in our solar system
(a) Hyperion
(b) Phobos
(c) Charon
(d) Moon

Q149. Which planet is also known as morning star and evening star
(a) Mercury
(b) Neptune
(c) Venus
(d) Uranus

Q150. Which planet in the solar system is also known as red planet
(a) Mars
(b) Urenus
(c) Venus
(d) Neptune

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