981. What metallic element is also called wolfram?
A: Technetium
B: Antimony
C: Tungsten
D: Astatine
982. Who invented logarithm tables?
A: John Napier
B: H. Moseley
C: N. Bohr
D: Chadwick
983. Which of the followings tells us how many protons an atom has?
A: Mass
B: Weight
C: Atomic number
D: Charge
984. The most abundant constituent of atmospheric air is :
A: Carbon
B: Hydrogen
C: Oxygen
D: Nitrogen
985. Plants are called the __ of nature :
A: Stomach
B: Liver
C: Heart
D: Lungs
986. What makes the green color of plants?
A: Chloroplast
B: Chlorophyll
C: Plasmids
D: None of these
987. What is the outermost boundary of plants?
A: Cell membrane
B: Cytoplasm
C: Nucleus
D: Cell wall
988. John Walker invented :
A: Safety Match
B: Safety razor
C: Safety pin
D: Safety Valve
989. The following substances are used to bleach paper pulp:
A: Caustic soda
B: Sodium
C: Lime
D: Alum
990. Amnesia is related to :
A: Loss of memory
B: Loss of hearing
C: Sleeping sickness
D: Loss of teeth
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