1.The bell metal is consist of-
A.Nickel and copper
B.Zinc and copper-
C.Tin and copper
D.Tin and aluminium
2. Parsec unit is a measure of-
A.Brightness of heavenly body
B.Astronomical distance
C.Density of stars
D.for expressing distances to stars and galaxies
3.Plants synthesize protein from
A.starch
B.sugar
C.amino acids
D.fatty acids
4. Atoms of the same element, i. e., having the Same atomic number that differ in atomic Weight, are called-
A.Isotopes
B.Isomers
C.Isobars
D. Isohyets
5.The quantum number that tends to specify the orientation in space for an orbital is the-
A.Principal quantum number
B.Orbital quantum number
C.Magnetic quantum number
D.Spin quantum number
6.Carbohydrates are the compounds of-
A.Carbon and hydrogen
B.Carbon, oxygen and hydrogen
C.Carbon, oxygen, hydrogen and nitrogen
D.Carbon, nitrogen and hydrogen
7. Vestigeal organs are those which are
A.Fully formed and functional
B.Much reduced but functional
C.Much reduced and functionless
D.Fully formed but functionless
8.When water freezes its density-
A.Increases
B.Decreases
C.remains constant
D.Becomes zero
9. A chemical reaction that takes place with the evolution of heat is called a/an-
A.Reversible reaction
B.Endothermic reaction
C.Thermal reaction
D.Exothermic reaction
10.The manufacture of iron ore involves the process of-
A.Oxidation
B.Reduction
C.Fractional distillation
D.Electrolysis
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