1. Water is heated in a kettle. The inside water is heated by convection. A person sitting near the fire receives heat by:

a) Conduction
b) Convection
c) Radiation
d) Reflection
e) None of these

15. German Silver is an alloy of:

A) Zn + Ni
b) Cu + Zn
c) Cu + Ni Zn is not an essential part of German silver
d) Cu + Sn


37. Polygenic characteristic are controlled by :

a) Dominant genes
b) Recessive genes
c) Multiple genes
d) Mutated genes
e) None of these

41. Which of the following is an organic molecule needed by the body in small amounts?

a) Protein
b) Vitamin C
c) Zinc
d) Monosaccharide ( monosaccharide is the largest needed molecule not smallest)
e) None of these

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Man is harder than iron, stronger than stone, and more fragile than a rose.