Lead pencil is made of: NTS PST 24/11/2019 (2:30)
a) sodium
b) graphite
c) aluminum
d) silver
Substance that has physical properties opposite to those of metals is known as
a) Dull
b) Transparent
c) Non-metal
d) metal
When elements are joined chemically in a compound, they:
a) lose their original properties
b) keep their original properties
c) become a mixture
d) become another element
Which of the following does not describe element?
a) all particles are alike
b) can join together to form compounds
c) can be broken down into simpler substances
d) have a particular properties
Which substance is a compound?
a) carbon
b) chlorine
c) sodium chloride
d) sodium
In common salt, sodium and chlorine are present in the ratio of: NTS PST –P-2----2015
a) 1:1
b) 1:2
c) 2:1
d) 2:3
