Question

2. The smallest independent unit of matter
is :
(a) element
(b) molecule
(c) atom
(d) compound
3. An element is made up of :
(a) two kinds of atoms
(b) many kinds of atoms
(c) one kind of atoms
(d) one kind of molecules
4. The symbol for one molecule of nitrogen
is :
(b) NZ
(d) none of these
5. The formula of aluminium sulphate is :
(a) AISO
(b) Al(SO4)2
(c) Al(SO4)3 (d) Al2(SO4)3
(a) N.
(c) 2N​

Answer 1

2. The smallest independent unit of matter

is atom

3. An element is made up of one kind of atoms

4.The symbol for one molecule of nitrogen

is N

5. The formula of aluminium sulphate is Al2(SO4)3