Question

1. Fill in the blanks :

(a) Dalton used symbol..
for oxygen and .....
...... for hydrogen.

(b) Symbol represents
........ atom of an element.

(c) Symbolic expression for a molecule is called .......

(d) Sodium chloride has two radicals. Sodium is a ............... radical while chloride is a ................ radical.

(e) Valency of phosphorus in PCI, is ............
.......... and in PCI, is ...
(1) Valency of Iron in FeCl, is ................ and in FeCl, it is

(g) Formula of iron (III) carbonate is .....
​

Answer 1

Answer:

(a) two

(b) one

(c) formula

(d) basic,acidic

(e) 3,5

(f) 2

(g) Fe

Answer 2

$\blue{ \underline{\sf{1. Fill \: in \: the \: blanks :-}}}$

$\red{ \sf{1. O \: and \: H}}$

$\red{ \sf{2. \: one}}$

$\red{ \sf{3. \:Molecular \: formula }}$

$\red{ \sf{4.basic \: \: and \: \: acidic}}$

$\red{ \sf{5. \: 4 \: }}$

$\red{ \sf{6. \: 2 \: \: and \: \: 3}}$

$\red{ \sf{7. \: Fe_2(Co_3)_3}}$