Water — CHEMISTRY STD 6 — Question

Write the correct statements :
Concentration of dissolved salts in sea water increases every year, because the rivers discharge in it more dissolved salts.

Write the symbol of following metals:potassium

Select natural and man made matter from the following list:
Wood, plastic, silk, medicines, detergents, coal, water, ceramic, cotton, glass, nylon, fruits.

Write the number of atoms of each element in following molecules : Al2(SO4)3

Name two compounds which dissolve in water.

Match the symbols of non-metallic elements with their correct combining power or capacity.

(a) O
(b) S
(c) Cl

Combining power or capacity A : 3; B : 2; C : 1. (negative valencies)

write the correct correct statement:
At boiling point the substance occur into both solid and liquid state.

Name the non-metals with following symbols:I

Define the following terms: Fusion

Define: interconversion of states of matter.