DIAGNOSTIC TEST CLASS IX

Identify symbol of sodium

• Na

• So

• Sa

• Ne

----------- is the symbol of copper

• Ca

• Cu

• Cp

• Co

Basic building unit of matter

• molecule

• compound

• atom

I n --------------two or more elements combined in fixed ratio.

• elements

• molecule

• compound

• mixture

In a balanced chemical equation

• number of reactants=number of products

• Total number of atoms in reactant side=total number of atoms in product side

• same type of atoms on both side

• balanced

• not balanced

Identify alkali

• NaOH

• HCl

• H2SO4

• Fe(OH)2

The reaction between acid and base

• neutralization reaction

• decomposition reaction

Two components in solution

• solute and solvent

• solute and solution

• solute and solid

separation technique to separate petrol from crude oil

• Fractional distillation

• distillation

• crystallisation