10class balancing chemical Equations Test 1

What is the colour of copper sulphate?

• Red
• White
• Blue
• Yellow

Not a physical chage

• Boiling water to get water vapour
• Melting of ice to get water
• Dissolving of salt I water
• Combistion of LPG

A chemical reaction.

• Storing of oxygen gas in cylinders
• Liquification of gas
• Melting of ice to water
• Heating of copper wire at high temperature in air

Chemical reactions occur with the formation and breaking of

• Reactants
• Chemical bonds
• Products
• None

A decomposition reaction is carried out by heating. It is called

• Thermal decomposition
• Chemical Equation
• Thermal Equilibrium
• None of the Above

When Zinc pieces reat with dilute hydrochloric acid this gas is liberated

• Oxygen
• Hydrogen
• Zinc
• Chlorine

The formula of glucose is

• H2O
• C6H6
• C6H12O6
• C3H8

Burning of crackers is

• Physical change
• Chemical change
• Not a change
• No answer

Addition of water to powdered lime is

• Physical change
• Chemical change
• Not a change
• No answer

The process of digestion is

• Physical change
• Chemical change
• Not a change
• No answer