Chemical reaction and equation

What will be the colour of silver chloride when it is kept in sunlight

• White

• Grey

• Green

• Black

The respiration process during which glucose undergoes slow combustion by combining with oxygen in the cells of our body to produce energy, is a kind of:

• Exothermic process

• Endothermic process

• Reversible process

• Physical process

It is necessary to balance a chemical equation in order to satisfy the law of

• Conservation of motion

• Conservation of momentum

• Conservation of energy

• Conservation of mass

When ferrous sulphate is heated strongly it undergoes decomposition to form ferric oxide as a main product accompanied by a change in colour from

• Blue to green.

• Green to blue.

• Green to brown.

• Green to yellow.

Which of the following gases is used in the storage of fat and oil containing foods for a long time?

• Carbondioxide gas

• Nitrogen gas

• Oxygen gas

• Neon gas

Rancidity can be prevented by

• adding antioxidants

• storing food away from light

• keeping food in refrigerator

• all of these

The reaction in which two compound exchange their ions to form two new compounds is called

• displacement reaction

• combination reaction

• double displacement reaction

• redox reaction

On immersing an iron nail in CuSO4 solution for few minutes, you will observe

• no reaction takes place

• the colour of solution change into red colour

• the surface of iron nails acquire a black coating

• the colour of solution changes to green

Fatty foods become rancid due to the process of

• oxidation

• reduction

• Corrosion

• Hydrogenation

The decomposition of organic waste, is a kind of:

• Exothermic process

• Endothermic process

• Reversible process

• Physical process