Chemical Reactions and equations

Front

The process of wasting away of metals on exposure to moist air is called ____________.

Back

corrosion

Front

CaO + H2O --> Ca(OH)2. This is an example of:

Back

Combination reaction

Front

Assertion: Zinc reacts with sulphuric acid to form zinc sulphate and hydrogen gas and it is a displacement reaction. Reason: Zinc reacts with oxygen to form zinc oxide. What is the relationship?

Back

Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.

Front

________ of electrons is oxidation.

Back

loss

Front

Assertion: AgBr is used on photographic and X-ray film. Reason: AgBr is photosensitive and changes to Ag and bromine in presence of sunlight and undergoes decomposition reaction. What is the relationship?

Back

Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.

Front

What is a chemical reaction?

Back

A process that involves the transformation of one or more substances into different substances.

Front

Define oxidation in terms of electron transfer.

Back

Oxidation is the loss of electrons from a substance.

Front

Define reduction in terms of electron transfer.

Back

Reduction is the gain of electrons by a substance.

Front

What is a combination reaction?

Back

A reaction where two or more substances combine to form a single product.

Front

What is a decomposition reaction?

Back

A reaction where a single compound breaks down into two or more simpler products.