MCQs For Chemical Reactions and Equations

The chemical reaction between Hydrogen sulphide and iodine to give Hydrogen iodide and sulphur is given:
The reducing and oxidizing agents involved in this redox reaction are?

The neutralization reaction between an acid and a base is a type of?

The displacement reaction between iron (III) oxide and a metal X is used for welding the rail tracks. Here X is:

Following is given a diagram showing an experimental set-up:
The given set-up is used to carry out:

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

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

You are given the following chemical reaction:
CuO + H2 -heat- Cu + H2O
This reaction represents:

Rusting of iron involves a chemical reaction which is a combination of?

All the methods mentioned below can be used to prevent the food from getting rancid except:-
i. Storing the food in the air-tight containers
ii. Storing the food in refrigerator
iii. Keeping the food in clean and covered containers
iv. Always touching the food with clean hands

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

One of the following processes does not involve a chemical reaction. That is ?

A chemical reaction does not involve ?

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 ?

In a chemical reaction between sulphuric acid and barium chloride solution the white precipitates formed are of ?

Before burning in air, the magnesium ribbon is cleaned by rubbing with a sand paper to ?

An element X on exposure to moist air turns reddish-brown and a new compound Y is formed. The substance X and Y are ?

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

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

The reaction of H2 gas with oxygen gas to form water is an example of ?

Rancidity can be prevented by

In which of the following, heat energy will be evolved?

When a magnesium ribbon is burnt in air, the ash formed is ?

When carbon dioxide is passed through lime water ?

Dilute hydrochloric acid is added to granulated zinc taken in a test tube. The following observations are recorded. Point out the correct observation.

When crystals of lead nitrate are heated strongly in a dry test tube ?

Which information is not conveyed by a balanced chemical equation?

Chemically rust is ?

Both CO2 and H2 gases are ?

Which of the following gases can be used for storage of fresh sampel of an oil for a long time?

The electrolytic decomposition of water gives H2 and O2 in the ratio of

In the decomposition of lead (II) nitrate to give lead (II) oxide, nitrogen dioxide and oxygen gas, the coefficient of nitrogen dioxide (in the balanced equation) is

Fatty foods become rancid due to the process of

We store silver chloride in a dark coloured bottle because it is ?

Silver article turns black when kept in the open for a few days due to formation of ?

Silver article turns black when kept in the open for a few days due to formation of ?