Why do we add little dilute sulphuric acid to copper sulphate solution during electroplating?

Out of the following, which metal is used to electroplate iron to make it shining and rust resistant?

Read the given statements and mark the appropriate answer.

Statement 1: Fabric made from this polyester does not get wrinkled easily.

Statement 2: Polyester is a natural fibre.

Radhika wants to electroplate a plate with ZINC. She has a Zinc bar and the plate. But she does not know which should be the anode and which should be the cathode.

Which of these is plated on the iron to prevent it from chemically reacting with food?

See the figure given below and select the correct statements regarding polymers.

1. Figure (X) shows structure of a monomer while figure (Y) shows structure of a polymer.

2. Small boxes in the structure represent monomers that are joined to give a polymer.

3. Figure (X) shows structure of a linear polymer while (Y) shows structure of a cross-linked polymer.

Combustion is a reaction in which a substance reacts with

Atul was climbing mountain and he wondered about the strength of rope in his hand which was stronger than a steel wire. This rope would have been made up of:

An ideal fuel is cheap, readily available, easily combustible and easy to transport. It has high calorific value. It does not produce gases or residues that pollute the environment. Based on the above statements which of the following is closest to being an ideal fuel?

The least hot zone of a candle flame is

Nylon is obtained by

Fuel may be

When a cracker is ignited, a sudden reaction takes place with the evolution of heat, light and sound. Identify the type of combustion?

calcium is more reactive than iron. What will be produced when calcium sulphate and iron are mixed together?

CNG and LPG are the examples of

which non metal catches fire if kept in open

The most reactive metal is