Which of the following is a chemical reaction?

What is formed when magnesium ribbon burns in air?

Which gas is released when an acid reacts with a metal?

The chemical reaction in which heat is released is called:

Photosynthesis is an example of which type of reaction?

Which of the following indicates that a chemical reaction has taken place?

The reaction between an acid and a base produces:

What type of reaction is respiration?

Which type of reaction takes place when silver chloride turns grey in sunlight?

Which chemical is used in black and white photography?