Chemistry
Balancing a chemical equation is based on:
- Law of conservation of mass
- Mass of reactants and products
- Symbols and formulae
- None of the above
Related Questions
Write True or False for the following statements:
(a) No new substance is formed during a chemical reaction.
(b) Hydrogen sulphide has rotten egg smell.
(c) When potassium iodide solution is added to lead acetate solution, a red precipitate is formed.
(d) A black residue is formed when sugar is heated.
(e) When iron and sulphur are heated together a grey mass is formed which is attracted by a magnet.
A chemical equation is a statement that describes a chemical change in terms of:
- Symbols and formulae
- Energy
- Number of atoms
- Colours
Copper carbonate when heated turns:
- Blue
- Green
- Black
- Yellow
When lead acetate solution is added to potassium iodide solution a precipitate is formed which is:
- Red
- Yellow
- White
- Black