LANGUAGES OF CHEMISTRY

Which of the following is not the symbol of any element?

• S

• T

• U

• V

The element cobalt is represented by the following symbol :

• Co

• CO

• Cb

• Cob

Name the elements present in ammonia

(a)  

A chemical equation does not provide information about

• Reactants

• Products

• Mol of reactants and products

• Rate of reaction

What is the name of Na₂S₂O₃?

• Sodium sulphate

• Disodiumsulphideoxide

• Sodium thiosulphate

• Sodium disulphide

What are the products of a neutralisation reaction?

• Salt and water

• Salt and hydrogen gas

• Salt and oxygen gas

• Water

Positively-charged particles in an atom are

• Electrons

• Protons

• Neutrons

• Neurons

Name one of the states of matter water can be found in :

(a)  

What is the formula of iron(III) hydroxide?

(a)  

___ PbO + ____ NH₃ -----> ____ Pb + ____ H₂O + N₂. Balance this equation. Select the numbers in correct order as in question

• 3, 2, 3, 3

• 3, 1 , 2 , 2

• 3,1, 3, 3

• 2, 3, 2, 3