methane
hydrogen chloride
hydrogen
nitrogen
Correct answer is E
Co2 does not support combustion, it is used in fire extinguishers and when it is passed into a solution of barium hydroxide, a white precipitate of barium carbonate is formed
When a bottle of Coca-Cola is opened, bubbles of evolve. The gas is?
hydrogen
carbon monoxide
carbon dioxide
sulphur oxide
chlorine
Correct answer is C
No explanation has been provided for this answer.
An element X has 127 neutrons and 82 electrons.
Its atomic number is?
209
105
45
82
Correct answer is D
An atom that has equal number of protons and electrons is called a neutral atom.
With 82 electrons, the atomic number is also 82
Which of the following is true concerning the properties of benzene and hexane?
Both undergo substitution reaction
Both undergo addition reaction
Both are solids
Both can decolourized bromine water
Correct answer is A
Hexane and benzene can both partake in substitution reactions.
Terylene is synthesized from ethane- 1, 2-diol and benzene - 1, 4-dicarboxylic acid by?
addition reaction
condensation reaction
elimination reaction
substitution reaction
Correct answer is B
No explanation has been provided for this answer.