i) A substance W reacts with another substance X to form a compound Y with
the liberation of a gas Z that burns with a popping sound. (4+1)
a) Identify W, X, Y and Z.
b) Write a balanced chemical equation for the formation of Z from the reaction of W
with X.
ii) Name any two metals that do not react with water.
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9 types of contraception you can use to prevent pregnancy (with pictures!)
The Condom. ...
The Oral Contraceptive Pill. ...
Intrauterine Device (IUD) ...
The Contraceptive Implant. ...
The Contraceptive Injection. ...
Emergency Contraception Pill (The 'Morning After' Pill) ...
Contraceptive Ring. ...
Diaphragm.
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Answer:
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