When air which contains the gases: oxygen, nitrogen, carbon dioxide, water vapour and the rare gases, is passed through alkaline pyrogallol and then over quicklime, the only gases left are:
Nitrogen and carbondioxide
The rare gases
Nitrogen and oxygen
Nitrogen and the rare gases
A substance that is used as a ripening agent for fruits is
Ethene
Propane
Methane
Butane
Halogens generally react with metals to form
Alkalis
Acids
Bases
Salts
Which of the following statements is correct?
Covalent compounds would readily ionize in solution
Covalent compounds consist of ions
Hydrogen bond is formed between a metal and a non-metal
Ionic compounds in solution would conduct electriity
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