IGCSE O Level Chemistry Practice Test 137

Periodic Table: O Level Chemistry Quiz Questions and Answers PDF Download - 137

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Periodic Table: O Level Chemistry Questions and Answers PDF Download: MCQ 137

MCQ 681:

The same number of shells are found in elements of

same group
same period
same type
same mass number

MCQ 682:

What is true about hydroxonium ions (H₃O⁺)?

they can only exist in water
they are lesser ionic
they are highly covalent
none of above

MCQ 683:

Examples of conductors include

mercury
Diamond
sulphur
phosphorus

MCQ 684:

Acids react with metal carbonates to form

salt, water, hydrogen gas
salt, water, CO₂
salt and gas only
salt and water only

MCQ 685:

Electrolysis can be useful for

electroplating
electro refining
electro coating
none of above

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