NCERT Exemplar XII — task. Science CBSE, Class 10.

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1. Which among the following statements is incorrect for magnesium metal?

It burns in oxygen with a dazzling white flame.
It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas.
It reacts with cold water to form magnesium oxide and evolves.
It reacts with steam to form magnesium hydroxide and evolves hydrogen gas.

2. Which among the following alloys contain mercury as one of its constituents?

Alnico
Zinc amalgam
Solder
Stainless steel

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