When a metal is put in water it starts floating and some gas is evolved from it without any fire. A burning candle is put off with a pop sound when a candle is exposed to this gas. The metal can be ____ .

3.When metals react with acids, if there is a reaction then _______/effervescence is seen which is a sign a gas is being given off

Which among the following statements is incorrectfor magnesium metal?(a) It reacts with cold water to form magnesium oxide and evolves hydrogen gas(b) It burns in oxygen with a dazzling white flame(c) It reacts with steam to form magnesium hydroxide and evolves hydrogen gas.(d) It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas

An ore on burning in air, gives a gas which smells like burning sulphur. Identify the ore & write itssteps of metallurgy

Name a metal which combines with hydrogen gas. Name the compound formed.

When non-metals react with water then        A.Hydrogen gas is formed        B.Carbon dioxide gas is formed        C.Non-metals do not react with water        D.None of these.