Reactions of metals with oxygen, water & dilute acids

When a metal reacts with oxygen, which substance will be formed in this reaction?

• Metal hydroxide

• metal oxide

• metal carbide

• metal hydride

When metal reacts with cold water (at room temperature), which substances should be formed?

• metal oxide + hydrogen

• metal hydroxide + hydrogen

• metal carbide + hydrogen

• metal hydride + hydrogen

When a metal reacts with steam (hot water), which substances will be formed?

• Metal oxide + hydrogen

• metal carbide + hydrogen

• metal hydroxide + hydrogen

• metal hydride + hydrogen

How can we identify the presence of hydrogen gas in a chemical reaction?

• relighting the splint

• sqeaky pop sound

• cloudy appearance of lime water

When a metal reacts with dilute acid, which substances will be formed?

• metal oxide + hydrogen

• metal hydroxide + hydrogen

• salt + hydrogen

• metal carbide + hydrogen

how can we compare the reactivity of metals when the metals reacts with dilute acid?

• from the extents of bubbles formation of hydrogen

• from the extents of bubbles formation of oxygen

• from the extents of bubbles formation of carbondioxide