Test: Metals And Non-metals (Hard) - Class 10 MCQ

The most abundant metals are 8.1% of aluminium, 5.0% of iron and 3.6% of calcium, followed closely by Na, K, Mg and Ti.

Zinc is a non-ductile and non-malleable metal.

As per the reactivity series, Copper falls below Hydrogen, which means its activity is lower than that of hydrogen, so it cannot displace hydrogen from hydrochloric acid.

Sodium is the soft silvery metal at standard temperature and pressure. It can be readily cut with a knife as it is very soft. When freshly cut sodium has a bright silvery luster.

The metals in the middle of the activity series (Zn, Fe, Pb, etc.) are moderately reactive. They are found in the earth's crust mainly as oxides, sulphides or carbonates. Thus, option B is correct.

The metal is Rb.

Rb + O₂(excess) → RbO₂

Here product X is RbO₂.

2RbO₂ + 2H₂O → 2RbOH + H₂O₂ + O₂.

Iron combusts in oxygen to form various iron oxides, mainly iron(III) oxide: 4 Fe (s) + 3 O₂ (g) ==> 2 Fe₂O₃ (s) Iron in its usual bulk solid form will only burn when in pure oxygen with when a great deal of heat is supplied.

Zinc is a non-ductile and non-malleable metal.

Potassium which is present towards the top of the reactivity series are highly reactive metals as they can displace metals present below.

As per the reactivity series, Copper falls below Hydrogen, which means its activity is lower than that of hydrogen, so it cannot displace hydrogen from hydrochloric acid.

Sodium is the metal that reacts oxygen and water vigorously.

The first most common element to be found in the universe is Hydrogen and The second most common element to be found in the universe is Helium.

Metals have a higher melting point than nonmetals. So, Gold will have a higher melting point as it is a metal.

Iron, when exposed to moist air for a long time, acquires a coating of a brown flaky substance called rust. Thus, Option C is correct.

Principle involved in the froth floatation method is the difference in the wetting properties of the ore and the gangue particles. The sulphide ore particles are preferentially wetted by oil while gangue particles are preferentially wetted by water.

The first most common element to be found in the universe is Hydrogen and The second most common element to be found in the universe is Helium.

Option 2 : Mica

As per the reactivity series, Copper falls below Hydrogen, which means its activity is lower than that of hydrogen, so it cannot displace hydrogen from hydrochloric acid.

Metals form cations by losing electrons. The molecule of metals in the vapour state is generally monoatomic. Nonmetals form anions (negative ions) by gaining electrons to complete their octet. Their molecules are usually polyatomic in the gaseous state.

Neoprene is a synthetic polymer which resembles natural rubber, and it is resistant to oil, heat and weathering.