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

Bronze used for making bells and gongs is essentially an alloy of copper and tin.

Sodium is the metal that reacts with oxygen and water vigorously.

Arrangement of metal in decreasing order of reactivity are

Sodium > Magnesium > Zinc > Iron > Copper

The metals at the bottom of the activity series are the least reactive. They are often found in a free state. For example, gold, silver, platinum and copper are found in the free state.

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.

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.

Corrosion can be defined as the degradation of a material due to a reaction with its environment. Thus, Option D is correct.

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.

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.

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.

There is the total of 118 elements that exist in the modern periodic table. Out of these, the maximum number is of metals which include 95 metals followed by the seventeen non-metal—the other six accounts for the Metalloids like Silicon, Arsenic, Boron, etc.

Aluminium reacts with HNO₃ to form a layer of AI₂O₃ which decreases the reactivity of aluminium.

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.

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

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

Malleability, ductility, high conductivity are the various atomic characteristics of metals. Electronic configuration, valency, and reducing nature are the properties that determine the chemical properties of metals.

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.

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.

Silver articles get tarnished by reacting with atmospheric air to form black coating of silver sulphide.

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.