METALS AND NON-METALS FACTS

21. Which of the following metals catch fire on reaction with air?

• A. Magnesium

• B. Manganese

• C. Potassium

• D. Calcium

22. When MgO is dissolved in water, Mg(OH)2 is obtained. The solution thus obtained is ___ in nature.

• A. amphoteric

• B. alkaline

• C. neutral

• D. acidic

A reaction in which a more reactive metal replaces a less reactive metal from its salt solution is called a/an (a)   reaction.

Identify the non-metal which exists in a liquid state in room temperature

• A. Aluminium

• B. Mercury

• C. Iodine

• D. Bromine

Which of the following pairs of compounds undergo displacement reaction when they react with each other?

• A. Cu and AgNO3 solution

• B. Ag and FeSO4 solution

• C. Cu and NaCl solution

• D. Mg and NaCl solution

Which is hardest among these options -- (the answer may vary)

• DIAMOND

• GOLD

• TUNGSTEN

Metals are ___1___ , ____2____ and non-metals are _____3_____ and_____4_____.

(write in commas in order using any two properties of both metals and non-metals)

(a)