Periodic Table, Periodic Properties and Variations of Properties — Chemistry STD 10 — Question

The elements placed in the extreme right hand side group are called________(noble gases/light gases).

Higher difference in the value of ________ between the reacting atoms, leads to the formation of ionic bond. (electronegativity/electopositivity)

The type of salt formed when excess of caustic soda reacts with sulphuric acid is _______ .

When ________ is heated with conc. sulphuric acid it forms nitric acid. [potassium nitrate/potassium nitride]

Aluminium powder is a constituent of paints and prevents ________. [conduction of electric current/formation of rust/heat radiation]

The following are the typical properties of dilute acid. complete them by inserting suitable words :
Active metal + acid → ............. + ...............

The gas produced by the action of concentrated sulphuric acid on sodium chloride is _______ .

The serial number of an element in a periodic table is also its________(mass number/atomic number)

The compounds of carbon and hydrogen are called _______ .

The dehydrated product obtained when sugar reacts with conc. sulphuric acid is _______ .