Modern Periodic Table and Periodic Properties — Chemistry STD 10 — Question

A strong electrolyte is one which_______.

Valency of aluminium is :

Salts of which elements are generally coloured :

Assertion : Atoms can combine either by transfer of valence of electrons from one atom to another or by sharing of valence electrons.
Reason : Sharing and transfer of valence electrons is done by atoms to have an octet in their valence shell.

But-1-ene and but-2-ene are examples of ___________ isomerism.

Assertion : Chlorine is called halogen.
Reason : It is because chlorine reacts with metals to form salts.

Potassium is the element below sodium in the long form of periodic table. The electronegativity of potassium will be:

With the increase in atomic number in a period,

Which salt solution will form a deep blue coloration when treated with excess of NH₄OH solution?