The major component/ingredient of Portland Cement is:

Which of the following factors is responsible for $Li$ being the strongest reducing agent among alkali metals?

$2Na_2O \overset{400 \ ^oC}{\rightleftharpoons} A + 2Na$
$A + SO_2 \to Na_2SO_4$
$A + CO \to Na_2CO_3$
In the above reaction,$A$ is:

The metal-pair that can produce nascent hydrogen in alkaline medium is

The correct order of electrical conductivity of alkali metal ions in their aqueous solution for $Cs^{+}$, $K^{+}$, $Na^{+}$, and $Li^{+}$ is:

What is the formula of calcium cyanamide?