s Block Elements

Which of the following substance does NOT contain $\text{CaCO}_3$?

Identify the oxide used as $\text{CO}_2$ adsorbent and oxygen generator from following?

Identify the pair of basic oxides from the following?

Which of the following compound used in petrol refining?

Which of the following elements is the radioactive alkaline earth metal?

Match List I with List II and choose correct answer from the codes given below $\begin{array}{llll}\mathrm{A} & \mathrm{B} & \mathrm{C} & \mathrm{D}\end{array}$

Beryllium shows diagonal relationship with

$\mathrm{KO}_2$ is used in space and submarines because it

When $\mathrm{CO}_2$ is passed through solution of calcium hydroxide, which one of the following compound is precipitated?

In the given reaction, the oxide of sodium is $\binom{4 \mathrm{Na}+\mathrm{O}_2 \longrightarrow 2 \mathrm{Na}_2 \mathrm{O}}{\mathrm{Na}_2 \mathrm{O}+\mathrm{H}_2 \mathrm{O} \longrightarrow 2 \mathrm{NaOH}}$

When sodium hydroxide react with sand, it form :

The activity of alkaline earth metals as reducing agent