CBSE · Chemistry
s Block Elements
217 practice questions for CBSE — 177 easy · 40 medium · 0 hard. Every question is graded instantly with a step-by-step solution when you miss it.
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MCQ
Identify the oxide used as $\text{CO}_2$ adsorbent and oxygen generator from following?
MCQ
Which of the following elements is the radioactive alkaline earth metal?
MCQ
Identify the pair of basic oxides from the following?
MCQ
Which of the following compound used in petrol refining?
MCQ
Which of the following substance does NOT contain $\text{CaCO}_3$?
MCQ
Heating chloroform with aqueous sodium hydroxide solution forms
MCQ
$\mathrm{KO}_2$, reacts with water to form $A, B$ and $C$. $B$ forms $C$ when it reacts with iodine in basic medium. What are $B$ and $C$ respectively?
MCQ
Match the following
MCQ
Match the following.
MCQ
$\mathrm{CaCO}_3$ was reacted with dil $\mathrm{HCl}$ to form three products. One of the products formed, when passed into slaked lime gave $\mathrm{X}$. What is $\mathrm{X}$ ?
MCQ
The colour of $\mathrm{Mg}(\mathrm{OH})_2$ precipitate formed when it is precipitated in the presence of magneson reagent is
MCQ
Observe the following reactions Dimer $\stackrel{\text { Vapour phase }}{\longleftarrow} \mathrm{MCl}_2 \stackrel{1200 \mathrm{~K}}{\longrightarrow}$ linear monomer. What is M?