Some s Block Elements · Chemistry · WB JEE

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MCQ (Single Correct Answer)

WB JEE 2023
Na$$_2$$CO$$_3$$ is prepared by Solvay process but K$$_2$$CO$$_3$$ cannot be prepared by the same because
WB JEE 2022
A sample of MgCO3 is dissolved in dil. HCl and the solution is neutralized with ammonia and buffered with NH4Cl / NH4OH. Disodium hydrogen phosphate r...
WB JEE 2022
To a solution of colourless sodium salt, a solution of lead nitrate was added to have a white precipitate which dissolves in warm water and reprecipit...
WB JEE 2021
Indicate the products (X) and (Y) in the following reactionsNa2S + nS(n = 1 $$-$$ 8) $$\to$$ (X)Na2SO3 + S $$\to$$ (Y)...
WB JEE 2021
The white precipitate (Y), obtained on passing colorless and odourless gas (X) through an ammoniacal solution of NaCl, losses about 37% of its weight ...
WB JEE 2020
In the extraction of Ca by electro reduction of molten CaCl2 some CaF2 is added to the electrolyte for the following reason :
WB JEE 2019
The compound, which evolves carbon dioxide on treatment with aqueous solution of sodium bicarbonate at 25$$^\circ$$C, is
WB JEE 2019
The reactive species in chlorine bleach is
WB JEE 2018
Which of the following is least thermally stable?
WB JEE 2017
Which of the following solutions will turn violet when a drop of lime juice is added to it?

MCQ (More than One Correct Answer)

WB JEE 2022
The correct statement(s) about B2H6 is /are :
WB JEE 2017
During electrolysis of molten NaCl, some water was added. What will happen?
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