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WB JEE

Some s Block Elements

Chemistry

Previous Years Questions

MCQ (More than One Correct Answer)

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

MCQ (Single Correct Answer)

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To a solution of colourless sodium salt, a solution of lead nitrate was added to have a white precipitate which dissolve...
WB JEE 2022
A sample of MgCO3 is dissolved in dil. HCl and the solution is neutralized with ammonia and buffered with NH4Cl / NH4OH....
WB JEE 2022
The white precipitate (Y), obtained on passing colorless and odourless gas (X) through an ammoniacal solution of NaCl, l...
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
In the extraction of Ca by electro reduction of molten CaCl2 some CaF2 is added to the electrolyte for the following rea...
WB JEE 2020
The reactive species in chlorine bleach is
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
Which of the following is least thermally stable?
WB JEE 2018
Which of the following solutions will turn violet when a drop of lime juice is added to it?
WB JEE 2017

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