MolSynapsequestion bank

MolSynapse / Question bank / s-Block Elements / Important compounds: NaOH, Na2CO3, NaHCO3, CaO, CaCO3, plaster of Paris

JEE Advanced levelOne or more correct optionsDifficulty 3 of 3sb214

Chlorine reacts with aqueous sodium hydroxide. Which of the following statements are correct?

AChlorine undergoes disproportionation in both reactions.
BHot concentrated $NaOH$ gives $NaCl$ and $NaClO X_{3}$ .
CPer mole of $Cl X_{2}$ , the hot concentrated reaction consumes more $NaOH$ than the cold dilute reaction.
DCold dilute $NaOH$ gives $NaCl$ and $NaOCl$ .

Answer: A, B, D

Cold:

Cl X_{2} + 2 NaOH NaCl + NaOCl + H X_{2} O

; hot:

3 Cl X_{2} + 6 NaOH 5 NaCl + NaClO X_{3} + 3 H X_{2} O

. Chlorine goes from 0 to

- 1

and

+ 1

or

+ 5

, so it disproportionates in both. NaOH used per mole of

Cl X_{2}

is 2 in both (

6/3 = 2

), so the last statement is false.

Practice s-Block Elements More on Important compounds: NaOH, Na2CO3, NaHCO3, CaO, CaCO3, plaster of Paris

Previous questionNext question

More questions on Important compounds: NaOH, Na2CO3, NaHCO3, CaO, CaCO3, plaster of Paris

Which of the following correctly gives the order of thermal stability of the group 2 carbonates together with the reason? JEE Advanced level
In the Solvay process with complete recycling of NH3 and CO2, the mass of CaCl2 formed as by-product for every 106 g of Na2CO3 produced is (... JEE Advanced level
In a Solvay plant all the CO2 obtained by calcining NaHCO3 is recycled, the rest of the CO2 comes from limestone (85.0% CaCO3 by mass, impur... JEE Advanced level
Which of the following statements about the Solvay process are correct? JEE Advanced level
Which of the following statements about plaster of Paris are correct? JEE Advanced level
Which of the following conversions can be achieved in a single step? JEE Advanced level