The products of the chemical reaction between $Na_2S_2O_3$,$Cl_2$ and $H_2O$ are

In the reaction of phosphorus with concentrated $HNO_3$,the oxidized and reduced products respectively are

Assign $A$,$B$,$C$,$D$ from the given type of reaction.
$SrCrO_4 \downarrow + 2AcOH \text{ (Excess)} \longrightarrow Sr(AcO)_2 + H_2Cr_2O_7$

Assign $A$,$B$,$C$,$D$ from the given type of reaction.
$Ca(OH)_2 + CO_2 \longrightarrow CaCO_3 \downarrow + H_2O$

When $10 \, mL$ of an aqueous solution of $KMnO_{4}$ was titrated in acidic medium,an equal volume of $0.1 \, M$ aqueous solution of ferrous sulphate was required for complete discharge of colour. The strength of $KMnO_{4}$ in grams per litre is $...... \times 10^{-2}$. (Nearest integer)
[Atomic mass of $K=39, Mn=55, O=16$]

The gaseous product of the reaction between $Sn$ and conc. $H_2SO_4$ is