MCQ
Sodium thiosulphate is formed when
  • A
    $SO_2$ is boiled into $Na_2S$
  • B
    $Na_2SO_3$ is boiled with elemental sulphur
  • C
    $H_2S_2O_3$ is neutralised by $NaOH$
  • Both $(B)$ and $(C)$

Answer

Correct option: D.
Both $(B)$ and $(C)$
d
Disulfuric acid or pyrosulfuric acid is an oxoacid of sulphur It is a major constituent of fuming sulfuric acid, oleum and its chemical formula is $H _2 S _2 O _7$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Which of the following molecular species is not linear ?
$CH_3 -CH_2 -CH_2 -Cl$ $\xrightarrow[{Na}]{{Dry\,\,ether}}$ $P$ $\xrightarrow[\Delta ]{{{V_2}{O_5},A{l_2}{O_3}}}$ $Q$, $Q$ is
Arrange the acids $  (I) $ ${H_2}S{O_3}$ $ (II) H_3PO_3 $ and $(III) HClO_3 $ in the decreasing order of acidity
Given below are two statements:
Statement I: In group 13, the stability of +1 oxidation state increases down the group.
Statement II: The atomic size of gallium is greater than that of aluminium.
In the light of the above statements, choose the most appropriate answer from the options given below:
The compound($s$) with $TWO$ lone pairs of electrons on the central atom is(are)

($A$) $\mathrm{BrF}_5$ ($B$) $\mathrm{ClF}_3$ ($C$) $\mathrm{XeF}_4$  ($D$) $\mathrm{SF}_4$

carbon-carbon double bond length will be maximum in which of the following compounds ?
The equivalent conductance of $M/32$ solution of a weak monobasic acid is $8.0\, mho\, cm^2$ and at infinite dilution is $400\ mho\ cm^2.$ The dissociation constant of this acid is
$0.01\,M$ solution of $KCl$ and $BaCl_2$ are prepared in water. The freezing point of $KCl$ is found to be $-\,2\,^oC$. What is the freezing point of $BaCl_2$ to be completely ionised ? ............. $^o \mathrm{C}$
In a conductometric titration, small volume of titrant of higher concentration is added stepwise to a larger volume of titrate of much lower concentration, and the conductance is measured after each addition.

The limiting ionic conductivity ( $\Lambda 0$ ) values (in $mS m ^2 mol ^{-1}$ ) for different ions in aqueous solutions are given below:

Ions $Ag ^{+}$ $K ^{+}$ $Na ^{+}$ $H ^{+}$ $NO _3^{-}$ $CI ^{-}$ $SO _4^{2-}$ $OH ^{-}$ $CH_3COO ^{-}$
$\Lambda_0$ $6.2$ $7.4$ $5.0$ $35.0$ $7.2$ $7.6$ $16.0$ $19.9$ $4.1$

For different combinations of titrates and titrants given in $List-l$, the graphs of 'conductance' versus 'volume of titrant' are given in $List-II$.

Match each entry in $List-I$ with the appropriate entry in $List-II$ and choose the correct option.

The effect of increasing the pressure on the equilibrium $2A + 3B$ $\rightleftharpoons$ $3A + 2B$ is