MCQ
Which has the maximum number of molecules among the following?
- A$44\; g\ CO_2$
- B$48\; g\ O_3$
- ✓$8\; g\ H_2$
- D$64\; g\ SO_2$
✓
Answer
Correct option: C.
$8\; g\ H_2$
c
$8 g \mathrm{H}_2=4 \mathrm{moles}$
$8 g \mathrm{H}_2=4 \mathrm{moles}$
$64 g$ $SO_2=1$ mole
$44 \mathrm{g} \mathrm{CO}_2=1 \mathrm{mole}$
$48 \mathrm{g} O_2=48 / 32=1.5 \mathrm{mole}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Select incorrect statement
The pairs of bases in $DNA$ are held together by
→In the following reaction $C{r_2}O_7^ - + 14{H^ + } + 6{I^ - } \to \,$$2C{r^{3 + }} + 3{H_2}O + 3{I_2}$ Which element is reduced
→$K_{sp}$ of $M(OH)_2$ is $3.2\times10^{-11}$. The $pH$ of saturated solution in water is
→The surface of copper gets tarnished by the formation of copper oxide. $N _2$ gas was passed to prevent the oxide formation during heating of copper at $1250 K$. However, the $N _2$ gas contains $1$ mole $\%$ of water vapour as impurity. The water vapour oxidises copper as per the reaction given below:
→$2 Cu ( s )+ H _2 O ( g ) \longrightarrow Cu _2 O ( s )+ H _2( g )$
$P _{ H _2}$ is the minimum partial pressure of $H _2$ (in bar) needed to prevent the oxidation at $1250 K$. The value of $\ln \left( p _{ H _2}\right)$ is. . . . .
(Given: total pressure $=1$ bar, $R$ (universal gas constant) $=8 JK ^{-1} mol ^{-1}, \ln (10)=2.3$. $Cu ( s )$ and $Cu _2 O ( s )$ are mutually immiscible.
At $1250 K : 2 Cu ( s )+1 / 2 O _2( g ) \longrightarrow Cu _2 O ( s ) ; \Delta G ^\theta=-78,000 J mol ^{-1}$
$H _2( g )+1 / 2 O _2( g ) \longrightarrow H _2 O ( g ) ; \Delta G ^\theta=-1,78,000 J mol ^{-1} ; G$ is the Gibbs energy)
$HgCl_2$ and $I_2$ both when dissolved in water containing $I^-$ ions, the pair of species formed is
→Which of the following $0.1\,M$ solution will contain the largest concentration of hydronium ions
→The disappearance of the characteristic purple colour of $KMn{O_4}$ in its reaction with an alkene is the test for unsaturation. It is known as
→$I.U.P.A.C.$ name of above compound
→Comproportionation occurs between