The mass of iron converted into $Fe_3O_4$ by the action of $18\text{ g}$ of steam is : (Given: Molar mass of $H$, $O$ and Fe are $1$, $16$ and $56\text{ g mol}^{-1}$ respectively). Assume iron is present in excess: (in $\text{ g}$)
- A$2.1$
- B$4.2$
- C$21$
- D$42$
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Match the following and select the correct option:
List-$I$ List-$II$ (At $STP$) $(A)$ $10 \ g \ CaCO_3 \xrightarrow{\Delta} \text{decomposition}$ $(i)$ $0.224 \ L \ CO_2$ $(B)$ $1.06 \ g \ Na_2CO_3 \xrightarrow{\text{Excess } HCl}$ $(ii)$ $4.48 \ L \ CO_2$ $(C)$ $2.4 \ g \ C \xrightarrow{\text{Excess } O_2} \text{combustion}$ $(iii)$ $0.448 \ L \ CO_2$ $(D)$ $0.56 \ g \ CO \xrightarrow{\text{Excess } O_2} \text{combustion}$ $(iv)$ $2.24 \ L \ CO_2$ $(v)$ $22.4 \ L \ CO_2$
| List-$I$ | List-$II$ (At $STP$) |
| $(A)$ $10 \ g \ CaCO_3 \xrightarrow{\Delta} \text{decomposition}$ | $(i)$ $0.224 \ L \ CO_2$ |
| $(B)$ $1.06 \ g \ Na_2CO_3 \xrightarrow{\text{Excess } HCl}$ | $(ii)$ $4.48 \ L \ CO_2$ |
| $(C)$ $2.4 \ g \ C \xrightarrow{\text{Excess } O_2} \text{combustion}$ | $(iii)$ $0.448 \ L \ CO_2$ |
| $(D)$ $0.56 \ g \ CO \xrightarrow{\text{Excess } O_2} \text{combustion}$ | $(iv)$ $2.24 \ L \ CO_2$ |
| $(v)$ $22.4 \ L \ CO_2$ |
The exact volumes of $1\, M\, NaOH$ solution required to neutralize $50\, mL$ of $1\, M\, H_3PO_3$ solution and $100\, mL$ of $2\, M\, H_3PO_2$ solution,respectively,are:
DifficultJEE MAIN 2021
View SolutionIn the reaction, $2Al_{(s)} + 6HCl_{(aq)} \rightarrow 2Al^{3+}_{(aq)} + 6Cl^{-}_{(aq)} + 3H_{2(g)}$, which of the following statements is correct?
DifficultJEE MAIN 2026
View SolutionHow many litres of oxygen (at $STP$) are required for complete combustion of $39 \ g$ of liquid benzene?
(Atomic weights: $C=12, O=16, H=1$)
(Atomic weights: $C=12, O=16, H=1$)
DifficultTS EAMCET 2001
View SolutionEqual masses of $H_2, O_2$ and methane have been taken in a container of volume $V$ at temperature $27 \ ^oC$ in identical conditions. The ratio of the volumes of gases $H_2 : O_2 :$ methane would be
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