Medium
If one liter of air is repeatedly passed over heated copper and magnesium until no further reduction in volume occurs,the final volume of the air will be approximately ......... $mL$.
- A$800$
- B$200$
- C$10$
- D$0$
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Who is called the father of chemistry?
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View SolutionMatch List-$I$ with List-$II$ and select the correct option (Based on mole concept): List-$I$ List-$II$ $(a)$ $2 \text{ moles of ethene}$ $(i)$ $11.2 \text{ L volume at STP}$ $(b)$ $\text{Molar mass is equal to } 66 \text{ g}$ $(ii)$ $56 \text{ g}$ $(c)$ $1 \text{ g of } H_2$ $(iii)$ $12.04 \times 10^{23} \text{ molecules}$ $(d)$ $2 \text{ moles of water vapours}$ $(iv)$ $1.5 \text{ mole of } CO_2$
| List-$I$ | List-$II$ |
| $(a)$ $2 \text{ moles of ethene}$ | $(i)$ $11.2 \text{ L volume at STP}$ |
| $(b)$ $\text{Molar mass is equal to } 66 \text{ g}$ | $(ii)$ $56 \text{ g}$ |
| $(c)$ $1 \text{ g of } H_2$ | $(iii)$ $12.04 \times 10^{23} \text{ molecules}$ |
| $(d)$ $2 \text{ moles of water vapours}$ | $(iv)$ $1.5 \text{ mole of } CO_2$ |
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View SolutionNitrogen atom has an atomic number of $7$ and oxygen has an atomic number of $8$. The total number of electrons in a nitrate ion $(NO_3^-)$ will be:
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