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Which one of the following metals burns, if kept in air?

Which one of the following gases burn with pop sound?

Which one of the following metals is not a mineral?

Which one of the following non-metals is liquid?

Which scientist discovered the radioactive element radium?

The gas used in artificial ripening of green fruits is

Ozone is

Brine' is

16 g N₂

The No. of atoms = $\frac{Given mass}{molar mass}$ $\times$ Avogadro number(N_o)

No. of atoms in 16 g N₂= $\frac{16}{28} \times$ N_o=0.57N_o

No. of atoms in 16 g CO₂= $\frac{16}{44} \times$ N_o=0.36N_o

No. of atoms in 16 g CH₄= $\frac{16}{16} \times$ N_o=N_o

No. of atoms in 16 g O₂= $\frac{16}{16} \times$ N_o=N_o

Hence,16 g of N₂ has the maximum number of atoms.

10.

In laboratory, ethylene and acetylene can be distinguished by