1.

MnO_(2) and H_(2)SO_(4) added to NaCl, the greenish yellow gas liberated is

Answer»

`Cl_(2)`
`NH_(3)`
`N_(2)`
`H_(2)`

Solution :Yellowish-green gas (chlorine) with suffocating odour is evolved when the sodium chloride mixed with manganese dioxide is HEATED with concentrated `H_(2)SO_(4)`.
`NaCl+H_(2)SO_(4)toNaHSO_(4)+HCl`
`MnO_(2)+4HCL toMnCl_(2)+2H_(2)O+Cl_(2)`


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