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प्रश्न
Name a black metallic oxide which reacts with hydrochloric acid to give a coloured solution.
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उत्तर
Manganese dioxide
संबंधित प्रश्न
Name two gases which chemically combine to form a liquid.
Complete and balance the following reaction, state whether dilute or conc. acid is used.
\[\ce{NaHSO3 + HCl ->}\]
Complete and balance the following reaction, state whether dilute or conc. acid is used.
\[\ce{Pb(NO3)2 + HCl ->}\]
Complete and balance the following reaction, state whether dilute or conc. acid is used.
\[\ce{Pb3O4 + HCl ->}\]
Complete the following reaction and balance them.
Zn+ 2HCl ⟶
Calcium oxide and phosphorous pentoxide are very good drying agents but they are not used to dry HCI gas. Give reasons for each.
Convert Hydrochloric acid to nascent chlorine.
Complete and balance the following reaction, state whether dilute or cone. acid is used.
\[\ce{NH4OH + HCl->}\]
Complete and balance the following reaction, state whether dilute or conc. acid is used.
NH4OH + HCl ⟶
Study the flow chart and give balanced equations with conditions for the conversions A, B, C, D and E.
