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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
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संबंधित प्रश्न
Give reason for the following:
silver nitrate solution can be used to distinguish HCl from HNO3
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 ⟶
Distinguish between the following pairs of compounds using the reagent given in the bracket.
Mangenese dioxide and copper (II) oxide. (using concentrated HCl)
Choose the correct answer from the options given below:
Which of the following statement is not correct ?
How will you identify?
Chloride ion
A solution of hydrogen chloride in water is prepared. The following substances are added to separate portions of the solution:
| S. No. | Substances added | Gas evolved | Odour |
| 1. | Calcium carbonate | _________ | _________ |
| 2. | Magnesium ribbon | _________ | _________ |
| 3. | Manganese (IV) oxide with heating | _________ | _________ |
| 4. | Sodium sulphide | _________ | _________ |
Complete and balance the following reaction, state whether dilute or conc. acid is used.
\[\ce{NH4OH + HCl->}\]
Complete and balance the following reaction; state whether it is dilute or cone. acid is used.
\[\ce{NH_4OH + HCl ->}\]
Study the flow chart and give balanced equations with conditions for the conversions A, B, C, D and E.
