Advertisements
Advertisements
Question
Complete and balance the following reaction.
Zn + HCl →_____________ +___________
Advertisements
Solution
Zn + 2HCl → ZnCl2 + H2
APPEARS IN
RELATED QUESTIONS
Match the statements in Column A with those in Column B.
| Column A | Column B |
|
1. A metal which reacts with cold water to from hydrogen. |
1. Reduction |
| 2. A gas which is inflammable and non-supporter of combustion | 2. Hydrogenation |
|
3. A process in which vanspati ghee is prepared from vegitable oils |
3. oxidation |
|
4. The removal ofhydrogen or addition of oxygen |
4. sodium |
| 5. The addition of hydrogen or removal of oxygen | 5. Hydrogen |
FILL IN THE BLANK
........................... means ‘maker of water’ in Greek.
FILL IN THE BLANK
In electrolysis of water, dilute sulphuric acid is added to increase ..................of water.
Hydrogen gas is collected by the downward displacement of water. Give reason ?
Choose the correct option:
Elements which show unique nature in the preparation of hydrogen are:
Why are the following metals not used in the lab preparation of hydrogen?
calcium
Complete and balance the equation:
[General method]
Reactions of active metals - cold water
Potassium- K + H2O → ______+ ______ [g]
Complete and balance the equation:
[General method]
Reactions of active metals - cold water
Calcium - Ca + H2O → ______+ _______ [g]
Name an element whsich reacts violently with water at room temperature.
How did the name ‘hydrogen’ originate? How does hydrogen occur in the combined state?
