Chemistry
Name the following
- A metal below iron but above copper in the activity series of metals which has no reaction with water.
- A metal which cannot be used for the preparation of hydrogen using dilute acids.
- The salt formed when aluminium reacts with potassium hydroxide, during the preparation of hydrogen from alkalis.
- A gaseous reducing agent which is basic in nature.
- A compound formed between hydrogen and an element from group 17 [VIIA] – period 3.
Hydrogen
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Answer
- Lead [Pb]
- Lead [Pb]
- Potassium aluminate [KAlO2]
- Ammonia [NH3]
- Element from group 17 [VIIA] – period 3 is Cl and compound formed is - HCl
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Related Questions
Give reasons for the following:
Hydrogen is collected by the downward displacement of water and not air even though it is lighter than air.
Give reasons for the following:
A mixture of hydrogen and chlorine can be separated by passage through a porous pot.
Select the correct answer from the symbols in bracket.
- The element placed below hydrogen in group 1 [IA]. [Na, Li, K, F],
- The element other than hydrogen, which forms a molecule containing a single covalent bond. [Cl, N, O]
- The element, which like hydrogen has one valence electron. [He, Na, F, O]
- The element, which like hydrogen is a strong reducing agent. [Pb, Na, S, Cl]
- The element which forms a diatomic molecule. [C, Br, S, P]
The diagram represents the preparation & collection of hydrogen by a standard laboratory method.
- State what is added through the thistle funnel 'Y'.
- State what difference will be seen if pure zinc is added in the distillation flask 'X' instead of granulated zinc.
- Name a solution which absorbs the impurity – H2S.
- State why hydrogen is collected after all the air in the apparatus is allowed to escape.
- Name a gas other than hydrogen collected by the same method.