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प्रश्न
Which of the following statements about hydrogen is incorrect?
विकल्प
It is an inflammable gas
It is the lightest gas.
It is not easily liquefied
It is a strong oxidizing agent.
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उत्तर
It is a strong oxidizing agent.
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संबंधित प्रश्न
Explain the following in terms of gain or loss of oxygen with one example:
Reduction
State, giving reason, whether the substances printed in bold letters have been oxidized or reduced.
Mg + 2HCl → MgCl2 + H2
In the following reaction: A+ + B → A + B+. Write half-reactions for this reaction and name:
- oxidizing agent
- substance oxidized
- reducing agent
Complete and balance the following equation:
CuO +__________→ Cu +___________
State what is oxidising agent. Give an example of oxidising agent in the gaseous, liquid, and solid form.
Identify the reducing agent in the following reactions
`4"NH"_3 + 5"O"_2 -> 4"NO" + 6"H"_2"O"`
Identify the oxidising agent (oxidant) in the following reactions.
`"CuO" + "H"_2 -> "Cu" + "H"_2"O"`
During the reaction of some metals with dilute hydrochloric acid, following observations are made.
Silver metal does not show any change
Explain this observation giving suitable reason.
A silver article generally turns black when kept in the open for a few days. The article when rubbed with toothpaste again starts shining.
- Why do silver articles turn black when kept in the open for a few days? Name the phenomenon involved.
- Name the black substance formed and give its chemical formula.
Oxidizing agents are otherwise called ______.
