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प्रश्न
Write balanced equation for the following reaction:
magnesium + dil. hydrochloric acid → ___
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उत्तर
Mg + 2HCl (dil.) → MgCl2 + H2
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संबंधित प्रश्न
Complete and balance the following equation:
H2+____________→ 2HCI
Define catalytic hydrogenation.
Multiple Choice Question
Hydrogen is
MULTIPLE CHOICE QUESTIONS
Which is the lightest of all elements?
- hydrogen
- helium
- lithium
- none of these
FILL IN THE BLANK
In nature, hydrogen occurs as a .................. molecule represented as H2
FILL IN THE BLANK
Hydrogen is present abundantly in the ................
Why is hydrogen called a reducing agent? Give chemical equation to support your answer ?
Give the balanced equation of the reaction.
Choose the correct option:
The composition of the nucleus of deuterium is
Choose terms from the options given in brackets to complete this sentence.
A metal …………….. hydrogen in the activity series gives hydrogen with …………… acid or …………… acid.
(above, below, dilute hydrochloric, concentrated hydrochloric, dilute sulphuric).
Correct the following statement:
Hydrogen is dried by passing it through conc. H2SO4.
With reference to the equation : Cl2 + H2S → 2HCl + S pertaining to a redox reaction – select the correct answer.
Chlorine acts as an ______ agent.
Give balanced equation for the following conversion:
Nitrogen to a basic gas – using hydrogen.
Give reason for the following:
The reaction of chlorine with hydrogen sulphide is deemed a redox reaction.
Match the statements in List I with the appropriate answer in List II.
| List I | List II |
| 1. An atom of hydrogen | A: Chromic oxide |
| 2. A strong oxidising agent | B: Ammonia |
| 3. A promoter used in Bosch process | C: Iron |
| 4. A chemical used in the manufavture of fertilizers | D: One electron |
| 5. The catalyst used in production of a basic gas from nitrogen. | E: Dilute nitric acid |
Give a chemical test to distinguish between the following gases:
Hydrogen and oxygen
When steam is passed over red-hot iron, magnetic oxide of iron and hydrogen are obtained. “The reaction between steam and red-hot iron is a Reversible Reaction.” What is meant by this statement.
Explain the following:
Two jars of H2 are collected – “one burns quietly and the other does not”.
Complete and balance the following equations:
Al + NaOH + ____ → ____ + ____
Select the correct answer from the symbol in the bracket.
The element, which like hydrogen has one valence electron.
