Question

Find the odd one out. Give scientific reasons for your answer.
1. Sodium, potassium, calcium, iron
2. Lightest element, poisonous, tasteless, colourless
3. Magnesium, sodium, silver, hydrogen
4. Oxidising agent, reducing agent hydrogenation, redox​

Answer 1

Answer:

First one will be by iron as rest three are alkali metals .

Second one will be poisonous as it is not a property of hydrogen and the rest are a property of Hydrogen .

Third one will be hydrogen as it is a non metal and the rest are metal .

Hydrogenation is the odd one out for the last one . Oxidising agent, reducing agent these are included under redox reaction but hydrogenation has no relation with oxidation, reduction or redox reaction .

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