Chemistry
Number of6.023 × 1020 atoms present in one mole of a gas at STP is

'6.023 × 10–23
'6.023 × 10–20
6.023 × 1023
6.023 × 1020

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Chemistry
An oxidising agent is a

An electron donor
An electron acceptor
It releases H2 in a chemical reaction
In a chemical reaction its oxidation number increases

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