1 mole of water vapor is condensed to liquid at 25°C. Now this water contains:
(i) 3 moles of atoms
(ii) 1 mole of hydrogen molecule
(iii) 10 moles of electrons
(iv) 16 g of oxygen
The correct combination is:

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(i) and (ii)

(i) and (iii)

All are correct

(i) and (iv)

answer is D.

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Detailed Solution

One mole of water is made up of two hydrogen atoms and one oxygen atom. Therefore, it can be said that 1 mole of water contains 3 moles of atoms. This means that statement-1 is correct.
Two hydrogen atoms combine to form one mole of hydrogen molecule. That is, one mole of water is made up of one mole of hydrogen molecule. This means that statement-2 is correct.
The number of moles of electrons in a hydrogen molecule and an oxygen atom is 2 and 8, respectively. Therefore, there are 10 moles of electrons in a single mole of water. This means that statement-3 is correct.
The atomic mass of an oxygen atom is 16 g. This means that statement-4 is correct.

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