The number of mole present in 2 litre of 0.5 M NaOH is : Option 1) 2 Option 2) 1 Option 3) 0.1 Option 4) 0.5

As discussed in

Molarity -

Molarity (M) = (Number of moles of solute)/(volume of solution in litres)

- wherein

It is defined as the number of moles of the solute in 1 litre of the solution.

Option 1)

2

Option is incorrect

Option 2)

1

Option is correct

Option 3)

0.1

Option is incorrect

Option 4)

0.5

Option is incorrect

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That means 1litre solution we have 0.5 mole of naoh                                                                    so for 2litre solution we get

2×0.5=1mole of naoh