Question

Assertion :- One molal aqueous solution of urea contains 60g of urea in 1kg (1000 g) water.
Reason :- Solution containing one mole of solute in 1000g solvent is called as one molal solution.
A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.

Answer 1

Correct Answer - A
Molecular weight of urea `(NH_(2)CONH_(2))`
`=14+2+12+16+14+2=60`
Number of moles `=("Weight")/("molecular weight")=(60)/(60)=1`