| Assertion: One molal aqueous solution of urea contains 60 g of urea in 1 kg of water. |
| Reason: Solution containing one mole of solute in 1000 g solvent is called one molal solution. |
A) Assertion and reason both are correct statements and reason is correct explanation for assertion.
B) Assertion and reason both are correct statements but reason is not correct explanation for assertion.
C) Assertion is correct statement but reason is wrong statement.
D) Assertion is wrong statement but reason is correct statement.
Correct Answer: A
Solution :
Molecular weight of urea \[\left( N{{H}_{2}}CON{{H}_{2}} \right)\] \[=14+2+12+16+14-1-2=60\] Number of moles \[=\frac{Weight}{Molecular\,weight}=\frac{60}{60}=1\] \[m=\frac{No.\,of\,moles\,of\,solute}{Mass\,of\,solvent\,in\,kg}=\frac{1\,mol}{1\,kg}=1m\]
You need to login to perform this action.
You will be redirected in
3 sec
