Model questions for Class XI NEB Chemistry Exam 2077Time: 3 hours F.M.: 75 P.M.: 27Group-A (Very short questions)Attempt any fifteen questions: 15 x 2 = 301. State law of equivalent proportions. 22. A divalent metal oxide contains 60% of metal. What is atomic weight of metal? 1+13. ...
A divalent metal oxide contains 60% of metal. What is atomic weight of metal?
Let, wt, of metal oxide be 100 g
wt of metal= 60 g
wt of oxygen= (100-60) g= 40 g
Eq. wt. of metal = wt. of metal/ wt of oxygen* 8
As metal is divalent, At. wt= Eq. wt* valency= 12*2 = 24