Enfant India English School
Sub:- Sci-2
Std:- 9th
Marks:- 10
First Unit Test Examination
Q.no.1 Gives Example (4M)
a) Positive Radicals
b) Basic Radicals
c) Composite Radicals
d) Trivalent Radicals
Q.no.2 Solve any Three . (6M
a) write symbols of the following elements.
mercury, Chlorine, Nitrogen, Potassium
b) Explain how the Elements Sodium is monovalent.
c) Explain with example what is meants by a moles of a substance.
d) write the name of the following compounds.
Na2SO4, K2CO3, CO2, Mgcl2
