9th Class Chemistry Chapter 4 Online MCQ Test With Answers PDF English Medium (Structure of Molecules)

Chemistry 9th Class English Medium Unit 4 Online Test

Sr. #	Questions	Answers Choice
1	Which one of the following compounds will hae the highest percentage of the mass of nitrogen?	N2H4 CO (NH2)2 NH3 NH2OH
2	What is the mass of AI in 204 g of aluminium oxide Al₂O₃	26 g 54 g 108 g 27 g
3	A nceklaee has 6 g of diamonds in it . What are the numberof carbon atoms in it?	3.01 x 10<sup>23</sup> 1.003 x 10<sup>23</sup> 12.04 x 10<sup>23</sup> 6.02 x 10<sup>23</sup>
4	How many moles are there in 25 g of H₂SO₄?	0.765 Moles 0.255 moles 0.4 moles 0.51 moles
5	How many atoic mass units (amu) are there in one gram.	1 amu 6.022 x 10<sup>23</sup> 10 amu 6.022 x 10<sup>22</sup>
6	Which is the correct formula of calcium phosphide.	CaP Ca<sub>3</sub>P<sub>2</sub> CaP<sub>2</sub> Ca<sub>2</sub>P<sub>3</sub>
7	How many atoms are present in one gram of H2O?	1002 x 10<sup>23</sup> atom 6.022 x 10<sup>23</sup>atom 0.334 x 10<sup>23</sup>atom 2.004 x 10<sup>23</sup>atom