Chemistry - 9 Chapter - 2
Chemical combination and Chemical Equations
Test - 11


1. The mass of one Mole of Oxygen and one Mole of Hydrogen atoms/molecules is the same.


2. The Molar Mass of Hydrogen atoms refers to the mass of one Mole of Hydrogen ___________.




3. Molar Mass of Hydrogen atoms are 1.008g and that of molecules is?


4. In a chemical equation reactants and products are separated by _______?



5. A chemical equation must obey the law of ________




6. To balance a chemical equation, coefficients are inserted with ___?




7. While balancing a chemical equation chemical formulas of elements and compounds can be changed.


8. What are co-efficients of chemical equation in (2H2S(g)+SO2(g) ------> 2H2 O (1) + 3S(s)



9. A chemical equation is first balanced by______?



10. In balancing chemical equation, inspection method and trial and error method is one and the same.


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