Chemistry 9th Class English Medium Online Test With Answers

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Chemistry 9th Class English Medium Online Test

Sr. # Questions Answers Choice
1 Limes is another name of Sodium hydroxide Sodium Carbonate Calcium Carbonate Silicon dioxide
2 The mass number of sodium is. 19 31 27 23
3 Numbr of hydrogen atoms present in 18 g of water. 2 x NA N<sub>A</sub> 3 x N<sub>A</sub> 1/2 N<sub>A</sub>
4 Molecular mass of Acetic Acid 70 amu 43 amu 60 amu 80 amu
5 Formula mass of K2SO4 is. 174 amu 110 amu 180 amu 145 amu
6 Formula of common salt is NaCl AgCl LiCl KCl
7 1- gram atom of carbon contain hwo many moles. 1 mole 2 mole 6 moles 12 moles
8 1 gram formula of NaCl contan is grams. 100 g 58.5 g 32 g 49 g
9 Value of Avagadro's number is. 6.6 x 10<sup>-20</sup> 6.02 x 10<sup>23</sup> 6.00 x 10<sup>24</sup> 1.32 x 10<sup>23</sup>
10 Which compund has same molecular and emiprical formula. C6H12 O6 H2O2 H2O C6H6
11 Empirical formula of Benzene is. CH2O CH C2H CH2
12 Empirical formula of hydrogen peroxide. HO CO CHO CH
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