Chemistry General Science Test Hard Mode

Sr. #	Questions	Answers Choice
1	If N_A is Avogadro's number then number of valence electrons in 4.2 g of nitride ions N^3-is	2.4 N<sub>A</sub> 4.2 <span style="font-size: 14.44444465637207px;">N</span><sub>A</sub> 1.6 <span style="font-size: 14.44444465637207px;">N</span><sub>A</sub> 3.2 <span style="font-size: 14.44444465637207px;">N</span><sub>A</sub>
2	2 g oxygen contains number of atoms equal to that in	0.5 g of hydrogen 4 g of sulphur 7 g of nitrogen 2.3 g of sodium
3	The total number of protons in 10 g of calcium carbonate is (N_o = 6.023 x 10²³)	1.5057 x 10<sup>24</sup> <span style="font-size: 14.44444465637207px;">2.0478 x 10</span><sup>24</sup> <span style="font-size: 14.44444465637207px;">3.0115 x 10</span><sup>24</sup> <span style="font-size: 14.44444465637207px;">4.0956 x 10</span><sup>24</sup>
4	The number of oxygen atoms in 4.4 g of CO₂ is approximately	1.2 x 10<sup>23</sup> 6 x 10<sup>22</sup> 6 x 10<sup>23</sup> 12 x 10<sup>23</sup>
5	The number of atoms contained in 11.2 L of SO₂ at S.T.P are	3/2 x 6.02 x 10<sup>23</sup> 2 x 6.02 x 10<sup>23</sup> 6.02 x 10<sup>23</sup> 4 x 6.02 x 10<sup>23</sup>

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