Chemistry General Science Test Hard Mode

Sr. #	Questions	Answers Choice
1	Magnesium keeps on burning in	N<sub>2</sub> CO<sub>2</sub> N<sub>2</sub>O N<sub>2</sub> as well as CO<sub>2</sub>
2	Calcium cyanamide on treatment with steam under pressure gives NH₃ and	<span style="font-size: 14.44444465637207px;">Calcium carbonate</span> <span style="font-size: 14.44444465637207px;">Calcium hydroxide</span> <span style="font-size: 14.44444465637207px;">Calcium oxide</span> <span style="font-size: 14.44444465637207px;">Calcium bicarbonate</span>
3	The formula of calcium cyanamide is	Ca(CN)<sub>2</sub> CaC<sub>2</sub>N CaNCN CaCHNH<sub>2</sub>
4	Setting of plaster of paris involves	Oxidation with atmospheric oxygen Combination with atmosphere CO<sub>2</sub> Dehydration Hydration to yield another hydrate.
5	Setting of cement is an	Exothermic reaction Endothermic reaction Neither exothermic nor endothermic None

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