Question 6 : The purest form of silicon dioxide is-----
rock crystal
cristobalite
silicates
silibolite
Question 7 : Which of the following trihalides of nitrogen is stable?
chloride
bromide
floride
iodide
Question 8 : Which of the following is used in baking powder and toothpastes?
calcium phosphate
Calcium chloride
sodium tripolyphosphate
nitric acid
Question 9 : Glass is produced from mixture of silicates mainly of
K and Ca
Na and Al
K and Al
Na and Ca
Question 10 : Which of these will give a positive brown ring test?
nitric oxide
nitric dioxide
nitrogen oxide
dinitrogen tetraoxide
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2017-04-08T21:44:29-0400
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