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
1
Expert's answer
2017-04-10T08:13:10-0400
Question 6: The purest form of silicon dioxide is----- rock crystal cristobalite silicates silibolite Answer: cristobalite Question 7: Which of the following trihalides of nitrogen is stable? chloride bromide floride iodide Answer: floride Question 8: Which of the following is used in baking powder and toothpastes? calcium phosphate Calcium chloride sodium tripolyphosphate nitric acid Answer: sodium tripolyphosphate Question 9: Glass is produced from mixture of silicates mainly of K and Ca Na and Al K and Al Na and Ca Answer: Na and Ca Question 10: Which of these will give a positive brown ring test? nitric oxide nitric dioxide nitrogen oxide dinitrogen tetraoxide Answer: nitric oxide (NO)
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