Question

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

Answer 1

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)