Question 5 : High purity silicon is obtained from----------
Silicon dioxide
Silicon tetrachloride
Silicon hydroxide
Silicon dihydride
Question 6 : The three dimensional linkages makes diamond one of the
hardest
most beautiful
most expensive
slimmest
Question 7 : Which of these compounds is used as antiknock additives to petrol for internal combustion engines?
Tetramethyl lead
lead oxide
lead sulphate
lead chloride
Question 8 : The property by which elements form long chain compounds by single or multiple bond formation between atoms of the same elements is----
Catenation
Polymorphysm
Dention
Polimerization
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