Q44: Which of the following are all allotropes?
A)
Q44: The allotropes of carbon are graphite,diamond,and the
Q47: What reaction produces diborane?
A)BH3(g)and B(s).
B)BF3(g)and NaBH4(s).
C)B(s)and H2(g).
D)B(s)and
Q47: The formula of diborane is
A) BH3.
B)
Q48: When magnesium burns in air,the product(s)is (are)
A)MgO.
B)MgO
Q50: The oxides of In and Tl
A)are amphoteric.
B)react
Q50: The role of magnesium in chlorophyll is
A)
Q53: Which of the following is not
Q54: The formula of boric acid written as
Q57: When aluminum sulfate is dissolved in water,is
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