______types of hydride compounds can be formed depending on the electronegativity of the elements
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When alkali metals are heated with hydrogen they form--------hydrides
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Silt is an example of ------ hydride
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Which of these statements is not true of metallic hydrides?
A. they are volatile
B. they are deficient in hydrogen
C. most have metallic appearance
D. They are all conductors of heat
Answer: A
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Sodium Hydride is an example of ------- hydride
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All these are types of metal lattices except-------
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Which of these statements is not true of metallic elements?
A. they are ductile
B. they have lustre
C. They form acidic oxides
D. they are malleable
Answer: C
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All these are consequences of the sole valence electron in alkali metals except ------
A. the metals are soft
B. good conduction of electricity
C. good conduction of heat
D. the silvery luster
Answer: A
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Which of these statements is not true?
A. liquid ammonia is is used to form carbides
B. All metals react with carbon to form carbides
C. lithium reacts with carbon to form ionic carbides
D. Acetylene is neccesary for the formation of some carbide
Answer: B
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In the group of the alkali metals the degree of hydration-------- down the group.
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