E-PolyLearning

491. Diamonds are hard and
a. do not conduct electricity
b. bear high melting point
c. bear high boiling point
d. all of above
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Answer: (d).all of above

492. Metals can be hammered into different shapes and drawn into wires hence they are
a. soft
b. malleable
c. strong
d. weaker
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Answer: (b).malleable

493. Giant ionic structures are also name given to
a. ionic lattice
b. crystal lattice
c. metallic lattice
d. covalent lattice
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Answer: (a).ionic lattice

494. The mixture of metal or metals with non-metals gives off an
a. alloy
b. allotrope
c. isotope
d. lattice
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Answer: (a).alloy

495. There are strong attractive forces between metal ions and delocalized electrons gives
a. high tensile strength only
b. hardness only
c. color
d. high tensile strength and hardness
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Answer: (d).high tensile strength and hardness