The tip of the lead pencil is made of
A) lead
B) graphite
C) zinc
D) charcoal
Correct Answer:
Verified
Q8: A lustrous non-metal is
A)diamond
B)iodine
C)sulphur
D)phosphorus
Q9: Sodium is a
A)silvery white and very soft
Q10: Which of the following is used for
Q11: What should be added to pure iron
Q12: The red or Orange coating that forms
Q14: The most abundant element in the sun's
Q15: Ordinary glass is a mixture of
A)sodium silicate,
Q16: Glass used for making wind screens of
Q17: Annealing is done to
A)increase brittleness
B)increase Transparency
C)decrease brittleness
D)increase
Q18: Steel is preferred over iron in construction
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