Glass used for making wind screens of automobiles is
A) hard glass
B) photo chromatic glass
C) safety glass
D) optical glass
Correct Answer:
Verified
Q11: What should be added to pure iron
Q12: The red or Orange coating that forms
Q13: The tip of the lead pencil is
Q14: The most abundant element in the sun's
Q15: Ordinary glass is a mixture of
A)sodium silicate,
Q17: Annealing is done to
A)increase brittleness
B)increase Transparency
C)decrease brittleness
D)increase
Q18: Steel is preferred over iron in construction
Q19: The carbon content in steel is
A)0.1 -
Q20: Permanent magnets can be made from
A)Ni steel
B)cobalt
Q21: The main constituents of cement are:
A)calcium oxide,
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