General Knowledge MCQ - English
Which of the following is used in pencils?
Graphite
Silicon
Charcoal
Phosphorous
Answer : A
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1) Potassium nitrate is used in
2) Which of the following are the ingredients of gun metal?
3) Amalgams are
highly coloured alloys
alloys which contain mercury as one of the contents
alloys which have great resistance to abrasion
alloys which contain carbon
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4) The type of glass used in making lenses and prisms is
5) Actinides are the elements with atomic numbers from
