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2 questions · 2004 · answers as per the UPSC key

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UPSC 2004 · Q56 · Science & Technology › Chemistry · Save

Consider the following statements:

  1. Banking soda is used in fire extinguishers.
  2. Quicklime is used in the manufacture of glass.
  3. Gypsum is used in the manufacture of Plaster of Paris.

Which of the statements given above is/are correct?

(a) 1 and 2
(b) 2 and 3
(c) 1 only
(d) 1, 2 and 3
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Answer: (d) 1, 2 and 3
UPSC 2004 · Q129 · Science & Technology › Chemistry · Save

Salts

of which of the following elements provide colours to fireworks?

(a) Zinc and sulphur
(b) Potassium and mercury
(c) Strontium and barium
(d) Chromium and nickel
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Answer: (c) Strontium and barium