Question

6. In the manufacture of steel, the process in which 0, is used instead of air is
(A) Open-hearth process
(B) Acidic Bessemer's process
(C) Alkaline Bessemer's process (D) LD process
7. The ore that does NOT contain aluminium is
(A) Fluorspar (B) Feldspar (C) Cryolite (D) Mica
8. Which of the following nitrogen oxides is ionic ?
(A) Nitrogen trioxide
(B) Nitrogen pentoxide
(C) Dinitrogen tetroxide
(D) Nitric oxide
9. Which one of the following is used as the photosensitive substance in Xerox machines
(A) Hg (B) Black
P C ) Se
(D) Te
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OU 18
D​

Answer 1

6Acidic Bessemer's process

7Mica

8Nitric oxide