Showing posts from August, 2021Show all
CLASS 10TH CHAPTER-1 SCIENCE MOST IMPORTANT MCQ'S
CLASS 10TH CHAPTER-1 SCIENCE MOST IMPORTANT MCQ'S1.Before burning in air, the magnesium
ribbon is cleaned by rubbing with a sand paper to:
a. Make the ribbon surface shinier
b. Remove the layer of magnesium oxide
from the ribbon surface
c. Remove the layer of magnesium carbonate
from the ribbon surface
d. Remove the moisture from the ribbon
surface2. In a chemical reaction between sulphuric acid and
barium chloride solution the white precipitates formed are of:
a. Hydroc…
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