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7 questions · timed · auto-graded

Question 11 Mark
Substances or materials through which we cannot see things, are called $.........$ materials.
Answer
Opaque
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Question 21 Mark
$.........$ gas dissolved in water is very important for the survival of animals and plants that live in water.
Answer
Oxygen
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[1 Marks Each] Blanks - Science STD 6 Questions - Vidyadip