Question

7. Which of the following materials fall in the category of a “pure substance"? Aa Hal Ice (b) Milk (C) Iron (d) Hydrochloric acid le) Calcium oxide Mercury (g) Brick (h) Wood (i) Air. ( (1) 21 11​

Answer 1

Answer:

Aa Hal Ice

and iron

A preposition is a word or group of words used before a noun, pronoun, or noun phrase to show direction, time, place, location, spatial relationships, or to introduce an object. Some examples of prepositions are words like "in," "at," "on," "of," and "to

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Answer 2

Answer:

(B) Milk

(H) Wood

(i) Air

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