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Which of the following is not a compound

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Important Questions on Matter: Elements, Compounds and Mixtures

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Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds

Consider the elements of group-14. Choose the correct alternative:

a) Si and Ge are semiconductors

b) Carbon and silicon are non-metals

c) Sn and Pb are metals

d) Si and Ge are metalloids

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Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds
Distilled water is _____ of the electricity.
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Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds
Is sugar a pure or impure substance?
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Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds
Which of the following can be classified as a pure substance ?
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Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds
Explain pure substance with examples.
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Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds
A pure substance consists of only one type of
HARD
Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds
How is matter classified on the basis of the chemical constitution?
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Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds
What is the difference between pure substance and mixture. Give an example of each.
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Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds
Which of the following can be classified as a pure substance?
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Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds

Which of the following materials fall in the category of a "pure substance"?

(a) Ice

(b) Milk

(c) Iron

(d) Hydrochloric acid

(e) Calcium oxide

(f) Mercury

(g) Brick

(h) Wood

(i) Air

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Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds

______ is a basic form of matter that cannot be broken down into simpler substances by chemical reactions.

HARD
Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds
How would you confirm that a colourless liquid given to you is pure water?
HARD
Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds
Which of the following is not a pure substance?
EASY
Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds

What is meant by a pure substance?

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Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds
Can we regard milk as a pure substance?
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Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds
Which of the following statements is not correct -
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Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds
What is a pure substance?
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Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds
Try segregating the things around you as pure substances or mixtures.
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Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds
Carbon burns in oxygen to form carbon dioxide. The properties of carbon dioxide are-
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Science>Chemistry>Matter: Elements, Compounds and Mixtures>Elements and Compounds

Which of the following is NOT a pure substance ?