Question

2. Which of the following pairs has one element and one mixture?
(a) Carbon, Silicon
(c) Bronze, Zinc
(b) Helium, Nitrogen
(d) Copper, Silver
3. Gases can be obtained from air by the process of
(a) Condensation
(c) Fractional distillation
(b) Evaporation
(d) Crystallization
4. Tyndall effect is exhibited by
(a) Sugar solution
(c) Salt solution
(b) Soap solution
(d) Muddy water
5. Two chemical species X and Y combine together to fom a product P which
contains X and Y
X + Y ---- → P
X and Y cannot be broken down into simpler substance by simple chemical
reactions. Which of the following concerning the species X, Y and P are​

Answer 1

Answer:

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