7 Identify the dispersed phase of fog.
8 Name the type of change that takes place when calcium carbonate decomposes to give
oxide and carbon dioxide.
9 What is the mass percent of a solution?
ASSERTION AND REASON
The following questions consist of two sentences-Assertions (A) and Reason (R). Answ
questions selecting appropriate option given below:
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true and R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
10 ASSERTION (A): Refining of petroleum involves fractional distillation.
REASON (R): Fractional distillation involves repeated evaporation and distillati
11 ASSERTION (A): A mixture of salt and camphor is separated by sublimation.
REASON (R): Camphor is sublimable whereas salt is non-sublimable.
12 ASSERTION (A): During a chemical change no new substance is formed.
REASON (R): Burning a candle involves both physical and chemical changes.
THREE MARK QUESTIONS
ion contains of common call in 320 p of water
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Sawge se kerege sab kal ?.......?e
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