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CBSE Notes 2011-2012 » IX-Science

Is Matter Around Us Pure ?

Two chemical species X and Y combine together to form a product P which contains both X and Y ...

Multiple choice question

Two chemical species X and Y combine together to form a product P which contains both X and Y
X + Y ---> P
X and Y cannot be broken down into simplersubstances by simple chemical reactions. Which of
the following concerning the species X, Y and P are correct ?
(i) P is a compound
(ii) X and Y are compounds
(iii) X and Y are elements
(iv) P has a fixed composition

Which of the following has the highest solubility at 313 K?

Multiple choice question

Which of the following has the highest solubility at 313 K?

Mixture of ammonium chloride and sodium chloride can be separated by

Multiple choice question

Mixture of ammonium chloride and sodium chloride can be separated by

The process of getting pure solid by cooling hot saturated solution is called .

Multiple choice question

The process of getting pure solid by cooling hot saturated solution is called .

A. Pure substances have fixed melting point. B. The properties of compound are similar to that of it...

Multiple choice question

A. Pure substances have fixed melting point.
B. The properties of compound are similar to that of its components.

A. Sea water is a mixture. B. Gases can be liquified at low temperature and low pressure.

Multiple choice question

A. Sea water is a mixture.
B. Gases can be liquified at low temperature and low pressure.

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