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CBSE Notes 2011-2012 » IX-Science

Is Matter Around Us Pure ?

Which of the following are homogeneous in nature ? (i) ice (ii) wood (iii) soil (iv) air

Multiple choice question

Which of the following are homogeneous in nature ?
(i) ice (ii) wood (iii) soil (iv) air

Which of the following are physical changes ? (i) Melting of iron metal (ii) Rusting of iron (iii) B...

Multiple choice question

Which of the following are physical changes ?
(i) Melting of iron metal
(ii) Rusting of iron
(iii) Bending of an iron rod
(iv) Drawing a wire of iron metal

Which of the following are chemical changes ? (i) Decaying of wood (ii) Burning of wood (iii) Sawing...

Multiple choice question

Which of the following are chemical changes ?
(i) Decaying of wood
(ii) Burning of wood
(iii) Sawing of wood
(iv) Hammering of a nail into a piece of wood

Two substances, A and B were made to react to form a third substance, A2B according to the following...

Multiple choice question

Two substances, A and B were made to react to form a third substance, A2B according to the following reaction
2A + B- - > A 2 B
Which of the following statements concerning this reaction are incorrect ?
(i) The product A2B shows the properties of substances A and B.
(ii) The product will always have a fixed composition.
(iii) The product so formed cannot be classified as a compound.
(iv) The product so formed is an element.

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?

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