Study the information given below:

1) Some substances are formed when two or more elements combined together chemically.
2) Properties of these substances are different from their respective constituents.
3) These substances cannot be broken down into their respective constituents by physical methods.

Which of the following substance has the properties listed above?

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Solution

The three given properties are those of compounds. Compounds are formed by the chemical combination of two or more elements. The constituents, as in elements that chemically combine to form a compound lose their individual characteristic properties. In the given options, sugar, $(C_{6} H_{12} O_{6})$ , is a compound which is formed by the chemical combination of $C$ , $H$ and $O$ atoms.

Iodine $(I)$ , bromine $(B r)$ and calcium $(C a)$ are pure elements as they are composed of a single type of atoms.

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Similar questions

There are three substances X, Y and Z. The substance X does not have a fixed melting point or boiling point and it still shows the individual properties of its constituents. The substance Y is a pure substance which occurs in nature as such. The substance Y has a fixed melting point and boiling point but it cannot be broken down into simpler substances by any chemical means. The substance Z is also a pure substance whose properties are entirely different from those of its constituents. The substance Z can, however, be divided by electrolysis into two substances which belong to the same class of substances as Y.

(a) What type of substance could X be? Name one substance like X.

(b) What type of substance could Y be? Name one substance like Y.

(d) Which process involves absorption or release of an appreciable amount of energy: formation of substances X or formation of substance Z?

(e) Name the three groups into which all the substances like Y are divided on the basis of their properties.

Study the information given below:
1) Some substances are made up of two or more elements combined together chemically.
2) Properties of these substances are different from their constituent elements.
3) These substances cannot be broken down by physical methods.
Which of the following represent the properties listed above?

Q. Study the information given below:
1) Some substances are made up of two or more elements combined together chemically.
2) Properties of these substances are different from the elements that make them.
3) This substance cannot be broken down by physical methods.
Which among the following substances has the properties listed above?

Impure substances are obtained by combining two or more _________ substances together without any change in their _______ properties.

Which of these physical properties do not change when two different substances are used to form a mixture?

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