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Why Classification?

Classificatio...

Question

Classification of elements makes the study of physical and chemical properties of elements and __.

A

slow, difficult

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B

simple, organised

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C

Complicated, unorganized

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D

none of these

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Solution

The correct option is B simple, organised
Periodic classification of elements is the method by which elements are grouped on the basis of their characteristics. Classification of elements makes the study of physical and chemical properties of elements simple and organised.

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Similar questions

Q. Assertion : In p-block elements a lot of variation in properties of elements in a group is observed.
Reason: Difference in inner core of electronic configuration greatly influences the physical and chemical properties of elements.

Q. (a) Explain why:
(i) All the elements of a group have similar chemical properties.
(ii) All the elements of a period have different chemical properties.

(b) The atomic radii of three elements X, Y and Z of a period of the periodic table are 186 pm; 104 pm and 143 pm respectively. Giving a reason, arrange these elements in the increasing order of atomic numbers in the period.

Q. Arrange the following statements in a chronological order.
(a) Some elements be grouped in set of three elements in the increasing order of their atomic weights in which the atomic weight of the middle element was found to be the arithmetic mean of the atomic weights of the other two elements.
(b) The physical and chemical properties of elements are periodic functions of their atomic numbers.
(c) The physical and chemical properties of elements are periodic functions of their atomic weights.
(d) When elements are arranged in the increasing order of their atomic weights, the eighth element resembles the first in physical and chemical properties just as the eighth note on a musical scale resemble the first one.

Which of the following statements about a compound is incorrect ?

(a) A molecule of a compound has atoms of different elements

(b) A compound cannot be separated into its constituent elements by physical methods of separation

(c) A compound retains the physical properties of its constituent elements

(d) The ratio of atoms of different elements in a compound is fixed

Q. In a compound the (atoms/molecules) are (chemically/physically) combined so that the elements that make up the compound (retain/lose)
their identities and (do/do not) take on a new set of properties.

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