Periodic Classification of Elements (NSO Level 1- Science Olympiad (SOF) Class 10): Questions 1 - 4 of 60

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Passage

Read the following passage and answer the question.

Merits of Mendeleev’s periodic classification is classification of all elements, Prediction of new elements.

Defects in Mendeleev’s periodic classification and Merits of modern periodic table over Mendeleev’s periodic table in Position of hydrogen, Position of isotopes, Anomalous pairs of elements.

Question number: 1 (1 of 3 Based on Passage) Show Passage

» Periodic Classification of Elements

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Question

Mendeleev’s was the first classification, which successfully included

Choices

Choice (4) Response

a.

Elements

b.

Elements

c.

Elements

d.

All a. , b. and c. are correct

Question number: 2 (2 of 3 Based on Passage) Show Passage

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Question

Choose correct statements for Merits of modern periodic table over Mendeleev’s periodic table.

Statement 1: All isotopes of the same elements have different atomic masses but same atomic number

Statement 2: When elements are arranged in the periodic table according to their atomic numbers the anomaly regarding certain pairs of elements in Mendeleev’s periodic table disappears

Choices

Choice (4) Response

a.

Statement 1 and 2 are incorrect

b.

Only statement 2 is correct

c.

Statement 1 and 2 are correct

d.

Only statement 1 is correct

Question number: 3 (3 of 3 Based on Passage) Show Passage

» Periodic Classification of Elements

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Question

Choose correct statements for Mendeleev’s periodic classification

Statement 1: At certain places, an element of lower atomic mass has been placed before an element of higher atomic mass.

Statement 2: Different isotopes of same elements have different atomic masses

Choices

Choice (4) Response

a.

Only statement 2 is correct

b.

Statement 1 and 2 are incorrect

c.

Statement 1 and 2 are correct

d.

Only statement 1 is correct

Question number: 4

» Periodic Classification of Elements

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MCQ▾

Question

In periodic table, iron is found in which group?

Choices

Choice (4) Response

a.

9

b.

8

c.

7

d.

12

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