Chemistry GK · all questions

Periodic Classification of elements
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Q21

In . . . . . . . . Newlands arranged the known elements according to the increasing order of atomic masses and found that the properties of each eighth element are similar to the properties of the first element.

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Q22

Which of the following does not increase in going from top to the bottom in a group

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Q23

In the modern periodic table, what are the basic elements of group 18 (all other than having eight electrons in their outermost shell)?

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Q24

Which one of the following triads represents the Dobereiner triad?

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Q25

A factor affecting the ionization potential of an element is . . . . . . . .

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Q26

Consider the following statements with reference to the Periodic Table of chemical element
1. Ionisation potential gradually decreases along a period.
2. In a group of element, electron affinity decreases as the atomic weight increases.
3. In a given period, electronegativity decrease as the atomic number increases.
Which of these statement(s) is/are correct?

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Q27

. . . . . . . . shows that the atomic number of an element is more fundamental than its atomic mass?

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Q28

Name the Russian chemist who proposed that the properties of elements are a periodic function of their atomic masses?

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Q29

Select the option to be obtained by placing the following elements in descending order based on their metallic characteristics.
Na, Si, Cl, Mg, Al

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Q30

Newlands' octave rule applies only to . . . . . . . . element.

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Q31

Which element has the highest melting point and boiling point?

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Q32

Which among the following has similar ionic charge to size ratio?

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Q33

Which of the following inert gas is kept in period 4 of the periodic table?

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Q34

Out of the four blocks in which periodic table is divided, helium belongs which block?

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Q35

Which among the following has lowest electron affinity?

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Q36

Lanthanides and actinides are also called . . . . . . . .

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Q37

Hydrogen and helium Is placed in . . . . . . . .

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Q38

Which group in the periodic table is also known as zero group (group 0)?

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Q39

What did Dobereiner identify and name a group of three elements?

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Q40

Fill in the blank with the correct option: "The properties of elements are the periodic functions of their atomic masses". This is the statement of . . . . . . . .

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