Periodic Classification of Elements- 06

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Q1. Which of the following forms the basis of the modern periodic table? *

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All of these

Atomic mass

Number of nucleons

Atomic number

Q2. How many periods and groups are present in the modern periodic table? *

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7 periods and 12 groups

8 periods and 7 groups

12 periods and 8 groups

7 periods and 18 groups

Q3. Which of the following forms the basis of the Mendeleev's periodic table? *

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Number of nucleons

Atomic mass

All of these

Atomic number

Q4. What happens to the electronegativity of elements on moving from left to right in a periodic table? *

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Increase

First increases than decreases

First decreases than increases

Decreases

Q5. What is the other name for group 17th elements? *

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Noble gases

Alkali earth metals

Halogens

Alkali metals

Q6. Element X forms a chloride with the formula XCl, which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as *

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Q7. An element X belongs to the 3rd period and 1st group of the periodic table. What is the number of valence electrons in its atom? *

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Q8. What happens to the electropositive character of elements on moving from left to right in a periodic table? *

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First increases than decreases

First decreases than increases

Decreases

Increase

Q9. Which of the following is the correct order of the atomic radii of the elements oxygen, fluorine and nitrogen? *

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O < F < N

F < O < N

O < N < F

N < F < O

Q10. Newlands law is called *

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Periodic Law

Atomic Mass Law

Triads Law

Law of Octaves

Q11. In Mendeleev’s Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the Periodic Table later? *

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Silicon

Chlorine

Oxygen

Germanium

Q12. The properties of eka-aluminium predicted by Mendeleev are the same as the properties of later discovered element: *

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Scandium

Aluminium

Germanium

Gallium

Q13. Where would you locate the element with electronic configuration 2, 8 in the Modern Periodic Table? *

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Group 8

Group 10

Group 2

Group 18

Q14. An element X belongs to the 3rd period and 2nd group of the periodic table. What is the number of valence electrons in its atom? *

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Q15. What is the other name for group 18th elements? *

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Alkali earth metals

Halogens

Noble gases

Alkali metals

Q16. Which of the following is the most reactive element of the group 17? *

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Oxygen

Fluorine

Magnesium

Sodium

Q17. Element X forms a chloride with the formula XCl2, which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as *

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Q18. Which group elements are called transition metals? *

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Group number 3 to 12

Group number 1 to 2

Group number 13 to 18

Group number 1 to 8

Q19. Which of the following elements has 2 shells and both are completely filled? *

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Boron

Neon

Calcium

Helium

Q20. Which of the following is the atomic number of an element that forms basic oxide? *

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