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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12 periods and 8 groups

8 periods and 7 groups

7 periods and 18 groups

7 periods and 12 groups

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

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Number of nucleons

All of these

Atomic mass

Atomic number

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

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Decreases

First decreases than increases

Increase

First increases than decreases

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

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Halogens

Noble gases

Alkali earth metals

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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Increase

Decreases

First increases than decreases

First decreases than increases

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

O < N < F

N < F < O

F < O < N

Q10. Newlands law is called *

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Atomic Mass Law

Periodic Law

Law of Octaves

Triads Law

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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Germanium

Oxygen

Silicon

Chlorine

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

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Scandium

Gallium

Aluminium

Germanium

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

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Group 2

Group 8

Group 10

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 metals

Noble gases

Alkali earth metals

Halogens

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

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Magnesium

Fluorine

Sodium

Oxygen

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 13 to 18

Group number 1 to 2

Group number 1 to 8

Group number 3 to 12

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

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Calcium

Neon

Helium

Boron

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

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