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MCQs for Periodic Classification of Elements
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MCQs for Periodic Classification of Elements
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22 Questions

1. An element X combines with oxygen to form an oxide XO. This oxide is electrically con¬ducting. Write the formula of the compound formed when X reacts with chlorine.
2. Which one of the following statements is not correct about the trends in the properties of the elements of a group on going down in a group?
3. A metal 'M' is in the first group of the Periodic Table. What will be the formula of its oxide?
4. 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?
5. Upto which element, the Law of Octaves was found applicable?
6. The arrangement of elements in the Modem Periodic Table is based on their
7. Upto which element, the Law of Octaves was found applicable?
8. 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?
9. Carbon belongs to the second period and Group 14. Silicon belongs to the third period and Group 14. If atomic number of carbon is 6, the atomic number of silicon is
10. An element X from group 2 of the Periodic Table reacts with Y from group 17 to form a compound. Give the formula of the compound.
11. An element 'A' belongs to the third period and group 16 of the Periodic Table. Find out the valency of A.
12. The properties of eka-aluminium predicted by Mendeleev are the same as the properties of later discovered element:
13. The elements A, B and C belong to groups 1, 14 and 17 respectively of the Periodic Table. Which two elements will form ionic compounds?
14. Which one of the following statements is not correct about the trends in the properties of the elements of a period on going from left to right?
15. The arrangement of elements in the Modem Periodic Table is based on their
16. The elements A, B and C belong to groups 1, 14 and 17 respectively of the Periodic Table. Which two elements will form ionic compounds?
17. What is the atomic number of element of period 3 and group 17 of the Periodic Table?
18. An element X from group 2 of the Periodic Table reacts with Y from group 17 to form a compound. Give the formula of the compound.
19. At the time of Mendeleev, the number of elements known was
20. Name the neutral atom in the Periodic Table which has the same number of electrons as K+ and Cl-.
21. An element X combines with oxygen to form an oxide XO. This oxide is electrically con¬ducting. Write the formula of the compound formed when X reacts with chlorine.
22. An atom of an element has the electronic confi-guration 2,8,2. To which group does it belong?

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