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PERIODIC CLASSIFICATION CLASS 10
SCIENCE CLASS 10
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Q1. Upto which element, the Law of Octaves was found applicable?
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(a) Oxygen
(b) Calcium
(c) Cobalt
(d) Potassium
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Q2. At the time of Mendeleev, the number of elements known was:
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(a) 63
(b) 65
(c) 62
(d) 64
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q3. The arrangement of elements in the Modem Periodic Table is based on their:
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(a) increasing atomic mass in the period
(b) increasing atomic number in the horizontal rows
(c) increasing atomic number in the vertical columns
(d) increasing atomic mass in the group
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q4. Where would you locate the element with electronic configuration 2, 8 in the Modern Periodic Table?
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(a) Group 8
(b) Group 2
(c) Group 18
(d) Group 10
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q5. On moving from left to right in a period in the periodic table, the size of the atom:
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(a) increases
(b) decreases
(c) does not change appreciably
(d) first decreases and then increases.
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q6. An atom of an element has the electronic configuration 2, 8, 2. To which group does it belong?
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(a) 4th group
(b) 6th group
(c) 3rd group
(d) 2nd group
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q7. The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
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(a) Metal
(b) Metalloid
(c) Non-metal
(d) Left-hand side element
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q8. Element ‘A’ has electronic configuration 2, 7; ‘B’ has electronic configuration 2, 8, 5 and ‘C’ has electronic configuration 2, 8, 7. Which two elements will exhibit similar chemical properties?
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(a) A and C
(b) A and B
(c) B and C
(d) None of these
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q9. Newlands relation is called:
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(a) Musical Law
(b) Law of Octaves
(c) Periodic Law
(d) Atomic Mass Law
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q10. The atom of an element has electronic con-figuration 2, 8, 7. To which of the following elements would it be chemically similar?
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(a) N(7)
(b) P(15)
(c) Na(11)
(d) F (9)
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