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Q1. At the time of Mendeleev, the number of elements known was
(a) 63
(b) 65
(c) 62
(d) 64
(a) 63
Q2. The properties of eka-aluminium predicted by Mendeleev are the same as the properties of later discovered element:
(a) Scandium
(b) Germanium
(c) Gallium
(d) Aluminium
(c) Gallium
Q3. An atom of an element has the electronic confi-guration 2,8,2. To which group does it belong?
(a) 4th group
(b) 6th group
(c) 3rd group
(d) 2nd group
(d) 2nd group
Q4. The arrangement of elements in the Modem Periodic Table is based on their
(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
(b) increasing atomic number in the horizontal rows
Q5. Where would you locate the element with electronic configuration 2, 8 in the Modern Periodic Table?
(a) Group 8
(b) Group 2
(c) Group 18
(d) Group 10
(c) Group 18
Q6. Element ‘X’ forms a chloride with the formula XCl2, which is a solid with high melting point. X would most likely be in the same group of the periodic table as:
(a) Si
(b) Mg
(c) Al
(d) Na
(b) Mg
Q7. Which of these belong to the same period?
Element A B C
Atomic number 2 10 5
(a) A, B
(b) B, C
(c) C, A
(d) A, B and C
(b) B, C
Q8. An atom of an element has the electronic configuration 2, 8, 2. To which group does it belong?
(a) 4th group
(b) 6th group
(c) 3rd group
(d) 2nd group
(d) 2nd group
Q9. In modern periodic table, elements are arranged according to their
(a) atomic weight
(b) density
(c) atomic number
(d) melting point
(c) atomic number
Q10. In which group are inert elements placed? ‘
(a) Group 8
(b) Group 10
(c) Group 1
(d) Group 18
(d) Group 18
Q11. Which of the following sets of atomic number belong to that of alkali metals?
(a) 1, 12, 30, 4, 62
(b) 37, 19, 3, 55
(c) 9, 17, 35, 53
(d) 12, 20, 56, 88
(b) 37, 19, 3, 55
Q12. 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?
(a) Metal
(b) Metalloid
(c) Non-metal
(d) Left-hand side element
(b) Metalloid
Q13. The amount of energy released when one or more electrons is added to the neutral atom is
(a) electron affinity
(b) ionisation energy
(c) electron negativity
(d) atomicity
(a) electron affinity
Q14. The valence shell of element A contains 3 electrons while the valence shell of element B contains 6 electrons. If A combines with B, the probable chemical formula of the compound is
(a) AB2
(b) A2B
(c) A2B3
(d) A3B2
(c) A2B3
Q15. Arrange the following elements in the order of their increasing non-metallic character.
Li, O, C, Be, F
(a) F < O < C < Be < Li
(b) Li < Be < C < O < F
(c) F < O < C < Be < Li
(d) F < O < Be < C < Li
(b) Li < Be < C < O < F
Q16. One of the defects of Mendeleeff’s periodic table is that:
(a) halogens are placed in the same group
(b) on its basis properties of known elements cannot be predicted
(c) elements of dissimilar properties are placed in the same group
(d) periodic table is not based on any fundamental principle.
(c) elements of dissimilar properties are placed in the same group
Q17. Modern periodic table is based on:
(a) atomic weight
(b) equivalent weight
(c) molecular weight
(d) atomic number
(d) atomic number
Q18. The number of groups in Mendeleeff’s periodic table is:
(a) 7
(b) 8
(c) 9
(d) 16
(c) 9
Q19. Modern periodic law is given by:
(a) Mendeleeff
(b) Moseley
(c) Priestly
(d) Davy.
(b) Moseley
Q20. Element with 18 atomic number is in:
(a) zero group
(b) VIII group
(c) period fourth
(d) transition series.
(a) zero group
Q21. Number of elements in second period is:
(a) 2
(b) 8
(c) 10
(d) 18
(b) 8
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