1. 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
2. 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
3. Which group was added in Mendleev's periodic table?
A) I group
B) VIII group
C) zero group
D) V group
4. What type of oxide would aluminium form?
(a) EO3
(b) E2O3
(c) E3O2
(d) EO
5. Which of the following is the outermost shell for elements of period 4?
(a) K
(b) L
(c) M
(d) N
6. Which of the following is the correct increasing order of the atomic radii of O, F and N?
(a) O ,F ,N
(b) N, F, O
(c) O, N, F
(d) F, O, N
7. What will be the atomic number of the following elements that will form an acidic oxide?
(a)7
(b) 13
(c) 12
(d) 19
8. Which of the following is the correct option?
(a) The elements calcium, strontium and barium were put in one group called alkaline earth metal group or alkaline.
(b) The elements calcium, strontium and barium have similar chemical properties and form a triad.
(c). The elements calcium, strontium and barium have a valency of 2 (they are divalent).
(d). All the above.
9. Consider The Following Statements And Choose The Incorrect One:
(a). Silicon element is a metalloid which is a semiconductor.
(b). Silicon is used to make silicon ‘chips’. The silicon chip has enabled scientists to integrate thousands of transistors into a tiny space.
(c) Silicon chips have made it possible to make circuits incredibly small (as those used in this laptop computer).
(d). None of the above.
10. Which one is a smallest ion?
(a) Al+++
(b) Mg++
(c) Na+
(d) Ba++
11. Why are Elements classified?
(a) to enable a better understanding on fundamental properties of Elements.
(b) to find a place for each element and know about its relationship with other elements.
(c) to understand each element in a better way based on various observations.
(d) All of these
12. The arrangement of elements in modern periodic table is based on
(a) electronic configuration
(b) atomic mass
(c) atomic number
(d) valency
13. Find the metalloids in the periodic table
(a) boron , silicon , germanium , arsenic
(b) antimony , tellurium , polonium
(c) antimony , gallium , indium
(d) both (a) and (b)
14. Name the most electronegative element of Periodic table ?
(a) Chlorine
(b) Bromine
(c) Fluorine
(d) Iodine
15. Write valency of Iron ?
(a) 2
(b) 3
(c) 0
(d) 2,3
16. The standard element chosen for relative atomic mass is __.
(a) Carbon-12
(b) Hydrogen-1
(c) chlorine -35
(d) Iodine -121
17. Isotopes possess -
(a) same number of electrons
(b) same number of neutrons
(c) same number of protons
(d) none
18. 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
19. Where would you locate the element with electronic configuration 2, 8 in the Modern Periodic Table?
(a) Group 8
(b) Group 18
(c) Group 2
(d) Group 10
20. A metal ‘M’ is in the first group of the Periodic Table. What will be the formula of its oxide?
(a) MO
(b) M2O
(C) M2O3
(d) MO2
Answer:-
1--c
2--c
3--c
4--b
5--d
6--d
7--a
8--d
9--d
10--a
11--d
12--a
13--d
14--c
15--d
16--a
17--c
18--c
19--b
20--b
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