Class 9th Chemistry Chapter 3


Total Marks: 29

1. Mendeleev periodic table was based upon the:
Electronic configuration atomic mass Atomic number Completion of subshell
2. How many groups are there in long form of periodic table?
32 22 14 18
3. The vertical columns in Periodic table are called:
Groups Shells Periods none of these
4. nto how many blocks does the modern periodic table divide the elements?
1 2 3 4
5. How many elements are there in the fourth period of modern periodic table?
32 18 2 8
6. Who proposed the name \"Periodic table\" for the arrangement of elements?
Bohr Dobereiner Mendeleev Newlands
7. The atomic radii of the elements in Periodic table:
Increase from left to right in period increase from top to bottom in group Decreases from top to bottom in a group Do not change from left to right in a group
8. Which groups of periodic table are included in p block elements?
Group 6 to 12 Group 1 to 5 Group 1 to 18 Group 13 to 18
9. In which block elements of group 17 are found?
s p d f
10. When atomic number was discoverd ?
1913 1912 1911 1914
11. Electronegativity of fluorine is :
2 4 3 5
12. What is the electronegativity of carbon?
2 1 2.6 4
13. Which one of the following halogen has the highest electronegativity?
fluorine Chlorine Iodine Bromine
14. The ionization energy is measured in:
kJ/mol J/mol kcal/mol cal/mol
15. The unit of electronegativity is:
No unit Watt arg kJ mol-1
16. The trend of ionization energy in a group from top to bottom is:
It decreases It increases Remains same None of these
17. Electron affinity is written with which sign?
Negative Positive No sign None of these
18. Salts of sodium display which color in fireworks?
Blue Green Yellow Red
19. Bromine is in which group of modern periodic table?
9 17 13 2
20. Transition elements are:
All gases All metals All non-metals all metalloids
21. Along the period, which one of the following decreases:
Atomic radius Ionization energy Electron affinity Electronegativity
22. Which one of the following halogen has the lowest electronegativity?
Fluorine Chlorine Bromine Iodine
23. 4th and 5th period of long form of periodic table are called:
Short periods Normal periods Long periods Very long periods
24. Long form of periodic table was constructed on the basis of:
Mendeleev postulate Atomic number Atomic mass Mass number
25. Mendeleev periodic table was based upon the:
Electronic configuration Atomic mass Atomic numbe Completion of subshell
26. The amount of energy given out when an electron is added to an atom is called:
Lattice energy Ionization energy Electronegativity Electron affinity
27. The atomic radii of the elements in Periodic table:
Increase from left to right in period increase from top to bottom in group Decreases from top to bottom in a group Do not change from left to right in a group
28. Mark the incorrect statement about ionization energy:
It is measured in kJmo-1 It decreases in a period It is absorption of energy It decreases in a group
29. Point out the incorrect statement about electron affinity
It is measured in kJmol-1 It decreases in a period It involves release of energy It decreases in a group