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- 1. Multiple Choice
The melting point of iodine is higher than that of chlorine. Which one of the following statements best explains this phenomenon?
Iodine is darker in colour than chlorine
Iodine atoms are smaller than chlorine atoms
Iodine atom has more electrons than a chlorine atom
The intermolecular forces in iodine is stronger than in chlorine
- 2. Multiple Choice
Which element is most likely to be an effective catalyst in the catalytic converter of car exhausts?
Lithium
Aluminium
Magnesium
Platinum
- 3. Multiple Choice
An atom of element X has 4 shells containing electrons. When element X reacts with chlorine, a compound with formula XCl is formed. Which of the following is the element X?
Calcium
Potassium
Sodium
Silicone
- 4. Multiple Choice
Table shows the arrangement of electrons of elements in Period 3 of the Periodic Table. Which one of the following shows the correct descending order of their atomic radii?
M,L,N,P,K
L,M,N,K,P
P,K,N,M,L
K,L,M,N,P
- 5. Multiple Choice
The following are the uses of inert gases except
used in advertising lights
used to fill a weather balloons
used in lasers for eye treament
used as a catalyst in Haber process
- 6. Multiple Choice
Sodium and rubidium are both elements in Group 1 of the Periodic Table. Which of the following statements is correct?
Both metals form acidic oxides
Rubidium has a lower melting point than sodium
Rubidium reacts less quickly with water than sodium
Rubidium has less electrons compared to sodium
- 7. Multiple Choice
In what ways Mendeleev's classification system was a great improvement over John Newlands table?
I and IV only
II and IV only
I and III only
I, II and III only
- 8. Multiple Choice
The different reactivity of Group 1 elements of the Periodic Table is due to the
I,II,III only
I,II,IV only
I,III,IV only
II,III,IV only
- 9. Multiple Choice
Which one of the following statements best accounts for the inert properties of Group 18 elements?
All of them have 18 elements in an atom
All of them have 8 valence electrons in each atom
All of them are rare gases and very difficult to find
Their valence shell are completely filled by electrons
- 10. Multiple Choice
Fluorine is the first element in Group 17 of the Periodic Table. Which statement about fluorine is not correct?
It forms ionic compound with sodium
It is gas at room temperature and pressure
Its molecules are diatomic at room temperature
Its molecules are monoatomic at room temperature
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