NTSE MCQs 1 on "Periodic Classification of Elements"

These are MCQs of (Periodic Classification of Elements) for 11th Class. Practice MCQs to check your knowledge for Entrance examination like NTSE etc.

1. The period that contains only gaseous elements are:

• 1
• 2
• 3
• 4

2. The longest and the shortest periods are:

• 1 & 6
• 2 & 6
• 6 & 1
• 1 & 7

3. The number of elements present in the 2^nd, 3^rd, 4^th and 5^th periods of the modern periodic table are:

• 2,8,8,18
• 8,8,18,32
• 8,8,18,8
• 8,18,18,32

4. The pairs of elements with the following atomic numbers have the same chemical properties:

• 13 & 12
• 3 & 11
• 4 & 24
• 2 & 1

5. Elements with atomic number 15 and mass number 31 is present in:

• Group 5 and period 4
• Group5 and period 3
• Group15 and period 3
• Group15 and period 4

6. Which of the following will form acidic oxide? An element with atomic number:

• 7
• 11
• 21
• 19

7. Which amongst the following represents the correct order of decreasing metallic character of elements Na, Si, Cl, Mg, Al

• Cl> Si> Al> Mg> Na
• Na> Mg> Al> Si> Cl
• Na> Si> Mg> Al> Cl
• Al> Na> Si> Cl> Mg

8. Which of the following are characteristics of isotopes of an element?
a. Isotopes of an element have same atomic masses
b. Isotopes of an element have same atomic number
c. Isotopes of an element show same physical properties
d. Isotopes of an element have same chemical properties

• A, c, d
• B, c, d
• B and c
• B and d

9.Where would you locate an element with electronic configuration 2, 8,7 in the modern periodic table?

• Group 7 and period 2
• Group7 and period 3
• Group 17 and period 3
• Group17 and period 3

10.Which of the given elements A, B , C, D and E with atomic numbers 2, 4, 8, 10 and 18 respectively belong to the same period?

• A, B, C
• B,C,D
• A,D,E
• B,D,E