CG Vyapam Science MCQ Chapter Wise For Prayogshala Pricharak

Chapter 22: Periodic Classification of Elements – Important MCQs

1. Who gave the modern periodic law?
   A. Mendeleev
   B. Newlands
   C. Mosley
   D. Dobereiner
   ✔️ Answer: C. Mosley
2. The number of groups in the modern periodic table is:
   A. 7
   B. 8
   C. 18
   D. 12
   ✔️ Answer: C. 18
3. The number of periods in the modern periodic table is:
   A. 7
   B. 8
   C. 18
   D. 9
   ✔️ Answer: A. 7
4. In Mendeleev’s periodic table, the elements were arranged on the basis of:
   A. Atomic mass
   B. Atomic number
   C. Atomic volume
   D. Atomic size
   ✔️ Answer: A. Atomic mass
5. Which of the following is the lightest element?
   A. Oxygen
   B. Hydrogen
   C. Helium
   D. Carbon
   ✔️ Answer: B. Hydrogen
6. Elements in the same group have:
   A. Same atomic number
   B. Same number of valence electrons
   C. Same atomic size
   D. Same mass number
   ✔️ Answer: B. Same number of valence electrons
7. Which of the following is an alkaline earth metal?
   A. Sodium
   B. Calcium
   C. Potassium
   D. Iron
   ✔️ Answer: B. Calcium
8. Which period contains maximum number of elements?
   A. 1st period
   B. 2nd period
   C. 3rd period
   D. 6th period
   ✔️ Answer: D. 6th period
9. Which of the following is a halogen?
   A. Oxygen
   B. Fluorine
   C. Neon
   D. Argon
   ✔️ Answer: B. Fluorine
10. What is the atomic number of carbon?
    A. 4
    B. 6
    C. 8
    D. 12
    ✔️ Answer: B. 6