Test-MCQ Class 10-NCERT -Science-Chapter 5-Test-1 Chapter 5: Periodic Classification of Elements Multiple Choice Questions No of Questions : 10 Marks: 10 Please enter your email: 1. Which of the following is the outermost shell for elements of 2nd period? K-shell N-shell L-shell M-shell 2. An element which is an essential constituent of all organic compounds belongs to group 16 group 14 group 15 group 1 3. Which one of the following elements exhibit maximum number of valence electrons? Al Na P Si 4. Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period? B, D, E A, B, C B, C, D A, D, E 5. The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belong to the same group? A and B D and E B and D A and C 6. In Mendeleev’s periodic table, gaps were left for the elements to be discovered later. Which one of the following elements found a place in the periodic table later? Germanium Chlorine Silicon Oxygen 7. Which of the following are the characteristics of isotopes of an element? (i) Isotopes of an element have same atomic masses. (ii) Isotopes of an element have same atomic number. (iii) Isotopes of an element show same physical properties. (iv) Isotopes of an element show same chemical properties. (ii) and (iv) (ii) and (iii) (i), (iii) and (iv) (ii), (iii) and (iv) 8. Which of the following elements would lose an electron easily? Na K Mg Ca 9. Which among the following elements has the largest atomic radii? Ca K Na Mg 10. Which of the following statements is not a correct statement about the trends when going from left to right across the periods of periodic table? The elements become less metallic in nature The number of valence electrons increases The oxides become more acidic The atoms lose their electrons more easily Loading … Question 1 of 10
