Test-MCQ Class 10-NCERT -Science-Chapter 5-Test-3 Chapter 5: Periodic Classification of Elements Multiple Choice Questions No of Questions : 17 Marks: 17 Please enter your email: 1. Upto which element, the Law of Octaves was found to be applicable. Cobalt Potassium Calcium Oxygen 2. Which of the following statements about the Modern Periodic Table is correct: It has 18 horizontal rows known as Periods It has 7 horizontal rows known as Groups It has 18 vertical columns known as Groups It has 7 vertical columns known as Periods 3. Where would you locate the element with electronic configuration 2,8 in the Modern Periodic Table? Group 8 Group 10 Group 2 Group 18 4. Which of the following gives the correct increasing order of the atomic radii of O, F and N ? N, F, O O, N, F F, O, N O, F, N 5. Which of the following elements does not lose an electron easily. F Na Mg Al 6. Arrange the following elements in the order of their increasing nonmetallic character Li, O, C, Be, F F < O < C < Be < Li F < O < C < Be < Li Li < Be < C < O< F F < O < Be < C < Li 7. Three elements B, Si and Ge are metal, non-metal and metalloid respectively metalloids non metals metals 8. On moving from left to right in a period in the periodic table, the size of the atom. first decreases and then increases decreases increases does not change appreciably 9. When we move from left to right across a period , the electron affinity. increases approach has zero decreases remains the same 10. Group 17 elements are also called as alkali metals alkaline earth metals halogens noble gases 11. Which of the following elements is a semi – metal ? silicon chlorine sodium aluminium 12. Which of the following is a dobereiner s triad? ne, ca, na na,br ,ar li,na ,k h2,n2,o2 13. The most metallic element in the fourth period is: S K Ca P 14. The longest and the shortest periods are: 1&6 1&7 2&6 6&1 15. Which of the following hydroxides are most basic: Ca(OH)2 Ba(OH)2 Mg(OH)2 Be(OH)2 16. The law of triads is not applicable on cl, br , l na, k, rb s, se, te ca, sr, ba 17.Elements with atomic number 15 and mass number 31 is present in: Group 15 and period 4 Group 15 and period 3 Group 5 and period 4 Group 5 and period 3 Please Enter Your Name, School Name & Class in the given below box and submit: ( results will be shown within few moments after submit on same page ) Loading … Question 1 of 18
