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. Potassium Cobalt 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 18 vertical columns known as Groups It has 7 horizontal rows 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 10 Group 8 Group 18 Group 2 4. Which of the following gives the correct increasing order of the atomic radii of O, F and N ? O, N, F N, F, O O, F, N F, O, N 5. Which of the following elements does not lose an electron easily. Na Mg F Al 6. Arrange the following elements in the order of their increasing nonmetallic character Li, O, C, Be, F F < O < C < Be < Li Li < Be < C < O< F F < O < C < Be < Li F < O < Be < C < Li 7. Three elements B, Si and Ge are metals metal, non-metal and metalloid respectively non metals metalloids 8. On moving from left to right in a period in the periodic table, the size of the atom. does not change appreciably increases decreases first decreases and then increases 9. When we move from left to right across a period , the electron affinity. decreases increases remains the same approach has zero 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 ? aluminium chlorine sodium silicon 12. Which of the following is a dobereiner s triad? na,br ,ar li,na ,k ne, ca, na h2,n2,o2 13. The most metallic element in the fourth period is: K Ca S P 14. The longest and the shortest periods are: 6&1 2&6 1&6 1&7 15. Which of the following hydroxides are most basic: Ca(OH)2 Be(OH)2 Mg(OH)2 Ba(OH)2 16. The law of triads is not applicable on na, k, rb cl, br , l s, se, te ca, sr, ba 17.Elements with atomic number 15 and mass number 31 is present in: Group 15 and period 3 Group 15 and period 4 Group 5 and period 3 Group 5 and period 4 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
