9th standard Science Chapter 6 November 30, 2020December 26, 2020wefru 9th Standard Science quiz Chapter-6 0 Created on November 30, 2020 By wefru 9th standard science Chapter 6 TEST YOUR SKILLS 1 / 10 Q.51 Which of the two will be chemically more reactive, Sulphur(S) with atomic number 16 or Chlorine (Cl) with atomic number 17? Chlorine Sulphur Both are equally reactive Can’t say 2 / 10 Q.52 Which of the following elements does not exhibit the electrovalencey? Sodium Calcium Carbon Chlorine 3 / 10 Q.53Which of the following statements is incorrect about the structure of an atom?i. The whole mass of an atom is concentrated in the nucleusii. The atom is an indivisible particleiii. The atom as a whole is neutraliv. All the atoms are stable in their basic stateChoose the right option among the following: (i) and (iii) only (ii) (ii) and (iv) none of these 4 / 10 Q.54 Which scientist gave the concept of fixed energy levels around the nucleus? Ernest Rutherford Neils Bohar J.J.Thomsan None of these 5 / 10 Q.55 What prevents an atom from being collapsed? The nuclear forces Movement of electrons in discrete energy levels The electron-electron repulsions All of these 6 / 10 Q.56 Which of the following pairs are isobars? 17Cl35 & 17Cl37 18Ar40 & 20Ca40 6C12 & 6C14 None of these 7 / 10 Q.57 Which of the following is an incorrect statement in reference with observation in Rutherford’s α-particle scattering experiment? Some of the α-particles rebound after hitting the gold foil Some of the particles deflected from their path Some of the particles not pass through the gold foil Most of the particles pass straight through the gold foil 8 / 10 Q.58 Which radioactive element is used in the treatment of cancer? Iodine-131 Uranium-234 Plutonium-239 Cobalt-60 9 / 10 Q.59Why do most of the elements try to participate in the chemical combinations?i. To gain more electronsii. To achieve Inert Gas configurationiii. To complete their octetiv. To complete their inner shellsChoose the correct option among the following Both (i) & (iii) Both (ii) & (iii) Only (ii) Both (i) & (iv) 10 / 10 Q.60 A cell will swell up if The concentration of water molecules in the cell is higher than the concentration of water molecules in the surrounding medium. The concentration of water molecules in the surrounding medium is higher than the concentration of water molecules in the cell. The concentration of water molecules is same in the cell and in the surrounding medium The concentration of water molecules does not matter. Your score isThe average score is 0% LinkedIn Facebook Twitter VKontakte 0% Restart quiz