9th standard Science Chapter 6

9th Standard Science quiz Chapter-6

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9th standard science Chapter 6

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Q.51 Which of the two will be chemically more reactive, Sulphur(S) with atomic number 16 or Chlorine (Cl) with atomic number 17?

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Q.52 Which of the following elements does not exhibit the electrovalencey?

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Q.53

Which of the following statements is incorrect about the structure of an atom?

i. The whole mass of an atom is concentrated in the nucleus

ii. The atom is an indivisible particle

iii. The atom as a whole is neutral

iv. All the atoms are stable in their basic state

Choose the right option among the following:

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Q.54 Which scientist gave the concept of fixed energy levels around the nucleus?

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Q.55  What prevents an atom from being collapsed?

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Q.56 Which of the following pairs are isobars?

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Q.57 Which of the following is an incorrect statement in reference with observation in Rutherford’s α-particle scattering experiment?

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Q.58 Which radioactive element is used in the treatment of cancer?

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Q.59

Why do most of the elements try to participate in the chemical combinations?

i. To gain more electrons

ii. To achieve Inert Gas configuration

iii. To complete their octet

iv. To complete their inner shells

Choose the correct option among the following

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Q.60  A cell will swell up if

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