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  • BMAT 2019 Section 2 Q10

     Paris Pitsinikos 2 सप्ताह, 6 दिन पहले 4 months, 1 week ago 2 सदस्य · 2 Posts
  • Nicolas Sanchez

    जून 26, 2021 at 6:06 पूर्वाह्न
    1023 जवाब
    205950 XP
    Contributions: EnterMedSchool Donor टीम मैनेजर स्वयंसेवक
    Reputation: स्तर 7

    Consider the non-radioactive elements in Group 1.
    Which of the following statements is/are correct about the element with the largest atomic number?

    1 It has the most vigorous reaction with cold water.
    2 Its atom has the same number of electrons in its highest occupied energy level as other members of the group.

    3 It is the most readily oxidised.

    A. none of them
    B. 1 only
    C. 2 only
    D. 3 only
    E. 1 and 2 only
    F. 1 and 3 only
    G. 2 and 3 only
    H. 1, 2 and 3

  • Paris Pitsinikos

    जुलाई 21, 2021 at 5:29 अपराह्न
    331 जवाब
    137970 XP
    Contributions: टीम मैनेजर EnterMedSchool Donor स्वयंसेवक
    Reputation: Level 6
    Down Accepted answer

    Group 1 is the group of the alkali metals. The reactivity trend in the group increases from top to bottom. Therefore, the element found at the bottom of the group, which is also the element with the largest atomic number in the group, is the more reactive.

    1. All alkali metals react aggressively with water. The fact that it is also the most reactive of the group, makes its reaction with water the most vigorous. This is correct.

    2. The largest atomic number equals the largest number of electrons. The more electrons, the higher the energy levels of the shells they will occupy. This is correct.

    3. It is the most reactive. Also, it has an oxidation number of +1 since it belongs to the alkali metals. So, it is the most readily oxidised. This is correct.

    The answer is H.

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0 of 0 posts June 2018