SarkariPYQ

SSC CHSL 2023 PYQ — Question 113

SSC CHSL Tier II - 26 Jun 2023 - Shift 1 • General Awareness • Q113

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In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.

Astronomers have discovered 62 new moons orbiting the ringed planet Saturn. Though some of the moons had been (1)________ as early as 2019, it takes more than sighting an object close to a planet to (2) ________ it is a moon and not an asteroid making a brief close passage to that planet.

Performing a painstaking (3) ________ of matching objects detected on different nights over the course of 24 months, the team tracked 63 objects that they ended up confirming as moons. One of (4) ________ satellites was revealed back in 2021, with the remaining 62 moons gradually announced over the past few weeks.

Which of the following is the correct descending order of nitrate ion (N03-), chloride ion (Cl-), bromide ion (Br-) and iodine ion (I-) as per their basic strength?

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Correct answer: B

Explanation

The correct answer is option 2 i.e.NO3>Cl>Br>I

  • The correct descending order of nitrate ion (NO3-), chloride ion (Cl-), bromide ion (Br-), and iodine ion (I-) as per their basic strength is:
  • I < Br < Cl < NO3
  • In this order, iodine ion (I-) is the strongest base, followed by bromide ion (Br-), chloride ion (Cl-), and nitrate ion (NO3-).
  • Basic strength is typically determined by the ability of an ion to accept or donate a pair of electrons, with larger and less electronegative ions being stronger bases.
  • In this case, iodine is the largest and least electronegative among the ions listed, making it the strongest base.