SSC Selection Post 2022 PYQ — Question 39

SSC Selection Post - Graduation Level - 2 Aug 2022 - Shift 3 • General Awareness • Q39

Read the given passage and answer the question that follows.

Between him and Darcy there was a very steady friendship, in spite of great opposition of character. Bingley was endeared to Darcy by the easiness, openness, and ductility of his temper, though no disposition could offer a greater contrast to his own, and though with his own he never appeared dissatisfied. On the strength of Darcy’s regard Bingley had the firmest reliance, and of his judgment the highest opinion. In understanding, Darcy was the superior. Bingley was by no means deficient, but Darcy was clever. He was at the same time haughty, reserved, and fastidious, and his manners, though well bred, were not inviting. In that respect his friend had greatly the advantage. Bingley was sure of being liked wherever he appeared, Darcy was continually giving offence. The manner in which they spoke of the Meryton assembly was sufficiently characteristic. Bingley had never met with pleasanter people or prettier girls in his life; everybody had been most kind and attentive to him; there had been no formality, no stiffness; he had soon felt acquainted with all the room; and as to Miss Bennet, he could not conceive an angel more beautiful. Darcy, on the contrary, had seen a collection of people in whom there was little beauty and no fashion, for none of whom he had felt the smallest interest, and from none received either attention or pleasure. Miss Bennet he acknowledged to be pretty, but she smiled too much. Mrs. Hurst and her sister allowed it to be so—but still they admired her and liked her, and pronounced her to be a sweet girl, and one whom they should not object to know more of. Miss Bennet was therefore established as a sweet girl, and their brother felt authorised by such commendation to think of her as he chose.

In 1662, who described the equation P1V1 = P2V2, where P1 and V1 are the initial pressure and volume values, and P2 and V2 are the pressure and volume values of the gas after the transformation?

Show answer & explanation

Correct answer: C

Explanation

The correct answer is option 3 i.e. Robert Boyle.

The Anglo-Irish scientist Robert Boyle described the equation P₁V₁ = P₂V₂ in 1662, establishing what is now called Boyle’s Law. This law states that at constant temperature, the pressure of a gas is inversely proportional to its volume. Boyle’s experimental work with air and mercury columns gave birth to this quantitative relationship, making it one of the earliest gas laws. His work marked a significant advancement in the field of physics and chemistry and helped in the foundation of modern thermodynamics.

Other Options:

  • Joseph Gay-Lussac – Known for Gay-Lussac’s Law related to pressure and temperature.

  • Amedeo Avogadro – Proposed Avogadro’s Law in 1811, relating volume and number of gas particles.

  • John Dalton – Known for Dalton’s Atomic Theory.