NUST NET SAMPLE CHEMISTRY QUESTIONS

National University of Sciences and Technology NUST is one of the top rated engineering universities of Pakistan and also very well known around the world. NUST NET-1 registrations are open until 18th of December 2018, NUST NET-1 entry test will be conducted on 28th December 2018 on words. Due to quality of education and facilities provided to students NUST fee structure is a bit high as compared to other universities but they also provide many scholarships to their students including need based scholarship. NUST also provide a vast range of Undergraduate Programs for applicants other than engineering. Eligibility criteria to apply for NUST is only 60% in FSc. Competition is very tough at NUST, so applicants must be fully prepared if they want to secure their admission.

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SAMPLE CHEMISTRY QUESTIONS

TOPIC:

Basics of Chemistry

QUESTION:

How many number of molecules are present in 9.8 g of ice?

OPTIONS:

  • 02 * 1022
  • 02 * 1023
  • 01 * 1023
  • 01 * 1022

CORRECT ANSWER:

3.01 * 1023

EXPLANATION:

Number of molecules of water = (Mass of water in gram / Molar mass of water in g/mol) * Avagadro’s no,

= (9.8/18) * 6.02 * 1023 = 3.01 * 1023

TOPIC:

Chemical Bonding

QUESTION:

If the 2nd ionization energy of an element is 1200 and the 3rd ionization energy of the same element is 5000. What will be the valency of this element?

OPTIONS:

  • 1
  • 2
  • 3
  • 4

CORRECT ANSWER:

2

EXPLANATION:

The gaps in the 1st, 2nd, 3rd and higher ionization energies helps to guess the valency of an element. If there is sufficient gap between the first I.E and 2nd I.E, then the element shows valency of one. But in this case, there is a sufficient gap between 2nd and 3rd ionization energies so the valency will be two.

TOPIC:

Reaction Kinetics

QUESTION:

For any reaction A———-> B, which of the following statement is correct regarding the rate of reaction?

OPTIONS:

  • d[A]/dt = d[B]/dt
  • -d[A]/dt ≠d[B]/dt
  • d[A]/dt = -d[B]/dt
  • -d[A]/dt = d[B]/dt

CORRECT ANSWER:

-d[A]/dt = d[B]/dt

EXPLANATION:

Choice D is the most accurate representation as the concentration of A would decrease (hence minus sign) and the concentration of B would increase (hence + sign) with time.

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SAMPLE CHEMISTRY QUESTIONS


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