NUST NET 1 SAMPLE CHEMISTRY QUESTIONS

National University of Sciences and Technology (NUST) is a very well-known and top rated engineering university of Pakistan. NUST was founded in 1991 with mission of providing quality education and invest in research. So far in a very short period of time they are able to earn very good name in world. NUST provides wide range of programs to accommodate students from every field which also includes engineering programs offered to DAE candidates. Due to their high standards their fee structure is also high, but for poor people they have scholarship facilities (Need based Scholarship). Minimum 60% marks are required to become eligible for NUST NET test. NUST NET 1 test will be conducted in Dec 2019. Every year thousands of students apply for NUST NET, all candidates should work very hard to get admission in NUST.

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TOPIC:

Electrochemistry

QUESTION:

The oxidation of oxygen in peroxides is?

OPTIONS:

  • +1
  • -1
  • +2
  • -2

CORRECT OPTION:

-1

EXPLANATION:

Peroxides include hydrogen peroxide, H2O2. This is an electrically neutral compound and so the sum of the oxidation states of the hydrogen and oxygen must be zero.

TOPIC:

Reaction Kinetics

QUESTION:

What is the half-life of a third order reaction if k = 1 and a = 0.2 M?

OPTIONS:

  • 24.5 s
  • 28.5 s
  • 32.5 s
  • 37.5 s

CORRECT OPTIONS:

37.5 s

EXPLANATION:

[t1/2] = 1.5/ka2;

Putting values [t1/2] = 1.5/(0.2)2 = 37.5 s.

TOPIC:

Solutions

QUESTION;

If we have 450g of a NaCL solution that is 35 NaCL w/w %. What is the mass of NaCL?

OPTIONS;

  • 128.5 g
  • 129.5 g
  • 157.5 g
  • 131.5 g

CORRECT OPTIONS:

157.5 g

EXPLANATION:

% by weight = (Mass of solute/Mass of solution) * 100

35 = (X/450) *100

X = 35 * 450/100 = 157.5 g

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