UHS SAMPLE CHEMISTRY QUESTIONS

UHS stands for University of Health Sciences, it is a public university operating from Lahore. It is normally known as best research university with a mission to improve health care facilities in Pakistan. UHS is also a regulatory authority for admissions in Punjab. All those students who want to take admission in medical or dental colleges should appear in MCAT. MCAT test consist of 220 MCQ’s divided into four subjects Physics, Chemistry, Biology and English. MCAT entry test is very difficult and students need to work relay hard in order to secure their admission in public sector.

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SAMPLE CHEMISTRY QUESTIONS

TOPIC:

Solutions

QUESTION:

If 0.5 g of a solute (molar mass 100 g mol-1) in 25 g of solvent elevates the boiling point by 1 K. the molar boiling point constant of the solvent is?

OPTIONS:

  • 0.2
  • 2
  • 5
  • 8

CORRECT OPTION:

5

EXPLANATION:

∆Tb = kbm

M = 1000W2/M2W1 = (1000*0.5) / (100*25) = 1/5

Now 1 = kb * 1/5 or kb = 5

TOPIC:

Transition Elements

QUESTION:

Transition elements from complexes due which of the following reason?

OPTIONS:

  • Para magnetism
  • Vacant d-orbitals
  • Large nuclear charge
  • Small cation size

CORRECT OPTION:

Vacant d-orbitals

EXPLANATION:

Vacant orbitals of central metal atom or iron are filled by ligands to form metal complexes.

In Chemistry, a coordination complex or metal complex consists of a central atom or ion which is usually metallic and is called the coordination center and a surrounding array of bound molecules or ions that are in turn known as ligands or complexing agents. Many metal containing compounds, especially those of transition metals are coordination complexes.

TOPIC:

Solutions

QUESTION:

500 ml of 0.75 w/v % NaCl solution would contain how many grams of NaCl?

OPTIONS:

  • 0.75 g
  • 1.5 g
  • 3.75 g
  • 4.8 g

CORRECT OPTION:

3.75 g

EXPLANATION:

w/v % = (mass of solute/volume of solution) * 100

0.75 = (M/500) * 100 = 0.0075 * 100 or M = 0.0075 * 500 = 3.75 g of NaCl

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SAMPLE CHEMISTRY QUESTIONS

 


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