Skip to content
Independent guidance for Pakistan's healthcare students
Student forum · Coming soonAggregate calculator
Medical AdmissionPAKISTAN
Practice MDCAT

LEARN AT YOUR OWN PACE

MDCAT Question Bank

Think through each question, then reveal the answer and explanation.

Take a practice test →

Use the MDCAT Question Bank to study by subject and try each question yourself.
Click Show Answer to check the correct choice, then take a practice test when you’re ready.

1009 available questions

Chemistry · Question 61

According to Avogadro's law, .899g of 1dm3 H2 and 1.4384 g of 1 dm3 O2 have number of moleecules.

  1. Same
  2. Different
  3. H2 has more
  4. O2 has more
Show AnswerHide Answer

Correct answer: A

Same

Chemistry · Question 62

The first lonization energy of Al is less than Mg. This is due to:

  1. Electron in the 3p' of Al
  2. Al is less metallic than Mg
  3. Mg comes first than Al
  4. lonization energy from Mg to Al decreases
Show AnswerHide Answer

Correct answer: A

Electron in the 3p' of Al

Chemistry · Question 63

What is the octane number assigned to n-heptane on the standard octane-rating scale?

  1. 0
  2. 100
  3. 40
  4. 98
Show AnswerHide Answer

Correct answer: A

0

The reference fuel n-heptane is assigned an octane number of 0, while isooctane is assigned 100.

Chemistry · Question 64

All are aliphatic carboxylic acid expect?

  1. Benzoic acid
  2. Methanoic acid
  3. Ethanoic acid
  4. Acetic acid
Show AnswerHide Answer

Correct answer: A

Benzoic acid

Chemistry · Question 65

Optical activity of a compound is measured by an instrument called __________________

  1. Hydrometer
  2. Barometer
  3. Calorimeter
  4. Polarimeter
Show AnswerHide Answer

Correct answer: D

Polarimeter

Chemistry · Question 66

Which of the following family is linked with plant ashes?

  1. Nitrogen Family
  2. Alkali metals
  3. Rare earth metals
  4. Oxygen Family
Show AnswerHide Answer

Correct answer: B

Alkali metals

Chemistry · Question 67

The compounds which are formed by the replacement of one of the H of water by a alkyal grop are called as ______________?

  1. Ethers
  2. Phenols
  3. Alcohols
  4. Carboxylic acids
Show AnswerHide Answer

Correct answer: C

Alcohols

Chemistry · Question 68

If the solubility product (K,..) value is large, the salt in water is:

  1. More soluble
  2. Less soluble
  3. Moderately soluble
  4. No concentration
Show AnswerHide Answer

Correct answer: A

More soluble

Chemistry · Question 69

Identify the compound given below which has bonds formed by overlapping of sp and p
orbitals:

  1. BeCl2
  2. C2H2O2
  3. C2D6O2
  4. C2H3O2
Show AnswerHide Answer

Correct answer: D

C2H3O2

Chemistry · Question 70

Propyne reacts with aqueous sulphuric acid in the presence of Hg5O. to form:

  1. Acetone
  2. 1-Propano
  3. 2-Propanol
  4. Acetaldehyde
Show AnswerHide Answer

Correct answer: A

Acetone