Solved MCQs Past Papers MDCAT Chemistry Entry Test
Q.1 Each molecule of haemoglobin is made up of nearly:
A) 11000 atoms C) 10000 atoms
B) 6600 atoms D) 6800 atoms
Q.2 A limiting reactant is the one which:
A) Is mostly a cheaper substance and taken in larger quantity
B) Is consumed earlier and controls the amount of product formed in a chemical reaction
C) Gives greatest number of moles of products
D) Is left behind after the completion of reaction
Q.3 The acid which can be purified by the sublimation is:
A) Acetic Acid C) Oxalic Acid
B) Benzoic Acid D) Citric Acid
Q.4 Paper chromatography is used for:
A) Elemental Analysis C) Qualitative Analysis
B) Industrial Purification D) Structural Analysis
Q.5 In the process of respiration there is application of:
A) Dalton’s Law C) Boyle’s Law
C) Charles’s Law D) Graham’s Law
Q.6 The formula of acrylonitrile is:
A) CH3=CH―CN C) CH3―CH2―CN
B) CH3―CH2―CH2―CN D) CH3―CN
Q.7 Which compound is the most reactive one?
A) Ethyne C) Benzene
B) Ethane D) Ethene
Q.8 Grignard reagents are prepared by the reaction of magnesium metal with alkyl halides in the presence of:
A) Dry Ether C) Alcohol
B) CS2 D) CCl4
Q.9 When n-butyl magnesium iodide is treated with water, the product is:
A) n-butane C) Propane
B) Iso-butane D) Alcohol
Q.10 Phenol can be distinguished from alcohol by adding:
A) Br2/H2O C) FeSO4
B) Cl2/H2O D) FeCl3
Q.11 In the conversion of ethylene into acetaldehyde, cupric chloride acts as:
A) Initiator C) Catalyst
B) Promoter D) Reactant
Q.12 When acetone is heated in the presence of K2Cr2O7/H2SO4, the products formed are;
A) Maleic Acid and Fumaric Acid C) Formic Acid and Oxalic Acid
B) Acetic Acid and Formic Acid D) Oxalic Acid and Acetic Acid
Q.13 Which acid is used in the manufacture of plastics?
A) Carbolic Acid C) Carbonic Acid
B) Acetic Acid D) Oxalic Acid
Q.14 In conjugated protein molecules, the protein is attached or conjugated to some non-protein group which are called:
A) Prosthetic Group C) Hydrogen Bonding
B) Aldehyde Group D) Peptide Linkage
Q.15 Micronutrients are required in quantity ranging from:
A) 6 – 200 g per acre C) 4 – 40 g per acre
B) 6 – 200 kg per acre D) 4 – 40 kg per acre
Q.16 Potassium fertilizers are especially useful for:
A) Mango C) Wheat
B) Tobacco D) Rice
Q.17 The yellowish colour of photochemical smog is due to the presence of:
A) Nitrogen dioxide C) Nitrous oxide
B) Dinitrogen trioxide D) Nitric oxide
Q.18 The incarnation process can reduce the volume of the water by:
A) One half C) One third
B) Not affected D) Two third
Q.19 __________% of the known universe is in the plasma state.
A) 30 C) 50
B) 99 D) 80
Q.20 Splitting of spectral lines in closely spaced lines in presence of magnetic field is called:
A) Stark Effect C) Photoelectric Effect
B) Zeeman Effect D) Compton Effect
Q.21 A bond is not formed:
A) When both forces become equal to each other C) When attraction forces dominate repulsive forces
B) When repulsive forces become equal to zero D) When repulsive forces dominate attraction forces
Q.22 If the electronegativity difference between bonded atoms is zero, the bond between the two atoms is:
A) Polar C) Non-polar
B) Partially Ionic D) Both B and C
Q.23 VSEPR theory helps in explaining:
A) Attraction between atoms C) Nature of bond
B) Size of molecule D) Shape of molecule
Q.24 The heat of hydration decreases with the increase in:
A) Number of neutrons C) Size of atomic radii
B) Size of cations D) Number of electrons
Q.25 Stronger the oxidizing agent, greater is the:
A) Redox Potential C) Oxidation Potential
B) emf of the cell D) Reduction Potential
Q.26 The emf produced by Galvanic Cell is known as:
A) Redox Potential C) Cell Potential
B) Oxidation Potential D) None of the above
Q.27 In nickel-cadmium battery, the cathode is composed of:
A) Cd C) Ni
B) Ni(OH)2 D) NiO2