Solved Past Papers MCQs of MDCAT for the preparation of Medical and Dental College Admission Test and other medical tests.
Q.76 The substitution of a ‘-H’ by ‘-NO2‘ group in benzene is called:
A) Nitration C) Sulphonation
B) Ammunolusis D) Reduction of benzene
Q.77 When purely alcoholic solution of sodium/potassium hydroxide and halogenoalkanes are reacted an alkene is formed, what is the mechanism of reaction?
A) Elimination C) Debromination
B) Dehydration D) Reduction of benzene
Q.78 The organic compound carbon tetrachloride is used as:
A) Lubricant C) Oxidant
B) Solvent D) Plastic
Q.79 An alcohol is converted to an aldehyde with same number of carbon atoms as that of alcohol in the presence of K2Cr2O7/H2SO4 the alcohol is:
A) CH3Cl(CH)2OH C) (CH3)3COH
B) CH3CH2CH2OH D) (CH3)3CHOH
Q.80 The %age of nitrogen in ammonium nitrate is:
A) 46% C) 33%
B) 82% D) 13%
Q.81 Which enzyme is involved in the fermentation of glucose:
A) Zymase C) Urease
B) Invertase D) Diastase
Q.82 Relative acidic strength of alcohol, phenol, water and carboxylic acid is:
A) Carboxylic acid > Alcohol > Phenol > Water C) Phenol > Carboxylic acid > Alcohol > Water
B) Carboxylic acid > Phenol > Water > Alcohol D) Water > Alcohol > Phenol > Carboxylic acid
Q.83 Consider the following reaction:
R―CHO + 2[Ag(NH3)2]OH → R―COONH4 + 2Ag + 2NH3 + H2O
This reaction represents one of the following tests.
A) Fehling test C) Ninhydrin test
B) Benedict test D) Tollens test
Q.84 In many of its properties __________ is quite different from the other alkali metals.
A) Li. C) Na.
B) Be. D) K.
Q.85 Which element forms long chains alternating with oxygen?
A) Carbon. C) Nitrogen.
B) Silicon. D) All of these.
Q.86 CH3COOH + PCl5 → ?
The products of the above reaction are:
A) CH3COl + POCl3 + HCl C) CH3Cl + POCl3 + HCl
B) CH3COl + POCl2 + HCl D) CH3COCl + POCl3 + H2
Q.87 CH3CN + HCl → A + B (in the presence of water)
In the above reaction, A and B are:
A) Acetic acid and acid amide C) Acetic acid and methyl chloride
B) Acetic acid and ammonia D) Acetic acid and ammonium chloride
Q.88 Consider the following reaction:
CH3COOH + Mg (metal) → ?
What product will form?
A) Magnesium formate C) Magnesium ion
B) Magnesium acetate D) Carboxylate ion
Q.89 The ―NH―CO is called:
A) Amide group C) Protein linkage
B) Amino group D) Peptide linkage
Q.90 Paramagnetic behavior of an atom, ion or molecule is due to presence of
A) Unpaired electrons C) Protons
B) Paired electrons D) Neutrons
Q.91 Which of the following has an amino R-group?
A) Lysine C) Valine
B) Proline D) Alanine
Q.92 At intermediate value of pH, amino acids form Zwitter ions containing:
A) ―N+H3 and COO― C) ―N+H3 and COOH
B) ―NH3 and COO― D) ―NH3 and COOH
Q.93 When hexane dioic acid is heated with hexamethylene diamine, the compound formed is:
A) Polypeptide C) Ester
B) Addition polymer D) Nylon 6,6
Q.94 A polymer in which the number of amino acid residue is greater than 100 or molecular mass is greater than 1000, is known as:
A) Protein C) Dipeptide
B) Polypeptide D) Tripeptide
Q.95 The average bond energy of C-Br is:
A) 228 kJmol-1 C) 250 kJmol-1
B) 200 kJmol-1 D) 290 kJmol-1
Q.96 Glucose and fructose are common examples of:
A) Pentoses C) Heptoses
B) Hexoses D) Butoses
Q.97 The reaction between fats and caustic soda is called:
A) Hydrogenolysis C) Carboxylation
B) Fermentation D) Saponification
Q.98 Macromolecules are described as large molecules built up from small repeating units known as:
A) Monomers C) Metameres
B) Isomers D) Tautomer
Q.99 Polyvinyl chloride is an example of:
A) Addition polymer C) Biopolymer
B) Condensation polymer D) Thermosetting polymer
Q.100 Terylene, a polyester is an example of:
A) Biopolymer C) Condensation polymer
B) Lipids D) Addition polymer
READ MORE:
- Solved Past Papers MCQs of MDCAT 1
- Solved Past Papers MCQs of MDCAT 2
- Solved Past Papers MCQs of MDCAT 3
