Solved Past Papers MCQs of MDCAT for the preparation of Medical and Dental College Admission Test and other medical tests.
Q.76 KMnO4 acts as a
A) Reducing agent C) Germicide
B) Excellent precipitating reagent D) Oxidizing agent
Q.77 A gasoline of higher octane number can be obtained by
A) Oxidative cleavage C) Catalytic cracking
B) Thermal cracking D) Steam cracking
Q.78 Ethyne molecule is formed when two carbon atoms joined together to form a sigma bond by
A) sp-s overlap C) 2py-2py overlap
B) sp3-sp3 overlap D) sp-sp overlap
Q.79 Symmetrical alkanes can be produced by
A) Sabatier Sender’s Reaction C) Reduction Reaction
B) Hydrogenolysis Reaction D) Kolbe’s Electrolytic Reaction
Q.80 The catalyst used for the preparation of acrylonitrile is
A) Cu2Cl2 and NH4Cl C) Cu2Cl2 and NH4OH
B) Al2O3 and NH4Cl D) Cu2Cl2 and Al2O3
Q.81 When a hydrogen atom is removed from benzene, the group left behind is called
A) Alkyl group C) Benzyl group
B) Phenyl group D) Methyl group
Q.82 The introduction of NO2 group in benzene ring is called ‘Nitration’. The nitration of benzene takes place when it is heated with a 1:1 mixture of _________ at 50 oC-55 oC.
A) Conc. HNO3 and conc. HCl C) Conc. HNO3 and H3PO4
B) Conc. HNO3 and conc. Acetic acid D) Conc. HNO3 and conc. H2SO4
Q.83 During SN2 reactions, configuration of the alkyl halide molecule:
A) Gets inverted C) Depends upon the carbon atom
B) Remains same D) Depends upon the electronegativity of halide
Q.84 Grignard reagents are prepared by the reaction of magnesium metal with alkyl halides in the presence of
A) Dry Ether C) Alcohol
B) Sodium Lead Alloy D) Water
Q.85 Methanol is prepared from carbon monoxide and hydrogen. The catalyst used for this reaction is
A) ZnO + CoO2 C) ZnO + Ag2O
B) ZnO + CuO D) Cr2O3 + ZnO
Q.86 Ethanol reacts with Ammonia to produce ethyl amine, the catalyst is
A) ZnCl2 C) C6H5N
B) ThO2 D) Cr2O3
Q.87 Dissociation constant of phenol is
A) 1.2 x 10-10 C) 1.3 x 1010
B) 1.2 x 1010 D) 1.3 x 10-10
Q.88 Dry distillation of a mixture of calcium salts of formic acid and acetic acid results into the formation of
A) Formaldehyde C) Calcium acetate
B) Acetaldehyde D) Sodium acetate
Q.89 Hydrolysis of cyano group by an aqueous acid results into
A) Carboxylic Acid C) Cyanohydride
B) Acid Amide D) Formaldehyde
Q.90 Brick red precipitates are formed when aldehydes react with
A) Sodium borohydride C) Sodium nitroprusside
B) Sodium bisulphite D) Fehling’s solution
Q.91 The nature of the amino acid ‘lysine’ is
A) Neutral C) Amphoteric
B) Acidic D) Basic
Q.92 Which of the following compounds, in the form of aqueous solution, on reaction with sodium carbonate will produce carbon dioxide gas?
A) H3C-COO-C2H5 C) H3C2-CO-OH
B) H3C2-COO-CH3 D) H3C2-COO-C2H5
Q.93 Collagen and albumin are
A) Simple proteins C) Polyamides
B) Derived proteins D) Polysaccharides
Q.94 Urea is produced by the reaction of liquid ammonia with
A) CO2 C) CaO
B) CO D) C
Q.95 The calcium sulpho-aluminate is
A) Co.Al2O3.3CaSO4.6H2O C) 3Ca.Al2O3.3CaSO4.2H2O
B) 3Ca.Al2O3.CaSO4.2H2O D) 3Ca.Al2O3.3CaSO4.6H2O
Q.96 The coagulant used in raw water to precipitate suspended impurities is
A) Caustic soda C) Alum
B) Lime water D) Soda ash
Q.97 The whiteness of the recycled newspaper is improved by treating it with:
A) Sodium hydroxide C) Super oxides
B) Peroxides D) Normal oxides
Q.98 One mole of any gas at standard temperature and pressure (STP) occupies a volume of
A) 20.414 dm3 C) 22.414 cm3
B) 22.414 dm3 D) 23.414 dm3
Q.99 The relative abundance of the isotopes of the elements can be determined by:
A) Mass Spectrometry C) Chromatography
B) X-rays D) Solvent Extraction
Q.100 If we are given the mass of one substance, we can calculate volume of other substances and vice a versa with the help of balanced chemical equation. This is called
A) Mass-mass relationship C) Mole-volume relationship
B) Mass-mole relationship D) Mass-volume relationship
READ MORE:
- Solved Past Papers MCQs of MDCAT 1
- Solved Past Papers MCQs of MDCAT 2
- Solved Past Papers MCQs of MDCAT 4
