MDCAT MCQs for Entry Test with Answers Page 3 | Mcat Chemistry mcqs chapter wise pdf with answers

written by Assad Javaid | September 7, 2021

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101. By a chemical reaction systems attain an energy state which is which among the following: 

  1. Higher in energy 
  2. Lower in energy  
  3. Equal in energy 
  4. Balanced in energy 

102. The internuclear distance at which the energy of the two bonded atoms is at minimum is called which among the following: 

  1. Bond length 
  2. Equilibrium bond distance  
  3. Equilibrium distance 
  4. Bond distance 

103. The potential energy of the approaching atoms increase if repulsive forces which among the following: 

  1. Decrease 
  2. Increase  
  3. Remain un-changed 
  4. Become zero 

104. If a chemical bond in not formed, the potential energy of the atoms is which among the following: 

  1. Remain same 
  2. Decreased 
  3. Increased  
  4. Un-changend 

105. When the potential energy of approaching atoms increases, repulsive forces also increase, the chemical bond is which among the following: 

  1. Formed 
  2. Broken 
  3. Un-changed 
  4. Not formed  

106. When a chemical bond is formed the energy of two atoms will be which among the following: 

  1. Maximum 
  2. Usual 
  3. Minimum  
  4. Normal 

107. The attractive force that holds atoms together in molecules is called which among the following: 

  1. Bond 
  2. Force of attraction 
  3. Chemical bond  
  4. Electrostatic force 

108. During the process of chemical bonding, atoms try to attain which among the following: 

  1. Stable configuration 
  2. Simple configuration 
  3. Noble gas configuration  
  4. Unstable configuration 

109. The process of chemical reaction is due to involvement of which among the following: 

  1. Outer electrons 
  2. Valance electrons  
  3. Inner electrons 
  4. Deep electrons 

110. When the potential energy of approaching atoms decreases, the attractive forces among atoms which among the following: 

  1. Remain same 
  2. Decrease 
  3. Increase  
  4. Are un-changed  

111. The using of fuels is the basis that burning of carbon in oxygen produces which among the following: 

  1. Energy 
  2. Heat  
  3. Light 
  4. Electricity 

112. The burning of methane in oxygen is used in which among the following: 

  1. Kitchens  
  1. Flames 
  2. Automobiles 
  3. Engines 

113. In chemistry we usually deal with energy changes of reaction in terms of which among the following: 

  1. Heat 
  2. Electricity 
  3. Light  
  4. Current 

114. Under certain conditions, energy may appear int he form of light, electricity or mechanical work from a which among the following: 

  1. Chemical system  
  2. System 
  3. Reaction 
  4. Reactant 

115. The energy changes of a chemical reaction are measured in which among the following: 

  1. Kil0 joules (KJ) 
  2. Kilo calorie (Kcal) 
  3. Both of them  
  4. None of them 

116. One calorie is equal to which among the following: 

  1. 1.065 J 
  2. 0.418 J 
  3. 2.013 J 
  4. 4.184 J  

117. Other units fro the measurement of heat energy are which among the following: 

  1. Caloric 
  2. Kilowatt hours (kwh) 
  3. British thermal unit (BTU) 
  4. All of them  

 118. The SI unit of energy is which among the following: 

  1. Joule  
  2. Caloric 
  3. Newton 
  4. Watt 

119. When a force of one Newton acts over a distance of one metre, it is which among the following: 

  1. One calorie 
  2. One watt 
  3. One joule  
  4. One pound 

120. The natural cause of a chemical reaction is the tendency to attain which among the following: 

  1. Lowest energy state  
  2. Highest energy state 
  3. Perfection 
  4. Stability 

121. Water placed in closed container at constant temperature has equilibrium of the type which among the following: 

  1. Chemical 
  2. Dynamic  
  3. Static 
  4. Physical 

122. In a chemical equation, a double arrow indicates which among the following: 

  1. Reversible reaction 
  2. Complete reaction 
  3. Incomplete reaction 
  4. Equilibrium  

123. Acetylene when burnt in oxygen produces heat and which among the following: 

  1. Electricity 
  2. Current 
  3. Mechanical work 
  4. Light  

124. In the endothermic reactions, the heat is which among the following: 

  1. Evolved 
  2. Generated 
  3. Absorbed  
  4. Released  

125. Water placed in closed container at constant temperature which among the following: 

  1. Evaporates 
  2. Condenses 
  3. Is at equilibrium  
  4. Reacts 

126. The mechanical work obtained from automobile engines is due to which among the following: 

  1. Combustion process  
  2. Oxidation process 
  3. Reduction process 
  4. Catalytic process 

127. When a part of heat of reaction is used in generating electric current the device is called which among the following: 

  1. Cell 
  2. Galvanic cell  
  3. Electrolytic cell 
  4. Dry cell 

128. The branch of chemistry that deals with thermal energy changes in chemical reactions is called which among the following: 

  1. Thermo 
  2. Dynamics 
  3. Thermo chemistry  
  4. Thermodynamics 

129. The using of fuels is the basis that burning of carbon in oxygen produces which among the following: 

  1. Energy 
  2. Light 
  3. Heat  
  4. Electricity 

130. The burning of methane in oxygen is used in which among the following: 

  1. Kitchens  
  2. Flames 
  3. Automobiles 
  4. Engines 

131. The Minimum Amount Of Energy In Addition To The Average Energy, Which Is Just Sufficient To Convert Reactants To Products, Is Called which among the following: 

  1. Activation Energy  
  2. Internal Energy 
  3. Dissipation Energy 
  4. None of Them 

132. Similar Substance Can Have Different Reaction Rates Under which among the following: 

  1. Same Conditions  
  2. Different Conditions 
  3. Various Conditions 
  4. None of Them 

133. When The Products Are In Lower Energy State Than The Reactants, The Reaction Is which among the following: 

  1. Stable 
  2. Exothermic  
  3. Endothermic 
  4. Ergs 

134. The Rate Constants Of Chemical Reactions Are Strongly Influenced By which among the following: 

  1. Catalyst 
  2. Temperature 
  3. Nature And Concentration Of Reactants 
  4. By All Of Them  

135. In The Exothermic Reactions, The Products Are At Energy Level which among the following: 

  1. Lower Than Reactant 
  2. Equal To Reactants 
  3. Higher Than Reactant  
  4. None of Them 

136. Activation Energy Is The Energy Barrier For The Formation Of which among the following: 

  1. Products  
  2. Activation Complex 
  3. Intermediates 
  4. A & B 

137. Energy of Activation Is Usually Expressed In which among the following: 

  1. Joules  
  2. Calories 
  3. Ergs 
  4. None of them 

138. The Nature Of The Reactant Effects The which among the following: 

  1. Nature Of Product 
  2. Activation Energy 
  3. Rate Of Reaction  
  4. Heat Of The Reaction 

139. Generally Rise Of 10°C Of The Temperature Of A Reaction System, The Reaction Rate which among the following: 

  1. Increases 
  2. Doubles  
  3. Subsides 
  4. Drops 

140. Ire Respect of The Fact That A Chemical Reaction Is Exo Or Endo-Thermal, The Increase In Temperature, Increases The which among the following: 

  1. Reaction Rate  
  2. Potential Energy 
  3. Collisions 
  4. Kinetic Energy 

141. Which one is a separating technique which among the following: 

  1. Deliquescent 
  2. Solvent extraction  
  3. Fluorescence 
  4. Phosphorescence 

142. Which one is used as stationary phase in paper chromatography which among the following: 

  1. Piece of paper 
  2. Alcohol 
  3. Acetone 
  4. Water  

143. The stationary phase can be which among the following: 

  1. Only solid 
  2. Only liquid 
  3. A solid or liquid  
  4. None of above 

144. The solvent is drawn up by the paper because of which among the following: 

  1. The force of gravity 
  2. The water content of the paper 
  3. The capillary action  
  4. All of above 

145. The process of removing a substance form its aqueous solution (not often) by shaker with an organic solvent is termed as which among the following: 

  1. Solvent extortion  
  2. Crystallization 
  3. Sublimate in 
  4. Filtration 

146. Which of the following is not a separation technique which among the following: 

  1. Sublimation 
  2. Boiling  
  3. Filtration 
  4. Solvent extortion 

147. Which mixture can be speared by adding water, stirring and filtering which among the following: 

  1. Barium chloride and sodium chloride 
  2. Copper and magnesium 
  3. Silver chloride and sodium nitrate  
  4. None of above 

148. Slow cooking which among the following: 

  1. Bigger size crystals  
  2. Animal charcoal 
  3. Vacuum dissector 
  4. None of above 

149. Safe and reliable method of drying which among the following: 

  1. Gooch crucible 
  2. Using charcoal 
  3. Vacuum desecrator  
  4. None of above 

150. Purple color of free iodine which among the following: 

  1. Ether 
  2. H2o 
  3. Sublimation 
  4. None of above