MDCAT MCQs for Entry Test with Answers Page 4 | Mcat Chemistry mcqs chapter wise pdf with answers

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151. The simplest whole number ratio of atoms in the compound is called which among the following: 

  1. Structural formula 
  2. Empirical Formula  
  3. Molecular Formula 
  4. None of above 

152. A chemical formula based on actual number of molecule is called formula which among the following: 

  1. Structural 
  1. Molecular
  2. Both
  3. none 

153. On the Fahrenheit scale, the freezing point of water is which among the following: 

  1. 30F 
  2. 31F 
  3. 32F  
  4. None of above 

154. Very small and very large quantities are expressed in term of which among the following: 

  1. Logarithm 
  2. Significant figures  
  3. Exponents  
  4. None of above 

155. Which of the following is a single pure compound which among the following: 

  1. Air 
  2. Steam  
  3. Brass 
  4. Sea Water 

156. Which one of the following is not a compound which among the following: 

  1. Air  
  2. Lime 
  3. Sodium Carbonate 
  4. Water 

157. Formula of Ferric sulphate is which among the following: 

  1. FeSO4 
  2. Fe2(SO4)3  
  3. Fe2SO4 
  4. None of above 

158. A Mixture whose composition in uniform throughout the mixture is called which among the following: 

  1. Heterogeneous 
  2. Homogenous  
  3. Photonuclear 
  4. None of above 

159. The Number of Moles present in 6gms of carbon is which among the following: 

  1. 2 
  2. 0.5  
  3. 5 
  4. 1 

160. Freezing point of water which among the following: 

  1. 32F 
  2. 273K 
  3. 0C 
  4. All of These  

161. The change of concentrations of reactants and products with time is called which among the following: 

  1. Rate of reaction  
  2. Rate of equilibrium 
  3. Backward rate 
  4. Forward rate 

162. The reaction which do not proceed to completion and after passage of some time contain both reactants and products, are called which among the following: 

  1. Reversible reaction  
  2. Incomplete reaction 
  3. Complete reaction 
  4. Non-reversible reaction 

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

  1. Reversible reaction 
  2. Equilibrium  
  3. Complete reaction 
  4. None of above 

164. As long as temperature remains constant and concentration of water vapours do not change in a closed system it indicates a which among the following: 

  1. Reversible process 
  2. Dynamic equilibrium  
  3. Reversible equilibrium 
  4. None of above 

165. The stage at which the reaction appears to stop under given conditions is called which among the following: 

  1. Equilibrium stage  
  2. Final stage 
  3. Completion stage 
  4. Initial stage 

166. Under the given set of conditions of temperature, pressure and concentration the point at which a reaction seems to stop is always which among the following: 

  1. Different 
  2. Changes 
  3. Readable 
  4. Same  

167. Under a given set of conditions at which any reaction seems to stop has a quantitative relation with reactant and product which among the following: A. Nature 

  1. Type 
  2. Concentration  
  3. None of above 

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

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

169. Which state of chemical equilibrium is that tat which all types of motions which among the following: 

  1. Are available 
  2. Do not cease  
  3. Not available 
  4. None of Them 

171. Deflecting of cathode rays towards positively charged plats indicate it is

  1. Neutral  
  2. Negatively charged  
  3. Electromagnetic wave 
  4. Positively charged 

171. The first member of alkene series is which among the following: 

  1. Methane 
  2. Ethane 
  3. Ethene  
  4. Ethyne 

172. Isomerism in which the compounds possess the same molecular formula but different arrangement of carbon atoms in the hydrocarbon chain is called which among the following: 

  1. Functional isomerism 
  2. Position isomerism 
  3. Chain isomerism  
  4. None of above 

173. Iso-butane possesses which among the following: 

  1. Position isomerism 
  2. Functional isomerism 
  3. Mesmerism 
  4. Chain isomerism  

174. A process that breaks large molecules into smaller one is called which among the following: 

  1. Refining 
  2. Reforming 
  3. Cracking  
  4. None of above 

175. Compounds which contain only carbon and hydrogen elements are called which among the following: 

  1. Carbohydrates 
  2. Hydrocarbons  
  3. Halides 
  4. None of above 

176. The hydrocarbons which contain one more double or triple bonds are called which among the following: 

  1. Saturated hydrocarbons 
  2. Unsaturated hydrocarbons  
  3. Paraffin 
  4. Halogens 

177. The hydrocarbons in which carbon atoms are arranged in rings are called which among the following: 

  1. Aliphatic 
  2. Aromatic 
  3. Ali cyclic  
  4. None of above 

178. The quality of petrol is measured by which among the following: 

  1. Cracking 
  2. Reforming 
  3. Octane number  
  4. Decane number 

179. The first member of Alkyne series is which among the following: 

  1. Methane 
  2. Ethane 
  3. Ethane 
  4. Acetylene  

180. The number of isomers in butane is which among the following: 

  1. 1 
  2. 2  
  3. 3 
  4. 4 

181. At equilibrium the rate of disappearing of reactants and the rate of formation of products are which among the following: 

  1. Equal  
  2. Different 
  3. Very different 
  4. Almost equal 

182. The change of concentrations of reactants and products with time is called which among the following: 

  1. Rate of equilibrium 
  2. Forward rate 
  3. Rate of reaction  
  4. Backward rate 

183. When at equilibrium there is no motion what so ever, it is called which among the following: 

  1. Dynamic 
  2. Permanent 
  3. Dead 
  4. Static  

184. All types of chemical equilibra and equilibra between physical states are called which among the following:

  1. Static 
  2. Dynamic  
  3. Permanent 
  4. Temporary 

185. At equilibrium, as long as the volume of the container and the temperature of the chemical system remains unchanged, the concentrations of reactants and products which among the following: 

  1. Changes 
  2. Keep on changing 
  3. Do not change  
  4. Is fixed 

186. At the beginning the concentrations of reactants and products change which among the following: 

  1. Sharply 
  2. Rapidly  
  3. Slowly 
  4. Smoothly 

187. The concentrations of the active masses of the reacting species and the rate of reaction are which among the following: 

  1. Related  
  2. Interdependent 
  3. Independent 
  4. Not related 

188. Law of mass action was put forward by which among the following: 

  1. Waage 
  2. Einstin 
  3. Guldberg  
  4. Goldberg and wage 

189. The rate at which a chemical reaction proceeds and the product of the active masses of the reacting substances are which among the following: 

  1. Directly related  
  2. Indirectly related 
  3. Related 
  4. Not related 

190. A homogeneous mixture of two or more than two substance whose proportions can be varied within certain limits is called which among the following: 

  1. Solution  
  2. Mixture 
  3. Element 
  4. Compound    

191. The active masses of the reacting species are related to rate of reaction which among the following: 

  1. Directly  
  2. Log-normally 
  3. Linearly 
  4. Indirectly 

192. A bond formed between alkali metals and members of helogen family will be which among the following: 

  1. Metallic 
  2. Covalent 
  3. Ionic  
  4. Coordinate 

193. The amount of energy required to remove one electron from sodium isolated gaseous atom is which among the following: 

  1. 296 KJ/mol 
  2. 496 KJ/mol  
  3. 596 KJ/mol 
  4. 696 KJ/mol 

194. The amount of energy released when one electron is gained by isolated gaseous atom of chlorine is which among the following: 

  1. 249 KJ/mol 
  2. 349 KJ/mol  
  3. 449 KJ/mol 
  4. 549 KJ/mol 

195. When heat is absorbed or evolved in a chemical reaction with molar quantities of reactants and products, it is called which among the following: 

  1. Heat of reaction  
  2. Heat of reactant 
  3. Heat of product 
  4. Heat change 

196. A negative sign is given if heat is which among the following: 

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

197. A positive sign is given if in a chemical reaction heat is which among the following: 

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

198. A substance under going a physical or chemical change is a which among the following: 

  1. Body 
  2. Process 
  3. Unit 
  4. System  

199. When elements of low ionization energy combine with elements of high electron affinity, the of bond formed is which among the following: 

  1. Covalent 
  2. Coordinate 
  3. Metallic 
  4. Ionic  

200. The concentrations of reactants and product at equilibrium changes which among the following: 

  1. Rapidly 
  2. Sharply 
  3. Drastically 
  4. Very slowly  

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