MCQOPTIONS
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MCQOPTIONS
This section includes 1262 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1101. |
Fluorine can react with_________________? |
| A. | Xe |
| B. | Kr |
| C. | Rn |
| D. | All of the above |
| Answer» E. | |
| 1102. |
Hydrogenolysis results in the formation of________________? |
| A. | alkane |
| B. | alkene |
| C. | alkyne |
| D. | aldehydes |
| Answer» B. alkene | |
| 1103. |
Which is methyl cyanide_________________? |
| A. | CH3NH2 |
| B. | CH3NO2 |
| C. | CH3CN |
| D. | CH2 = CH – CN |
| Answer» D. CH2 = CH – CN | |
| 1104. |
Molozonide is unstable and changes into ozonide on_________________? |
| A. | reduction |
| B. | oxidation |
| C. | hydrolysis |
| D. | rearrangement |
| Answer» E. | |
| 1105. |
Which one is Chloroform_________________? |
| A. | CH2Cl2 |
| B. | CH3Cl |
| C. | CHCl3 |
| D. | CCl4 |
| Answer» D. CCl4 | |
| 1106. |
R-Mg-Br is called___________________? |
| A. | Grignard reagent |
| B. | Metallic alkyl halide |
| C. | Both A & B |
| D. | Alkyl |
| Answer» D. Alkyl | |
| 1107. |
Which is used for artificial ripening of fruit ? |
| A. | ethane |
| B. | ethene |
| C. | ethyne |
| D. | methane |
| Answer» C. ethyne | |
| 1108. |
Treating phenol with formaldehyde in the presence of dilute base forms Bakelite. The process involved is_________________? |
| A. | oxidation |
| B. | elimination |
| C. | condensation polymerization |
| D. | additional polymertization |
| Answer» D. additional polymertization | |
| 1109. |
Ethyl chloride with nascent hydrogen produces_________________? |
| A. | methane |
| B. | ethane |
| C. | propane |
| D. | butane |
| Answer» C. propane | |
| 1110. |
Preparation of vegetable ghee involves_________________? |
| A. | halogenation |
| B. | hydroxylation |
| C. | hydrogenation |
| D. | hydration |
| Answer» D. hydration | |
| 1111. |
Grignard reagent is reactive due to___________________? |
| A. | the presence of halogen atom |
| B. | the presence of magnesium atom |
| C. | the polarity of C-Mg bond |
| D. | all |
| Answer» D. all | |
| 1112. |
When one hydrogen atom of alkane is removed then it is called________________? |
| A. | alkene |
| B. | alkyl |
| C. | aldehyde |
| D. | saturated hydrocarbon |
| Answer» C. aldehyde | |
| 1113. |
General formula of alkyne is______________? |
| A. | CnH2n + 2 |
| B. | CnH2n – 2 |
| C. | CnH2n |
| D. | CnH2n + 2 |
| Answer» C. CnH2n | |
| 1114. |
Reactivity due to pi-electrons is present in_________________? |
| A. | alkane |
| B. | alkene |
| C. | alkyne |
| D. | both B & C |
| Answer» E. | |
| 1115. |
Which one is not a nucleophile ? |
| A. | C2H5O- |
| B. | SCN- |
| C. | NH3 |
| D. | H3C+ |
| Answer» E. | |
| 1116. |
What will be the order of reaction of a reaction whose rate can be expressed as R = K [A] [B] ? |
| A. | Zero |
| B. | One |
| C. | Two |
| D. | Three |
| Answer» D. Three | |
| 1117. |
What is the order of kinetics in the SN1 mechanism ? |
| A. | Zero |
| B. | First |
| C. | Second |
| D. | Third |
| Answer» C. Second | |
| 1118. |
The rate of E1 reaction depends upon______________________? |
| A. | the concentration of substrate |
| B. | the concentration of nucleophile |
| C. | the concentration of substrate as well as nucleophile |
| D. | base the concentration of substrate as well as nucleophile |
| Answer» B. the concentration of nucleophile | |
| 1119. |
Elimination bimolecular reactions involve____________________________? |
| A. | first order kinetics |
| B. | second order kinetics |
| C. | third order kinetics |
| D. | zero order kinetics |
| Answer» C. third order kinetics | |
| 1120. |
Which alkyl halide out of the following may follow both SN1 and SN2 mechanism ? |
| A. | CH3-X |
| B. | (CH3)3 C-CH2 – X |
| C. | (CH3)2 CH – X |
| D. | (CH3)3 C – X |
| Answer» D. (CH3)3 C – X | |
| 1121. |
Alkyl halides are considered to be very reactive compounds towards nucleophile because_________________? |
| A. | they have an electrophilic carbon |
| B. | they have an electrophilic carbon & a good leaving group |
| C. | they have an electrophilic carbon & a bad leaving group |
| D. | they have a nucleophilic carbon & a good leaving group |
| Answer» C. they have an electrophilic carbon & a bad leaving group | |
| 1122. |
Which alkyl halide has the highest reactivity for a particular alkyl group ? |
| A. | R-F |
| B. | R-C |
| C. | R-Br |
| D. | R-I |
| Answer» E. | |
| 1123. |
Which one of the following reactants will be required to form straight chain alcohol by using Grignard reagent________________? |
| A. | formaldehyde |
| B. | ketone |
| C. | ethylene epoxide |
| D. | both A & C |
| Answer» E. | |
| 1124. |
When two moles of ethyl chloride react with two moles of sodium in the presence of ether what will be formed ? |
| A. | 2 moles of ethane |
| B. | 1 mole of ethane |
| C. | 2 moles of butane |
| D. | 1 mole of butane |
| Answer» E. | |
| 1125. |
When CO2 is made to react with ethyl magnesium iodide followed by acid hydrolysis the product formed is _________________? |
| A. | propane |
| B. | propanoic acid |
| C. | propanal |
| D. | propanol |
| Answer» C. propanal | |
| 1126. |
SN2 reaction can be best carried out with__________________? |
| A. | primary alkyl halide |
| B. | secondary alkyl halide |
| C. | tertiary alkyl halide |
| D. | all |
| Answer» B. secondary alkyl halide | |
| 1127. |
The given dissociation constant (Ka) value 1.3×10-10 is of_________________? |
| A. | Alcohol |
| B. | Acetic acid |
| C. | Water |
| D. | Phenol |
| Answer» E. | |
| 1128. |
For which mechanisms the first step involved is the same ? |
| A. | E1 + E2 |
| B. | E2 + SN2 |
| C. | E1 and SN1 |
| D. | SN1 and SN2 |
| Answer» D. SN1 and SN2 | |
| 1129. |
Alkyl halides undergo a type of reaction_________________? |
| A. | Nucleophilic substitution |
| B. | Nucleophilic addition |
| C. | Elimination |
| D. | both A & C |
| Answer» E. | |
| 1130. |
Ethylene epoxide treated with Grignards reagent followed by acid hydrolysis yield __________________? |
| A. | primary alcohol |
| B. | secondary alcohol |
| C. | tertiary alcohol |
| D. | dihydric alcohol |
| Answer» B. secondary alcohol | |
| 1131. |
Which one of the following is also known as tartaric acid ? |
| A. | 2 3-dihydroxy butance 1 4 -dioic acid |
| B. | 2 3 -dihydroxy butanedioic acid |
| C. | 2 3 -dihydroxy butanioc acid |
| D. | 2 2 -dihydroxy butanoic acid |
| Answer» B. 2 3 -dihydroxy butanedioic acid | |
| 1132. |
Water gas heated at 450?C and 200 atm pressure in the presence of ZnO+Cr2O3 will produce________________? |
| A. | methanol |
| B. | methanol |
| C. | carbonic acid |
| D. | methane |
| Answer» C. carbonic acid | |
| 1133. |
The formula of starch is__________________? |
| A. | C12H22O11 |
| B. | C6H10O5 |
| C. | (C6H10O5)n |
| D. | C6H12O6 |
| Answer» D. C6H12O6 | |
| 1134. |
The oxidation of isopropyl alcohol will yield___________________? |
| A. | propane |
| B. | Propanol |
| C. | Propanone |
| D. | Propanoic acid |
| Answer» D. Propanoic acid | |
| 1135. |
The distinction test for primary secondary and tertiary alcohol required to react each of them is_________________? |
| A. | Cone. HCI and anhydrous SOCl2 |
| B. | Cone. HCI and anhydrous CaCl2 |
| C. | Cone. HCI and anhydrous PCl2 |
| D. | Cone. HCI and anhydrous ZnCl2 |
| Answer» E. | |
| 1136. |
The rectified spirit contains________________? |
| A. | 12% alcohol |
| B. | 90% alcohol |
| C. | 95% alcohol |
| D. | 100% alcohol |
| Answer» D. 100% alcohol | |
| 1137. |
If R is the Rydberg constant for hydrogen, then wave-number of the second line in the Lyman series is _________? |
| A. | 2 R |
| B. | R/2 |
| C. | 3R/4 |
| D. | R/4 |
| Answer» D. R/4 | |
| 1138. |
Which law states that the rate of the effusion of a gas is inversely proportional to the square root of its density? |
| A. | Graham’s Law |
| B. | Gay-Lussac’s law |
| C. | Boyle’s law |
| D. | None of these |
| Answer» B. Gay-Lussac’s law | |
| 1139. |
Which of the following noble gases is not present in atmosphere? |
| A. | Argon |
| B. | Helium |
| C. | Radon |
| D. | Xenon |
| Answer» D. Xenon | |
| 1140. |
The easy way of balancing the chemical equation is_________? |
| A. | according to atom’s atomic number. |
| B. | According to atom’s atomic mass. |
| C. | First we balance Metal than non-metal than Hydrogen than Oxygen. |
| D. | None of the above |
| Answer» D. None of the above | |
| 1141. |
The valency of carbon Atom is __________ ? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 1142. |
Which law states that the volume of a given amount of gas held at constant pressure is directly proportional to the Kelvin temperature? |
| A. | Charles’ Law |
| B. | Avogadro’s Law |
| C. | Graham’s Law |
| D. | Boyle’s law |
| Answer» B. Avogadro’s Law | |
| 1143. |
What is the molecular weight of Ammonia (NH3) ________ ? |
| A. | 17.031 g/mol |
| B. | 18.031 g/mol |
| C. | 19.031 g/mol |
| D. | 27.033 g/mol |
| Answer» B. 18.031 g/mol | |
| 1144. |
Stainless steel contains___________? |
| A. | Fe+Cr+Ni |
| B. | Fe+Ni+Cu |
| C. | Fe+ Cr+Cu |
| D. | Cu+C+Ni |
| Answer» B. Fe+Ni+Cu | |
| 1145. |
Which among the following is not a property of Ionic bond _________? |
| A. | Sharing of electrons |
| B. | Transfer of electrons |
| C. | Losing of electrons |
| D. | Gain of electrons |
| Answer» B. Transfer of electrons | |
| 1146. |
What is the Chemical formula of Zinc Hydroxide _________ ? |
| A. | Zn(OH)2 |
| B. | ZNO2 |
| C. | Zn2(OH)3 |
| D. | ZnOH |
| Answer» B. ZNO2 | |
| 1147. |
The by-product of the process of Saponification is___________? |
| A. | Methanol |
| B. | Glycol |
| C. | Glycerol |
| D. | Sodium hydroxide |
| Answer» D. Sodium hydroxide | |
| 1148. |
Sum of protons and neutrons in an atom gives off _________ ? |
| A. | Nucleon number |
| B. | Mass number |
| C. | Atomic number |
| D. | Both A and B |
| Answer» E. | |
| 1149. |
The main buffer system of the human blood is____________? |
| A. | H₂CO₃ – HCO₃ |
| B. | H₂CO₃ – CO₃²⁻ |
| C. | CH₃COOH – CH₃COO⁻ |
| D. | NH₂CONH₂ – NH₂CONH⁺ |
| Answer» B. H₂CO₃ – CO₃²⁻ | |
| 1150. |
The reciprocal of the coefficent of viscosity is called__________? |
| A. | Density |
| B. | Specific gravity |
| C. | Fluidity |
| D. | Absorbance |
| Answer» D. Absorbance | |