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.
| 1051. |
Which compound form benzoic acid on oxidation with acidified KMnO4 or K2Cr2O7 ? |
| A. | Toluene |
| B. | Ethyl benzene |
| C. | n-propyl benzene |
| D. | All |
| Answer» E. | |
| 1052. |
By which method the molecular mass of benzene was determined as 78.108 ? |
| A. | Specific gravity method |
| B. | Vapour density method |
| C. | X-ray diffraction method |
| D. | Distillation methos |
| Answer» C. X-ray diffraction method | |
| 1053. |
What is the molecular formula of Benzenetriozonide ? |
| A. | C6H6O9 |
| B. | C6H5O8 |
| C. | C6H5O9 |
| D. | C6H6O6 |
| Answer» B. C6H5O8 | |
| 1054. |
Which is fused cyclic aromatic compound _____________________? |
| A. | diphenyl amine |
| B. | diphenyl methane |
| C. | naphthalene |
| D. | biphenyl |
| Answer» D. biphenyl | |
| 1055. |
Chlorination of toluene in the presence of sublight produces_________________? |
| A. | Benzyl chloride |
| B. | o – chlorotoluene |
| C. | p – chlorotoluene |
| D. | benzoic acid |
| Answer» B. o – chlorotoluene | |
| 1056. |
Benzene does not undergo___________________? |
| A. | Substitution reaction |
| B. | Addition reaction |
| C. | Polymerization reactions |
| D. | Oxidation reactions |
| Answer» D. Oxidation reactions | |
| 1057. |
Acetophenone is a_____________________? |
| A. | Ether |
| B. | Ketone |
| C. | Aldehyde |
| D. | Ester |
| Answer» C. Aldehyde | |
| 1058. |
Phosphorus is a Greek word and it means_________________? |
| A. | Light bearing |
| B. | Fire |
| C. | Impure |
| D. | Tetrahedral |
| Answer» B. Fire | |
| 1059. |
Special features of borate glass is that it is_________________? |
| A. | Heat resistant |
| B. | Low melting |
| C. | Used to prepare chemical garden |
| D. | Green in colour |
| Answer» B. Low melting | |
| 1060. |
Which electronic configuration corresponds to an element of group IIIA ? |
| A. | 1s2 2s2 2p3 |
| B. | 1s2 2s2 2p6 3s2 3p1 |
| C. | 1s2 2s2 2p4 |
| D. | 1s2 2s2 2p6 3s2 3p6 4s2 3d1 |
| Answer» C. 1s2 2s2 2p4 | |
| 1061. |
Boron in soil has been considered micronutrient for_________________? |
| A. | Soil porocity |
| B. | Proper growth of plants |
| C. | Alkalinity of soil |
| D. | All |
| Answer» C. Alkalinity of soil | |
| 1062. |
Which of the following is metasilicic acid ? |
| A. | H2SnO3 |
| B. | H2SiO3 |
| C. | H3AsO4 |
| D. | H3SbO4 |
| Answer» C. H3AsO4 | |
| 1063. |
The coloured glassy mass in borax bead test is due to the formation of___________________? |
| A. | metal borate |
| B. | metal meta borate |
| C. | metal boride |
| D. | metal silicate |
| Answer» C. metal boride | |
| 1064. |
Boron is non metal while other elements of IIIA group are metals. This is because______________? |
| A. | it has small size |
| B. | it has high nuclear charge |
| C. | it forms molecular addition compounds |
| D. | all of the above |
| Answer» E. | |
| 1065. |
If temperature of gallium arsenide is increased then its conductivity will___________________? |
| A. | decrease |
| B. | increase |
| C. | remains constant |
| D. | first decreases then increases |
| Answer» C. remains constant | |
| 1066. |
Which of the following will decompose to produce litharge_________________? |
| A. | Pb2O |
| B. | Pb3O4 |
| C. | PbO2 |
| D. | All of the above |
| Answer» C. PbO2 | |
| 1067. |
Aqueous solution of borax above 62°C gives crystals of________________? |
| A. | Na2B4O7.4H2O |
| B. | Na2B4O7.5H2O |
| C. | Na2B4O7.2H2O |
| D. | Na2B4O7.10H2O |
| Answer» C. Na2B4O7.2H2O | |
| 1068. |
Allotropic form of phosphorus that is poisonous is___________________? |
| A. | White |
| B. | Red |
| C. | Black |
| D. | Violet |
| Answer» B. Red | |
| 1069. |
The process of aluminium extraction is called__________________? |
| A. | Hall process |
| B. | Thermite process |
| C. | Haber process |
| D. | Contact process |
| Answer» B. Thermite process | |
| 1070. |
CO2 is gas while SiO2 is solid at room temperature? |
| A. | carbon is non-metal while silicon is semi-metal |
| B. | CO2 is an independent molecule while SiO2 has network covalent structure |
| C. | CO2 forms multiple bond while silicon does not form multiple bonds |
| D. | Silicon has all sigma bonds |
| Answer» C. CO2 forms multiple bond while silicon does not form multiple bonds | |
| 1071. |
Which of the following is not a use of silicon ? |
| A. | Lubricants |
| B. | Hydraulic brakes |
| C. | Antifreeze |
| D. | Water repellent |
| Answer» D. Water repellent | |
| 1072. |
Chlorine Cl when attached to benzene has________? |
| A. | +I and +R effect |
| B. | -1 and +R effect |
| C. | +1 and -R effect |
| D. | -I and -R effect |
| Answer» C. +1 and -R effect | |
| 1073. |
SO3 is not absorbed in water directly because__________________? |
| A. | Reaction is exothermic |
| B. | It is insoluble in water |
| C. | Dilute acid is produced |
| D. | All of above |
| Answer» B. It is insoluble in water | |
| 1074. |
Acetic anhydride can be obtained by treating ethyl alcohol with___________________? |
| A. | P2O5 |
| B. | H2SO4 |
| C. | Both A and B |
| D. | PCI5 |
| Answer» D. PCI5 | |
| 1075. |
Oxygen and sulphur resemble in all except________________? |
| A. | Electronic conviguration of valence shell electrons |
| B. | Show allotropy |
| C. | Polymeric |
| D. | Show same oxidation state |
| Answer» E. | |
| 1076. |
All the elements in group VIA are ___________________ in nature? |
| A. | hygroscopic |
| B. | metals |
| C. | polymeric |
| D. | all of above |
| Answer» D. all of above | |
| 1077. |
Which allotropic form of phosphorous is the most stable ? |
| A. | White |
| B. | black |
| C. | red |
| D. | Violet |
| Answer» C. red | |
| 1078. |
The chemical composition of cinnabar is__________________? |
| A. | ZnS |
| B. | PbS |
| C. | HgS |
| D. | FeS |
| Answer» D. FeS | |
| 1079. |
Which one of the followings possesses melting point below 0°C? |
| A. | Nitrogen |
| B. | Phosphorus |
| C. | Carbon |
| D. | Bismuth |
| Answer» B. Phosphorus | |
| 1080. |
Arsenic oxides are removed by passing through_________________? |
| A. | Ferric hydroxide |
| B. | Sodium hydroxide |
| C. | Calcium hydroxide |
| D. | Aluminium hydroxide |
| Answer» B. Sodium hydroxide | |
| 1081. |
When sulphuric acid is treated with ethanol sulphuric acid behaves like________________? |
| A. | an acid |
| B. | a dehydrating agent |
| C. | an oxidizing agent |
| D. | as sulphonating agent |
| Answer» C. an oxidizing agent | |
| 1082. |
The element of group VIA which is a non-metal is________________? |
| A. | S |
| B. | Se |
| C. | Te |
| D. | Po |
| Answer» B. Se | |
| 1083. |
The composition of brown ring in nitrate test is_________________? |
| A. | FeSO4.No |
| B. | FeSO4.No2 |
| C. | FeSO4.No3 |
| D. | FeSO4.N2o |
| Answer» B. FeSO4.No2 | |
| 1084. |
Which one of the following compounds usually smells like garlic ? |
| A. | P2O3 |
| B. | P2O5 |
| C. | H3PO3 |
| D. | All have same smell |
| Answer» B. P2O5 | |
| 1085. |
Which of the elements show passivity when treated with conc. HNO3? |
| A. | Fe |
| B. | A |
| C. | Cr |
| D. | All of the above |
| Answer» E. | |
| 1086. |
The most powerful oxidizing agent among the halogens is__________________? |
| A. | F2 |
| B. | Cl2 |
| C. | Br2 |
| D. | I2 |
| Answer» B. Cl2 | |
| 1087. |
The gas which cannot be dried by conc. H2SO4 ? |
| A. | SO2 |
| B. | H2S |
| C. | CO2 |
| D. | C2H4 |
| Answer» C. CO2 | |
| 1088. |
The halogen which reacts spontaneously with gold (Au) to form Au+3 is ________________? |
| A. | F2 |
| B. | Cl2 |
| C. | Br2 |
| D. | I2 |
| Answer» C. Br2 | |
| 1089. |
The halogen which reacts very slowly with halogen is________________? |
| A. | Fluorine |
| B. | Chlorine |
| C. | Bromine |
| D. | Iodine |
| Answer» E. | |
| 1090. |
Which one of the following halogens is present in Teflon________________? |
| A. | I2 |
| B. | Br2 |
| C. | Cl2 |
| D. | F2 |
| Answer» E. | |
| 1091. |
Bromine can be liberated from KBr solution by the action of _______________? |
| A. | Iodine solution |
| B. | Chlorine |
| C. | NaCl |
| D. | Ki |
| Answer» C. NaCl | |
| 1092. |
Which of the following statements is incorrect about halogens ? |
| A. | All are non-metals |
| B. | All the halogens have electronic conviguration ns2p5 |
| C. | They have high electron attinity and ionization energy |
| D. | All the halogens react with noble gases to form their halides |
| Answer» E. | |
| 1093. |
Photographic plates are coated with a thin film of _________________? |
| A. | AgNO3 |
| B. | AgI |
| C. | AgCl |
| D. | AgBr |
| Answer» E. | |
| 1094. |
Indicate the correct statement__________________? |
| A. | Cl2 is the strongest oxidizing agent |
| B. | I2 is a volatile solid |
| C. | Br2 is more reactive than Cl2 |
| D. | Cl2 is insoluble in water |
| Answer» C. Br2 is more reactive than Cl2 | |
| 1095. |
Which is the paramagnetic oxide of chlorine ? |
| A. | Cl2O7 |
| B. | Cl2O6 |
| C. | ClO2 |
| D. | all |
| Answer» D. all | |
| 1096. |
Bleaching powder is an example of________________? |
| A. | Normal salt |
| B. | Double salt |
| C. | Mixed salt |
| D. | Complex |
| Answer» D. Complex | |
| 1097. |
Which of the following is the most reactive_________________? |
| A. | ethane |
| B. | ethyne |
| C. | ethene |
| D. | benzene |
| Answer» D. benzene | |
| 1098. |
Which of the following oxides of iodine is used for quantitative analysis of CO ? |
| A. | I2O4 |
| B. | I4O2 |
| C. | I2O5 |
| D. | All are equally useful |
| Answer» D. All are equally useful | |
| 1099. |
Removal of CO2 is called_____________________? |
| A. | carboxylation |
| B. | decarboxylation |
| C. | esterification |
| D. | hydroxylation |
| Answer» C. esterification | |
| 1100. |
Which of the halogen has highest electronegativity ? |
| A. | Fluorine |
| B. | Chlorine |
| C. | Bromine |
| D. | Iodine |
| Answer» B. Chlorine | |