MCQOPTIONS
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MCQOPTIONS
This section includes 259 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
High dipole moment of water (1.03 D) justifies that |
| A. | It is not a linear molecule |
| B. | It has higher density than ice |
| C. | It is neutral towards litmus |
| D. | It is a universal solvent |
| Answer» B. It has higher density than ice | |
| 102. |
Which one of the following elements is metalloid ? |
| A. | Si |
| B. | Pb |
| C. | Ge |
| D. | C |
| Answer» D. C | |
| 103. |
How many neutrons are there in protium ? |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» B. 1 | |
| 104. |
Hydrogen forms |
| A. | Covalent hydrides |
| B. | Ionic hydrides |
| C. | Metalic hydrides |
| D. | All of these |
| Answer» E. | |
| 105. |
How many protons are there in deuterium ? |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 106. |
Water is a/an |
| A. | Acidic oxide |
| B. | Basic oxide |
| C. | Amphoteric oxide |
| D. | Neutral oxide |
| Answer» E. | |
| 107. |
Which is the process used for purification of bauxite are containing silica as impurity ? |
| A. | Baeyer's process |
| B. | Hall's process |
| C. | Hoope's process |
| D. | Serpeck's process |
| Answer» E. | |
| 108. |
Duralumin alloy consists of |
| A. | Al and Mg |
| B. | Al and Ni |
| C. | Al, Mg and Ni |
| D. | Al, Mg, Mn and Cu |
| Answer» C. Al, Mg and Ni | |
| 109. |
Anhydrous aluminium chlorides gives fumes in moist air because it is |
| A. | Hygroscopic |
| B. | Deliquescent |
| C. | Efforescent |
| D. | Readily ydrolysed |
| Answer» E. | |
| 110. |
Most impure form of carbon is |
| A. | Garphite |
| B. | Anthracite |
| C. | Lamp black |
| D. | Wood charcoal |
| Answer» E. | |
| 111. |
The oxidation number of carbon in CH |
| A. | Zero |
| B. | -2 |
| C. | +2 |
| D. | -4 |
| Answer» B. -2 | |
| 112. |
The principal constituent of pyrex galss |
| A. | Zn |
| B. | Pb |
| C. | Cd |
| D. | B |
| Answer» E. | |
| 113. |
Which is pseudo solid ? |
| A. | Glass |
| B. | Diamond |
| C. | Sodium chloride |
| D. | Calcium carbonali |
| Answer» B. Diamond | |
| 114. |
Water softening by Clarke's process uses |
| A. | Potash alum |
| B. | Calcium bicarbonate |
| C. | Calcium hydroxide |
| D. | Sodium bicarbonate |
| Answer» D. Sodium bicarbonate | |
| 115. |
Ordinary glass is ? |
| A. | Sodium silicate |
| B. | Calcium silicate |
| C. | Calcium and sodium silicate |
| D. | Copper silicate |
| Answer» D. Copper silicate | |
| 116. |
Sodium thiosuphate is used in photography because of it |
| A. | Reducing behaviour |
| B. | Oxidising behaviour |
| C. | Complex forming behaviour |
| D. | Reaction with light |
| Answer» D. Reaction with light | |
| 117. |
Which of the following has the highest bond energy ? |
| A. | Lodine |
| B. | Chlorine |
| C. | Fluorine |
| D. | Bromine |
| Answer» C. Fluorine | |
| 118. |
Among the halogens, the one which is oxidized by nitric acid is ? |
| A. | Chlorine |
| B. | Iodine |
| C. | Fluorine |
| D. | Bromine |
| Answer» C. Fluorine | |
| 119. |
Which of the following is not true about urea ? |
| A. | It should be applied at sowing time |
| B. | It can not be used for all types of crops and soils |
| C. | The cost of production of urea is low |
| D. | It can be stored easily |
| Answer» C. The cost of production of urea is low | |
| 120. |
Which of the following is used for making bullet-proof vests ? |
| A. | Boric acid |
| B. | Borax |
| C. | Boron carbide |
| D. | None of these |
| Answer» D. None of these | |
| 121. |
Which of the following is an alloy of aluminium ? |
| A. | Magnallium |
| B. | Duralumin |
| C. | Brass |
| D. | Both (a) and (b) |
| Answer» E. | |
| 122. |
Which one of the following is a mixed fertilizers ? |
| A. | Urea |
| B. | CAN |
| C. | Ammonium sulphate |
| D. | NPK |
| Answer» E. | |
| 123. |
Which of the following halogens has the greatest electron affinity ? |
| A. | Iodine |
| B. | Bromine |
| C. | Chlorine |
| D. | Fluorine |
| Answer» D. Fluorine | |
| 124. |
Which one of the following formed from sea water ? |
| A. | Halogen |
| B. | Chlorine |
| C. | Oxygen |
| D. | Sulphur |
| Answer» B. Chlorine | |
| 125. |
Brimstone is another name of |
| A. | Lapis lazuli |
| B. | Phosphorus |
| C. | Sulphur |
| D. | Sodium |
| Answer» D. Sodium | |
| 126. |
Concentrated sulphuric acid is always diluted by adding |
| A. | Acid to water |
| B. | Phenol to acid |
| C. | Water to acid |
| D. | Alcohol to acid |
| Answer» B. Phenol to acid | |
| 127. |
Which one of the following is responsible for blue baby syndrome ? |
| A. | Fluoride |
| B. | Nitrate |
| C. | Arsenic |
| D. | Lead |
| Answer» C. Arsenic | |
| 128. |
Which of the following is used for the treatment of skin disease ? |
| A. | P |
| B. | N |
| C. | S |
| D. | O |
| Answer» D. O | |
| 129. |
Which of the following produces hydrolith with dihydrogen ? |
| A. | Al |
| B. | Ca |
| C. | Mg |
| D. | Ca |
| Answer» E. | |
| 130. |
The isotope of hydrogen which is radioactive is |
| A. | Tritium |
| B. | Para hydrogen |
| C. | Nascent hydrogen |
| D. | Deutrium |
| Answer» B. Para hydrogen | |
| 131. |
Which of the following shows greatest inert pair effect ? |
| A. | Chlorine |
| B. | Bromine |
| C. | Iodine |
| D. | Fluorine |
| Answer» D. Fluorine | |
| 132. |
Elements showing maximum inert pair effect is |
| A. | Al |
| B. | Sn |
| C. | Pb |
| D. | Cu |
| Answer» D. Cu | |
| 133. |
Which of the following show electrical conductance ? |
| A. | Sodium |
| B. | Potassium |
| C. | Graphite |
| D. | Diamond |
| Answer» D. Diamond | |
| 134. |
The noble gas used for treatment of cancer is |
| A. | Helium |
| B. | Radon |
| C. | Krypton |
| D. | Argon |
| Answer» C. Krypton | |
| 135. |
Ozone is an..........of, oxygen. |
| A. | Isomer |
| B. | Isotope |
| C. | Allotrope |
| D. | Isomorphism |
| Answer» D. Isomorphism | |
| 136. |
Which one of the following is widely distributed in air ? |
| A. | He |
| B. | Ne |
| C. | Ar |
| D. | Kr |
| Answer» D. Kr | |
| 137. |
Hypo is used |
| A. | in developing photographic |
| B. | for making printing ink |
| C. | for making perfumes |
| D. | as a bleaching agent |
| Answer» B. for making printing ink | |
| 138. |
Which halogen form maximum compounds with xenon ? |
| A. | F |
| B. | CI |
| C. | Br |
| D. | I |
| Answer» B. CI | |
| 139. |
Use of diamond as a gem depends upon its |
| A. | High cost |
| B. | Refraction index |
| C. | Extreme contains |
| D. | Bad conductance |
| Answer» C. Extreme contains | |
| 140. |
The colour of hydrogen is |
| A. | Yellow |
| B. | Orange |
| C. | Black |
| D. | Colourless |
| Answer» E. | |
| 141. |
Aluminium reacts with with caustic soda to form |
| A. | Sodium meta aluminate |
| B. | Aluminium hydroxide |
| C. | Aluminium oxide |
| D. | Sodium tetra aluminate |
| Answer» B. Aluminium hydroxide | |
| 142. |
The molarity of pure water at 4 |
| A. | 2.5 M |
| B. | 5 M |
| C. | 1 M |
| D. | 55.5 M |
| Answer» E. | |
| 143. |
Which one is the weakest acid ? |
| A. | HF |
| B. | HCI |
| C. | HBr |
| D. | HI |
| Answer» B. HCI | |
| 144. |
The structure of boric acid is |
| A. | Planer |
| B. | Tertrahedral |
| C. | Trigonal planer |
| D. | Hexagonal |
| Answer» D. Hexagonal | |
| 145. |
Bromine gas turns starch iodine paper |
| A. | Blue |
| B. | Red |
| C. | Colourless |
| D. | Yellow |
| Answer» B. Red | |
| 146. |
An equeous solution of Borax is |
| A. | Corrosive |
| B. | Neutral |
| C. | Acidic |
| D. | Alkalene |
| Answer» E. | |
| 147. |
Why are noble gases called so ? |
| A. | They react quickly with other compound |
| B. | Due to their chemical inertness |
| C. | They react only with carbon compound |
| D. | They can produce oxygen |
| Answer» C. They react only with carbon compound | |
| 148. |
Alim is |
| A. | A complex salt |
| B. | A double salt |
| C. | A normal salt |
| D. | A mixed salt |
| Answer» C. A normal salt | |
| 149. |
The following compound reacts with conc. H |
| A. | Formic acid |
| B. | sugar |
| C. | Oxalic acid |
| D. | Ethanol |
| Answer» D. Ethanol | |
| 150. |
An important method for the fixation of nitrogen is |
| A. | Haber's process |
| B. | Solvay's process |
| C. | Deacon's process |
| D. | Frusch's process |
| Answer» B. Solvay's process | |