MCQOPTIONS
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MCQOPTIONS
This section includes 204 Mcqs, each offering curated multiple-choice questions to sharpen your UPSEE knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
Upon reacting with alkalis, insoluble oxides of non-metals of Period 3 form |
| A. | Insoluble salts |
| B. | soluble salts |
| C. | H₂(g) |
| D. | aqueous solutions |
| Answer» C. H₂(g) | |
| 152. |
Upon oxidation of acidified potassium manganate (VII), purple color of Manganese |
| A. | stays |
| B. | changes to pink |
| C. | becomes colorless |
| D. | becomes blue |
| Answer» D. becomes blue | |
| 153. |
Oxidizing agents |
| A. | are mostly non-metals |
| B. | are mostly metals |
| C. | decrease in oxidation state |
| D. | are mostly transition metals |
| Answer» B. are mostly metals | |
| 154. |
Another product of the reaction SiO₂(s) + NaOH(l) → Na₂SiO₃(aq) would be |
| A. | HO₃⁺ |
| B. | OH⁻ |
| C. | H₂O(l) |
| D. | H₂(g) |
| Answer» D. H₂(g) | |
| 155. |
The ions containing sulfur and oxygen are called |
| A. | sulphide |
| B. | sulfates |
| C. | sulphur dioxide |
| D. | sulfuric acid |
| Answer» C. sulphur dioxide | |
| 156. |
If Potassium Iodide (KI) acts as oxidizing agent, change occurs from, indicates presence of |
| A. | colorless to brown |
| B. | colorless to blue |
| C. | brown to colorless |
| D. | blue to colorless |
| Answer» B. colorless to blue | |
| 157. |
Metals always bear |
| A. | positive oxidation number |
| B. | negative oxidation number |
| C. | positive reduction number |
| D. | negative reduction number |
| Answer» B. negative oxidation number | |
| 158. |
In the process of oxidation, 20% of iron and steel is destroyed because of |
| A. | rusting |
| B. | molting |
| C. | global warming |
| D. | none of above |
| Answer» B. molting | |
| 159. |
An acidic oxide reacts well with |
| A. | water |
| B. | acids |
| C. | bases |
| D. | neutral compound |
| Answer» D. neutral compound | |
| 160. |
Period 3 metal that has the highest electronegativity is |
| A. | Si |
| B. | Cl |
| C. | P |
| D. | S |
| Answer» C. P | |
| 161. |
The oxidation number of any isolated element is |
| A. | unit |
| B. | zero |
| C. | infinite |
| D. | |
| Answer» C. infinite | |
| 162. |
Element that has oxidation number greater than +4 is |
| A. | Cl |
| B. | Na |
| C. | Mg |
| D. | Si |
| Answer» B. Na | |
| 163. |
Silver and copper (II) nitrate is yielded upon the reaction of copper with |
| A. | silver |
| B. | silver nitrate |
| C. | silver oxide |
| D. | none of above |
| Answer» C. silver oxide | |
| 164. |
Silicon dioxide reacts with an acid to form |
| A. | water only |
| B. | salt only |
| C. | oxygen |
| D. | water and salt |
| Answer» E. | |
| 165. |
SiO₂ is formed after the reaction of SiCl₄(l) + 2H₂O(l). What is the state of SiO₂? |
| A. | solid |
| B. | Liquid |
| C. | Aqueous |
| D. | Gaseous |
| Answer» B. Liquid | |
| 166. |
Phenol reacts vigorously with sodium metal giving off |
| A. | hydrogen gas only |
| B. | sodium phenoxide only |
| C. | nitrogen gas |
| D. | hydrogen gas and sodium phenoxide |
| Answer» E. | |
| 167. |
While passing hydrogen over heated CuO(s), black color is oxidized to |
| A. | golden color |
| B. | pink color |
| C. | blue color |
| D. | colorless |
| Answer» C. blue color | |
| 168. |
In plentiful supply of oxygen or air, burning of carbon gives off |
| A. | carbon monoxide |
| B. | carbon dioxide |
| C. | H₃O |
| D. | H₂CO₃ |
| Answer» C. H₃O | |
| 169. |
Phenol dissolves well in |
| A. | alkalis |
| B. | acids |
| C. | bases |
| D. | water |
| Answer» B. acids | |
| 170. |
Alkaline iodine solution is used to test |
| A. | methyl ketone |
| B. | ethanol |
| C. | secondary alcohols |
| D. | all of above |
| Answer» E. | |
| 171. |
Aluminum oxide acts as a base when it reacts with |
| A. | water |
| B. | alkali |
| C. | acid |
| D. | base |
| Answer» D. base | |
| 172. |
N₂O, NO, NO₂ are all nitrogen's |
| A. | oxates |
| B. | oxides |
| C. | ions |
| D. | isomers |
| Answer» C. ions | |
| 173. |
Consider the reaction: Al₂O₃ + NaOH + H₂O(l) → NaAl(OH)₄(aq). Moles of NaAl(OH)₄(aq) produced with 1 mole of Al₂O₃ will be |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 174. |
In Phosphoric acid H₃PO₄, the oxidation state of Phosphorus is |
| A. | +1 |
| B. | +3 |
| C. | +5 |
| D. | +7 |
| Answer» D. +7 | |
| 175. |
Potassium oxide is a/an |
| A. | acidic oxide |
| B. | basic oxide |
| C. | amphoteric oxide |
| D. | neutral oxide |
| Answer» C. amphoteric oxide | |
| 176. |
The system which suggested Roman numbers to name compounds is called as |
| A. | Periodic table |
| B. | Stock Nomenclature |
| C. | Roman Nomenclature |
| D. | Nomenclature |
| Answer» C. Roman Nomenclature | |
| 177. |
Reduction is the decrease in |
| A. | oxidation number |
| B. | charge |
| C. | solubility |
| D. | none of above |
| Answer» B. charge | |
| 178. |
Upon oxidation, barium (Ba) compounds give |
| A. | brick red color |
| B. | scarlet color |
| C. | violet color |
| D. | apple green color |
| Answer» E. | |
| 179. |
Group II metals burn with characteristic colors because |
| A. | they are highly colored |
| B. | they are reduced when they react |
| C. | they are oxidized when they react |
| D. | they are highly densed |
| Answer» D. they are highly densed | |
| 180. |
Elements get more electronegative going across |
| A. | periods |
| B. | groups |
| C. | rows |
| D. | columns |
| Answer» B. groups | |
| 181. |
Element that uses all outer shell electrons in bonding with oxygen (O₂) is |
| A. | S only |
| B. | Na only |
| C. | N |
| D. | S and Na |
| Answer» E. | |
| 182. |
Hydrated Aluminum Chloride (AlCl₃) exists as |
| A. | Al₂Cl₃ |
| B. | AlCl₃ |
| C. | Al₂Cl₆ |
| D. | AlCl₆ |
| Answer» C. Al₂Cl₆ | |
| 183. |
Consider the reaction: SiCl₄(l) + 2H₂O(l) → SiO₂(s) + HCl. The form of HCl produced in this reaction is |
| A. | Liquid |
| B. | solid |
| C. | gas |
| D. | none of above |
| Answer» D. none of above | |
| 184. |
Any specie can be reduced if the oxidation state is |
| A. | oxidized |
| B. | gained |
| C. | reduced |
| D. | lost |
| Answer» D. lost | |
| 185. |
CH₃CHO is an |
| A. | aldehydes |
| B. | ketone |
| C. | ether |
| D. | ester |
| Answer» B. ketone | |
| 186. |
The oxidation number of Phosphorus (P) in Phosphorus Chloride (PCl₃) is |
| A. | +1 |
| B. | +2 |
| C. | +3 |
| D. | +4 |
| Answer» D. +4 | |
| 187. |
In period 3, metal that has the highest electronegativity is |
| A. | Cl |
| B. | Na |
| C. | Al |
| D. | S |
| Answer» B. Na | |
| 188. |
Iodoform can be used as |
| A. | antiseptic only |
| B. | healing wounds only |
| C. | antibiotic drug |
| D. | antiseptic and healing wounds |
| Answer» E. | |
| 189. |
While Iodide ion (I-) oxidizes to Iodine (I2), a change in color from colorless to |
| A. | brown occurs |
| B. | pink occurs |
| C. | blue occurs |
| D. | violet occurs |
| Answer» B. pink occurs | |
| 190. |
In a reaction between CuSO₄(s) and Zn(s), |
| A. | Zinc experiences an increase in the oxidation state |
| B. | undergoes oxidation |
| C. | Zinc undergoes oxidation |
| D. | all of these |
| Answer» E. | |
| 191. |
Old paintings became discolourised due to |
| A. | Lead Sulphide PbS |
| B. | Lead Sulphate PbSO₄ |
| C. | Lead Chloride PbCl₂ |
| D. | Lead Oxide PbO |
| Answer» B. Lead Sulphate PbSO₄ | |
| 192. |
If acidified Potassium Dichromate(VI) (K₂Cr₂O₇) acts as oxidizing agent, color changes from |
| A. | orange to red |
| B. | orange to green |
| C. | yellow to green |
| D. | yellow to red |
| Answer» D. yellow to red | |
| 193. |
In an acidified solution of Potassium Dichromate(VI) (K₂Cr₂O₇), Dichromate ion (Cr₂O₇-2) becomes reduced to |
| A. | Chromate (V) ions |
| B. | Chromium (III) ions |
| C. | Chromium (II) ions |
| D. | Chromium (VI) ions |
| Answer» C. Chromium (II) ions | |
| 194. |
Oxidation involves |
| A. | loss of hydrogen |
| B. | loss of oxygen |
| C. | gain in hydrogen |
| D. | gain in electrons |
| Answer» B. loss of oxygen | |
| 195. |
Upon adding sugar in hot drink, slow dissolution is of |
| A. | sugar cubes dissolve slowly |
| B. | granulated sugar cubes dissolve slowly |
| C. | brown sugar doesn?t dissolve easily |
| D. | all of the above |
| Answer» B. granulated sugar cubes dissolve slowly | |
| 196. |
While Potassium Iodide (KI) is a powerful reducing agent, |
| A. | the iodide ion is oxidized to iodine |
| B. | the iodide ion is reduced to iodine |
| C. | iodine is reduced to iodide ion |
| D. | iodine is oxidized to iodide ion |
| Answer» B. the iodide ion is reduced to iodine | |
| 197. |
Activation energy can be lowered through use of |
| A. | catalysts |
| B. | inhibitors |
| C. | enzymes |
| D. | insulators |
| Answer» B. inhibitors | |
| 198. |
An oxidant |
| A. | gives oxygen |
| B. | accepts electrons |
| C. | gives hydrogen |
| D. | Both A and B |
| Answer» E. | |
| 199. |
Oxidizing agents does not include |
| A. | potassium iodide |
| B. | potassium manganate |
| C. | potassium dichromate |
| D. | bromine solutions |
| Answer» B. potassium manganate | |
| 200. |
Reduction involves |
| A. | loss of oxygen |
| B. | gain in hydrogen |
| C. | gain in oxygen |
| D. | loss of electrons |
| Answer» B. gain in hydrogen | |