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.
| 101. |
Activation energy can be lowered through use of |
| A. | catalysts |
| B. | inhibitors |
| C. | enzymes |
| D. | insulators |
| Answer» B. inhibitors | |
| 102. |
Oxidizing agents does not include |
| A. | potassium iodide |
| B. | potassium manganate |
| C. | potassium dichromate |
| D. | bromine solutions |
| Answer» B. potassium manganate | |
| 103. |
An oxidant |
| A. | gives oxygen |
| B. | accepts electrons |
| C. | gives hydrogen |
| D. | both a and b |
| Answer» E. | |
| 104. |
Hydrogen acts as a reducing agent, |
| A. | by taking oxygen |
| B. | by giving electrons |
| C. | by taking hydrogen |
| D. | both a and b |
| Answer» E. | |
| 105. |
Old paintings can be restored through an oxidizing agent |
| A. | H₂S |
| B. | H₂O₂ |
| C. | H₂PO₄ |
| D. | H₃O |
| Answer» C. H₂PO₄ | |
| 106. |
In Copper Oxide (CuO) and Carbon Monoxide (CO) reaction, reducing agent is |
| A. | CuO |
| B. | CO |
| C. | Cu |
| D. | CO₂ |
| Answer» C. Cu | |
| 107. |
In a Redox reaction, |
| A. | oxidation occurs |
| B. | reduction occurs |
| C. | neutralization occurs |
| D. | both a and b |
| Answer» E. | |
| 108. |
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 | |
| 109. |
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 | |
| 110. |
In Copper Oxide (CuO) and Carbon Monoxide (CO) reaction |
| A. | CO is being oxidized |
| B. | CuO is being oxidized |
| C. | CO is being reduced |
| D. | CuO is being reduced |
| Answer» B. CuO is being oxidized | |
| 111. |
Oxidation is also referred to as |
| A. | combustion |
| B. | respiration |
| C. | transpiration |
| D. | both a and b |
| Answer» E. | |
| 112. |
Exothermic reactions are |
| A. | making of chemical bond |
| B. | more common reactions |
| C. | burning of carbon |
| D. | all of these |
| Answer» E. | |
| 113. |
With purely ionic bonding, the oxides of metal sodium and magnesium produce with water the |
| A. | alkali solutions |
| B. | acidic solutions |
| C. | basic solutions |
| D. | noble gases |
| Answer» B. acidic solutions | |
| 114. |
Potassium oxide reacts and dissolve in water forming alkaline solutions, hence it is |
| A. | acidic oxide |
| B. | basic oxide |
| C. | neutral oxide |
| D. | di-oxide |
| Answer» C. neutral oxide | |
| 115. |
The oxides of sodium (Na) and magnesium (Mg) react with water (H₂O) to give off |
| A. | oxides |
| B. | dioxide |
| C. | hydroxides |
| D. | chlorides |
| Answer» D. chlorides | |
| 116. |
The naming of compounds was given by German chemist |
| A. | Alfred Stock |
| B. | John |
| C. | J.J Thomson |
| D. | George Hallington |
| Answer» B. John | |
| 117. |
Electronegativity of oxygen is equal to |
| A. | 4.04 |
| B. | 3.44 |
| C. | 4.5 |
| D. | 2.2 |
| Answer» C. 4.5 | |
| 118. |
In water, the oxides of Na and Mg produce |
| A. | H₂(g) |
| B. | OH⁻ |
| C. | H₃O |
| D. | O₂H⁻³ |
| Answer» C. H₃O | |
| 119. |
The electrical conductivity of calcium is much higher than any |
| A. | transition element |
| B. | noble gas |
| C. | alkali |
| D. | acids |
| Answer» B. noble gas | |
| 120. |
Flares of metal are used in military air crafts to confuse infrared detection systems, the metal used is |
| A. | Mg compounds |
| B. | Ca compounds |
| C. | Sr Compounds |
| D. | Barium compounds |
| Answer» B. Ca compounds | |
| 121. |
The relative stability of oxidation states +2 and +4 decreases |
| A. | down the group |
| B. | across the period |
| C. | up the group |
| D. | diagonally |
| Answer» B. across the period | |
| 122. |
On hydration, [Al(H₂O)₆]³⁺ (aq) produces |
| A. | H⁺ and [Al(H₂O)₅]²⁺(aq) |
| B. | H₂(g) and [Al(H₂O)₄]²⁺(aq) |
| C. | H₂(g) and [Al(H₂O)₃]+(aq) |
| D. | none of above |
| Answer» B. H₂(g) and [Al(H₂O)₄]²⁺(aq) | |
| 123. |
When iron reacts with oxygen in the presence of water it produces |
| A. | oil |
| B. | gas |
| C. | rust |
| D. | acid |
| Answer» D. acid | |
| 124. |
Reduction involves |
| A. | gain in hydrogen |
| B. | loss of oxygen |
| C. | loss of hydrogen |
| D. | both a and b |
| Answer» E. | |
| 125. |
In Copper(II) Oxide (CuO) and Carbon Monoxide (CO) reaction, |
| A. | CuO is being oxidized |
| B. | CuO is being reduced |
| C. | CO is being reduced |
| D. | CO is being oxidized |
| Answer» C. CO is being reduced | |
| 126. |
Non-metals are good at |
| A. | accepting electrons |
| B. | sharing electrons |
| C. | donating electrons |
| D. | both a and b |
| Answer» E. | |
| 127. |
Atom or ion is more reduced when there is higher |
| A. | negative oxidation |
| B. | positive oxidation |
| C. | negative reduction |
| D. | positive reduction |
| Answer» B. positive oxidation | |
| 128. |
Consider the reaction: Al₂O₃+NaOH + H₂O (l) → NaAl(OH)₄ (aq). The moles of NaOH required to balance the equation are |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 129. |
The acidic molecules formed by non-metals of Period 3, act as |
| A. | acids |
| B. | bases |
| C. | alkali |
| D. | oxide |
| Answer» B. bases | |
| 130. |
Oxidation state +2 of a compound have greater ionic character than oxidation state of |
| A. | +1 |
| B. | +3 |
| C. | +4 |
| D. | +5 |
| Answer» D. +5 | |
| 131. |
The species gaining electrons will be reduced and act as |
| A. | reducing agent |
| B. | oxidizing agent |
| C. | neutralizing agent |
| D. | reagent |
| Answer» C. neutralizing agent | |
| 132. |
Gain of oxygen (O⁻²) by an element is termed as |
| A. | reduction |
| B. | oxidation |
| C. | catalysis |
| D. | hydrolysis |
| Answer» C. catalysis | |
| 133. |
If the reactants are H₂SO₄ and H₂O, the products will include |
| A. | O₂ |
| B. | SO₂ |
| C. | H₃O⁺ |
| D. | SO₃ |
| Answer» D. SO₃ | |
| 134. |
Phenols undergo nitration in concentrated nitric acid to produce |
| A. | nitro phenol |
| B. | dinitrophenol |
| C. | trinitriphenol |
| D. | tetra phenol |
| Answer» D. tetra phenol | |
| 135. |
Element that has oxidation greater than +4 is |
| A. | Na |
| B. | Mg |
| C. | Si |
| D. | P |
| Answer» E. | |
| 136. |
The oxidation number of P in PCl₅ is |
| A. | +2 |
| B. | +3 |
| C. | +4 |
| D. | +5 |
| Answer» E. | |
| 137. |
Gain of oxygen is known as |
| A. | oxidation |
| B. | reduction |
| C. | halogenation |
| D. | chlorination |
| Answer» B. reduction | |
| 138. |
Metal that is hydrolyzed most vigorously is |
| A. | Mg |
| B. | Sr |
| C. | Be |
| D. | Ca |
| Answer» C. Be | |
| 139. |
+7 is the oxidation number of |
| A. | Mg |
| B. | Al |
| C. | Ar |
| D. | Cl |
| Answer» E. | |
| 140. |
A reductant |
| A. | removes oxygen |
| B. | donates electrons |
| C. | both a and b |
| D. | is the oxidising agent |
| Answer» D. is the oxidising agent | |
| 141. |
A number which is assigned to each atom or ion in a compound which explains its degree of oxidation is called |
| A. | oxidation state only |
| B. | oxidation number |
| C. | oxidation degree only |
| D. | oxidation state and number |
| Answer» E. | |
| 142. |
The maximum oxidation number increases |
| A. | across the group |
| B. | down the column |
| C. | across the period |
| D. | down the group |
| Answer» D. down the group | |
| 143. |
The greater the difference in electronegativity of Oxygen and Period 3 elements, the highly likely is the formation of |
| A. | Ionic bonds |
| B. | Covalent bonds |
| C. | Dative Covalent Bonds |
| D. | Metallic bonds |
| Answer» B. Covalent bonds | |
| 144. |
The reactions which cost a lot of money are the ones which are |
| A. | oxidation reaction |
| B. | reduction reaction |
| C. | redox reaction |
| D. | condensation reaction |
| Answer» B. reduction reaction | |
| 145. |
Salts of common acids doesn't contain in its nomenclature the |
| A. | oxidation number |
| B. | reduction number |
| C. | charge |
| D. | proton number |
| Answer» B. reduction number | |
| 146. |
The oxidation number of Argon upon reaction with oxygen is |
| A. | 0 |
| B. | +1 |
| C. | +2 |
| D. | +3 |
| Answer» B. +1 | |
| 147. |
The oxide state of transition elements can be changed by treating it with a suitable |
| A. | reactant |
| B. | catalyst |
| C. | reagent |
| D. | none of above |
| Answer» D. none of above | |
| 148. |
The by-products of reaction MgCl₂ + H₂O, if HCl is allowed to react, will be |
| A. | MgO(s) only |
| B. | Mg(OH)₂(s) only |
| C. | HMgO₂(s) |
| D. | MgO(s) and Mg(OH)₂(s) |
| Answer» E. | |
| 149. |
If one half of an equation shows oxidation and remaining half reflects reduction then we call them as |
| A. | half equation |
| B. | oxidation equation |
| C. | reduction equation |
| D. | Redox-equation |
| Answer» B. oxidation equation | |
| 150. |
The loss of oxygen from an element is simple |
| A. | oxidation |
| B. | reduction |
| C. | Redox |
| D. | hydrolysis |
| Answer» C. Redox | |