MCQOPTIONS
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MCQOPTIONS
This section includes 150 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
The less amount of attraction between the nucleus and outer electrons is due to |
| A. | increase in distance only |
| B. | increase in shielding effect only |
| C. | decrease in distance |
| D. | increase in distance and shielding effect |
| Answer» E. | |
| 102. |
In order to form an oxygen molecule (O₂), the number of electrons (e⁻) needed to complete the outermost shell are |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 103. |
Chlorate ion is the |
| A. | oxidizing agents |
| B. | reducing agents |
| C. | bleaching agent |
| D. | none of above |
| Answer» D. none of above | |
| 104. |
Compound that is electron (e⁻) deficient is |
| A. | Al₂Cl₆ |
| B. | AlBF₃ |
| C. | SF₆ |
| D. | BF₃ |
| Answer» E. | |
| 105. |
Acid salts cannot be formed by |
| A. | Sulphuric acid |
| B. | Carbonic acid |
| C. | Hydrochloric acid |
| D. | Phosphoric acid |
| Answer» D. Phosphoric acid | |
| 106. |
In compost, the reaction takes place among |
| A. | weak acids only |
| B. | weak bases only |
| C. | strong bases and acids |
| D. | weak acid and bases |
| Answer» E. | |
| 107. |
The quality to attract electrons and distort an anion is called |
| A. | charge power |
| B. | ion power |
| C. | lattice power |
| D. | polarizing power |
| Answer» E. | |
| 108. |
Consider equation: Zn+2(aq) + 2OH-(aq) → Zn(OH)₂(s). precipitate of Zinc Hydroxide will be of |
| A. | green color |
| B. | blue color |
| C. | brown color |
| D. | white color |
| Answer» E. | |
| 109. |
In an optimum temperature, Chlorine reacts with dilute alkalis by |
| A. | oxidizing some atoms only |
| B. | reducing some atoms only |
| C. | neutralizing some ions |
| D. | oxidizing and reducing some atoms |
| Answer» E. | |
| 110. |
Greater polarization of carbonate ion will result in weak |
| A. | C-H bond |
| B. | C-C bond |
| C. | H-H bond |
| D. | C=C bond |
| Answer» B. C-C bond | |
| 111. |
In order to test presence of Chlorides, |
| A. | dilute HNO₃ + Ag(NO₃)₂ shall be added |
| B. | dilute HCl shall be added |
| C. | dilute NaOH shall be added |
| D. | dilute KOH shall be added |
| Answer» B. dilute HCl shall be added | |
| 112. |
All are soluble but |
| A. | nitrates |
| B. | ammonium salts |
| C. | sodium salts |
| D. | majority of carbonates |
| Answer» E. | |
| 113. |
In the formation of oxygen molecule (O₂), |
| A. | single covalent bond is formed |
| B. | double covalent bond is formed |
| C. | dative covalent bond is formed |
| D. | metallic covalent bond is formed |
| Answer» C. dative covalent bond is formed | |
| 114. |
In magnesium oxide, the electronic configuration of oxygen is that of |
| A. | hydrogen(g) |
| B. | Helium(g) |
| C. | Neon(g) |
| D. | Argon(g) |
| Answer» D. Argon(g) | |
| 115. |
Keeping in mind the ethane molecule (C₂H₆), the incorrect statement is |
| A. | A double covalent bond is formed. |
| B. | Two hydrogen atoms share a pair of electrons with each other. |
| C. | Two hydrogen atoms share a pair of electrons with carbon atom. |
| D. | Each carbon atom shares 2 pairs of electrons with each other. |
| Answer» C. Two hydrogen atoms share a pair of electrons with carbon atom. | |
| 116. |
When ions of opposite charges come together to form a crystal lattice is called |
| A. | bond energy |
| B. | crystal energy |
| C. | lattice energy |
| D. | none of above |
| Answer» D. none of above | |
| 117. |
Kazimier Fajans drew a set of rules about |
| A. | polarization |
| B. | lattice energy |
| C. | thermal stability |
| D. | reaction kinetics |
| Answer» B. lattice energy | |
| 118. |
Increase in radius of metal ion will decrease its |
| A. | solubility |
| B. | polarity |
| C. | ductility |
| D. | malleability |
| Answer» B. polarity | |
| 119. |
The ionic equation O⁻²(aq)+ H₂O(l) → 2OH⁻. This will result in an |
| A. | acidic solution |
| B. | alkaline solution |
| C. | Acidic and Alkaline solution |
| D. | salt solution |
| Answer» C. Acidic and Alkaline solution | |
| 120. |
There is more stability in carbonate its oxide and carbon dioxide with more positive |
| A. | enthalpy change |
| B. | polarizability |
| C. | charge |
| D. | reaction chain |
| Answer» B. polarizability | |
| 121. |
The charge on any ion depend upon the gain or loss of |
| A. | electron |
| B. | protons |
| C. | neutrons |
| D. | positrons |
| Answer» B. protons | |
| 122. |
The decrease in the force of attraction is due to the increase in the |
| A. | distance only |
| B. | shielding effect only |
| C. | number of electrons |
| D. | distance and shielding effect |
| Answer» E. | |
| 123. |
The energy level which is closest to nucleus has |
| A. | lowest energy |
| B. | highest energy |
| C. | neutral |
| D. | medium energy |
| Answer» B. highest energy | |
| 124. |
Boron has one more proton than |
| A. | helium |
| B. | beryllium |
| C. | carbon dioxide |
| D. | nitrogen |
| Answer» C. carbon dioxide | |
| 125. |
If hydrogen (H+) of an acid is fully replaced by a metal, product is a |
| A. | neutral oxides |
| B. | amphoteric oxides |
| C. | acid salt |
| D. | salt |
| Answer» E. | |
| 126. |
Evaporation of solution of CuSO₄ helps in |
| A. | making it concentrated |
| B. | crystallization of CuSO₄ |
| C. | evaporation of salt CuSO₄ |
| D. | both a and b |
| Answer» E. | |
| 127. |
Number of hydrogen atoms in an acid which can be replaced by a metal is called |
| A. | tribasic |
| B. | basicity |
| C. | acidity |
| D. | amphoteric oxides |
| Answer» C. acidity | |
| 128. |
Metal oxides or metal hydroxides form |
| A. | acids |
| B. | base |
| C. | salt solution |
| D. | sugar solution |
| Answer» C. salt solution | |
| 129. |
Salts are formed when |
| A. | acids neutralize bases |
| B. | acids neutralize alkalis |
| C. | acids react with a metal |
| D. | all of these |
| Answer» E. | |
| 130. |
No heating is required when to form salts, acids react with |
| A. | metal carbonates |
| B. | metal oxides |
| C. | Metal hydroxides |
| D. | metal chlorides |
| Answer» B. metal oxides | |
| 131. |
Consider reaction: AgNO₃ + NaCl → AgCl + NaNO₃. state of AgCl will be |
| A. | solid |
| B. | aqueous |
| C. | gas |
| D. | liquid |
| Answer» B. aqueous | |
| 132. |
Filtrate of Copper Sulfate (CuSO₄) is of |
| A. | blue color |
| B. | violet color |
| C. | purple color |
| D. | brown color |
| Answer» B. violet color | |
| 133. |
Consider reaction: CuO + H₂SO₄ → CuSO₄ + H₂O. excess Copper Oxide (CuO) is added, |
| A. | so that more mass of salt is formed |
| B. | so as to neutralize excess acid |
| C. | to ease the salt crystallization |
| D. | to help salt retain the water of crystallization |
| Answer» C. to ease the salt crystallization | |
| 134. |
Acid salts do not include |
| A. | calcium phosphate |
| B. | sodium dihydrogen phosphate |
| C. | sodium hydrogen sulphate |
| D. | calcium hydrogen carbonate |
| Answer» B. sodium dihydrogen phosphate | |
| 135. |
Incorrect option is: Anions... |
| A. | are negatively charged |
| B. | travel to anode during electrolysis |
| C. | travel to cathode during electrolysis |
| D. | along with a cation forms an ionic salt |
| Answer» D. along with a cation forms an ionic salt | |
| 136. |
If metal hydroxide and acid reaction to form Potassium Nitrate (KNO₃), reactants will be |
| A. | K + HNO₃ |
| B. | KOH + HNO₂ |
| C. | KOH + HNO₃ |
| D. | KOH₂+ HNO₃ |
| Answer» D. KOH₂+ HNO₃ | |
| 137. |
In nitrogen molecule, the number of electrons required by each nitrogen atom in the outer shell is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 138. |
The enthalpy change of solution involves release or absorption of energy by adding 1 mole of ionic solid in sufficient |
| A. | alcohol |
| B. | water |
| C. | gas |
| D. | base |
| Answer» C. gas | |
| 139. |
Complete transfer of one or more electrons from one atom to different atom forms |
| A. | ionic bonds |
| B. | covalent bonds |
| C. | metallic bonding |
| D. | co-ordinate bonding |
| Answer» B. covalent bonds | |
| 140. |
Number of replaceable hydrogen atoms in phosphoric acid is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 141. |
Lead carbonate (PbCO₃) only dissolves 0.00017g in dm³ of water, hence it is regarded as |
| A. | soluble |
| B. | insoluble |
| C. | partially soluble |
| D. | partially insoluble |
| Answer» C. partially soluble | |
| 142. |
A dot and cross diagram reflects |
| A. | outer electron shells only |
| B. | charge of ion only |
| C. | neutrons and protons in a nucleus |
| D. | outer electron shells and charge of ions |
| Answer» E. | |
| 143. |
The nuclear charge down the group |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | constant |
| Answer» B. decreases | |
| 144. |
Consider equation: Fe+2(aq) + 2OH-(aq) → Fe(OH)₂(s). precipitate of Iron(II) Hydroxide will be of |
| A. | green color |
| B. | blue color |
| C. | brown color |
| D. | white color |
| Answer» B. blue color | |
| 145. |
Upon reaction of carbonates with acids, product includes salt and |
| A. | H₂(g) |
| B. | H₂O |
| C. | CO |
| D. | CO₂ |
| Answer» E. | |
| 146. |
If metal hydroxide (-OH-) and acid (H+) reaction to form Potassium Nitrate (KNO₃), other by-product will be |
| A. | water |
| B. | hydrogen |
| C. | Carbon dioxide |
| D. | water and carbon dioxide |
| Answer» B. hydrogen | |
| 147. |
Incorrect statement is: Fizzy sweets _______ |
| A. | contain sodium hydrogen acetate. |
| B. | makes tongue feel cold. |
| C. | eating is an endothermic reaction. |
| D. | are produced in chewing food. |
| Answer» B. makes tongue feel cold. | |
| 148. |
Sufficient hemoglobin in blood can be tested by adding a drop of |
| A. | Zinc Sulphate |
| B. | Copper Sulphate |
| C. | Magnesium Sulphate |
| D. | Potassium Sulphate |
| Answer» C. Magnesium Sulphate | |
| 149. |
Consider reaction: AgNO₃ + NaCl → AgCl + NaNO₃. state of NaNO₃ will be |
| A. | solid |
| B. | aqueous |
| C. | gaseous |
| D. | liquid |
| Answer» C. gaseous | |
| 150. |
If hydrogen (H) of an acid (H+) is partially replaced by a metal, it forms |
| A. | neutral oxides |
| B. | amphoteric oxides |
| C. | acid salt |
| D. | salt |
| Answer» D. salt | |