MCQOPTIONS
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MCQOPTIONS
This section includes 181 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
Overhead cables are insulated from pylons through |
| A. | plastic |
| B. | ceramics and glass |
| C. | rubber |
| D. | PVC |
| Answer» C. rubber | |
| 152. |
Materials which can retain their strength above 550 °C are known as |
| A. | ceramics |
| B. | refractories |
| C. | metals |
| D. | non-metals |
| Answer» C. metals | |
| 153. |
In electrolysis of aqueous Copper(II) Sulfate (CuSO₄) with Carbon (C) electrode, |
| A. | oxygen gas is given off at anode |
| B. | Sulfur dioxide is given off at anode |
| C. | oxygen gas is given off at cathode |
| D. | Sulfur dioxide is given off at cathode |
| Answer» B. Sulfur dioxide is given off at anode | |
| 154. |
In a dry cell, function of zinc casing is to |
| A. | act as the negative electrode |
| B. | act as the positive terminal |
| C. | hold the carbon rod |
| D. | act as electrolyte |
| Answer» B. act as the positive terminal | |
| 155. |
In electrolysis of dilute Hydrochloric Acid (HCl(aq)), at anode, |
| A. | oxygen gas is given off |
| B. | hydrogen gas is given off |
| C. | chlorine gas is given off |
| D. | hydrogen chloride gas is given off |
| Answer» B. hydrogen gas is given off | |
| 156. |
Metals which are high in reactivity series are used to extract |
| A. | metals |
| B. | oils |
| C. | non-metals |
| D. | metalloids |
| Answer» D. metalloids | |
| 157. |
In electrolysis of H₂SO₄ (aq), at anode |
| A. | Sulphate ions are discharged |
| B. | hydroxide ions are difficult to discharge |
| C. | oxygen gas is given off |
| D. | SO₂ fumes can be collected |
| Answer» D. SO₂ fumes can be collected | |
| 158. |
Cathodic reduction refers to |
| A. | loss of electrons at the anode |
| B. | gain of electrons at the cathode |
| C. | loss of electrons at the cathode |
| D. | gain of electrons at the anode |
| Answer» C. loss of electrons at the cathode | |
| 159. |
1 faraday is equal to |
| A. | 96500 °C |
| B. | 12700 °C |
| C. | 987690 °C |
| D. | 96000 °C |
| Answer» B. 12700 °C | |
| 160. |
What is true about Ceramics? |
| A. | it is hard only |
| B. | it is unreactive only |
| C. | reactive |
| D. | it is hard and unreactive |
| Answer» E. | |
| 161. |
Two chemical-related species will undergo Redox reaction if they are in different |
| A. | oxidation states |
| B. | reducing states |
| C. | returning states |
| D. | reversing states |
| Answer» B. reducing states | |
| 162. |
Polarization is a property applying to transverse waves and it refers to |
| A. | prevention of electricity flowing in an electrolyte solution |
| B. | rapid dissolving of magnesium in dilute acid |
| C. | slow dissolving of magnesium in concentrated acid |
| D. | electricity flowing in an electrolyte solution |
| Answer» B. rapid dissolving of magnesium in dilute acid | |
| 163. |
The process of electrolysis is carried out in an |
| A. | electrolytic cell |
| B. | spectrometer |
| C. | calorimeter |
| D. | barometer |
| Answer» B. spectrometer | |
| 164. |
Half cells contain two ions of same element with different |
| A. | atomic mass |
| B. | oxidation state |
| C. | nucleon number |
| D. | electronic configuration |
| Answer» C. nucleon number | |
| 165. |
In electrolysis, the very high current is passed which is equal to |
| A. | 40,000 A |
| B. | 20,000 A |
| C. | 30,000 A |
| D. | 10,000 A |
| Answer» B. 20,000 A | |
| 166. |
In electrolysis of aqueous Copper Sulfate CuSO₄, at cathode |
| A. | pink deposit of copper metal is deposited |
| B. | hydrogen gas is given off |
| C. | hydrogen ions are easier to discharge than copper ions |
| D. | Cu+2 forms crystals |
| Answer» B. hydrogen gas is given off | |
| 167. |
Paraffin is an example of |
| A. | strong electrolyte |
| B. | non-electrolyte |
| C. | weak electrolyte |
| D. | catalyst |
| Answer» C. weak electrolyte | |
| 168. |
Particles in a liquid are colliding more frequently due to their |
| A. | random movement |
| B. | viscosity |
| C. | density |
| D. | volume |
| Answer» B. viscosity | |
| 169. |
A salt bridge is made from a strip of filter paper dipped in saturated |
| A. | silver nitrate |
| B. | potassium nitrate |
| C. | calcium nitrite |
| D. | magnesium nitrite |
| Answer» C. calcium nitrite | |
| 170. |
Brine is gained from dissolving rock salt in |
| A. | acid |
| B. | base |
| C. | alcohol |
| D. | water |
| Answer» E. | |
| 171. |
One of the oxides among the four given below, the best electrical conductor is |
| A. | Na₂O |
| B. | Al₂O₃ |
| C. | MgO |
| D. | all of above |
| Answer» E. | |
| 172. |
A battery converts |
| A. | chemical energy to kinetic energy |
| B. | chemical energy to electrical energy |
| C. | electrical to chemical energy |
| D. | kinetic energy to chemical and electrical energy |
| Answer» C. electrical to chemical energy | |
| 173. |
Most of organic solvents are |
| A. | strong electrolyte |
| B. | non-electrolyte |
| C. | weak electrolyte |
| D. | poor insulators |
| Answer» C. weak electrolyte | |
| 174. |
In electrolysis of concentrated HCl, at cathode |
| A. | oxygen gas is given off |
| B. | hydrogen gas is given off |
| C. | chlorine gas is given off at anode |
| D. | hydrogen chloride is given off |
| Answer» D. hydrogen chloride is given off | |
| 175. |
In electrolysis of brine, ions moving to anode include |
| A. | sodium + hydrogen ions |
| B. | hydroxide + Chloride ions |
| C. | sodium + hydroxide ions |
| D. | chloride ions + hydrogen gas |
| Answer» C. sodium + hydroxide ions | |
| 176. |
Difficulty of discharge is highest in |
| A. | calcium ions |
| B. | copper ions |
| C. | lead ions |
| D. | silver ions |
| Answer» B. copper ions | |
| 177. |
Aluminum (Al) is preferred in overhead power cables because |
| A. | it is a good conductor |
| B. | it acts as an insulator, in case of lightening |
| C. | it prevents accidents |
| D. | it is lighter in weight |
| Answer» E. | |
| 178. |
Reactivity series of metals is also called as the |
| A. | preferential series |
| B. | electrochemical series |
| C. | electrolytic series |
| D. | selective discharge series |
| Answer» C. electrolytic series | |
| 179. |
Electricity is measured through a device called as |
| A. | Ammeters |
| B. | Voltmeters |
| C. | Barometers |
| D. | Anemometers |
| Answer» B. Voltmeters | |
| 180. |
Any reaction at an anode involves |
| A. | gain of electrons |
| B. | loss of electrons |
| C. | gain or loss depends upon the electrolyte |
| D. | formation of gases |
| Answer» C. gain or loss depends upon the electrolyte | |
| 181. |
If molten Lead Bromide (PbBr₂) is electrolyzed, |
| A. | at anode, brown fumes of bromide gas are given off |
| B. | at anode, molten lead can be seen |
| C. | at cathode, brown fumes can be seen |
| D. | at cathode, lead bromide can be seen |
| Answer» B. at anode, molten lead can be seen | |