MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Uncategorized topics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When electrodes are immersed in water and electricity passed, the bubbles formed on the positive terminal is actually _______ gas. |
| A. | Hydrogen |
| B. | Carbon di oxide |
| C. | Oxygen |
| D. | Nitrogen |
| Answer» D. Nitrogen | |
| 2. |
When electrodes are immersed in water and electricity passed, the bubbles formed on the negative terminal is actually _______ gas. |
| A. | Hydrogen |
| B. | Carbon di oxide |
| C. | Oxygen |
| D. | Nitrogen |
| Answer» B. Carbon di oxide | |
| 3. |
Why do we add little dilute sulphuric acid to copper sulphate solution during electroplating? |
| A. | To increase acidity |
| B. | To increase conductivity |
| C. | So that the colour becomes more prominent |
| D. | To burn copper sulphate |
| Answer» C. So that the colour becomes more prominent | |
| 4. |
Chromium plating is done on many objects such as car parts, bath taps, kitchen gas stove etc. Why? |
| A. | It does not corrode but prevents scratches |
| B. | It looks beautiful |
| C. | It costs less |
| D. | Articles can be sold at higher price |
| Answer» B. It looks beautiful | |
| 5. |
A coating of _________is deposited on iron to protect it from corrosion and formation of rust |
| A. | copper |
| B. | aluminium |
| C. | Zinc |
| D. | silver |
| Answer» D. silver | |
| 6. |
The process of depositing a layer of any desired metal on another material by means of electricity is called ___________. |
| A. | Electric plating |
| B. | Electroplating |
| C. | Electric depositing |
| D. | None of the above |
| Answer» C. Electric depositing | |
| 7. |
Some liquids are good conductors of electricity and some are poor conductors. Which one is a poor conductor? |
| A. | Acidic solution |
| B. | Alkaline solution |
| C. | Common Salt solution |
| D. | Distilled water |
| Answer» E. | |