MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is/are hard water(s) |
| A. | Water containing some potash alum |
| B. | Water containing a few drops of HCl |
| C. | Water containing common salt |
| D. | Water containing calcium nitrate |
| Answer» B. Water containing a few drops of HCl | |
| 2. |
Hydrogen can be obtained from water by |
| A. | Reaction with metal oxides |
| B. | Reaction with non-metal oxides |
| C. | Reaction with metals |
| D. | Reaction with metal hydrides |
| Answer» D. Reaction with metal hydrides | |
| 3. |
Hydrogen peroxide is |
| A. | A stronger acid than water |
| B. | A weaker acid than water |
| C. | An oxidising agent |
| D. | A reducing agent |
| Answer» B. A weaker acid than water | |
| 4. |
Hardness producing salt, whose solubility in water decreases with rise of temperature is |
| A. | \[CaC{{l}_{2}}\] |
| B. | \[CaS{{O}_{4}}\] |
| C. | \[Ca{{(HC{{O}_{3}})}_{2}}\] |
| D. | \[MgS{{O}_{4}}\] |
| Answer» C. \[Ca{{(HC{{O}_{3}})}_{2}}\] | |
| 5. |
A sample of water contains sodium chloride. It is |
| A. | Hard water |
| B. | Soft water |
| C. | Moderately hard |
| D. | None of these |
| Answer» C. Moderately hard | |
| 6. |
Plumbosolvency is a health hazard in the transportation of |
| A. | Hard water only |
| B. | Soft water only |
| C. | Both a and b |
| D. | Water containing plum juice |
| Answer» C. Both a and b | |
| 7. |
Hydrogen can be produced by heating |
| A. | Cu with \[{{H}_{2}}S{{O}_{4}}\] |
| B. | Sodium formate |
| C. | Sodium oxalate |
| D. | None of these |
| Answer» C. Sodium oxalate | |
| 8. |
The most abundant element in the universe is |
| A. | Carbon |
| B. | Silicon |
| C. | Hydrogen |
| D. | Helium |
| Answer» D. Helium | |
| 9. |
\[{{D}_{2}}O\] is preferred to \[{{H}_{2}}O\], as a moderator, in nuclear reactors because |
| A. | \[{{D}_{2}}O\] slows down fast neutrons better |
| B. | \[{{D}_{2}}O\] has high specific heat |
| C. | \[{{D}_{2}}O\] is cheaper |
| D. | None of these |
| Answer» E. | |
| 10. |
Hydrogen can behave as a metal |
| A. | At very high temperature |
| B. | At very low temperature |
| C. | At very high pressure |
| D. | At very low pressure |
| Answer» D. At very low pressure | |
| 11. |
Hydrogen is evolved by the action of cold dil. \[HN{{O}_{3}}\] on [IIT 1998] |
| A. | Fe |
| B. | Mn |
| C. | Cu |
| D. | Al |
| Answer» C. Cu | |