InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
`2AgNO_(3)(aq)+Zn(s) to _____ +_____` |
| Answer» `Zn(NO_(3))_(2) (aq ) +2Ag(s)` | |
| 2. |
Bauxite is the most important ore ofA. aluminiumB. ironC. copperD. lead |
| Answer» Correct Answer - C | |
| 3. |
Why do silver articles become black on prolonged exposure to air ? |
|
Answer» Silver articles react with hydrogen sulphide gas present in air to from black silver sulphide. ` 2Ag + H_(2)S to underset(" Silver sulphide") (Ag_(2)S) +H_(2)` |
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| 4. |
Which of the following metals exist in free state in nature ? Cu , Al , Mg , Au , Fe , Ag |
| Answer» Correct Answer - Au and Ag | |
| 5. |
Zinc is used for the galvanization of ______ |
| Answer» Correct Answer - iron | |
| 6. |
In the electrolytic refining of copper , copper isA. deposited at the anodeB. deposited at the cathodeC. deposited below the cathode as cathode mudD. left behind in solution as copper ions |
| Answer» Correct Answer - B | |
| 7. |
Why is copper used in making electrical wires ? |
| Answer» Copper is a good conductor of electricity and, being ductile, it can drawn into wires. | |
| 8. |
Carbon reduction process is used to obtainA. ironB. sodiumC. calciumD. zinc |
| Answer» Correct Answer - A::D | |
| 9. |
Which of the following sequence of metals is in the order of their increasing electrical conductivity ?A. Cu ` lt Au lt Ag lt Al`B. `Au lt Al lt cu lt Ag `C. `AI lt Au lt Cu lt Ag`D. `AI lt Cu lt Au lt Ag` |
| Answer» Correct Answer - C | |
| 10. |
Which of the following metals do react with dilute `HNO_(3)` with the liberation of hydrogen gas ?A. CaB. MgC. FeD. Mn |
| Answer» Correct Answer - B::D | |
| 11. |
Metals below hydrogen in the activity series canA. react with acids to liberate hydrogen ionsB. react with acids to liberate hydrogen gasC. react with water at ordinary tempertureD. none of these |
| Answer» Correct Answer - D | |
| 12. |
The number of electrons in the outermost shell of a nonmetal can beA. 1,2,3 or 4B. 2,3,4 or 5C. 4,5,6,7 or 8D. 4,5,0 or 2] |
| Answer» Correct Answer - C | |
| 13. |
Because of high electropositively, the atoms of metals can easly formA. positive ionsB. negative ionsC. neutral ionsD. covalent bonds |
| Answer» Correct Answer - A | |