MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The main factor for the cause of lanthanide contraction is poorer shielding of 5d electrons by 4f electrons. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Among d-block elements, the most abundant element belongs to the first transition state. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
What is the common oxidation state of scandium? (At. No. of Sc = 21) |
| A. | 4 |
| B. | +3 |
| C. | +1 |
| D. | +5 |
| Answer» C. +1 | |
| 4. |
Why does Zinc not show variable valency? |
| A. | Complete ‘d’ subshell |
| B. | Inert pair effect |
| C. | 4s2 subshell |
| D. | 4s3 subshell |
| Answer» B. Inert pair effect | |
| 5. |
Where does the last electron of d-block element go? |
| A. | nd |
| B. | (n-1)d |
| C. | np |
| D. | (n-1)s |
| Answer» C. np | |
| 6. |
What is the oxidation state exhibited by actinium? |
| A. | 4 |
| B. | +1 |
| C. | +2 |
| D. | +3 |
| Answer» E. | |
| 7. |
Which of the following has the highest atomic number? |
| A. | Scandium |
| B. | Titanium |
| C. | Cadmium |
| D. | Lanthanum |
| Answer» E. | |
| 8. |
Why do transition elements form alloys so easily? |
| A. | Atomic size |
| B. | Orbital configuration |
| C. | Very light |
| D. | Hard elements |
| Answer» B. Orbital configuration | |
| 9. |
Which of the following are d-block elements, but not regarded as transition elements? |
| A. | Ru, Ag, Au |
| B. | Zn, Ru, Pd |
| C. | Zn, Cd, Hg |
| D. | Cd, Rh, Pd |
| Answer» D. Cd, Rh, Pd | |