Entry Test MCQ :: Group III A and IVA Elements
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| 1. |
Boron is non-netal whereas A1 is metal. It is due to |
| A. |
Small size |
B. |
High nuclear charge |
| C. |
Both a and b |
D. |
No authorized justification yet |
Answer: Option C
Explanation:
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| 2. |
Boron in soil has been considered micronutrient for |
| A. |
Soil porocity |
B. |
Proper growth of plants |
| C. |
Alkalinity of soil |
D. |
All |
Answer: Option B
Explanation:
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| 3. |
One of the outstanding features of boron is its ability to form |
| A. |
Molecular addition compounds |
B. |
Molecular crystals |
| C. |
Semiconductors |
D. |
Ionic compounds |
Answer: Option A
Explanation:
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| 4. |
Substance which is found in dried up lakes of Tibet and California is |
| A. |
Tincal |
B. |
Boric acid |
| C. |
Calcium carbonate |
D. |
Colemanite |
Answer: Option A
Explanation:
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| 5. |
Borax is a white crystalline solid and it is |
| A. |
More soluble in cold water |
B. |
More soluble in hot water |
| C. |
Insoluble in water |
D. |
Soluble only in organic solvents |
Answer: Option B
Explanation:
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| 6. |
Which of the following does not give Borax bead test? |
Answer: Option D
Explanation:
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| 7. |
Special features of borate glass is that it is |
| A. |
Heat resistant |
B. |
Low melting |
| C. |
Used to prepare chemical garden |
D. |
Green in colour |
Answer: Option A
Explanation:
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| 8. |
The metal which is used in thermite process because of its activity is |
Answer: Option C
Explanation:
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| 9. |
Aluminium oxide is |
| A. |
Acidic oxide |
B. |
Basic oxide |
| C. |
Amphoteric oxide |
D. |
It does not exists |
Answer: Option C
Explanation:
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| 10. |
Which of the following shows inert pair effect? |
Answer: Option D
Explanation:
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