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ENTRANCE TEST – 2008 Multiple Questions and Answers.
| 21. | he elements of IIIA to VIIIA subgroups except He are known as __________ block elements. | ||
| A. | q. | ||
| B. | S. | ||
| C. | p. | ||
| D. | None of these | ||
| 22. | Concentrated nitric acid gives __________ when it reacts with tin. | ||
| A. | Nitric oxide | ||
| B. | Meta stannic acid. | ||
| C. | Aluminum Nitrite | ||
| D. | None of these | ||
| 23. | Sulphuric acid is used to manufacture | ||
| A. | HCl and HNO3. | ||
| B. | H3PO4. | ||
| C. | Both A and B. | ||
| D. | Both HCl and 2COOH. | ||
| 24. | Alkanes containing __________ carbon atoms are waxy solids. | ||
| A. | Up to 4 | ||
| B. | 5 to 17 | ||
| C. | 18 or more. | ||
| D. | None of these | ||
| 25. | Which of the following is used to make chloral hydrate? | ||
| A. | Acetaldehyde. | ||
| B. | Formaldehyde. | ||
| C. | Both A and B | ||
| D. | None of these | ||
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