Chemistry XI Content
HSEB Model Question for Chemistry – Class 11
Time : 3 hrs
Full Marks : 75
Attempt any Fifteen question : 15 × 2 = 30
Q.1. State Law of reciprocal proportion.
Q.2. The oxide of an element contains 67.67 % of oxygen and V.D. of its volatile chloride is 79
Q.3. Define surface tension of Liquid.
Q.4. Write down important differences between crystalline and amorphous solid.
Q.5. What is Pauli’s exclusion principle ?
Q.6. Give the values of all four quantum numbers of 11th electron of magnesium.(At. No. 12)
Q.7. What is radioactivity ?
Q.8. Write the Lewis structure of (a) H2O2 and (b) HNO3.
Q.9. Explain why HCL has polar character though it has covalent bond.
Q.10. State Modern Periodic law.
Q.12. State Le-Chateliers principles.
Q.13. What are the difference between nascent and molecular hydrogen ?
Q.15 What is allotropy ? Name the latest discover allotropic form of carbon.
Q.16. What is meant by acid rain ? Give one major effect of acid rain.
Q.17. Distinguish between flux and slag with one example of each.
Q.18. Can sodium be extracted by the electrolysis of aqueous solutions of sodium chloride ? If not why ?
Q.19. Define electrophile and nucleophile with an example of each.
Q.21. What is meant by thermal cracking and catalytic cracking ?
Attempt any five Question. 5 * 5 = 25
Q.23. Urea [(NH2)2CO] is prepared by reacting ammonia with carbon dioxide :
Attempt any two questions. : 2 × 10 = 20
Q.30. State Boyle’s law and Charles law. Derive PV=nRT. What is the density (in gram per liter) of ammonia at STP if the gas in a 1.0L bulb weights 0.672g at 25oC and 733.4 mm Hg pressure.