Download CBSE Guess Papers Chemistry Class XI (11th) 2009

Guess Paper – 2009

Class – XI

Subject – Chemistry

(SET-1)

Max. marks : 40                    Time : 1.5 hours

Lessons: Some Basic Concepts Of Chemistry, Structure Of Atom

Instructions: All questions are compulsory.

Questions 1 to 3 carry 1 mark each.

Questions 4 to 8 carry 2 marks each.

Questions 9 to 12 carry 3 marks each.

Questions 13 to 15 carry 5 marks each.

1. What is the lowest value of n that allows g-orbital to exist?

2. Write the electronic configuration of:      i) O2-      ii) Cu+

3. Define molality of a solution.

4. Designate the orbitals with the following quantum numbers:

i)n=1,l=0    ii)n=3,l=1    iii)n=4,l=2    iv)n=4,l=3

5. Calculate the mass of iron which will be converted into its oxide (Fe3O4) by the action of 18g of steam on it?(Atomic mass of Fe=56,O=16)

6. If 20g of CaCO3 is treated with 20g of HCl, how many grams of CO2 will be produced? Specify the limiting reagent. (Molar mass of CaCO3=100, HCl=36.5)

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