Monday, March 3, 2025

Chemical Bonding QP/ Marks 20/ 2025

Grade 10. ICSE 
Topic Chemical bonding.          Marks 20.      

1.  With the help of electron dot structure explain bonding in CaO.                          (3)
A. State the name of the bonding. 
B. Draw electron dot structure.
 
2. Draw electron dot structure of Methane.                                                                  (3)

3. Define giving examples.                                                                                             (6)
A. Ionic bond
B. Covalent Bond
C. Polar Covalent bond.

4. Elements X, Y, and Z have atomic numbers 6, 9 and 12 respectively. Which one forms an anion?                                                                                                                         (1)

5. State giving examples lone pair of electrons.                                                        (1)

6. In the molecule of nitrogen.                                                                                    (6)
A. How many atoms are there?
B. What is the atomic number of nitrogen?
C. Write the electronic configuration. 
D. Is it a metal or a non metal,why.
E. Draw electron dot structure of its molecule.
F. State the type of bonding.                    

 



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