MARKS- 25                                                                           TOPIC- METALS AND NON-METALS                          TIME- 45 MIN

 

QUE 1) Define Ductility ?                         (1)

QUE 2) The non- metal bromine exist in ________________________   state.    (1)

QUE 3) ______________________ is a lustrous non-metal.      (1)

QUE 4) Name two metals which poor conductors of heat. (1)

QUE 5) What are amphoteric oxides ? Explain with example. (3)

QUE 6) The reaction of _____________________________ metal forms black colour oxide when react with oxygen. (1)

QUE 7) Explain :- Metal oxides are basic in nature. (2)

QUE 8) What is anodising ? (1)

QUE 9) Calcium floats on water when mixed with it . why ? (2)

QUE 10) What is aqua regia ?      (2)

QUE 11) Write the equation for reaction of 

               a) Calcium with water

               b) Dilute sulphuric acid and metal                                                     (4)

 

QUE 12) Write electron dot structure of formation of MgO ?   (3)

QUE 13) Why do ionic compounds have high melting point ?    (2)

QUE 14 ) Hydrogen gas is not evolved when metal reacts with nitric acid. Why ?      (2)