important Multiple choice Questions -metal and non-metal

 

1. Which of the following elements is a metalloid ?

a)    Sodium       b) carbon         

c) silver               d. silicon

Ans- d

2.   The element ‘ X ’ burns in air to form an oxide. The aqueous

solution of this oxide turns blue litmus to red. The element X is

most likely to be                

a)    Calcium     b) carbon      

c) magnesium     d) potassium

Ans- b

3.   The element which is stored in water is ( )

a)    phosphorous     b) sodium   

c) potassium           d) zinc

Ans- c

4.   Which of the following is not a physical property of silver? 

a)   ductility           b) sonorous     

c) malleability     d) brittleness

 Ans- d

5.   The element which is stored in kerosene is ( )

a)   phosphorous    b) silicon      

c) sodium        d) iodine

 Ans- c

6.   The non-metal which exists in the liquid state at room temperature 

a)   chlorine            b) bromine    

c) iodine         d) fluorine

  Ans- b

7.   The least reactive metal among the following is

a)   potassium       b) zinc      

c) copper       d) iron

  Ans- c

8.   Which of the following gas is evolved when a metal reacts with dilute hydrochloric acid to form salt ?                                                                                       

a      a)    oxygen           b) nitrogen     

        c) hydrogen   d) both a & b

        Ans- c

    9.  When a vessel is exposed to moist air for a long time, then a green coating is formed on its surface. The vessel is made  of                                               

      a)   iron            b) silver       

      c) aluminium        d) copper

Ans- d

10. When a burning match stick is brought to the mouth of a test- tube containing zinc granule and dilute hydrochloric acid, the flame of the match stick is put off with pop sound by the evolved gas. The gas must be        

a) nitrogen      

b) oxygen             

c) chlorine                           

d) hydrogen

Ans- d

11. Which of the following pairs do not show displacement reaction? 

a) iron sulphate and zinc     

b) zinc sulphate and copper

c)   copper sulphate and iron   d) zinc and copper sulphate

 Ans- -b