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21 . The property of metal by which it can be drawn into wires is called
A. Ductility B. Decorating
C. Malleability D. Conductivity

22 . The metals that produce ringing sounds, are said to be
A. Hard B. Lustrous
C. Sonorous D. Malleable

23 . Which metal is found in liquid state of room temperature?
A. Al B. Fe
C. Zn D. Hg

24 . The solution of ash of magnesium ribbon is-
A. Basic B. Acidic
C. Neutral D. All of these

25 . What is the product when sulphur reacts with oxygen?
A. Sulphuric acid B. Sulphur trioxide
C. Sulphur dioxide D. Sulphurous acid