Metal which is used in packaging and has a valency of $+ 3$ is:

aluminium

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copper

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lead

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potassium

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iron

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silver

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Solution

The correct option is B aluminium
Elements having 1, 2 or 3 valence electrons are called metals. It is the metal aluminum which is commonly used as packaging materials or foils to preserve the food and it has atomic number 13, with +3 valence electrons in the outermost electron shell. The presence of valence electrons can determine elements chemical properties.

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Q. Which mineral is used extensively in the packaging of food products?

Name

(a) An alkali metal in period 3 and halogen in period 2.

(b) The noble gas with 3 shells.

(d) The element of period 3 with valency 4.

(e) The elements i period 3 which does not form oxide.

(f) The element of lower nuclear charge out of Be and Mg.

(g) Which has higher E.A., Fluorine or Neon.

(h) Which has maximum metallic character Na, Li or K.

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Metal which is used in packaging and has a valency of +3 is:

Metal which is used in packaging and has a valency of $+ 3$ is: