Q83 of 102 Page 79

Which of the following element is a metalloid?

Silicon is a metalloid. The elements whose properties are intermediate between the properties of metals and nonmetals are called Metalloids.

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81

Which of the following metal exists in the liquid state at room temperature?

 82

The element Z burns in air to form an oxide. The aqueous solution of this oxide turns blue litmus to red. The element Z is most likely to be:

 84

Which of the following elements will produce an oxide that will dissolve in water to form an acid?

 85

The least reactive metal among the following is: