Which of the following is incorrect?...

Which of the following is incorrect?

Metals are electropositive elements.

Metals usually have low ionzation enthalpies.

As we move down a group, the metallic character the element decrease.

Nonmetals are electronegative elements.

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The correct Answer is:

Down the group, the matellic character of the elements increases on account of decrease of ionization enthalpy.

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Which of the following in incorrect?

The cube of an even natural number is always even.

The root of a rational number `x/y` is `root3(x)/root3(y)`.

The cube root of a negative number is always pisitive.

2197 is a perfect cube.

Stability `H_(2)OgtH_(2)SgtH_(2)SegtH_(2)Te`

Bond enthalpy : `H_(2)OgtH_(2)SgtH_(2)SegtH_(2)Te`

Ka `H_(2)OgtH_(2)SgtH_(2)SegtH_(2)Te`

B.P : `H_(2)SltH_(2)SeltH_(2)TeltH_(2)O`

Cement containing no iron is white.

Cement containing excess amount of lime cracks during setting.

Setting of cement is and endothermic process.

Setting of cement is an example of hydration.