JEE Advanced : Hydrogen & s-block elements

Chemistry Level 3

Which of the following statements are true?

  1. The solubility of hydroxides and carbonates of group 1 elements increases down the group.

  2. The melting point, boiling point and dielectric constant of heavy water is greater than regular water.

  3. There are 2 pi bonds and 1 sigma bond between the 2 carbon atoms in calcium carbide.

  4. Hydrogen peroxide can be obtained on heating water under extreme conditions (high temperature and pressure).

  5. The stability of carbonates, oxides and sulphates of group 2 elements increases down the group.

Source : NCERT.

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