Which of the following statements about hydrogen is incorrect?

Tritium nucleus contains _____________

The hardness of water can be determined by volumetrically using the reagent _____________

Zeolite used to soften hardness of water is hydrated _____________

For decolorisation of 1 mole of acidified KMnO₄, the moles of H₂O₂ required is ___________

Explain why hydrogen is not placed with the halogen in the periodic table.

Predict which of the following hydrides is a gas on a solid
(a) BCI
(b) NaH 
Give your reason.

Why interstitial hydrides have a lower density than the parent metal.

Hydrogen peroxide can function as an oxidising agent as well as reducing agent. substantiate this statement with suitable examples.

Explain the exchange reactions of deuterium.

Arrange NH₃, H₂O and HF in the order of increasing magnitude of hydrogen bonding and explain the basis for your arrangement.

Justify the position of hydrogen in the periodic table?

An isotope of hydrogen (A) reacts with diatomic molecule of element which occupies group number 16 and period number 2 to give compound (B) is used as a moderator in nuclear reaction. (A) adds on to a compound ( C), which has the molecular formula C₃H₆ to give (D). Identify A, B, C and D.