Which of the following is the best scientific method to test the presence of water in a liquid?

  • A
    Taste
  • B
    Smell
  • C
    Use of litmus paper
  • D
    Use of anhydrous copper sulphate

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The reason for the exceptionally high boiling point of water is -

Identify the incorrect statement regarding heavy water $(D_2O)$.

What causes the temporary and permanent hardness of water?

The freezing point of heavy water at $1 \ atm$ pressure is: (in $^{\circ}C$)

The decreasing order of hydrogen bonding in the following forms of water is correctly represented by:
$A.$ Liquid water
$B.$ Ice
$C.$ Impure water

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