JEE Main 2016 · 3 Apr · Shift 1 · Chemistry Q43

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ChemistrySingle correct+4 / -1Question 43 of 90

Which one of the following statements about water is FALSE ?

Water is oxidized to oxygen during photosynthesis.

Water can act both as an acid and as a base.

There is extensive intramolecular hydrogen bonding in the condensed phase.

Ice formed by heavy water sinks in normal water.

Answer and worked solution

Official answer: C

Hydrogen bonding in water and ice is intermolecular, between neighbouring molecules, so (3) is false. Water is oxidised to $\ce{O2}$ in photosynthesis, it is amphoteric, and $\ce{D2O}$ ice (density about 1.02 g cm⁻³) sinks in ordinary water.

Topics:Water and hydrogen peroxide Hydrogen bonding

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JEE Main 2016 · 3 Apr · Shift 1, Chemistry question 43