At the triple point, the substance co-exists in 1. Liquid phase 2. Solid phase 3. Vapour phase Select the correct answer using the code given below:

CAPF AC 2020 PYQ with Answer — At the triple point, the substance co-exists in 1. Liquid phase 2. So…

2020 · Q21

At the triple point, the substance co-exists in

1Liquid phase
2Solid phase
3Vapour phase

Select the correct answer using the code given below:

general-sciencechemistry

A1 only
B1 and 2 only
C2 and 3 only
D1,2 and 3

Explanation

The triple point is the unique temperature and pressure at which the solid, liquid and vapour phases of a substance coexist in equilibrium — for water, 273.16 K and 611.657 Pa. All three phases are simultaneously present, so statements 1, 2 and 3 are all correct.