Question

10) write fullform of PHand Importance
of PH in daily life? Give reason why
dooe tooth decay Start when PHof mouth
id lower than 5.5.​

Answer 1

Answer:

Bacteria in the mouth create acids after eating through the oxidation of sugar and food particles in the mouth. Tooth decay starts when the mouth's pH is below 5.5. In addition to food particles, masses of bacterial cells bind to the teeth to form dental plaque.

Answer 2

Answer:

Which of the following graphs is/are correct for a fixed amount of an ideal gas at fixed pressure, where V is volume and T is absolute temperature of the gasA container is divided into two parts in the volume ratio 1:4, by a fixed semipermeable membrane (SPM), which allow only free movement of ‘A’ gas across it. At 300K, smaller part contains only A3A3 gas at 90 mm HgHg and larger part contains negligible but sufficient amount of liquid water to achieve equilibrium with vapours, at any temperature. Now, the container is heated and maintained at 330 K, at which 50% of A3(g)A3(g) dissociated into A(g)A(g). The vapour pressure of water at 300 K and 330 K are 35 and 49.5 mm HgHg, respectively. Which of the following is/are correct