Question

1.what change will you observe in the colour of red litmus paper when it is dipped in the solution of sodium sulphate give reason to explain your observation
2.a bottle filled up to the brim with concentrated sulphuric acid is Left Open in the atmosphere by mistake will there be any change in the level of liquid explain your answer with analysis
best answer will be marked as brainliest

Answer 1

1)When red litmus paper is dipped into Na2(SO4 )2there WILL NOT be any colour change because sodium sulphate is formed by a strong acid(h2so4) and strong base (naoh) so it is a neutral salt

2) when conc h2so4 is left open then it absorbs moist and o2 as it is HYGROSCOPIC ( moist absorbing) in nature which making it more dilute and resultantly making it to overflow..

Answer 2

Its colour remains same. Sodium sulphate (Na2SO4) salt is derived from strong acid and strong base so it is neutral salt, its salt solution has no effect on red litmus paper.

Concentrated sulfuric acid is highly hygoscopic, absorbing air moisture quickly. Moisture is matter, and matter occupies space. Since the bottle is already full, as you state, the excess matter has no space inside the bottle, and the acid overflows.