Chemistry

Solutions and pH Chemistry

400 Questions

Solutions and pH chemistry focus on the acidity or alkalinity of various substances, from human urine to acidic soils. Questions involve titration calculations, molarity determination, and understanding mole fractions. This topic is a staple in the chemistry sections of state and national level competitive exams.

Calculating solution molarityMole fraction calculationpH value interpretationAcidic soils and pHTitration and neutralization

Solutions and pH Chemistry Questions

Multiple choice reactions of acids and bases properties of acids and bases acids, bases and salts acids and bases chemistry

When $KHSO _{4}$ is added to concentrated solution of $H _{2}SO _{4}$, the acidity of the solution ?

  1. Increases

  2. Decreases

  3. Remains constant

  4. Can't be predicted
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When $KHSO _4$ is added to concentrated $H _2SO _4$, the acidity remains constant.

Because $H _2SO _4$ is highly concentrated, it's acidity won't increase by adding $KHSO _4$ .

Multiple choice reactions of acids and bases properties of acids and bases acids, bases and salts acids and bases chemistry

In which case of mixing a strong acid and a base each of $1$N concentration, temperature rise is highest?

  1. $20$ ml, acid + $30$ ml alkali
  2. $10$ ml, acid + $40$ ml alkali
  3. $20$ ml, acid + $20$ ml alkali
  4. $30$ ml, acid + $20$ ml alkali
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

More amount of acid reacts with equal amount of base, higher the amount of heat releases.

So, $20ml$ of acid+$20ml$ of alkali.

Multiple choice reactions of haloarenes haloalkanes and haloarenes chemistry

In the depression of freezing point experiment, it is found that
(i) The vapour pressure of the solution is less than that of pure solvent
(ii) The vapour pressure of the solution is more than that of pure solvent
(iii) Only solute molecules solidify at the freezing point
(iv) Only solvent molecules solidify at the freezing point

  1. I,II

  2. II,III

  3. I,IV

  4. I,II,III
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In the depression of freezing point, the vapor pressure of the solution is lower than that of the pure solvent (Raoult's Law). At the freezing point, only the solvent molecules solidify, leaving the solute in the remaining liquid.