Question

1. What is hypermetropia or farsightedness? How is hypermetropia corrected? Explain with diagram.

2. If the solution of K2CrO4 (potassium chromate) is mixed with barium sulphate solution (BaSO4) ,……
a) What is the colour of precipitate formed?
b) Name the precipitate.
c) What is the type of chemical reaction? Define it.
d) Write the balanced chemical equation. ​

Answer 1

Answer:

1]Far-sightedness, also known as long-sightedness, hypermetropia, or hyperopia, is a condition of the eye where distant objects are seen clearly but near objects appear blurred. This blurred effect is due to incoming light being focused behind, instead of on, the retina wall due to insufficient accommodation by the lens. Hypermetropia can be corrected using optical correction, vision therapy, medical therapy, and refractive surgery.

2]K2CrO4 + BaSo4 ----------> BaCrO4 (Precipitate) + K2SO4

Potassium Barium Barium Potassium

Chromate Sulphate Chromate Sulphate

It Is A Double Displacement Reaction

3]

Explanation: