Among the following sparingly soluble salts are

Explanation of solution: The correct option is A, which includes AgCl (Silver chloride), BaSO4 (Barium sulfate), and PbI2 (Lead iodide). These salts are considered sparingly soluble because their Ksp values are very low, meaning they don't dissolve much in water. The lower the Ksp, the less soluble the salt is.

For example:

• AgCl (Silver chloride) has a low Ksp, so it dissolves only slightly in water.
• BaSO4 (Barium sulfate) is also sparingly soluble with a very low Ksp.
• PbI2 (Lead iodide), though more soluble than AgCl and BaSO4, is still considered sparingly soluble because of its low Ksp.

Additionally, 100 cm is equal to 1 meter, which is a simple conversion used in various contexts, including solving problems involving concentration or volume.