Which of the following orders is correct $:-$

Give the composition of Portland cement.

State whether the following statements are True or False:
$(1)$ Plaster of Paris is used to join fractured bones and keep them immobilized.
$(2)$ Calcium carbonate and soil are the raw materials for cement production.

In India,green flames are observed during fireworks at weddings. Which of the following elements is responsible for this?

Explain how to obtain hydroxides of alkaline earth metal elements. Also,discuss the properties of these hydroxides.

$A$ hydrated colorless solid $(A)$ is water soluble and finds use in medicine as a purgative. When a solution of $(A)$ is treated with ammonium phosphate,a white precipitate is formed. $(A)$ gives a pink mass in the cobalt nitrate cavity test. What is $(A)$?