JEE Main 18 March 2021 Shift 2 Solved Paper

(A) Metallic beryllium is used for making windows of X-ray tubes.
(B) When Mg combined with water while burning it releases gas and oxygen. Magnesium is used in either powdered or solid form as an incendiary agent for both illumination and antipersonnel purposes.
(C) Pure calcium metal is used as a reducing agent in the extraction of other types of metal, such as thorium, uranium and zirconium.
(D) Due to its radioactive nature Ra is used in the treatment of cancer.
Hence, correct match is (A-4), (B-3), (C-2), (D-1).