Question

Match List - I with List - II : List - I (a) Be (b) Mg (c) Ca (d) Ra List - II (i) treatment of cancer (ii) extraction of metals (iii) incendiary bombs and signals (iv) windows of X-ray tubes (v) bearings for motor engines. Choose the most appropriate answer from the option given below :

• A. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
• B. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(v)
• C. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
• D. (a)-(iii), (b)-(iv), (c)-(v), (d)-(ii)

Hint:

{s-Block Applications:} Beryllium is unique; its low atomic number and low absorption cross-section for X-rays make it the "window" of choice for X-ray tubes. Magnesium's high reactivity and bright light make it the go-to for pyrotechnics and flares.

Answer 1

The Correct Option is A

Step 1: Beryllium (a) is used for windows of X-ray tubes (iv) because it is transparent to X-rays.
Step 2: Magnesium (b) is used in incendiary bombs and signals (iii) due to its bright white flame.
Step 3: Calcium (c) is used in the extraction of metals (ii) (like Uranium) from their oxides.
Step 4: Radium (d) is used in radiotherapy for the treatment of cancer (i).