A drug becomes ineffective when it decomposes to 50 % of its concentration. If 16 mg of said drug becomes 4 mg in 12 months

Question

Statement- 1: On mixing NaCl in ice, it will not melt at 0°C.

Statement- 2: On mixing NaCl freezing point of ice decreases.

(1) Statement 1 and statement 2, both are correct.

(2) Statement 1 is correct and statement 2 is incorrect.

(3) Statement 1 is incorrect and statement 2 is correct.

(4) Statement 1 and statement 2, both are incorrect.

Answer 1

Correct option is: (3) Statement 1 is incorrect and statement 2 is correct.

On mixing NaCl in ice, its freezing point decreases and it will melt below 0° C