Multiple choice

A substance which changes readily into vapour without heating is called _____.

  1. Efflorescent

  2. Synthetic

  3. Volatile

  4. Effervescent

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A substance which changes readily into vapour without heating is called volatile (option C). Volatile substances have high vapor pressure at room temperature and evaporate easily. Efflorescent substances lose water of crystallization, effervescent substances release gas bubbles, and synthetic refers to artificially made materials.