Science MCQ Question
विज्ञान ऑनलाइन मॉक टेस्ट
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#1. Which of the following is the hardest natural substance on Earth?
Diamond is made of tightly bonded carbon atoms in a strong crystalline structure, making it the hardest naturally occurring material.
#2. Which of the following is the smallest particle of an element?
An atom is the smallest unit that retains an element’s properties.
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