Who is the scientist known for classifying the plant kingdom into two main groups?

Which of the following is monoatomic?

Why is Wurtz reaction not preferred for the preparation of alkanes containing an odd number of carbon atoms? Illustrate your answer by taking one example.

Identify phenacetin from the following.

An electrically charged particle enters a uniform magnetic field in a direction perpendicular to the field with a velocity $v$. Then,it travels

Which of the following contains both ionic and covalent bonds?