Which of the following are also considered to be the states of matter?
(i) Plasma (ii) Platelets (iii) BEC (iv) BHC

Question

Accepted Answer

Option 3 is the correct answer because it includes (i) Plasma and (iii) BEC, both of which are recognized states of matter.

1. **Explanation for Option 3:**
   - **Plasma (i):** Plasma is considered the fourth state of matter, distinct from solids, liquids, and gases. It consists of a hot, ionized gas with equal numbers of positive ions and electrons. Plasma is found naturally in stars, including the sun, and is used in various technologies such as fluorescent lights and plasma TVs.
   - **BEC (iii):** BEC stands for Bose-Einstein Condensate, which is a state of matter formed at temperatures close to absolute zero. At this extremely low temperature, a group of atoms is cooled to near absolute zero, causing them to occupy the same space and quantum state, essentially behaving as a single quantum entity. This state was first predicted by Satyendra Nath Bose and Albert Einstein.

2. **Explanation for why other options are incorrect:**
   - **Option 1 (i) and (ii):** While plasma (i) is a state of matter, platelets (ii) are not. Platelets are small blood cells that help with clotting in the human body and are not related to states of matter.
   - **Option 2 (iii) and (iv):** BEC (iii) is a state of matter, but BHC (iv) is not recognized as a state of matter. BHC does not correspond to any known state of matter in scientific literature.
   - **Option 4 (ii) and (iii):** Platelets (ii) are not a state of matter, as explained earlier. Although BEC (iii) is a state of matter, the inclusion of platelets makes this option incorrect.

In conclusion, Option 3 is the only choice that correctly identifies two recognized states of matter: plasma and Bose-Einstein Condensate.