[amp_mcq option1=”Sodium chloride” option2=”Urea” option3=”Cane-sugar” option4=”Blood” correct=”option4″]
The correct answer is D. Blood.
A colloid is a mixture in which one substance of microscopically dispersed insoluble particles is suspended throughout another substance. The particles are too small to be seen with the naked eye, but they are large enough to scatter light.
Sodium chloride (NaCl), also known as table salt, is an ionic compound that is not a colloid. It is a solid at room temperature and does not form a suspension in water.
Urea (CO(NH2)2) is an organic compound that is also not a colloid. It is a white solid at room temperature and does not form a suspension in water.
Cane sugar (C12H22O11) is a carbohydrate that is also not a colloid. It is a white solid at room temperature and does not form a suspension in water.
Blood is a complex mixture of plasma, red blood cells, white blood cells, and platelets. It is a colloid because the plasma contains proteins that are too small to be seen with the naked eye, but they are large enough to scatter light.
The following are some examples of other natural colloids:
- Milk
- Mud
- Fog
- Smoke
- Mayonnaise