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After the formation of blood clot, the c...

After the formation of blood clot, the clear colourless or yellowish fluid that remains on top is

A

fibrinogen

B

blood plasma

C

pus

D

blood serum

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Blood Clot Formation**: When a blood vessel is injured, the body initiates a process called coagulation, which leads to the formation of a blood clot. This process involves several components, including platelets and clotting factors. 2. **Components of Blood**: Blood consists of various components, including red blood cells, white blood cells, platelets, and plasma. Plasma is the liquid portion of blood that contains water, electrolytes, proteins, hormones, and waste products. 3. **Formation of Blood Serum**: After a blood clot forms, the solid components (like fibrin, which is formed from fibrinogen, and platelets) settle at the bottom, while the liquid portion rises to the top. This liquid is known as blood serum. 4. **Characteristics of Blood Serum**: Blood serum is a clear, colorless, or slightly yellowish fluid. It is essentially blood plasma without the clotting factors (like fibrinogen and prothrombin) that were used in the clotting process. 5. **Conclusion**: Therefore, after the formation of a blood clot, the clear, colorless, or yellowish fluid that remains on top is called **blood serum**. **Final Answer**: The clear colorless or yellowish fluid that remains on top after the formation of a blood clot is **blood serum**. ---
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In permanganate titrations, potassium pemanganats is used an an oxidizing agent in acidic medium. The medium is maintained acidic by the use of dilute sulphuric acid. Potassium permanganate acts as self indicator . The potential equation, when potassium permanganate acts as an oxidizing agent is 2KMnO_(4) + 3H_(2)SO_(4) to K_(2)SO_(4) + 2MnSO_(4) + 3H_(2)O + 5[O] or MnO_(4)^(-) + 8H^(+) + 5e^(-) to Mn^(2+) + 4H_(2)O Before the end point, the solution remains colourless but after teh equivalence point only one extra drop of KMnO_(4) solution imparts pink colour , i.e. appearance of pink colour indicates end point. These titrations are used for estimation of ferrous salts, oxalic acid, oxalates, hydrogen peroxide, As_(2)O_(3) etc. For decolourization of 1 mol of KMnO_(4) , the number of moles of H_(2)O_(2) required is

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