Write the structural formula for edta.

624

---

Why is glass electrode called an ion selective electrode?

547

---

Why is starch indicator added towards the end point?

583

---

What is chemical oxygen demand?

590

---

What is colorimetry?

653

---

How is temporary hardness be removed?

610

---

What is the limitation of cod?

603

---

How is hardness of water caused?

638

---

What is the bluish white precipitate formed after adding ammonia solution?

588

---

Which is the indicator used in the determination of cao I cement solution?

567

---

Why is ph increases suddenly after the equivalence point?

585

---

What is photoelectric colorimeter?

626

---

Why is ammonia solution added while preparing edta solution?

841

---

What is the unit of conductance?

615

---

What is the composition of ferroin?

627

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