What is chemical oxygen demand?

594

---

What is colorimetry?

660

---

How is temporary hardness be removed?

617

---

What is the limitation of cod?

612

---

How is hardness of water caused?

645

---

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

598

---

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

574

---

Why is ph increases suddenly after the equivalence point?

593

---

What is photoelectric colorimeter?

635

---

Why is ammonia solution added while preparing edta solution?

850

---

What is the unit of conductance?

622

---

What is the composition of ferroin?

638

---

What is edta?

614

---

How is measurement of ph made?

585

---

What is blank solution?

627

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