What is chemical oxygen demand?

600

---

What is colorimetry?

660

---

How is temporary hardness be removed?

623

---

What is the limitation of cod?

617

---

How is hardness of water caused?

652

---

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

603

---

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

581

---

Why is ph increases suddenly after the equivalence point?

595

---

What is photoelectric colorimeter?

635

---

Why is ammonia solution added while preparing edta solution?

856

---

What is the unit of conductance?

627

---

What is the composition of ferroin?

646

---

What is edta?

616

---

How is measurement of ph made?

588

---

What is blank solution?

629

---