Answer Posted / rashika

It is composed of copper, zinc, lea and iron.
Copper - 68.5% - 71.5%
Lead - 0.7%
Iron - 0.5%
and remaining is zinc.

What is si unit of viscosity-coefficient?

1054

---

What is photoelectric colorimeter?

969

---

Why be is not soluble in liquid ammonia?

1036

---

State lambert’s law.

1142

---

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

924

---

What is the formula you will use to calculate how many millilitres of 5.5 m naoh are required to prepare 400 ml of 1.5m naoh?

953

---

Why is estimation of copper done at 620 nm wave length?

1375

---

What general group of organic compounds are not oxidesied in the cod test?

1449

---

How are pka and strength of a weak acid related?

972

---

What is phase transfer catalyst?

1043

---

What is the chemical formula of alum?

1057

---

What is the difference between volumetric solutions and test solutions

3111

---

what is difference b/w "regio selectivity" & "sterio selectivity"

2391

---

Why is acetone used for cleaning viscometer?

1300

---

what is the relation between Total organic carbon and Chemical Oxygen demand?

2850

---