9.23 Rahul took some crystals of copper sulphate in a dry test tube an

1.	9.23 Rahul took some crystals of copper sulphate in a dry test tube and heatedthem for sometime. There was a change in appearance of the salt. Rahul put somewater on the solid. The solid regained its original appearance. Can you explainthese observations ? What was the colour of the original substance ?
Answer» Heating the CuSO4.5H2O crystals causes then to loose the water of crystallisation that is the 5H2O part. It becomes anhydrous copper sulphate. Its colour changes to white from blue. CuSO4.5H2O →CuSO4 +5H20 Further heating the anhydrous copper sulphate may cause it to undergo decomposition and form a black substance which is copper(II) oxide along with it oxygen and sulphur dioxide gases are also formed. 2CuSO4→2CuO + O2 +2SO2

9.23 Rahul took some crystals of copper sulphate in a dry test tube and heatedthem for sometime. There was a change in appearance of the salt. Rahul put somewater on the solid. The solid regained its original appearance. Can you explainthese observations ? What was the colour of the original substance ?

Answer»

Heating the CuSO4.5H2O crystals causes then to loose the water of crystallisation that is the 5H2O part. It becomes anhydrous copper sulphate. Its colour changes to white from blue.

CuSO4.5H2O →CuSO4 +5H20

Further heating the anhydrous copper sulphate may cause it to undergo decomposition and form a black substance which is copper(II) oxide along with it oxygen and sulphur dioxide gases are also formed.

2CuSO4→2CuO + O2 +2SO2

Discussion

No Comment Found

Related InterviewSolutions

Hence, the bisectors of a linear pair are at right aintersedt at O. If 4X0L 4LOP b,find the value of5 In the given figure lines XY and LMIt is given that a:b 23.
What is particulate matter ? How it leads to global warming ?
Bile juice can emulsify fats because it contains(1) Cholesterol(3) Bile pigments(2) Bile salts(4) Enzymes
Mr. Kumar is suffering from high blood cholesterol. Name a beneficial microbe thatcan be used to treat his condition.B.
12. Find out the name of the microbes from which Cyclosporin A (animmunosuppressive drug) and Statins (blood cholesterol loweringagents) are obtained.
List the medicinal importance of honey.
G) A high-level language is also known aslike language.
1. A young green plant receives sunlight fromone direction only. What will happen to itsshoots and rootst2. Write any two applications of bio-gas.
Material of Nucleus is stained by
(a) 4, 8, 12, 16 (b) 12. 16, 20, 24(c) 10, 12, 14, 16 (d) 2, 4, 6. 8

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment