What do you observe when:(a) Blue vitriol is heated ?(b) Washing soda

1.	What do you observe when:(a) Blue vitriol is heated ?(b) Washing soda is exposed to air ?(c) Blue litmus solution is added to water ?
Answer» (a) Blue vitriol is blue in color as it contains 5 molecules of water of crystallization (CuSO₄H₂O). When it is heated, it loses water of crystallization and becomes anhydrous CuSO₄ which is grey-white in color. (b) Washing soda (Na₂CO₃.10H₂O) is a white crystalline substance and on exposure to air it gets changed the o white powder. (c) Pure water is neutral to litmus which means that no change in the colour of blue or red litmus solution is observed when 1 treated with water.

What do you observe when:(a) Blue vitriol is heated ?(b) Washing soda is exposed to air ?(c) Blue litmus solution is added to water ?

Answer»

(a) Blue vitriol is blue in color as it contains 5 molecules of water of crystallization (CuSO₄H₂O). When it is heated, it loses water of crystallization and becomes anhydrous CuSO₄ which is grey-white in color.

(b) Washing soda (Na₂CO₃.10H₂O) is a white crystalline substance and on exposure to air it gets changed the o white powder.

(c) Pure water is neutral to litmus which means that no change in the colour of blue or red litmus solution is observed when 1 treated with water.

Discussion

No Comment Found

Related InterviewSolutions

Density of water is less than 1g/c.c ______A. at `4^(@)C`B. above `4^(@)C`C. below `4^(@)C`D. Both (2) and (3)
Identify the set of pure and impure water among the followingA. Rain water, sea waterB. Rain water, distilled waterC. Sea water, river waterD. River water, ground water
Chemical treatment of surface water can be carried out by the addition ofA. bleaching powerB. alumC. oxygenD. carbon dioxide
`{:(,"Column A",,,"Column B"),(A.,"Hard water","( )",a.,"Reverse osmosis"),(B.,"Soft water","( )",b.,"Rain water"),(C.,"Desalinated water","( )",c.,"Presence of "Ca^(+2)andMg^(2+)),(D.,"Lake water","( )",d.,"Scum formation"),(,,"( )",e.,"Lather formation"):}`
Arrange the following terms in sequence from source to supply. (a) Chlorination (b) Sedimentation (c ) Filtration (d) Storage water tank (e) LakesA. ecadbB. acbdeC. ebcadD. bcade
Name the followingA solid, ‘natural form of water.
Name the following A chemical used during chlorination of water.
Name the followingAn agricultural pollutant in water.
What are the methods of water conservation? Write about water management in briefly.
What is meant by water management?

What do you observe when:(a) Blue vitriol is heated ?(b) Washing soda is exposed to air ?(c) Blue litmus solution is added to water ?

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment