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Subject :NSO    Class : Class 7

Following sets of test tubes were made by a class VII science teacher.


She asked the students to find the incorrect statements about the given experimental set-ups.

ABlue litmus solution turns red in test tubes 1 and 3.
BTurmeric solution turns red in test tube 1.
CChina rose indicator turns dark pink in test tubes 2 and 4.
DPhenolphthalein remains colourless in test tubes 2 and 4.


is window cleaner an acid?

Ans 1:

Class : Class 4
ans is supposed to be c

Ans 2:

Class : Class 7
D

Ans 3:

Class : Class 9
HEy i do not know why but in the solution it is written that window cleaner is a aid.. This is wrong , as Window cleaner is ammonium hydroxide , which is a base.

Ans 4:

Class : Class 8
D

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