Subject :NSO Class : Class 8
Pranav, a class VII student collected some China rose petals and placed in a beaker. To this he added some warm water, kept it for some time and then he used this coloured water as an indicator. He collected few samples and tested them with China rose indicator. Which of his observations was/were not correct?
Sample Effect on adding China rose indicator
(i) Soap solution Turns green
(ii) Curd No change
(iii) Soft drink Turns dark pink
(iv) Antacid tablet Turns green
A(i) and (ii)
B(ii) only
C(ii), (iii) and (iv)
D(i) and (iii)
this question's answer according to the sofolympiad trainer website is option C. the answer given by the website is wrong, isn't it?
Ans 1:
Class : Class 10
Any link with Lopamudra Raut? :-)
Ans 2:
Class : Class 8
I think the answer which they told is wrong. The ans should be B.
Ans 3:
Class : Class 9
yes answer should be B
Ans 4:
Class : Class 8
B is correct antacids are basic since they are made for curing stomah acidity so it will turn the indicator to green.
Ans 5:
Class : Class 7
Answer should be b
Ans 6:
Class : Class 8
It should be b
Ans 7:
Class : Class 8
The correct option is B.Because curd is acidic and the indicator should have changed to dark pink color.
Ans 8:
Class : Class 9
it should be B as antacids are basic, and they will turn china rose to green