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Pranav Kartik from DPS sushant lok , Gurgaon
Subject :NSO    Class : Class 7

Which of the following statements is/are incorrect?
I. Oxalic acid is used in the manufacture of washing soda.
II. Tartaric acid is a weak acid.
III. Potassium hydroxide is used for making liquid soaps.
IV. Antacids contain aluminium or magnesium hydroxides.
V. New substance formed as a result of reaction between an acidic substance and a basic substance is always a neutral salt.

AII and III only
BII and III only
CIV only
DI, II and III only


Option A and Option B are same

Ans 1:

Vedant Singh Chauhan from Somerville International School, Noida
Class : Class 8

Ans 2:

AHANA BAG from DELHI PUBLIC SCHOOL JOKA SOUTH KOLKATA, KOLKATA
Class : Class 9
Why it is showing wrong that tartaric acid is a weak acid? Is it not an organic acid so it must be weak acid.

Ans 3:

Ishaan Pal from Christ Academy, Bangalore
Class : Class 7
questionis wrong

Ans 4:

PRANAVA NS from BHARATIYA VIDYA BHAVAN VIKAS VIDYALAYA PONNANI NADAKKAVU , EDAPPAL
Class : Class 7

Ans 5:

Vaishnavi Sharma from Holy Angels ISC school , THIRUVANANTHAPURAM
Class : Class 8

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Shiven Sidharth from Delhi Public School Vasant Kunj, New Delhi
Subject :NSO    Class : Class 3

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Shruti from ,
Subject :NSO    Class : Class 3

Ans 1:

Vishwas kanani from Apollo international school , AHMEDABAD
Class : Class 4
YES MARCH HAS 31 DAYS

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Shruti from ,
Subject :NSO    Class : Class 3

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Trina from Ganges Valley School, Hyderabad
Subject :NSO    Class : Class 6

Ans 1:

Yaazhisai from DPS international school , Singapore
Class : Class 6
it is chemical change

Ans 2:

Yaazhisai from DPS international school , Singapore
Class : Class 6
AN ENTIRELY NEW SUBSTANCE IS FORMED (Ca(OH)2, HENCE CHEMICAL CHANGE.

Ans 3:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
Please explain!

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Shrihan Koley from Radiant International School , Patna
Subject :NSO    Class : Class 1

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AARUSH from ALLEN CAREER INSTITUTE, Mumbai
Subject :NSO    Class : Class 8

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Paarth Vashistha from Kunskapsskolan Gurgaon , Gurgaon
Subject :NSO    Class : Class 8

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Paarth Vashistha from Kunskapsskolan Gurgaon , Gurgaon
Subject :NSO    Class : Class 8

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Paarth Vashistha from Kunskapsskolan Gurgaon , Gurgaon
Subject :NSO    Class : Class 8

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