Question

ASSESSMENT TOOL (Term 14t) FOR CLASS 7TH
Subject : Science
Total No. of Questions : 17
M. Marks : 30
Q.1 to Q.10 carry two marks each, Q.11 carry 4 marks & Q.12 & Q.13 carry 3 marks each.
Q. 1:Four test-tubes A, B, C & D containing milk of magnesia, baking powder, vinegar &
water respectively. What change is expected when red & blue litmus paper is immersed in
these test tubes?
Colour change in red litmus Colour change in blue litmus
Test-Tube Solution
paper
paper
А
Milk of magnesia
B
Baking powder
C
Vinegar
D
Water
Q:2:- Why does ant sting cause burning sensation?
Ans: The irritation of the skin due to ant bite is can
acid that the
Joinic​

Answer 1

for first question it's 'C'

Explanation:

as vinigar is a acide and when it changes from red to blue colour