Science, asked by sneha9864, 1 year ago

AGRAN PUBLIC SCHOOL
ACADEMICSON
SOUDAVOMEWORK COSE
CLASS SUBIENST
8 8 8
8
8 8 8 8
ne beats by
does not
axborot
Consider the following
b
Xariam de
a con
identify andy
med
i)
04.
Name the type of reaction
State the reason for the following
Sensil moun d
Part soupled on rot ar
s added u wat during
To
trays of water
05.
Tron corrodes but numit does not
Metal X acquires green colour coating on its suice on exposure to
(8) fdentify de metal
(AD
and name the process involved
Name and write chemical forumlar of the preen coating formed
06. Define tancidity What kind of subsunces are added to prevent rancidity: What is the
methods to prevent rancidity?
07. A white salt of lead on heating decomposes to give brown lumes and residue is lantbed
(0 Name the salt
(it) Write the equation for decomposition reaction
Why do we store silver chloride in dark colour bottles
O Define the following:
(D Exothermic reactions Redox reactions
(w) Corrosion
v) double displacement reacti.
010. Why does colour of copper sulphate solution changes when won nail e d w
8 8 88
On
Chapter
pH of soil is A is 7.5 while that of B is 4.5. Which of the two soil Ao B should be
treated with powdered chalk to adjust its pH & why?
Explain how antacid works.
State reasons for following statements:
(i) Ammonia is a base but does not have hydroxyl group
Tap water conducts electricity but distilled water does not
(in Dry hydrogen chloride gas does not turn blue limus to red whereas
hydrochloric acid does.
What is universal indicator?
Write the name given to bases that are highly solable in water. Give an example
How is tooth decay related to pH? How is it to be prevented
( Why does bee sting causes pain and irritation Robbing of baking soon the
sting area gives relief. How?
Explain why hydrochloric acid is a strong acid and acetic acid a weak acid? How cm
Vestido
04.
%
06.​

Answers

Answered by pAvIKTm46
0

Answer:

i can't understand

what is it

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