KROW12DGE
1) on the map show 200 km on the ground then 25 cm on the map
km one ground
edges
B) Penmeter of square
4) A base of cohe has
5) 6.030 kg
6) The sum of the length of all sides of any close figure is called its
0.7) Answer the following
(1x22 Marla)
a) Write using decimal. Twenty one point zero three two
b) What is least number of sides in polygon?
0.8) f one Won(Currency of South Korea) = Rs.065 then find the value of 250 Wan
in Indian Rupees
UNDERSTANDING
29) Write decimal name of 95 4068
10) Write as decimal 39/1000
SA
11) Find area and perimeter of Rectangle with length = 35 cm and breadth = 42 cm
[1x2 Marks)
Answers
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Answer:
Perfect answr solved .by me.
So nice questions.
Question:
Which one of the following household substances found in the house will form a precipitate with an aqueous solution of barium chloride: baking soda, household ammonia, table salt, epsom salt, bleach.
Chemistry in Everyday Life:
Almost everything around us is a chemical substance and is made up of elements and compounds. A lot of household substances found in the house, such as baking soda, household ammonia, table salt, Epsom salt, bleach are chemical substances.
Answer and Explanation:
Baking soda, household ammonia, Epsom salt, and bleach will form a precipitate with an aqueous solution of barium chloride.
The chemical formula of baking soda is NaHCO
3
that reacts with barium chloride to form barium carbonate precipitate(as one of the products) as it is insoluble in water.
The chemical formula of the household ammonia is NH
3
that reacts with barium chloride to form nitrogen trichloride precipitate(as one of the products) as it is insoluble in water.
The chemical formula of Epsom salt is MgSO
4
that reacts with barium chloride to form barium sulfate precipitate(as one of the products) as it is insoluble in water.
The chemical formula of bleach is CaOCl that reacts with barium chloride to form barium chlorate precipitate(as one of the products) as it is insoluble in water.
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