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Year 10 Chemistry C. A. T - II

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41 views2 pages

Year 10 Chemistry C. A. T - II

Uploaded by

zainab zein
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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YEAR 10 CHEMISTRY C .A.T.

II

Answer ALL Questions.

Name…………………………………………………………………………………
Class……………………………………………….Adm.No………………………………………….

Q 1.State the number of atoms and elements in KMnO4 (2)

Q 2Work out the Molar mass of the compound KMnO4 (2)

Q 3 Find the percentage of potassium in the compound KMnO4 (2)

Q 4 How many moles of KMnO4 are in 1.58 g of KMnO4 (2)

Q .5 What mass of Na2SO4 is present in 1.5 moles of Na2SO4 (2)

Q.6 How many moles of hydrogen chloride gas is present in 56 dm3 volume of the gas ?

[ Molar volume of any gas at room temperature and pressure = 24 dm3 ]

Q .7 What is the concentration in mol. dm-3 of a solution containing 0.25 moles in 200 cm3 NaOH
solution (2)

Q .8. A hydrocarbon contains 75% carbon and 25% Hydrogen . work out its empirical formula

(2)

Q .9 Hydrated calcium sulfate CaSO4 .YH2O, on heating yielded 3.42 g of anhydrous CaSO4 and
0.900 g of H2O . Find the value of y.
(2)

Q . 10.Determine the concentration in mol.dm-3 of sulfuric acid , if 25 cm3 of sulfuric acid reacts
with 20 cm3 0f 0.5 mol. dm-3 of

NaOH solution .

2 NaOH + H2SO4 Na2SO4 + 2H2O

[ K =39 ,Mn = 55 , O = 16 , Ca = 40 , S =32 , C = 12 , H = 1.0 , Na =23 ]


(2)

Q .7

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