MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
Home
GCSE
Gcse Chemistry
Quantitative Chemistry
1
2
3
4
5
6
7
8
9
10
Q.1
Sometimes athletes take drugs to enhance their performance. One such drug is ephedrine which has the formula C H NO. What is the molecular mass of ephedrine?
0%
55 amu
0%
165 amu
0%
40 amu
0%
164 amu
Q.2
Amphetamine, another drug, has the formula C H N. The molecular mass is 135 amu. Calculate the percentage by mass of hydrogen in amphetamine.
0%
9.6%
0%
80%
0%
10.4%
0%
0.7%
Q.3
A substance used as a cosmetic by the Ancient Egyptians has been analysed. It was found to contain 76% lead, 13% chlorine, 2.2% carbon and 8.8% oxygen. Calculate the empirical formula of this compound.
0%
PbCl6 CO4
0%
Pb4Cl4C2O6
0%
PbClCO3
0%
Pb2Cl2CO3
Q.4
Some toothpastes contain sodium fluoride. This compound has the formula NaF. Calculate the relative formula mass of this compound.
0%
42 amu
0%
42
0%
30 amu
0%
20 amu
Q.5
Calculate the % by mass of fluorine in sodium fluoride.
0%
55%
0%
45%
0%
48%
0%
0.45%
Q.6
A tube of toothpaste contains 1.5 g of sodium fluoride. Calculate the mass of sodium in this tube of toothpaste.
0%
0.675 g
0%
0.825
0%
0.72 g
0%
0.825 g
Q.7
Calcium hypochlorite tablets are added to swimming pools to kill microorganisms. The formula of calcium hypochlorite is CaCl O . Calculate the relative formula mass of calcium hypochlorite.
0%
143 amu
0%
91.5 amu
0%
45 amu
0%
70 amu
Q.8
Calculate the percentage by mass of oxygen in calcium hyopchlorite.
0%
22%
0%
88%
0%
11%
0%
78%
Q.9
Calculate the mass of oxygen in a 50g tablet of calcium hypochlorite.
0%
39%
0%
5.5 g
0%
11 g
0%
44 g
Q.10
Car airbags inflate when an impact causes a mixture of chemicals to react. The mixture of chemicals contains sodium azide (NaN ) which undergoes thermal decomposition to produce sodium and nitrogen. Calculate the mass of sodium that would be produced when 170 g of sodium azide decomposes.
0%
109.8 g
0%
60.2 g
0%
105.6 g
0%
58.4 g
0 h : 0 m : 1 s
1
2
3
4
5
6
7
8
9
10
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page