Task Unit 2 Senior One
This Quiz is made by : Mr: Ayman Ali
- 1.ANSWER THE FOLLOWING QUESTIONS : 1-what is meant by : a- Chemical Equation b-ionic Equation
- 2.Solve the following equation in form of ions : H2SO4 (Aq) + 2NaOH(Aq) ------ Na2SO4(aq) + 2H2O(l)
- 3.How much molecules , atoms , ions in water H2O
- 4.Calculate the mass of 0.2 mol of H2O. H=1 , O=16
- 5.
- the mass percentage of Fe and O in iron III oxide. [Fe = 56 , O = 16 ]
- 6.Symbol (S) represents the cpd in ..............................state
- A.
Liquid
- B.
Solid
- C.
Vapour
- 7.Give reason : chemical equation must be balanced
- A.
To acheive law of force
- B.
To acheive law of mass conservation
- C.
To acheive law of nuclear energy
- 8.Dimensions of atoms , molecules or ions are measured in ……………………………
- A.
Nanometer
- B.
Meter
- C.
Milimeter
- 9.The arrow in chemical equation is indicates …….
- A.
Reactants
- B.
Products
- C.
Conditions
- 10.Mg + O2 ---- MgO choose the suitable balance for this equation
- A.
2-1-2
- B.
1-1-2
- C.
2-3-2
- 11.The dissolution of all elements compounds in form of ions is .............................
- A.
Neutralization process
- B.
Dissolving process
- C.
Precipitation process
- 12.Its dissolving of all elements Except one of the products in precipitate is .....................
- A.
Neutralization process
- B.
Precpitate process
- C.
Dissolution process
- 13.Atomic mass unit is equal ....................
- A.
1.66 x 10
- B.
1.66 x 10-25 g
- C.
1.66 x 10-24 g
- 14.why We can't deal with limited atoms , molecules or ions
- A.
Due to their small masses and volumes
- B.
As we haven't rule for them
- 15.Building unit of ionic compound is ..................
- A.
Formula unit
- B.
Atom
- C.
Crystal lattice
- 16.Calculate the molar mass of NaHCO3 Na=23 , H=1 ,C=12 , O=16
- A.
32
- B.
84
- C.
108
- 17.Phosphourous contains ...............atom in its vapour state
- A.
8
- B.
1
- C.
4
- 18.Molar mass of hydrogen gas is ……………………
- A.
Mass of 6.02x1023molc
- B.
Mass of 12.04x1023 atoms
- C.
All
- 19.The number of moles of carbon dioxide which contain 8 g of oxygen is C=12 , O=16
- A.
0.5
- B.
0.25
- C.
0.4
- 20.The total no of ions present in 111 g of cacl2 is Ca=40 Cl=35.5
- A.
3
- B.
1
- C.
2
- 21.Volume at N.T.P of 0.22 g of CO2 is same as that of- H=1 , S=32 , O=16
- A.
(a) 0.01 g of hydrogen
- B.
320 mg of gaseous So2
- C.
All
- 22.Total number of atoms present 17 g of NH3 is N=14 , H=1
- A.
4 × 10-24 g
- B.
3 × 6. 02 ×1023
- C.
None
- 23.In the following reaction : 2Mg + O2 ------ 2MgO What is the limiting reactant ? if 16 g of oxygen is added to 48 g Mg Mg=24 , O=16
- A.
Limiting Reacatnt is oxygen
- B.
Limiting Reactant is Mg
- C.
None
- 24.Chemical analysis has proven that acetic acid is formed from 40 % of C , 6.67 % of H , and 53.33 % of O and its molar mass is 60g/mol . H=1 , O=16 , C=12What are the empirical ,d
- A.
CH2O
- B.
C2H2
- 25.The molecular formula of the pervious question is ..................
- A.
C2H2
- B.
CH4
- C.
C2H4O2
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