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Worksheetschemistry form 4
Total questions: 25
Worksheet time: 13mins
Diagram shows the apparatus set-up to determine the empirical formula for an oxide of copper. Gas Z is used to reduce the oxide of copper. What is gas Z?
Rajah menunjukkan susunan radas untuk menentukan formula empirik bagi satu oksida kuprum. Gas Z digunakan untuk menurunkan oksida kuprum itu. Apakah gas Z?
Oxygen / Oksigen
Chlorine / Klorin
Hydrogen / Hidrogen
Carbon dioxide / Karban dioksida
Which substance has the same number of atoms as 12 g of carbon-12?
Bahan manakah yang mempunyai bilangan atom yang sama dengan 12 g carbon-12?
1 mole of sodium chloride, NaCl
1 mol natrium klorida, NaCl
1 mole of ethanol, C2H5OH
1 mol etanol, C2H5OH
1 mole of chlorine gas, Cl2
1 mol gas klorin, Cl2
1 mole of neon, Ne
1 mol neon, Ne
In the experiment, excess chlorine gas is flown into the combustion tube. A brown solid is produced. What is the mass of the brown solid produced? [Relative atomic mass: Cl = 35.5, Fe = 56]
Dalam eksperimen ini,gas klorin berlebihan dialirkan ke dalam tiub pembakaran. Pepejal perang terbentuk. Apakah jisim pepejal perang yang terbentuk?
6.09 g
6.86 g
9.53 g
12.19 g
A sample of carbon dioxide has a mass of 88 g. The relative molecular mass of the gas is 44. Which statements are correct about the sample of carbon dioxide?
Suatu sampel karbon dioksida mempunyai jisim 88 g. Jisim
molekul relatif bagi bagi gas ialah 44. Antara pernyataan berikut, yang manakah benar mengenai sampel karbon dioksida tersebut?
It contains 2 moles of carbon dioxide molecules
Mengandungi 2 mol molekul karbon dioksida
It contains 2 moles of carbon atoms
Mengandungi 2 mol atom karbon
It contains 2 moles of oxygen atoms
Mengandungi 2 mol atom oksigen
It contains 2 x 6 x 1023 carbon dioxide molecules
Mengandungi 2 x 6 x 1023 molekul karbon dioksida
The formula for Silver [I] chloride is:
AgCl
SiCl
AgCl2
AgCl2
The term used for substances which are formed as a result of chemical reaction
Reactants
Catalyst
Products
Precipitate
Which out of these will form an anion?
Ammonium
Chlorine
Nickel
Iron
Which of the following are chemicals that can be easily found at home?
I . Sodium Chloride
II. Glucose
III. Potassium hydroxide
IV. Hydrochloric acid
I and II
I and III
II and III
III and IV
Who discovered neutrons ?
Neils Bohr
James Chadwick
J.J Thompson
Ernest Rutherford
A patient is diagnosed with a damage in the thyroid gland. Which isotope is used to treat the patient?
Copper-64
Cobalt-60
Carbon-14
Iodine-131
What is the chemical formula of sodium sulfate?
SSO4
SoSO4
NaSO4
Na2SO4
What is the name of this chemical, H2SO4?
Hydrogen sulfate
Sulfuric acid
Sulfate
Sulfate hydrogen
What is the formula of Copper (II) oxide?
CUO
CuO
CuO2
Cu2O
What is the formula of nitric acid?
H2SO4
HNO3
HCl
hno3
How many atoms are there in the compound MgCO3?
3
4
5
6
How many total atoms are in FeO2
3
2
1
C6H12O6
Alanine is an amino acid with formula C3H7NO2. How many atoms in all are in each molecule of alanine?
3
7
12
13
Which of the following chemical formulas contains exactly 4 hydrogen atoms?
CH3COONa
NH4OH
CH3CH2Cl
CH3CHO
How many total atoms are in 2C2HO8Cl2
23
46
3
22
2C2H2 + 5O2 --> 4CO2 + 2H2O
How many total atoms are on the reactant side of the following equation: CH4 + 2O2 -> CO2 + 2H2O
9
7
3
4
