WorksheetsChemistry ulangkaji
Total questions: 60
Worksheet time: 2hrs 7mins
What could be the salt shown in the diagram?
Sodium carbonate
Copper (II) sulphate
Iron (II) sulphate
Iron (III) nitrate
_______ is an isotope used to detect leakage in underground gas or oil pipelines.
Sodium-24
Cobalt-60
Carbon-14
Iodine-131
Which of the following is FALSE about isotopes?
Same nucleon number
Same proton number
Different number of neutrons
Different number of electrons
A scientist made the following contributions in the development of the Periodic Table.
Johan W. Dobereiner
John Newlands
Lothar Meyer
Dmitri Mendeleev
Element M is placed in Group 14 and Period 3 of the Periodic Table. What is the electron arrangement of an atom M?
2.3
2.4
2.8.3
2.8.4
M, G, J, L
G, M, L, J
G, J, L, M
M, L, J, G
Table 2 shows the relative atomic masses and number of neutrons for the elements G and J. G and J are not the actual symbols of the elements.
Which of the following statements are true about these elements?
I Element G is more reactive than element J.
II Atoms G and J have two valence electrons.
III Elements G and J are in the same group in the Periodic Table.
IV Elements G and J can conduct electricity.
I and II
I and III
II and IV
III and IV
An atom Y with nucleon number of 23 has 12 neutrons. Which element has the same chemical properties as element Y?
[Proton number: B = 5, Mg = 12, Cl = 17, K = 19]
Boron
Magnesium
Chlorine
Potassium
Neon gas is used to provide an inert atmosphere for welding. Which of the following explains this property of neon?
It has a stable electron
arrangement
It is placed in Group 18 of the
Periodic Table
It exists as monoatomic gas
It has low melting and boiling
points
Element R is located in the same group as lithium in the Periodic Table of Element. Which of the following are the properties of R?
Diatomic particle
Reacts vigorously with water
Cannot conduct electricity
High melting and boiling points
An atom of element T has an electron arrangement of 2.8.8.1. An atom of element W has 4 neutrons and relative atomic mass of 7. Which of the following statements is true about elements T and W?
Element W is more reactive than element T.
Melting point of element W is lower than element T.
Reaction of element W with water is less vigorous than that of element T.
Density of element W is higher than that of element T.
Element G, J, and L are located in Group 17 of the Periodic Table. Atomic radius of element J is the smallest. In an experiment, when vapour L is passed over hot iron wool, the iron wool glows brightly. When vapour G is passed over hot iron wool, the iron wool glows dimly. The reactivity of elements G, J, and L in ascending order is ...
L, G, J
G, L, J
G, J, L
J, L, G
Table 3 shows the nucleon number and number of neutrons for elements W, X, Y and Z.
W
X
Y
Z
Which property is similar for chlorine, bromine, iodine and astatine in Group 17 of the Periodic Table?
I Reacts with water to form an acidic solution.
II Reacts with sodium hydroxide solution to form two salts.
III Exist as solid at room temperature.
IV All are good bleaching agents.
I and II
I and III
II and IV
III and IV
Which characteristic is correct for the elements according to the sequence as shown below?
Solubility in water increases
Reactivity increases
Electrical conductivity increases
The strength to accept an electron decreases
Table 4 shows the relative charge of nucleus of atoms G, J, and M. Which of the following about elements G, J, and M is true?
The atomic size of element G is bigger than element J.
Element M cannot combine with element J to form a compound.
Element G is more reactive than element M.
Element G is less electronegative than element M.
Which of the following is NOT an acidic oxide?
Carbon dioxide
Aluminium oxide
Sulphur dioxide
Boron oxide
Which of the following is caused by hydrogen bonds?
Iceberg floating on the surface of the sea
Metals can conduct electricity while non-metals cannot
Sticky damp hair strand
Salt can dissolve in water but not organic solvent
Which cation produces a yellow precipitate when reacted against potassium iodide, KI?
Cu2+
Pb2+
Fe2+
Zn2+
what charge does the nucleus have ?
none
negative
positive
Which one is very unreactive?
helium
fluorine
sodium
calcium
how many neutrons does this isotope of chlorine have ?
35
17
18
19
what element is this?
lithium
sodium
hydrogen
helium
how many electrons would this aluminium ion have ?
10
13
27
3
which of the following is NOT true
the oxygen ion has 8 protons
the oxygen ion has 10 electrons
the oxygen ion has 8 electrons
the oxygen ion's mass number is 16
What is the atomic number?
the number of protons in the nucleus
the number of protons and neutrons in the nucleus
the number of neutrons in the nucleus
the number of protons in the energy levels
What is the mass number?
the number of protons in the nucleus
the number of protons and neutrons in the nucleus
the number of neutrons in the nucleus
the number of protons and electrons in the atom
How many electrons does this atom have?
2
4
6
10
How many protons are in the nucleus of the element shown?
19
9
10
28
Choose all of the correct Cation
Fe3+
K+
F-
O2-
How many atoms are there in 2 mol of chlorine gas?
[Avogardo constant: 6.02 x 1023 mol-1]
1.204 x 1024
2.408 x 1024
3.612 x 1024
4.816 x 1024
Calculate the relative formula mass of Zn(NO3)2.
[Relative atomic mass: Zn=65, N=14, O=16]
127
175
189
254
What is the emperical formula for this oxide?
JO
J2O
J2O3
J3O2
Limewater turns milky and a black solid is formed. Which of the following equations correctly represent the reaction?
Cu2CO3 ---> Cu2O + CO2
CuCO3 ---> CuO + CO2
CuCO3 ---> CuO2 + CO2
CuCO2 ---> Cu + CO2
What is the other name given to
Group 1?
Halogen
Noble gas
Alkaline earth metal
Alkali metal
The electron arrangement of atom J is 2.8.2 and the electron arrangement of atom L is 2.7. Element J and L react to form a compound. Which of the following is true about the reaction?
Atom L donates 7 electrons
Atom J receive 1 electron
An ionic compound is formed
The ionic compound formed has the chemical formula J2L.
Which of the following pairs of element can conduct electricity in aqueous solution?
P and Q
P and R
R and T
R and U
Which of the following is the pH value of the sulphuric acid with the concentration of 0.1 mol dm-3 ?
0.1
0.2
0.7
1.0
20.0cm3 of 0.4 mol dm-3 sodium hydroxide is titrated with sulphuric acid. What is the volume of 1.0 mol dm-3 sulphuric acid needed to neutralise the sodium hydroxide solution?
4.0cm3
8.0cm3
10.0cm3
12.0cm3
The reaction between hydrochloric acid and calcium carbonate produces carbon dioxide gas. The reaction is complete in 50 seconds and the maximum volume of gas produced is 25cm3. What is the average rate of reaction?
0.5 cm3 s-1
1.0 cm3 s-1
2.0 cm3 s-1
4.0 cm3 s-1
What is Avogadro's number?
6.02 x 1023
1 mole
600 million
6.02
How many moles are in 6.02 x 1023 molecules of H2O?
1 mole
2 moles
6.02 moles
602000000000000000000000 moles
40 cm3 of 1.0 mol dm-3 hydrochloric acid is neutralized by 25cm3 of barium hydroxide solution. What is the molarity of barium hydroxide?
40 cm3asid hidroklorik 1.0 mol dm-3 dineutralkan oleh 25cm3 larutan barium hidroksida.
Berapakah kemolaran larutan barium hidroksida?
0.625 mol dm-3
0.800 mol dm-3
1.600 mol dm-3
3.500 mol dm-3
A dibase acid, H2SO4 has the concentration of 0.5 mol dm-3. What is the volume of potassium hydroxide, KOH, 1.0 mol dm-3 that can neutralize 25.0 cm3 of the H2SO4 acid solution?
Satu acid dwibes, H2SO4mempunyaikepekatan 0.5 mol dm-3 .Berapakah isipadu kalium hidroksida, KOH, 1.0 mol dm-3 yang dapat meneutralkan 25.0 cm3 larutan H2SO4?
6.25 cm
12.50 cm3
25.00 cm3
50.00 cm3
Diagram shows the set-up of apparatus for the titration of sodium hydroxide solution with a diprotic acid, H2X. The letter X is not the actual symbol of the element.
Rajah menunjukkan susunan radas bagi proses pentitratan larutan natrium hidroksida dengan asid diprotik, H2X. Huruf X bukan simbol sebenar unsur itu.
25.0 cm3 of H2X acid neutralises 20.0 cm3 of sodium hydroxide solution,
NaOH 1.0 mol dm-3. What is the molarity of the acid, H2X?
25.0 cm3 asid H2X meneutralkan 20.0 cm3 larutan natrium hidroksida,
NaOH, 1.0 mol dm-3. Berapakah kemolaran asid H2X?
0. 2 mol dm-3
0. 4 mol dm-3
0. 6 mol dm-3
0. 8 mol dm-3
The chemical equation shows the reaction between excess sulphuric acid solution with sodium hydroxide solution.
Persamaan kimia menunjukkan tindak balas antara larutan asid sulfurik berlebihan dengan larutan natrium hidroksida.
2NaOH (aq) + H2SO4 (aq) ----> Na2SO4 (aq) + 2H2O
12.5 cm3 of 0.5 mol dm-3 sulphuric acid solution neutralises 50 cm3 of sodium hydroxide. Determine the concentration of the sodium hydroxide solution.
12.5 cm3 0.5 mol dm-3 larutan asid sulfurik meneutralkan 50 cm3 natrium hidroksida. Tentukan kepekatan larutan natrium hidroksida.
0.10 mol dm-3
0.20 mol dm-3
0.25 mol dm-3
0.50 mol dm-3
The diagram shows the apparatus set -up for the titration between barium hydroxide solution and nitric acid.
Rajah menunjukkan susunan radas bagi pentitratan antara larutan barium hidroksida danasid nitric.
The equation for the reaction is shown below.
Persamaan bagi tindak balas ditunjukkan di bawah
Ba(OH)2 + 2HNO3 -----> Ba(NO3)2 + 2H2O
What is the volume of nitric acid needed for the titration to reach end point?
Berapakah isipadu asid nitrik diperlukan bagi mencapai takat akhir pentitratan?
14.5 cm3
25.0 cm3
50.0 cm3
75.0 cm3
The chemical equation shows the dissociation of barium hydroxide in water.
Persamaan kimia menunjukkan penceraian barium hidroksida dalam air.
Ba(OH)2 (aq) -----> Ba 2+( aq ) + 2 OH –(aq)
What is the number of moles of hydroxide ion in 250 cm3 of 0.2 moldm-3 barium hydroxide?
Berapakah bilangan mol ion hidroksida dalam 250 cm3 0.2 moldm-3 barium hidroksida?
0.05 mol
0.10 mol
0.20 mol
0.80 m
What is the volume of 2.0 mol dm-3 potassium hydroxide solution is needed to prepare 500 cm3 of 0.1 mol dm-3 potassium hydroxide solution?
Berapakah isipadu larutan kalium hidroksida 2.0 mol dm-3 yang diperlukan untuk menyediakan 500 cm3 larutan kalium hidroksida 0.1mol dm-3?
25 cm3
50 cm3
100 cm3
500 cm3
Diagram shows two volumetric flasks containing 2.0 moldm-3 of hydrochloric acid and 0.2mol dm-3 hydrochloric acid.
Rajah menunjukkan dua kelalang isipadu yang mengandungi asid hidroklorik 2.0 moldm-3 dan asid hidroklorik 0.2 mol dm-3.
What is the volume of 2.0 mol dm-3 hydrochloric acid needed to prepare 100 cm3 of 0.2 mol dm-3 hydrochloric acid?
Apakah isipadu asid hidroklorik 2.0 mol dm-3 yang diperlukan untuk menyediakan 100 cm3 asid hidroklorik 0.2 mol dm-3?
20.0 cm3
10.0 cm3
5.0 cm3
1.0 cm3
Which of the following is the Dilution Formula?
V1M1 = V2M2
M = m/V
V = mT
PV = nRT
What volume, in milliliters, of 10.0 M NaOH is needed to prepare 300.0 mL of 2.00 M NaOH by dilution?
0.067 mL
60.0 mL
100 mL
125 mL
