WorksheetsOpps chem
Total questions: 20
Worksheet time: 18mins
Which of the following substances consist of atoms?
Magnesium
Oxygen
Lead(II) bromide
Naphthalene
Why carbon-12 was chosen as a reference standard for relative atomic mass and relative molecular mass?
Carbon has three isotopes
Carbon is non-metal element
Carbon is a solid and easier to be handle
Carbon is located in Group 14 in the Periodic Table of Elements
Which of the following particles equal to 1 mole?
The number of atom in 1 g of hydrogen gas
The number of molecule in 1 g of hydrogen gas
6.02 x 1023 of hydrogen atoms in hydrogen gas
6.02 x 1023 of hydrogen molecule in hydrogen gas
Which of the following gases contains 0.4 mol of atoms at room temperature and pressure?
[1 mol of gas occupies the volume of 24 dm3 at room temperature and pressure]
4.8 dm3 He
4.8 dm3 H2
4.8 dm3 SO3
4.8 dm3 CO2
Which of the following gases exists as a monoatom?
Neon gas
Oxygen gas
Nitrogen gas
Carbon dioxide gas
Which characteristics is correct about elements in Group 1 in the Periodic Table as going down the group?
The tendency to release electron decreases
The reactivity decreases
All are conductor of heat
All insoluble in water
Antara yang berikut, yang manakah boleh bertindak sebagai elektolit?
Conducts heat only in the molten state
Conducts electricity in the molten and aqueous states
Conducts electicity in the solid state
Conducts electricity only in the liquid state.
Which of the following substances is a monoprotic acid?
Propanoic acid, C2H5 COOH
Phosphoric acid, H3PO4
Sulphuric acid, H2SO4
Carbonic acid, H2CO3
Which of the following salts can be prepared by the double decomposition method?
Magnesium sulphate
Ammonium chloride
Copper(II) nitrate
Lead (II) iodide
What is the general formula of alkenes?
CnH2n + 2
CnH2n
CnH2n + 1OH
CnH2n + 1COOH
What is the name of the substance that gives the pleasant fragrance?
Ethane -1,2 - diol
Ethanoic acid
Ethanol
Benzyl ethanoate
Which of the following is a redox reaction?
Displacement reaction
Neutralisation reaction
Substitution reaction
Precipitation reaction
Which of the following ingredients is an flavor in the cereal?
Calcium carbonate
aspartame
tartazine
glycerol
Iron and copper are transition metals. Which of the following is the special characteristic of the metals?
Soft solid
Soluble in water
Low melting point
Has more than one oxidation number
In the extraction of aluminium by electrolysing molten aluminium oxide, cryolite is added to the mixture to
catalyse the electrolysis process
absorb the released oxygen gas
lower the melting point of aluminium oxide
increase the purity of the aluminium obtained
Calculate the percentage of nitrogen in ammonium nitrat, NH4NO3
Given that the relative atomic mass of H = 1, N = 14, O = 16
34.5
35.0
35.4
53.0
A method to control the rusting of underground iron pipelines is through sacrificial protection.
Which of the following is the sacrificial metal?
Copper
Lead
Tin
Zinc
The rate of reaction for decomposition of hydrogen peroxide decreases in time because
product of reaction decrease
temperature of hydrogen peroxide decrease
volume of hydrogen peroxide decerase
concentrationof hydrogen peroxide decrease
An alkane has the molecular formula, C20Hx. What is the value of x?
40
42
48
52
Name the IUPAC name for the organic compound given.
3-etylbutane
2-ethylbutane
3-methylpentane
hexane
