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Worksheets1st round 4th set
Total questions: 45
Worksheet time: 34mins
Which of the following contains 6.02x1023 atoms?
1 mole of hydrogen gas
1 mole of oxygen gas
1 mole of neon gas
1 mole of chlorine gas
Which of the following substance is made up of ion?
Zinc
Ammonium chloride
Naphtalene
Oxygen gas
WHich of the following is correct about an electrolyte?
Has free moving ions in aqueous state
Exists as liquid at room temperature
Dissolves in water
Can conduct electricity in solid
A child is having a fever.Her mother takes him to a doctor.What medicine the doctor prescribes to the child?
Aspirin
Barbiturate
Penicilin
Paracetamol
Which acid is monoprotic acid?
Sulphuric acid
Hydrochloric acid
Carbonic acid
Magnesium reacts with hydrochloric acid.State the process that happen to magnesium.
Oxidation
Reduction
Which of the following pairs of ,metals in voltaic cell gives the lowest voltmeter reading/
Magnesium and copper
Zinc and copper
Tin and copper
What is the meaning of Avogadro constant?
Number of particles in one mole of a substance
Pressure of one mole of a substance
Volume occupied by on mole of gas
Mass of one mole of a substance
Wich of the following substances is suitable to be used to make a goggle?
Polyethene
Polyvinyl chloride
Perspek
Polystyrene
Which of the following statements is true for one mole of substance?
1 mol of copper contains 6.02x1023
1 mole of oxygen gas contains 6.02x1023 atoms
1 mol of water contains the same number of atoms asin 12 g of carbon-12
1 mole of carbon dioxide contains the same number of molecules asthe number of atoms in 12 g of carbon-12
What is the contribution of Ernest Rutherford in the development of atomic models' history?
Discovered electron
Discovered proton
Proved the existence of neutrons
Proposed that the electron move in shells around nucleus
A student adds magnesium ribbon into four different solutions. Which solution produce the highest rate of reaction?
100cm3 of 2.0mol dm-3 CH3COOH
100cm3 of 2.0mol dm-3 HCl
100 cm3 of 2.0 mol dm-3 H2SO4
100 cm3 of 2.0mol dm-3 H3PO4
Which of the following substance acts as oxidizing agent?
Sodium sulphite solution
Chlorine water
Magnesium powder
Potassium bromide solution
Which compouns is formed by transferring electrons?
Ammonia
Lithium oxide
Carbon monoxide
Hydrogen chloride
Unsaturated fats can be converted to saturated fats through the X process.What is X?
Hydrogenation
Halogenation
Dehydration
Substitution
Which of the following occurs in oxidation reaction
Loss of oxygen
Gain of electron
Gain of hydrogen
Increase in oxidation number
Which of the following chemical formulae is correct?
Li2O
KBr2
Al3Cl
MgNO3
Among the particles in ammonia solution,what are the particles that cause the ammonia solution to be alkaline?
NH3
NH4+
OH-
Which of the following is a redox reaction?
Igniting the gas stove
A reaction of acid on latex
Using cold pack to relieve muscle pain
Washing oil-stained clothes using soap
Zn (s) + 2H+ (aq) --> Zn2+ (aq) + H2 (g)
Referring to the above equation,what is the change in oxidation number of hydrogen?
0 to +1
0 to +2
+1 to 0
+1 to +2
This particle is found in the nucleus and has no charge.
Neutron
Proton
Electron
Nucleon
Which of the following amoutn of substances contains the same number of atoms as in 0.69 g of sodium?
(Relative atomic mass of C=12, O=16, Na=23, Ca=40 and Avagadro constant=6.02x1023)
0.06g hydrogen gas
0.12g calcium
0.48g oxygen gas
0.69g carbon
A complete combustion of a hydroarbon G gives 0.66g of Carbon dioxide and 0.6 g of water.The empirical formula of G is
C3H6
C3H8
C3H10
C6H12
Determine the molality of 35% by mass of HCl solution.
10.0 m
16.0m
15.0m
35.0m
How many orbitals can be accomodated in an atom with a maximum quantum umber of n=3?
9
10
14
12
What is the spectrum region for Balmer series?
Ultraviolet
Visible
Infrared
Which of the following is true about de Broglie postulate?
Small particles like electrons process wave properties
Small particles like electrons always move in a circular orbit
small particles like electrons should be confined to specific orbits
Calculate the energy needed to excite two moles of electrons from n=2 to n=4
246 kJ
492 kJ
738 kJ
984 kJ
Which of the following elements in the third period has the highest boiling point?
Sodium
Magnesium
Silicon
Phophorus
Which law states that at constant pressure,thevolume of a fixed mass of gas is directly proportional to its absolute temperature?
Boyle's Law
Charle's Law
Avogadro's Law
The number of valence electrons for atoms X and Y are 5 and 7 respectively.Which of the following chemical formula and type of bonding are TRUE for the compound formed between X and Y?
Chemical formula: XY2
Type of Bonding: ionic
Chemical formula:XY2
Type of bonding:covalent
Chemical formula: XY3
Type of Bonding: covalent
Chemical formula: XY3
Type of bonding: ionic
Which of the following molecules is tetrahedral in shape?
CHCl3
XeF4
BrF5+
SF6
The following statements are the basis of the Kinetic Molecular Theory of an ideal gas except
gases consist of microscopic particles which have no attraction for one another
the volume occupied by a gas consists mostly of empty space and is taken as equal to the volume of the container
the collisions are perfectly elastic
a mole of any gas always occupies a volume of 22.4 L at s.t.p.
Which of the following has carboxamide group?
HCOOCH3
HCOOCOCH3
CH3CONH3
CH3CH2COCH2CH3
Which of the following doesn't produce sooty flame?
Benzene
Hexane
Naphtalene
Anthracene
Which of the following gases is a monoatom gas?
Fluorine
Helium
Oxygen
Hydrogen
Each carbon atoms in graphite are covalently bonded to how many other carbon atoms?
3
6
8
12
Choose the wrong statement.
Benzene undergoes electrophilic substitution
Benzene is volatile with low boiling point
Benzene has delocalized pi electron
Benzene is polar and non-polar
Nitration of benzene is carried out by which of the following reactive species?
NO2+
NO2-
HNO3
NO3
Arenes do not show________.
delocalization of pi electrons
greater stability
resonance
electrophilic additions
When a system is in equilibrium,the rate of forward reaction equals to the rate of the reverse reaction.
True
False
The concentrations of______ and pure liquid are ommited in the equilibrium constant as their concentration do not change significantly.
Solid
Gas
The conventional equilibrium constant expression(Kc) for the system as described by the above equation is:
[SO2]2/[SO3]2
[SO2]2[O2]/[SO3]2
[SO3]2/[SO3]2[O2]
[SO2][O2]
Consider the following reactions:
If the following constant for Reaction I has a value of 4.0,what is the value of the equilibrium constant for Reaction II at the same temperature?
0.25
0.063
2.0
8.0
A mixture of N2--H2 with initial ratio 1:3 achieved equilibrium when 50% of N2 was reacted.Given the total pressure at equilibrium is p,determine the partial pressure of nitrogen at equilibrium.
p/2
p/6
p/7
p/8
