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Question 1 : The most important uses of hydrogen in the
manufacture of ammonia
hydrogenation of oil
manufacture of ethyl alcohol
manufacture of methyl alcohol
Question 2 : In which of the following compounds is the oxidation number of nitrogen equal + 4?
NO2
N2O
No
HNO3
Question 3 : Amphoteric oxides are oxides which
react with water to form acids
react with water to form alkali
react with both acids and alkalis
Question 4 : The following acids are monobasic except
trioxonitrate (v) acid
hydrochloric acid
tetraoxosulphate (vi) acid
ethanoic acid
Question 5 : When an atom gains an electron, it becomes
chemically inactive
a complexion
a cation
negatively charged
Question 6 : A solution of PH 7 is
acidic
neutral
concentrated
dilute
Question 7 : An atom with 17protons, 17electrons and 18 neutrons has a mass number of
17
18
34
35
Question 8 : The valence electrons of the element 12Mg are in the
1s orbital
2s orbital
2px orbital
3s orbital
Question 9 : Dehydration of ethanol produces
ethanoic acid
propan-1,2,3-triol
ethene
ethanol
Question 10 : Calcium atom ionizes by
gaining two lectrons
losing two electrons
sharing two electrons
gaining two protons
Question 11 : Which of the following on burning in air, contributes to acid rain?
sulphur
zinc
aluminium
magnesium
Question 12 : All except one metal, can displace hydrogen from water or acids
zinc
silver
potassium
heated magnesium
Question 13 : An isotope of hydrogen commonly referred to as heavy water
protium
deuterium
tritium
basic water
Question 14 : Which one is an amphoteric oxide?
Sio2
AL2O3
Cuo
CaO
Question 15 : Extraction of sulphur from the earth’s crust is by one of these processes
solvary process
contact process
frash process
kiln process
Question 16 : Sulphur (iv) oxide bleaches by
oxidation
reduction
decomposition
carboxylation
Question 17 : The atomic number of chlorine is 17. What is the number of electrons in a chloride ion?
16
17
18
19
Question 18 : What is the expression for the equilibrium constant (kc) for the following reaction? N2(g)+O2(g) 2NO(g)
[NO]2/[N2] + [O2]
[N2] + [O2]/2[NO]2
[NO]2/[N2] [O2]
[2NO]2/[N2] [O2]
Question 19 : A hydrogen atom which has lost an electron contains
one proton only
one neutron only
one proton and one newtron
one proton, one electron and one newtron
Question 20 : The electronic configuration of an element is 1S2 2S2 2P2 3S2 3P3. Where is the element located in the periodic table?
group iii period 3
group iii, period 5
groupv and period 3
group v, period 5
Question 21 : When sodium atom forms the ion Na+,
it gains one electron
it gains one proton
its atomic number increases
it achieve nobles gas configuration
Question 22 : What is the percentage composition of oxygen in K2 Cr2 O7? [K2 Cr207]=298, 0=16, K=39, Cr=52]
14.53%
26.53%
35.37%
38.09%
Question 23 : Which of these metals will not liberate hydrogen from dilute HCL?
copper
zinc
iron
magnesium
Question 24 : Consider the following elements and their electronic configurations W: 1S2 2S2 X: 1S2 2S2 2P6 Y: 1S2 2S2 2P6 3S2 Z: 1S2 2S2 2P6 3S2 2P2
w and x only
y and z only
w and y only
w, y and z only
Question 25 : Diamond does not conduct electricity because it
has no free valence electrons
is a giant molecule
contain no bonded electrons
is a solid at room temperature
Question 26 : What is the atomic number of an element whose cation y+ has the electronic configuration? 1S2 2S2 2P6?
9
10
11
12
Question 27 : The colour of phenolphthalein indicator in dilute HNO3(ag) is
colourless
orange
pink
purple
Question 28 : A mixture of kerosene and diesel oil can be separated by
crystallization
distillation
sublimation
fractional distillation
Question 29 : What is the value of -140c on the Kelvin temperature scale?
259k
287k
259 degree kelvin
287 degree kelvin
Question 30 : The separation of petroleum fractions depends on the differences in their
boiling point
melting points
solubilities
molar mags
Question 31 : Which of the following elements is a d-block element?
calcium
iron
lithium
silicon
Question 32 : The minimum amout of energy required for effective collisions between reacting particles is known as
activation energy
bond energy
kinetic energy
ionization energy
Question 33 : Which of the following oxides is basic?
NO2
AL203
SO3
CaO
Question 34 : Consider the reaction representd by the following equation xKMnO4(ag) + ySo2(g) + zH2O(L) k2SO4(ag) + 2MnSo4(ag)+ 2H2SO4(ag) . x,y and z are respectively
2, 5and 2
2, 2 and 5
5, 1 and 2
1, 5 and 2
Question 35 : Which of the following ions has the electronic configuration 2, 8, 8,?
Na+
mg2+
F-
cL-
Question 36 : The shape of a graphite crystals is
tetrahedral
pyramidal
octahedral
hexagonal
Question 37 : Ammonia reacts with excess chlorine to produced
ammonia chloride
a chloride and free nitrogen
double chloride
a hydrogen chloride and free nitrogen
Question 38 : What is the basicity of the acid in the following reaction? Na2CO3(ag) + 2CH3 COOH(ag) 2CH3COONa(ag) +H2O(L)+CO2(g)
1
2
3
4
Question 39 : Substances which absorb water from the atmosphere without dissolving in it are said to be
anhydrous
hydroscopic
efflorescent
hydrated
Question 40 : Which of the allotropes of sulphur has amber colour with needle shape
rhombic sulphur
flower sulphur
monoclinic sulphur
plastic sulphur
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