Question

1. Identify the set of oxides that consist of an acidic,
basic, a neutral and an amphoteric oxide
respectively
a. SO3 , CaO, H2O, Al3O3
b. SO3, MgO, NO, Na2O
c. N2O, K2O, H2O, ZnO
d. CO2, CO, SO2, Al2O
2. Reactions of alkene are mostly
a. Elimination reactions
b. Subtraction reaction
c. Substitution reaction
d. Addition reaction
3. The thermal stability of alkaline earth metal
nitrate is in the order
Mg(NO3)2 is the correct reason for this observation?
a. The higher the melting point of these nitrates
b. The increase in the ionic radius of the element
c. The change in the electronegativity of the
element
d. The charge of the metal ion
4. Which of the following factors does not influence
the ionisation energy of an element/
a. Distance between nucleus and electron
b. Nuclear charge of an element
c. The isotopic nature of the element
d. Screening effect of the electron
5. Which factors helps to explain why the first
ionisation energy of the Group I elements decrease
down the group?
a. The nuclear charge of the elements increases
b. The outer electron is in an “s” subshell
c. The repulsion between spin – paired electron
increase
d. The shielding effects of then inner shells
increases
7. What type of oxides does Group I elements form?
a. Acidic oxides
b. Amphoteric oxides
c. Basic oxides
d. Neutral
8. A compound, G has the following composition by
mass: C, 66.7%; H, 11.1%; O, 22.2% and has
molecular formula of G?
[C = 12, O = 16, H = 1]
a. C4H10O
b. C4H8O
c. C3H6O2
d. C4H8O2
9. In the Modern Periodic Table, transition metals
are found in
a. s – block
b. p – block
c. d – block
d. f – block
10. Example of a fully closed shell is:
a. 2s
2
2p6
b. 4s2
3d4
c. 3s2
3p6
d. 4s2
3d104p
11. Ethene reacts with oxygen according to the
equation:
C2H4(g) + 3O2(g) → 2CO2(g) + 2H2O(g)
15.0cm3
of ethene were mixed with 60cm3
of
oxygen and the mixture was sparked to complete
the reaction. What is the volume of products? (All
volume were measured at room temperature and
pressure)
a. 15.0cm3
b. 45.0cm3
c. 60.0cm3
d. 75.0cm3
12. In which set do all species contain the same
number of electrons
a. Co
2+
, Co3+, Co4+
b. F
-
, Br-
, Clc. Na+
, Mg2+, Al3+
d. K2SO4, K2SeO4, K2TeO4
13. Select an example each of pure covalent and
pure ionic hydrides from the following list of
hydrides: H2O(1), HC1(g),NaH(s), CH4(g), B2H6(g)
a. HCl(g) and H2O(l)
b. H2O(l) and B2H6(g)
c. CH4(g) and NaH(s)
d. NaH(s) and B2H6(g)
14. The type of reaction that is peculiar to benzene
is:
a. Hydrolysis
b. Addition
c. Substitution
d. Polymerization
15. An example of aliphatic unsaturated
hydrocarbon is
a. Cyclobetene
b. Propene
c. Pentane
d. Benzene
16. What would be the outer electron configuration
of halogens?
a. ns
2
np6
b. ns2
np5
c. ns2
np7
d. ns2
nd
5
np0
17. Colour in transition metal compounds is
attributed to:
a. Small metal size ion
b. Absorption of light in UV region
c. Complete (ns) subshell
d. Incomplete (n-1)d subshell
18. The 3d metal ions are generally paramagnetic in
nature because
a. They form coloured salts
b. They have one or more unpaired electron
c. They have one or more paired s – electrons
d. They are reducing agents
19. The IUPAC name of CH3 – C(CH3)OH – CH2
– CH (CH3)2 is
a. 2, 4 – dimethylpentan – 2 – ol
b. 2, 4 – dimethylpentan – 4 – ol
c. 2, 2 – dimethylbutan – 2 – ol
d. Butanol – 2
20. The flame used by welders in cutting metal is
a. Butane gas flame
b. Acetylene flame
c. Propane flame
d. Oxy – acetylene flame

Answer 1

Answer:

a.SO3, CaO, H2O, Al3O3

Explanation:

Because moving along a period acidic character increases and aluminium has amphoteric nature.