1. Which
one of the following statements is incorrect regarding mole concept?
(a)
|
A mole is the gram atomic or gram molecular mass or gram formula mass of a substance. |
(b)
|
1 mole of all elements contains
6.02 x 1023 particles irrespective of their states.
|
(c)
|
1 mole of all gases at s.t.p.
occupies 22.4 m3.
|
(d)
|
11.2 dm3 of hydrogen
gas at s.t.p. weighs 1 g.
|
2. Which
one of the following statements is incorrect regarding empirical formula?
(a)
|
It shows the simplest atomic
ratio.
|
(b)
|
Empirical formula of acetic
acid and glucose is CH2O.
|
(c)
|
Ionic or inorganic compounds
are usually represented by their empirical formulae.
|
(d)
|
It is an integral multiple of
molecular formula.
|
3. Which
one of the following statements is false regarding molar volume?
(a)
|
It is the volume occupied by 1
mole of any gas at s.t.p.
|
(b)
|
Its value is same at all
temperature and pressures.
|
(c)
|
Its value is 22.4 dm3 (liter)
or 22400 cm3 (ml) or 0.0224 m3.
|
(d)
|
Its value is computed by using
expression RT/P.
|
4. An
element has an atomic number of 11, the element is:
(a)
|
A metal with oxidation number
of +1.
|
(b)
|
A metal with an oxidation
number of +2.
|
(c)
|
An inert gas.
|
(d)
|
A non-metal with oxidation
number of -1.
|
5. Isotopes
differ in:
(a)
|
Arrangement of electrons in
orbitals.
|
(b)
|
The extent to which they may be
affected in electromagnetic field.
|
(c)
|
Properties which depend upon
mass
|
(d)
|
Chemical properties.
|
6. Which
one of the following statements is not true?
(a)
|
Isotopes with even atomic
masses are comparatively abundant.
|
(b)
|
Isotopes with odd atomic masses
are comparatively abundant.
|
(c)
|
Isotopes
with even atomic masses and even atomic numbers are comparatively abundant.
|
(d)
|
Isotopes
with even atomic masses and odd atomic numbers are comparatively abundant.
|
7. Many
elements have fractional atomic masses. This is because:
(a)
|
The mass of the atom is itself
fractional.
|
(b)
|
Atomic masses are average
masses of isobars.
|
(c)
|
Atomic masses are average
masses of isotopes.
|
(d)
|
Atomic
masses are average masses of isotopes proportional to their relative
abundance.
|
8. A
limiting reactant is the one which:
(a)
|
Is taken lesser quantity in
volume compared to the other reactants.
|
(b)
|
Is taken in lesser quantity
grams as compared to other reactants.
|
(c)
|
Produces the minimum amount of
the product under consideration.
|
(d)
|
Gives the maximum amount of the
product which is required.
|
9. Which
one of the following statement is not true?
(a)
|
The empirical and molecular
formulae of some compound are same.
|
(b)
|
Stoichiometric calculations can
only be done if no side reaction occurs.
|
(c)
|
A limiting reactant is consumed
at the end of the reaction.
|
(d)
|
Actual yield is always greater
than the theoretical yield.
|
10. Which
one of the following statement is not true?
(a)
|
In stoichiometric calculations,
low of definite proportions is definitely obeyed.
|
(b)
|
Isotopes of an element differ in
number of protons and so their masses are different.
|
(c)
|
Stoichiometric
amounts are the amounts of reactants and products in a balanced chemical equation.
|
(d)
|
Isotones are atoms of the
element having same number of neutrons.
|
11. A
quantity containing Avogadro’s number of particles is called:
(a)
|
Gram atom
|
(b)
|
Gram molecule
|
(c)
|
Mole
|
(d)
|
Gram formula
|
12. One
mole of hydrogen gas at s.t.p. contains how many atoms?
(a)
|
6.02x1023
|
(b)
|
3.01x1024
|
(c)
|
1.2x1024
|
(d)
|
12.04x1046
|
13. how many significant figures are
contained in 0.00050890400?
(a)
|
6
|
(b)
|
4
|
(c)
|
8
|
(d)
|
11
|
14. 16
g of oxygen has a volume of:
(a)
|
22.4 dm3
|
(b)
|
11.2 dm3
|
(c)
|
5.6 dm3
|
(d)
|
22400 cm3
|
15. 11.2
dm3 of Cl2 gas at s.t.p. weighs:
(a)
|
71g
|
(b)
|
17 g
|
(c)
|
35.5 g
|
(d)
|
37 g
|
16. Which
one of the following represents the value of 1 a.m.u.?
(a)
|
1.667x10-24 g
|
(b)
|
1.667x10-23 g
|
(c)
|
1.667x10-27 g
|
(d)
|
1.667x10-28 g
|
17. What
is the ratio of the weight of water formed to the weight of Hydrogen used in
the formation of water?
(a)
|
1 : 8
|
(b)
|
1 : 9
|
(c)
|
8 : 1
|
(d)
|
9 : 1
|
18. The
percentage of which of the following element in an organic compound cannot be measured directly?
(a)
|
Carbon
|
(b)
|
Hydrogen
|
(c)
|
Oxygen
|
(d)
|
Sulphur
|
19. Stoichiometric
calculation of a reaction gives us …………yield.
(a)
|
Actual
|
(b)
|
Theoretical
|
(c)
|
Both a and b
|
(d)
|
None of the above
|
20. Actual
yield is always …………. than the theoretical yield.
(a)
|
More
|
(b)
|
Less
|
(c)
|
Both a and b
|
(d)
|
None of the above
|
21. The
mass of one mole of electrons is:
(a)
|
1.008 mg
|
(b)
|
0.55 mg
|
(c)
|
0.184 mg
|
(d)
|
1.673 mg
|
22. The
number of moles of CO2 which contain 8.0 g of oxygen:
(a)
|
0.25
|
(b)
|
0.50
|
(c)
|
1.0
|
(d)
|
1.50
|
23. The
largest number of molecules are present in:
(a)
|
3.6 g of water
|
(b)
|
4.8 g of C2H5OH
|
(c)
|
2.8g of CO
|
(d)
|
5.4 g of N2O5
|
24. One
mole of SO2 contains:
(a)
|
6.02 x 1023 atoms of
oxygen
|
(b)
|
6.02 x 1023 atoms of sulphur
|
(c)
|
18.1 x 10 23
molecules of SO2
|
(d)
|
4 gram atoms of SO2
|
25. The
formula of KAl(SO4)2 represents a total of:
(a)
|
6 atoms
|
(b)
|
7 atoms
|
(c)
|
12 atoms
|
(d)
|
14 atoms
|
26. How
many neutrons are contained in the nucleus of an element with Z=27 and A= 59:
(a)
|
27
|
(b)
|
32
|
(c)
|
59
|
(d)
|
86
|
27. How
many gram of NaOH are needed to make 1000g of a 5% solution?
(a)
|
5g
|
(b)
|
500g
|
(c)
|
40g
|
(d)
|
50g
|
28. Chlorine
atom and chloride ions
(a)
|
Have same number of protons
|
(b)
|
Have same number of electrons
|
(c)
|
Are allotropes of chlorine
|
(d)
|
Are chemically identical
|
29. Which
of the following formula represents an acid anhydride?
(a)
|
CaO
|
(b)
|
H2O
|
(c)
|
H2SO4
|
(d)
|
SO3
|
30. Which
of the following formula represents a basic anhydride?
(a)
|
MgO
|
(b)
|
CrO3
|
(c)
|
CO
|
(d)
|
NO
|
31. The
basic oxide in the given list is:
(a)
|
N2O5
|
(b)
|
P4O6
|
(c)
|
Sb4O6
|
(d)
|
Bi2O3
|
32. If an element M forms an oxide with formula MO, which of the
following is a correct formula:
(a)
|
MCl
|
(b)
|
MS
|
(c)
|
MCl2
|
(d)
|
Both b and c
|
33. nm
is …………. than μm.
(a)
|
Equal to
|
(b)
|
Less
|
(c)
|
Greater
|
(d)
|
All of the above
|
34. Which
one is large than dm3?
(a)
|
cm3
|
(b)
|
Liter
|
(c)
|
m3
|
(d)
|
ml
|
35. The
decimal equivalent of 1/60 to three significant figures is:
(a)
|
0.156
|
(b)
|
0.0166
|
(c)
|
0.00166
|
(d)
|
1.666 x10−2
|
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