Which of the following sugars is a product of the condensation of monosaccharides?
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(B)
maltose
3
The cleansing effect of soap is low in acidic water because of
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(A)
the formation of unionized fatty acid.
4
The following compounds are condensation polymers except
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(D)
polyethene
5
What amount of electricity is required to deposit one mole of aluminium from a solution of AlCl3?
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(C)
Three Faradays
6
Which of the following compounds would react rapidly with bromine?
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(C)
Hexene
7
Alkanols can be manufactured from alkenes by the initial reaction of alkenes with
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(B)
concentrated tetraoxosulphate(VI) acid
8
Which of the following statements about the standard hydrogen electrode is not correct?
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(D)
The temperature is kept at 20 °C
9
If 60 g of M combines with 24 g of oxygen, what would the empirical formula of the oxide be?
( molar mass of M = 120, O = 16)
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(C)
MO\(_{3}\)
10
The products of the electrolysis of dilute sodium chloride using carbon electrodes are
Anode Cathode
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(B)
oxygen and hydrogen.
11
Determine the quantity of electricity used when a current of 0.20 amperes is passed through an electrolytic cell for 60 minutes.
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(D)
720C
12
Oxochlorate(I) acid is used as a bleaching agent because it is
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(C)
an oxidizing agent
13
The IUPAC name for CH\(_{3}\)CHCH\(_{3}\)CHCLCHCH\(_{3}\)CH\(_{2}\)CH\(_{3}\) is
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(D)
3 - chloro - 2, 4 - dimethylhexane
14
A colourless gas with a pungent smell is evolved when dilute hydrochloric acid is added to a sample of a salt. The gas evolved could turn
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(B)
acidified KMnO\(_{4}\) solution colourless
15
If 5.0 g of marble reacts with 25.0 cm3 hydrochloric acid, which of the following combinations has the fastest reaction rate?
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(C)
Powdered marble and 2.5 mol dm\(^{-3}\) HCl\(_{(aq)}\)
16
Increasing the temperature generally
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(B)
increases the solubility of a solid in a liquid but decreases the solubility of a gas in a liquid.
17
A white precipitate was formed when BaCl\(_{2(aq)}\) was added to an aqueous solution
of a salt X. The precipitate dissolved in dilute HCl with rapid effervescence. Salt X is likely to contain
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(B)
SO\(_{3}\) \(^{2-}\) ions
18
Before a reaction could take place, there should be
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(C)
breakage of bonds of reactants
19
Consider the following reaction equation:
CaO + SiO\(_{2}\) ------> CaSiO\(_{3}\)
Silicon(IV) oxide is acting as
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(C)
an acidic oxide
20
Which of the following acids would form normal salt only?
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(B)
Trioxonitrate(V) acid
21
What is the partial pressure of oxygen at s.t.p. in a gaseous mixture containing 100 cm3 of oxygen and 900 cm3 of nitrogen gas?
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(B)
0.1 atm
22
Graphite is used as a dry lubricant due to the presence of
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(D)
layered structures
23
Which of the following gases is alkaline?
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(C)
NH\(_{3}\)
24
Which of the following statements about an equilibrium system is correct?
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(A)
Forward and backward reactions occur
at the same rate
25
Consider the following reaction equation
N\(_{2}\)(g) + 3H\(_{2(g)}\) ⇌ 2NH3(g) ∆H = -92kJ
Increasing the temperature of the reaction would
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(D)
decrease the yield of ammonia
26
When air in a syringe is compressed such that there is no change in temperature, the
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(B)
pressure increases
27
Which of the following statements about liquids is/are true?
I. Liquids maintain their volume at constant temperature.
II. Liquids have fixed shape
III. Liquids do not diffuse
IV. Change in pressure affects volume of liquids
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(A)
I only
28
A hydrogen chloride gas reacted with oxygen gas to yield water and chlorine gas. The mole ratio of the hydrogen chloride gas to water is
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(B)
2:1
29
What number of moles of oxygen would exert a pressure of 10 atm at 320 K in an 8.2 dm\(^{3}\) cylinder?
[R=0.082 atm dm\(^{-3}\) mol\(^{-1}\) K\(^{-1}\)]
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(C)
3.13
30
If 50 cm\(^{3}\) of a saturated solution of KNO\(_{3}\) at 40 °C contained 5.05 g of the salt, its solubility at the same temperature would be
[KNO\(_{3}\) = 101]
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(A)
1.0 mol dm\(^{-3}\)
31
Which of the following elements would displace copper from a solution of copper ions?
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(C)
lead
32
What is the percentage composition of carbon
in Ca(HCO3)\(_{2}\) ?
[ Ca = 40.0, 0= 16.0, C = 12.0, H= 1.0]
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(B)
14.8%
33
Which of the following bond types is intermolecular?
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(B)
Hydrogen bond
34
The maximum number of covalent bonds formed by nitrogen is
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(D)
4
35
The IUPAC name of the compound CH3CH(CH3)CHCH2 is
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(C)
3 - methyl but - 1 - ene
36
Ionization energy increases across the period in the periodic table because
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(B)
effective nuclear charge increases
37
Which of the following properties indicate that an element is a metal. It
I. reacts with oxygen to form an acidic oxide
II. forms ionic chlorides
III. has variable oxidation states
IV. displaces hydrogen from dilute HCl
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(C)
II and IV only
38
The electron configuration of carbon atom in its excited state is
