When steam is passed over white-hot coke, the products are
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(B)
carbon (II) oxide and hydrogen
2
The maximum number of electrons that can accommodated in the shell having the principal quantum number 3 is
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(D)
18
3
Methanol is obtained from wood by
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(E)
destructive distillation
4
Study carefully the reaction represented by the equation below. 2H2O 2(l) → O 2(g) + 2H2O(l). Which of the following will not reaction increase the reaction rate?
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(D)
Adding water to the reactant
5
Which of the following processes is a physical reaction?
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(C)
Allotropic change
6
If the volume of a given mass of gas at 298 K and pressure of 205.2 x 10\(^3\) Nm\(^{-2}\) is 2.12dm\(^3\), what is volume of the gas at s.t.p? (Standard pressure = 101.3 x 10\(^3\) Nm\(^{-2}\), Standard temperature = 273K)
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(D)
3.93dm3
7
The following acids are monobasic except
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(C)
ethanedioic acid
8
The reactions ethyne are mainly
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(B)
addition reactions
9
When air is passed through potash and then pyrogallol, the components are noble gases,
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(C)
nitrogen and water vapour
10
The halide used widely in photography is
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(C)
silver bromide
11
The scum formed when soap is mixed with hard water could be
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(A)
calcium trioxocarbonate (IV)
12
What is the quantity of electricity produced when a current of 0.5A is passed for 5 hours 45 mins? (1F = 96500C)
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(A)
0. 11F
13
''The rate a reaction is proportional to the number of effective collisions occurring per second between the reactants''. This statement is associated with the
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(D)
collision theory
14
What is the following compounds will not decompose when heated strongly ?
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(B)
K2CO3
15
What is the change in the oxidation number of phosphorus in the the reaction represented by the following equation? 4P (s) + 5O(2)(g) → 2P2O5(g)
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(B)
0 to 5
16
When iron rusts, it undergoes
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(D)
redox reaction
17
Consider the compounds represented by the following general formula: X2SO4 Y2(SO4)3, 24H2OX and Y could respectively be
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(A)
K and AI
18
Which of the following involves the decomposition enzymic action?
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(B)
Fermentation
19
The following salts are readily soluble in water except
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(D)
CuCO3
20
When sucrose is warmed with Fehling's solution
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(D)
there is no precipitate
21
Which of the following gases will have the highest rate of diffusion under the same conditions? (H = 1, C =12, O = 16, S = 32, CI = 35.5)
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(A)
O2
22
The formula (CH3),3 COH is that of a
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(C)
tertiary alkanol
23
What is the number of oxygen atoms in 32g of the gas? (O = 16, L = 6.0 X 10\(^{23}\) mol\(^{-1}\))
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(B)
6.0 X 1023
24
Which of the following compounds is not correct about the reaction of sodium material for the manufacture of plastics?
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(B)
Ethane
25
The energy required to remove the most loosely bound electron from an atom in the gaseous state is known as the
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(B)
ionization energy
26
Vulcanization of rubber
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(D)
hardnes the rubber through cross-linkage
27
If a reaction is said to be exothermic, which of the following statements is a correct deduction from the information?
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(A)
the reaction vessel gets hotter as the reaction proceeds
28
If a reaction is said to be exothermic, which of the following statements is a correct deduction from the information?
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(A)
the reaction vessel gets hotter as the reaction proceeds
29
Which of the following statement is not correct about esterification?
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(C)
it is similar to hydrolysis
30
Which of the following statements is not correct? The 4s orbital
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(B)
is of higher energy than the 3d orbital
31
Which of the following pH values is likely to be that of a slightly alkaline solution?
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(D)
8
32
Which of the following minerals contains flurine as one of its constituent elements?
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(A)
Cryolite
33
The product of the reaction between propanoic acid and ethanol is
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(E)
ethylpropanoate
34
Which of the following groups contains entirely linear molecules?
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(D)
CO2H2N2
35
What is the value of n in the following equation? XO-4 +8H + + ne- → X2 + + 4H2O
