Nkojọpọ....
|
Tẹ mọ́ & Dì mú láti fà yíká. |
|||
|
Tẹ ibi lati pa |
|||
Ibeere 2 Ìròyìn
Which of the following is TRUE of a catalyst? I. it alters the activation energy of a reaction
II. it is effective in a reaction but cannot initiate a reaction
III, it affects the equilibrium of a reversible reaction
IV. it affects the overall reaction
Awọn alaye Idahun
Ibeere 4 Ìròyìn
Faraday s first law of electrolysis can be expressed mathematically as
Awọn alaye Idahun
Ibeere 6 Ìròyìn
The molar mass of a compound X is 56. its empirical formula is CH2. X is
Awọn alaye Idahun
Ibeere 8 Ìròyìn
How much sodium hydroxide is required to nka 250 cm3 ofa0.1 molar solution? Na=23; 0=16; H=1]
Awọn alaye Idahun
Ibeere 9 Ìròyìn
The Atomic theory model which explains that electrons in an atom revolve round quantized energy levels is attributed to
Awọn alaye Idahun
Ibeere 11 Ìròyìn
The maximum number of electrons that can occupy the shell having a principal quantum number of 3 is
Awọn alaye Idahun
Ibeere 13 Ìròyìn
What is the ratio of the rate of diffusion of carbon(IV) oxide to that of propane, under the same conditions? [H = 1; C= 12; 0= 161
Awọn alaye Idahun
Ibeere 15 Ìròyìn
When an electric current is passed through a solution containing dilute tetraoxosulphate (Vi) acid, 190 cm3 of hydrogen gas is evolved. if the measurements were made at 26°C and 736 mmHg, what is the volume of hydrogen at s.t.p.?
Awọn alaye Idahun
Ibeere 16 Ìròyìn
if an element X with atomic number 13 combines with an element Y whose atomic number is 8 the most likely formula of the compound formed between X and Y is?
Awọn alaye Idahun
Ibeere 17 Ìròyìn
The atomic number of iron is 56. The number of unpaired electrons in the Fe3+ ion is
Awọn alaye Idahun
Ibeere 19 Ìròyìn
An experiment to test the conductance of 0,1 M solutions of the substances listed below was perform.
I ammonia
II ammonium chloride
III ethanoic acid
IV sodium ethanoate
Which pair of substances show the least conductance?
Awọn alaye Idahun
Ibeere 20 Ìròyìn
Detergents are better than soaps for washing in hard water because
Awọn alaye Idahun
Ibeere 21 Ìròyìn
On exposure to hydrogen sulphide, moist lead (II) ethanoate paper turns
Awọn alaye Idahun
Ibeere 24 Ìròyìn
Ethanol is a product of fermentation of simple sugars. Which method is used to separate ethanol from the other products?
Awọn alaye Idahun
Ibeere 27 Ìròyìn
NaCl(s) does NOT conduct electricity, but N(aq) does. This is because
Awọn alaye Idahun
Ibeere 28 Ìròyìn
what dose the following equation illustrate? \( ^{238}U_{92} → ^{234}Th_{90} + ^4 He_2 \)
Awọn alaye Idahun
Ibeere 29 Ìròyìn
in any chemical reaction, the total mass of products is always equal to that of the reactants.
This Is statement of the law of:
Awọn alaye Idahun
Ibeere 30 Ìròyìn
Which compound is a product of the hydrolysis of the of CH3COOC3H7 with aqueous sodium hydroxide?
Awọn alaye Idahun
Ibeere 33 Ìròyìn
The green colour solution of an Fe2 salt changes to a brown solution of an Fe3+ salt by
Awọn alaye Idahun
Ibeere 36 Ìròyìn
The high boiling point of hydrogen fluoride can be explained in terms of
Awọn alaye Idahun
Ibeere 37 Ìròyìn
20 cm3 of 0.09 mol dm3 solution of tetraoxosuiphate (Vi) acid requires 30cm3 of sodium hydroxide solution for complete neutralization. The molar concentration of sodium hydroxide is [H = 1; S = 32; 0 = 16; Na = 23]
Awọn alaye Idahun
Ibeere 38 Ìròyìn
A gas X diffuse through porous partition at the rate of 3 cm3 per second. Under the same condition hydrogen diffused at the rate of 15 cm3 per second.
What is the 42. relative molecular mass of X.
Awọn alaye Idahun
Ibeere 39 Ìròyìn
A measure of the degree of disorderliness in a chemical system is known as the
Awọn alaye Idahun
Ibeere 40 Ìròyìn
The position of an element in the Periodic Table is determined by
Awọn alaye Idahun
Ibeere 41 Ìròyìn
To test for the presence of chloride ions in ion, correct sequence of reagents to use is
Awọn alaye Idahun
Ṣe o fẹ tẹsiwaju pẹlu iṣe yii?