Laden....
|
Druk & Houd Vast om te Verslepen |
|||
|
Klik hier om te sluiten |
|||
Vraag 1 Verslag
The relationship between equilibrium constant and free energy change is represented as
Antwoorddetails
Vraag 2 Verslag
The rate of a reaction usually increases with increase in the concentration of reactants because the
Antwoorddetails
Vraag 5 Verslag
How many atoms of chlorine are required to saturate the double bonds of a compound containing a triene?
Antwoorddetails
Vraag 6 Verslag
Which of the following gases is absorbed from the air dun photosynthesis?
Antwoorddetails
Vraag 9 Verslag
Which of the following statements is NOT correct of group VII elements? They
Antwoorddetails
Vraag 16 Verslag
The reaction of an alkanol with alkanioc acid is known as
Vraag 17 Verslag
Two elements X and Y with electronic configurations 2,8,2 and 2,8,7 respectively, are likely to combine by _________bonding
Antwoorddetails
Vraag 20 Verslag
If the volume of a gas at 35°C is 60cm3, what would be its volume in cm3 at 273k?
Antwoorddetails
Vraag 21 Verslag
Compound with the general formula CnH\(_{2n+2}\) belong to the_______ group
Vraag 23 Verslag
A colourless gas with characteristics odour which dissolves in water to form an alkaline solution is
Antwoorddetails
Vraag 24 Verslag
\( ^{235}_{92}U + ^1_0n → ^{145}_{56}Ba + ^{88}_{36}Kr + 3^1_0n + Energy \)
The equation above represent a/an
Antwoorddetails
Vraag 26 Verslag
The green house effect is a climatic condition associated with the presence of excess
Antwoorddetails
Vraag 27 Verslag
Which of the following salt solutions will have a pH greater than 7?
Antwoorddetails
Vraag 29 Verslag
The percentage composition of a hydrocarbon is 79.2 carbon 20.8 hydrogen. Calculate its empirical formula [H = 1, C = 12]
Antwoorddetails
Vraag 30 Verslag
The following compounds decolorize acidified potassium tetraoxomanganate (VII) solution EXCEPT
Antwoorddetails
Vraag 32 Verslag
When air is passed through alkaline pyrogallol and then lime water, the gases left are
Antwoorddetails
Vraag 33 Verslag
During the extraction of iron in the blast furnance, slag is produced using
Antwoorddetails
Vraag 34 Verslag
In the electrolysis of dilute tetraoxosulphate (VI) acid using platinum electrodes, the products obtained at the anode are cathode respectively are
Antwoorddetails
Vraag 35 Verslag
The scientist who discovered the zig-zag movement of gas molecules is
Antwoorddetails
Vraag 36 Verslag
What mass of copper in gram would be deposited by a current of 1.00ampere passing for 965 seconds through copper(II) tertraoxosulphate (VI) solution? [Cu 63.5; If = 96500c]
Antwoorddetails
Vraag 38 Verslag
What volume of carbon (IV) oxide in dm 3 is produced at s.t.p. when 2.50g of CaCO3 reacts with excess acid according to the following equation? CaCO3(s) + 2HCI(aq) → CaCl2(aq) + H2O(1) + CO2(g)
[CaCO2 100; molar volume of a gas at s.t.p. = 22.4dm 3]
Antwoorddetails
Vraag 39 Verslag
Sulphur has an oxidation number of +4 in
Vraag 40 Verslag
The empirical formula of a hydrocarbon containing 0.12 mole of carbon 0.3 mole of hydrogen is
Antwoorddetails
Vraag 44 Verslag
Brain tumors can be located by using an isotope of
Vraag 45 Verslag
C\(_6\)H\(_{12}\)O\(_6\)
What is the molar mass of the compound above?
[ H=1, C=12, O=16 }
Vraag 46 Verslag
The process involved in the decomposition of sugar by an enzyme is called
Vraag 47 Verslag
Which of the following compounds will undergo thermal dissociation?
Antwoorddetails
Wilt u doorgaan met deze actie?