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When sugar is dissolved in tea, the reaction is always accomplished by
CO(g) + H2O(g) → CO2(g) + H2(g)
From the reaction above, calculate the standard enthalpies of formation if CO2(g), H2O(g) and CO(g) in kJ mol-1 are -394, -242, and -110 respectively.
In the electrolysis of a concentrated solution of sodium chloride using electrodes, which of the following ions are discharged at the cathode and anode respectively?
When at equilibrium, which of the reactions below will shift to the right if the pressure is increased and the temperature is kept constant?
If y is an oxidizing agent that reacts with a reducing agent, Z, which of the following is correct?
Which of the following will change when a catalyst is added to a chemical reaction?
The commonest feature of reactions at the anode is that
If an equilibrium reaction has ΔH > 0, the reaction will proceed favourably in the forward direction at
A change in temperature of a saturated solution disturb the equilibrium between the
When 10g of sodium hydroxide is dissolved in 1000cm\(^3\) of water, the sodium formed is approximately
[Na = 23, H = 1, O = 16]
Farmlands affected by crude-oil spillage can be decontaminated by
A liquid that will dissolve fat is?
The structural component that makes detergent dissolve more quickly in water than soap is
Which of the following ions is acidic?
A consequence of global warming is?
The weakest attractive force that can be observed between two molecules is
When cathode rays are deflected onto the electrode of an electrometer, the instrument becomes
A gas exerts pressure on its container because
I. H = 1S\(^1\) II. N = 1S\(^2\) 2S\(^2\)2P\(^3\) III. O = 1S\(^2\) 2S\(^2\) 2P\(^4\) IV. Zn = 1S\(^2\) 2S\(^2\) 2P\(^6\) 3S\(^2\) 3P\(^6\) 4S\(^2\) 3d\(^{10}\)
From the above, which of the following pairs is like to be paramagnetic?