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The rate of a reaction usually decreases with a decrease in the concentration of reactants because
A catalyst speeds up the rate of chemical reaction by
Which of the following reaction is endothermic?
\(NH_{3(g)} + HCl_{(g)} → NH_4Cl_{(s)}\)
The entropy change in the system above is
If a given quantity of electricity liberates 0.65g of Zn2+, what amount of Hg2+ would be liberated by the same quantity of current?
[Zn = 65, Hg = 201]
In recharging a lead-acid accumulator, the reaction at the cathode can be represented as
What is the IUPAC nomenclature of the compound NaCIO?
The oxidation state of carbon in HCOOH is
Insoluble salts can be prepared by?
0.05 mol dm-3 HCl is neutralized by 25 cm3 NaOH. If the volume of acid used is 32.00cm3, what is the concentration of the base
The basicity of CH3COOH is
What is the pH of 0.001 mol dm-3 solution of sodium hydroxide
The uncovered raw food that is sold along major roads is likely to contain some amounts of
117.0g of sodium chloride was dissolved in 1.0dm3 of distilled water at 25°C. Determine the solubility in mol dm-3 of sodium chloride at that temperature
[Na = 23, Cl = 35.5]
The vulcanizer's solution is prepared by dissolving rubber in
When a few drops of water is added to a blue anhydrous cobalt (II) chloride, the colour changes to
In the course of purifying water for town supply the water is passed through large settlings tanks, containing sodium aluminate (III) to remove?
Air boiled out of water as steam is richer in
\( _{11} ^{23}Na + _0^1n → _{11}^{24}Na \)
The reaction above is an example of
In the periodic table, the electrical and thermal conductivities are properties of elements that