Which of the following is NOT an alkali?
NH3
Mg(OH)2
Ca(OH)2
NaOH
Correct answer is B
No explanation has been provided for this answer.
How many cations will be produced from a solution of potassium aluminium tetraoxosulphate (VI)?
3
4
1
2
Correct answer is D
No explanation has been provided for this answer.
CH3COOH(aq) + OH-(aq) ↔ CH3COO-(aq) + H2O(l)
In the reaction above ,CH3COO-(aq) is
conjugate base
acid
base
conjugate acid
Correct answer is A
No explanation has been provided for this answer.
N2O4(g) ↔ 2NO2(g) ΔH = +ve
In the reaction above, an increase in temperature will
increase the value of the equilibrium constant
decreases the value of the equilibrium constant
increase in the reactant production
shift the equilibrium to the left
Correct answer is A
No explanation has been provided for this answer.
Which of the following noble gases is commonly found in the atmosphere?
Xenon
Neon
Helium
Argon
Correct answer is D
Argon, with the symbol Ar which is the third noble gas, in group 18 makes up about 1% of the Earth's atmosphere, making it the most common noble gas on Earth.