A reversible reaction
A spontenous reaction
An endothermic reaction
An exothermic reaction
Correct answer is D
In salts for which the hydration energy is higher than the lattice energy, solvation occurs with a release of energy in the form of heat. A reaction in which there is a release of energy as LIGHT OR HEAT is EXOTHERMIC.
The gas that is used for the treatment of cancer is
Neon
Radon
Xenon
Argon
Correct answer is B
No explanation has been provided for this answer.
0.056dm3
0.224dm3
224.000dm3
56.000dm3
Correct answer is A
Q = 193 x 5 = 965C
40H \(\mapsto\) 2H2O + O2 + 4e
4 x 96500C = 22.4dm3
965C = x
x = \(\frac{22.4 \times 965}{4 \times 96500}\)
= 0.056dm3
An isotope has an atomic number of 15 and a mass number of 31. The number of proton it contains is
16
15
31
46
Correct answer is B
No explanation has been provided for this answer.
An example of a solid emulsion is
Butter
Hair cream
Milk
Cod-liver oil
Correct answer is A
No explanation has been provided for this answer.