PCL5(g)= PCL3(g) + Cl2(g)
In the reaction above, a decrease in pressure will
Decelerate the reaction
Increase yield of Pcl3
Increase the yield of Pcl5
Accurate the reaction
Correct answer is B
If we decrease the pressure in the reaction, there will be rapid breakage spilling of pcl5. And these follows a principle that molecule of gases tends to move from a region of higher pressure to low pressure. Option A,C,D will not be affected by pressure decrease
According to the kinetic theory an absence in temperature causes the kinetic energy of particles to
decrease
increase
remain constant
be zero
Correct answer is D
No explanation has been provided for this answer.
The furring of kettles is caused by the presence of what compound in water?
calcium tetraoxosulphate (IV)
calcium hydrogentrioxocarbonate (IV)
calcium hydroxide
calcium trioxocarbonate (IV)
Correct answer is D
Calcium hydrogen carbonate, often present in temporary hard water, is boiled in a kettle to remove the hardness. In the process, a scale forms on the inside of the kettle in a process known as furring of kettles. This scale is composed of calcium carbonate.
Which of the following results in the fall of acid rain?
oxide of lead
particulate matter
oxides of sulphur
gaseous hydrocarbon
Correct answer is C
Oxide of sulphur is formed as a result of acid rain. Options A,B, D are not formed as a result of the pressure of acid
NH3(g) + HCl(s) → NH 4Cl (s)
The entropy change in the system above is
positive
zero
negative
intermediate
Correct answer is C
Entropy s is a measure of the degree of disorder or randomness of a substance. The entropy charge in the system is negative. Options B, C, D will not give negative but the result into positive