Which of the following gives a precipitation when treated with NaOH Solution?
AlCl3
NH4Cl
Na2CO3
CH3COONa
Correct answer is A
AlCl3 will give a precipitate when treated with solution. Option B,C,D will not give a precipitate when treated with NaOH solution
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.
What is the relationship between demand and supply in agriculture?
Demand in agriculture is independent of supply
Demand and supply in agriculture are interdependent
Supply in agriculture is determined solely by demand
Demand and supply in agriculture are unrelated
Correct answer is B
In agriculture, demand and supply are interdependent factors. Demand refers to the quantity of agricultural products that consumers are willing and able to purchase at a given price. Supply, on the other hand, refers to the quantity of agricultural products that producers are willing and able to offer for sale at a given price. The relationship between demand and supply is often represented by the concept of market equilibrium.