HNO3 does not usually react with metals to liberate hydrogen because HNO3 is
a strong acid
a corrosive acid
an oxidizing agent
a nitrating agent
Correct answer is C
This is because nitric acid is a strong oxidizing agent. When it reacts with metals it tends to oxidize the metal but the hydrogen in it does not get reduced to hydrogen gas.
Which of the following statements is not a postulate of the kinetic theory of gases?
Molecules move with the same speed
intermolecular forces are negligible
Molecules are in a state of constant random motion
collision between molecules is elastic
Correct answer is A
No explanation has been provided for this answer.
When X is heated with manganese (IV) oxide, oxygen is produced X is
KCI
KCIO3
CaCO3
ZnCO3
Correct answer is B
No explanation has been provided for this answer.
Which of the following factors does not affect the rate of reaction of CaCO3 with HCI?
temperature of the reaction
solubility of the CaCO3
concentration of the HCI
surface area of the CaCO3
Correct answer is B
No explanation has been provided for this answer.
The activation energy of a reaction can be altered by
adding a reducing agent
applying a high pressure
using a catalyst
changing the temperature
Correct answer is C
No explanation has been provided for this answer.