What type of chemical reaction is combustion of natural gas?
(A) combination reaction
(B) decomposition reaction
(C) exothermic reaction
(D) dissolution reaction
An acid must contain mainly one atom which reacts with the metal to produce a gas.
(A) Hydrogen
(B) oxygen
(C) Nitrogen
(D) Ammonia
On heating copper powder in air, a layer of copper oxide accumulates on its surface. What is the color of this layer?
(A) Black
(B) White
(C) Yellow
(D) Brown
Herbs- The decomposition of vegetables into compost is an example of which reaction?
(A) endothermic
(B) exothermic
(C) substitution
(D) Amphibian
What type of acid is found in curd?
(A) lactic acid
(B) citric acid
(C) Oxalic acid
(D) Others
What is the pH value of sodium hydroxide?
(A) 11
(B) 12
(C) 13
(D) 14
Get the Examsbook Prep App Today