The reaction in which two or more substances combine to form a single compound is called …….reaction.
a) synthesis
b) displacement
c) double-displacement
d) combustion
Explanation:A combination reaction, also known as a synthesis reaction, is a reaction in which two or more substances combine to form a single new substance. Combination reactions can also be called synthesis reactions.The general form of a combination reaction is: A+B→AB
One combination reaction is two elements combining to form a compound. Solid sodium metal reacts with chlorine gas to product solid sodium chloride.2Na(s)+Cl2(g)→2NaCl(s)
Synthesis
reaction is also known as….reaction.
a) addition
b) displacement
c) double-displacement
d) combustion
Which of the following reaction takes place when carbon burns in air, combines with oxygen and produces carbon dioxide?
a) synthesis
b) displacement
c) double-displacement
d) combustion
Which of the following chemical equation shows synthesis reaction?
a) C(s) + O2(g) ------à CO2(g)
b) 2H2O2(l) -----à 2H2O(l) + O2(g)
c) 2MgO------à 2Mg + O2(s)
d) none of these
During electrical discharges in the atmosphere, nitrogen combines with……..to produce nitric oxide (NO).
a) water
b) hydrogen
c) oxygen
d) carbon
Which of the following is added to the vegetable oil to convert them into ghee and margarine?
a) water
b) hydrogen
c) oxygen
d) carbon
Explanation:Hydrogenation is a process that uses hydrogen gas to change a liquid vegetable oil into a hard spread/margarine. This process stabilizes the oil and prevents spoilage from oxidation.
