Exothermic reactions

The other term used for burning is:

• flammable

• inflammable

• combustion

• none

Carbon + Oxygen = (a)  

When magnesium ribbon burns in the presence of oxygen it produces:

• magnesium iodide

• magnesium chloride

• magnesium oxide

• none

The combustion of hydrogen is (a)   reaction.

When iron rusts, it combines with (a)   .

Sara is reacting sulfuric acid with magnesium ribbon, the reaction is exothermic. What preliminary measure she should take to identify it as exothermic reaction?

• she will use a pair of tongs

• she will use a thermometer to record temperature

• she will not record temperature

• none

Jazim and Farhan react metal X and Y with 10 ml hydrochloric acid in two test tubes. The reaction of Y metal is vigorous producing more heat. What can you conclude?

• Metal Y is more reactive

• Metal X is more reactive

• both

• none

magnesium + sulfuric acid = (a)   + hydrogen

Fuels store energy in the form of _______________ energy.

• kinetic

• potential

• chemical

• none

Ali is putting ice cubes in a glass at room temperature, which reaction it will be?

• exothermic

• endothermic

• both

• none