chemical equations

Question 1

magnesium ribbon burns in what colour flame?

Answer 1

white

Question 2

magnesium burns to form what

Answer 2

magnesium oxide

Question 3

magnesium ribbon should be cleaned with what

Answer 3

sandpaper

Question 4

zinc reacts with what for the temperature to increasue

Answer 4

sulphuric acid or hydrochloric acid

Question 5

how to determine if chemical reactions took place

Answer 5

change in colour change in temperature change in state evolution of gas

Question 6

what is a combination reaction?

Answer 6

when two or more reactants combine to form one product it is called a combination reaction

Question 7

what is an exothermic reaction?

Answer 7

a reaction in which heat is generated is called an exothermic reaction

Question 8

is respiration an exothermic or an endothermic reaction?

Answer 8

it is as exothermic reaction

Question 9

what is decomposition reaction?

Answer 9

when a reactant breaks down to give simpler products it is called decomposition reaction

Question 10

what acid is added to water to perform electrolysis?

Answer 10

sulphuric acid is added

Question 11

are decomposition reactions endothermic or exothermic?

Answer 11

endothermic

Question 12

what substance is used for whitewashing?

Answer 12

calcium oxide

Question 13

what should be there in the compound if its acidic

Answer 13

hydrogen

Question 14

what should be there in the compound if its basic

Answer 14

hydroxide

Question 15

stainless steel is an alloy of?

Answer 15

iron chromium carbon silicon manganese nickel

Question 16

brass composition

Answer 16

copper and zinc

Question 17

bronze composition

Answer 17

copper and tin

Question 18

duralumin composition

Answer 18

copper aluminium manganese and magnesium