Types of Chemical Reactions and Symbolic Representation

Which observation can help determine whether a chemical reaction has taken place?

What substance is produced when a magnesium ribbon is burnt in oxygen?

In Activity 1.3, when lead nitrate solution is mixed with potassium iodide solution, what is observed?

What is the symbolic representation of the reaction where magnesium reacts with oxygen to form magnesium oxide?

Which of the following substances are the reactants in the reaction where magnesium reacts with oxygen?

What can be inferred if there is an evolution of gas during a chemical reaction?

What precaution is mentioned in the text for the Activity involving burning a magnesium ribbon?

In the context of chemical reactions, which of the following observations is NOT listed as a potential indicator of a chemical reaction in the text?

According to Martin H. Fischer's quote provided in the text, what comparison is made between facts and science?

What is the purpose of burning the magnesium ribbon away from eyes as mentioned in the text?

Which of the following elements is involved in the formation of hydrogen gas by the action of dilute sulphuric acid on zinc as shown in Figure 1.2?

What is the symbolic representation of the chemical reaction between zinc granules and dilute hydrochloric acid?

What temperature change is expected when lead nitrate solution is mixed with potassium iodide solution?

Which type of chemical reaction occurs when a magnesium ribbon is burnt in oxygen to form magnesium oxide?

What is the word equation for the formation of magnesium oxide when a magnesium ribbon reacts with oxygen?

In a chemical equation, what do the reactants represent?