Chemical Changes and Reactions Quiz

How can you identify a chemical reaction?

• A precipitate is formed

• Bubbles of gas are given off

• A color change occurs

• All of these

Tags

NGSS.MS-PS1-2

What is a precipitate?

• A gas given off during a reaction

• A color change in a reaction

• An insoluble product formed in a reaction

• A compound formed in a reaction

How can you test for the presence of hydrogen gas?

• A yellow precipitate is formed

• Carbon dioxide turns lime water milky

• Glowing splint re-ignites in oxygen

• Gas burns with a squeaky pop sound

What happens when magnesium burns in air?

• A gas is given off

• A color change occurs

• A precipitate is formed

• Magnesium oxide is formed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

What is the chemical formula for carbon dioxide?

• CO₂

• HCl

• O₂

• H₂O

Tags

NGSS.MS-PS1-1

A bee sting has a pH of 2, suggest the pH of a solution to neutralise the bee sting.

• pH 4

• pH 12

How can you test for the presence of oxygen gas?

• A yellow precipitate is formed

• Carbon dioxide turns lime water milky

• Glowing splint relights

• Gas burns with a squeaky pop sound

Antacids are indigestion tablets contain a/an..............................to neutralise the stomach acid.

Solution of pH 7 is..................

• an acid

• a base

• neutral

• none of these

When two colourless solutions, Lead Nitrate and Potassium Iodide are mixed together it forms

Potassium Nitrate (soluble) and Lead Iodide (insoluble). Identify the precipitate.

 

• Potassium Nitrate

• Lead Iodide

• Both are precipitates

• No precipitate is formed

Tags

NGSS.MS-PS1-2