A powder is placed into a bunsen burner flame. The colour of the flame is red. The ion is

• Na
• Li+
• Cu2+
• Ca

A powder is placed into a bunsen burner flame. The colour of the flame is orange. The ion is

• Na+
• Li+
• Ca2+
• K+

Silver nitrate and Nitric acid were mixed with an unknown solution. A cream ppt formed. The formula of the ion present is

• I-
• Br+
• Br-
• Cl+

Tags

NGSS.HS-PS1-1

Silver nitrate and Nitric acid were mixed with an unknown solution. A yellow ppt formed. The formula of the ion present is

• I2
• I+
• I-
• Br-

NaOH is added to an unknown solution. A orange-brown ppt forms. The formula of the ion is:

• Fe2+
• Fe3+
• Cu2+
• Cl-

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How do you test for carbon dioxide gas?

• Turns limewater milky
• Relights a glowing splint
• Makes a squeaky pop with a splint
• Bleaches damp litmus paper

How do you test for oxygen gas?

• Makes a squeaky pop with a lit splint
• Relights a glowing splint
• Bleaches damp litmus paper
• Turns limewater milky

How do you test for Chlorine gas?

• Bleaches damp litmus paper
• Makes a squeaky pop with a lit splint
• Relights a glowing splint
• Turns limewater milky

Li+ produces what colour flame?

• Yellow
• Green
• Lilac
• Orange

Br- stands for

• Bromine
• Bromine atom
• Bromide
• Bromium