testing for gases

This test tube may contain Hydrogen. How could we test for this?

• Insert a glowing splint

• Insert a lit splint

• Insert a delivery tube

• Use litmus paper

What colour does litmus paper turn in the presence of chlorine?

• Red

• Blue

• White

• Yellow

How do you test for oxygen?

• Use a lit splint

• Use a glowing splint

• Use litmus paper

• Use a delivery tube

Ink can be separated by a method of -----------------------------------------------

• distillation

• filtration

• chromatography

• sedimentation

chromatography separate the mixture of dyes on the basis of their ----------------------------

• density
• solubility
• gravity
• boiling point

Why must the base line be drawn in pencil and not pen?

• a) Pencil is good at keeping substances in place.
• b) Pencil is soluble in water
• c) Pencil is insoluble in water
• d) Pencil is not coloured

Tags

NGSS.HS-PS2-6

 If a substance is not attracted to the water what happens to the 'dot'?

• a) Dot moves to the top of the paper
• b) Dot does not move at all
• c) Dot moves to the left or right
• d) Dot moves down to the bottom of the paper

In paper chromatography, the MOST soluble solute .......

• does not move from the start point
• stays closest to the start point
• travels furthest away from the start point
• can be found in the middle of the chromatogram

In chromatography, if a solute does not separate and remains on the start line ....

• the solute is insoluble in the solvent
• the solute is soluble in the solvent
• the solvent is insoluble in the solute
• the solvent is soluble in the solute

5. How do you test for Carbon Dioxide gas?

• a) Lime water goes milky/cloudy
• b) Relights a glowing splint
• c) Lighted splint gives a squeaky pop.
• d) Bleaches damp indicator paper.