SABIS Grade 11 Term 1 Week 5 Lesson 10

​Lesson 10 SA Gr11

Lesson includes

Online quiz ch 2 Questions 1-10

​Explain Chapter 2 (2.3.2 and 2.3.3)

Course rev Q Ch 2(13-16)​

Multiple Choice

HCl reacts with metals such as magnesium or zinc to produce a colorless and odorless gas A . when a lit splint is inserted into a test tube containing gas A , a pop sound is heard give the formula of A

• O₂

• H₂

• Cl₂

• CO₂

Multiple Choice

Three different gases are introduced in a container , a moist litmus paper is bleached when inserted into the flask

choose the correct answer to complete the sentence below

that gas that bleaches the litmus paper is

• H₂

• O₂

• Cl₂

• CO₂

Multiple Choice

An experiment released a colourless gas which rekindles glowing wooden splinter. The gas released is........

• Carbon dioxide

• Hydrogen

• Nitrogen

• Oxygen

Multiple Select

Which of the following is correct observation for the gas released?

• Turns moist blue litmus paper into red

• Turns moist red litmus paper into blue

• Greenish-yellow gas

• Pungent smell

Multiple Choice

Reaction between solution X and substance Y produce a greenish-yellow gas. The gas is most possible .............

• Sulphur dioxide gas

• Chlorine gas

• Nitrogen dioxide gas

• Hydrogen chloride gas

Multiple Choice

A reaction between solution A and substance B produce a colourless gas. The gas release turns the lime water into cloudy. The gas is ........

• nitrogen dioxide

• carbon monoxide

• sulphur dioxide

• carbon dioxide

Multiple Select

Chlorine gas.......

• is acidic

• will turn damp blue litmus red then bleach it white

• is alkaline

• will turn damp red litmus blue

Multiple Select

Ammonia gas.......

• is acidic

• will turn damp blue litmus red then bleach it white

• is alkaline

• will turn damp red litmus blue

Multiple Choice

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

• Fe2+
• Fe3+
• Cu2+
• Cl-

Multiple Choice

Limewater in diagram turns cloudy.

What is the gas released?

• Hydrogen

• Oxygen

• Carbon dioxide

• Ammonia

Multiple Choice

Nitrogen dioxide gas is ....

• Acidic

• Neutral

• Alkaline

add few drops of silver nitrate and few drops of nitric acid diluted to the test tube​,the color of the precipitate differs according to the ion found.

​Testing for some common ions

Testing for Cl^- Br^- I^-

​

Match

Match the following Colors of precipitate to the ion in the solution

Silver Iodide

AgI

Silver Bromide

AgBr

Silver Chloride

AgCl

• Silver Iodide

  AgI

• Silver Bromide

  AgBr

• Silver Chloride

  AgCl

add few drops of Barium nitrate a white precipitate will form that does not dissolve in HCl

​Testing for some common ions

Testing for SO₄^2-

​

Multiple Choice

Testing for SO₄^2-

Add few drops of Barium nitrate a ........ precipitate will form that does not dissolve in HCl means that there is sulphate ion present

• Yellow

• creamy

• white

• Dark yellow

When bubbled through lime water it turns the water cloudy

​Testing for some common ions

Testing for CO₃^2-

​

Multiple Choice

The test for carbon dioxide is ...

• It will cause a squeaky pop

• It will explode

• When bubbled through lime water it turns the water cloudy

• it will make a damp litmus paper turn from red to blue color

Fill in the Blank

A solution produces:

A blue precipitate when dilute sodium hydroxide is added and

a white precipitate when hydrochloric acid and barium chloride is added

What is the name of the solution being tested?

Multiple Choice

Cations are positively charged ions, anions are negatively charged ions

• True

• False

Flame colours of

Li⁺ (red),

Na⁺ (yellow),

K⁺ (lilac),

Ca²⁺ (brick red),

Ba²⁺ pale green) and

Cu²⁺(blue-green).

K-Chemistry.com

Flame test Results

​

Multiple Select

To test for Sulfite ion SO₃^2-

add drops of dilute nitric acid and the gas produced

• it turns the litmus paper color from blue to red

• It has a choking smell

• The gas produced is SO₂

• The gas produced is colorless

​To test for Sulfite ion SO₃^2-

add drops of dilute nitric acid and the gas produced

• The gas produced is SO₂

• it turns the litmus paper color from blue to red

• It has a choking smell​

• The gas produced is colorless

Reorder

Reorder the following

Test for NO₃^-

• Add few drops of NaOH and aluminium powder and heat gently

• A gas is produced with effervescence

• place a damp red litmus paper on the gas produced which turns blue showing the gas produced in Ammonia gas

1

2

3

• 1
• 2
• 3

Multiple Choice

Testing for ......? ^Ions

Add few drops of sodium sulphate a white precipitate will form that does not dissolve in HCl

• Silver

• Barium

• Zinc

• Ammonium

Add few drops of sodium carbonate a white precipitate forms that dissolves in HCl

A brick red color forms with a flame test​

A few drops of NaOH produces a white precipitate that does not dissolve in excess of NaOH​

Tests for Calcium ions Ca²⁺

Multiple Choice

A solution is known to contain Pb(NO₃)₂ and Ba(NO₃)₂

Which of the following is added to remove the lead(II) ions Pb²⁺ from the solution without removing the barium ions Ba²⁺

• Na₂CO₃

• K₂SO₄

• HNO₃

• NaBr

Multiple Choice

The solubility of barium nitrate BaNO32 at 60 degrees C is 20.0 g/100 g of solution and at 100 degree C is 32.0 g/100 of solution.

What mass of Ba(NO3)2 crystals will form if 400 g of a saturated aqueous solution of barium nitrate is cooled from 100 degrees to 60 degrees C

• 36.0

• 156.0

• 12.0

• 48.0

• 52.0

Multiple Choice

Determine if the following salt is soluble or insoluble

Na₂SO₄

• Soluble

• Insoluble

Multiple Choice

Determine if the following salt is soluble or insoluble

AgCl

• Soluble

• Insoluble

Multiple Choice

Determine if the following salt is soluble or insoluble

BaSO4

• Soluble

• Insoluble

Multiple Choice

Determine if the following salt is soluble or insoluble

KF

• Soluble

• Insoluble

Multiple Choice

Determine if the following salt is soluble or insoluble

PbCl2

• Soluble

• Insoluble

Multiple Choice

Determine if the following salt is soluble or insoluble

Ba(NO₃)₂

• Soluble

• Insoluble

Fill in the Blank

A few drops of NaOH solution were added to a test tube containing solution X and shaken 

The solution showed a blue suspension then it turned to a darker blue solution upon adding ammonia NH3

Fill in the blank by the chemical symbol of the ion

This observation infers that solution X contains the ion

Multiple Choice

Lithium Flame Test?

• red

• orange

• yellow

• green

Multiple Choice

Barium flame test?

• red

• yellow

• orange

• Green

Multiple Choice

A lilac color of light was seen when this element was heated in the flame.

• sodium

• barium

• potassium

• copper