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

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

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