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Select Lessons (12)
CHEMISTRY OF THE ELEMENTS: Nitrogen
Chemistry Of The Elements: Sulphur
MATTER - PROPERTIES AND TRANSFORMATION: Acidic And Alkaline Solutions
MATTER - PROPERTIES AND TRANSFORMATION: Atomic Structure And The Periodic Table
MATTER - PROPERTIES AND TRANSFORMATION: Atoms
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry of Elements - Carbon
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry of Elements - Hydrogen
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry of Elements - Oxygen
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry of Elements - Phosphorus
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry of Elements - The Halogens
MATTER - PROPERTIES AND TRANSFORMATION: Structure And Bonding
5/72 MCQs for:
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry of Elements - Oxygen
Which gas is released when carbon dioxide (CO₂) is bubbled through water, and what is its effect on litmus paper?
No gas, turns red litmus blue.
Oxygen, turns red litmus blue.
No gas, blue litmus turns red.
No gas, turns blue litmus red.
Which of the following oxides, when dissolved in water, would turn blue litmus paper red?
Sulfur dioxide (SO₂).
Copper(II) oxide (CuO).
Magnesium oxide (MgO).
Sodium oxide (Na₂O).
Which of these oxides is generally insoluble in water and basic?
Nitrogen dioxide (NO₂).
Iron(III) oxide (Fe₂O₃).
Carbon dioxide (CO₂).
Sulfur dioxide (SO₂).
When magnesium oxide (MgO) is added to water, and the solution is tested with red litmus paper, what color change is observed?
Red to blue.
No change (remains red).
Red to yellow.
Red to colorless.
Which laboratory apparatus is commonly used to collect oxygen gas by downward displacement of water?
Gas syringe.
Beaker.
Trough of water and gas jar.
Measuring cylinder.
