12 Questions
What happens when a burning splinter is brought in contact with hydrogen gas?
The burning splinter extinguishes with a pop sound.
How is oxygen gas confirmed in a chemical reaction?
A glowing splinter will glow more brightly.
What gas is suspected when a colourless and odourless gas evolves with brisk effervescence upon adding metallic carbonate to dilute hydrochloric acid?
Carbon dioxide
What is the product of the chemical reaction between Zn and dilute HCl?
ZnCl2 + H2
What chemical reaction confirms the presence of ammonia?
NH4Cl + NaOH -> NaCl + H2O + NH3
How is the presence of ammonium salt and alkali confirmed?
2NH4Cl + Ca(OH)2 -> CaCl2 + 2H2O + 2NH3
What happens when moist blue litmus paper is brought in contact with an acidic gas?
The paper first turns red and finally bleaches it to white.
How can the presence of chlorine (Cl2) be suspected?
When oxidizing agents are heated, a greenish yellow colored gas with a pungent smell is evolved.
What happens when a few marble chips are added to a test tube containing dilute hydrochloric acid?
Effervescence of a gas is observed, confirming the presence of carbon dioxide.
How can you confirm the presence of carbon dioxide gas evolved in a chemical reaction?
Pass the evolved gas through lime water and observe the milkiness in the lime water.
Describe a test to identify the presence of sulphur dioxide gas.
Pass the evolved gas through acidified potassium dichromate solution and observe the green color change.
What is the chemical reaction involved in confirming the presence of sulphur dioxide using dilute sulfuric acid?
When dilute sulfuric acid is added to sodium bisulphite, sulphur dioxide gas is evolved.
Test your knowledge on chemical tests to identify gases based on their reactions with moist blue litmus paper, burning splinters, and more. Questions involve confirming the presence of hydrogen with a pop sound, identifying oxygen gas, and recognizing different gas reactions with specific chemicals.
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