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Two colourless gases on mixing formed de...

Two colourless gases on mixing formed dense white fumes. These are :

A

`NH_(3) " and " SO_(2)`

B

`SO_(2)` and steam

C

`NH_(3) " and " HCl`

D

`NH_(3) " and " HNO_(2)`

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To solve the question regarding which two colorless gases form dense white fumes upon mixing, we can follow these steps: ### Step 1: Identify the gases We need to consider the options provided: 1. NH3 (Ammonia) and SO2 (Sulfur Dioxide) 2. SO2 and steam (Water vapor) 3. NH3 (Ammonia) and HCl (Hydrochloric Acid) 4. NH3 (Ammonia) and HNO2 (Nitrous Acid) ### Step 2: Analyze the reactions We need to analyze the reactions between these gases to see which combination produces dense white fumes. - **NH3 and SO2**: When ammonia and sulfur dioxide react, they do not produce dense white fumes. - **SO2 and steam**: The combination of sulfur dioxide and steam does not yield any visible fumes. - **NH3 and HCl**: When ammonia (NH3) reacts with hydrochloric acid (HCl), they form ammonium chloride (NH4Cl), which is a white solid that can appear as dense white fumes. - **NH3 and HNO2**: Ammonia and nitrous acid do not produce dense white fumes. ### Step 3: Conclusion From the analysis, the only combination that produces dense white fumes is NH3 and HCl, which forms ammonium chloride. ### Final Answer The two colorless gases that form dense white fumes upon mixing are **NH3 (Ammonia) and HCl (Hydrochloric Acid)**. ---
To solve the question regarding which two colorless gases form dense white fumes upon mixing, we can follow these steps: ### Step 1: Identify the gases We need to consider the options provided: 1. NH3 (Ammonia) and SO2 (Sulfur Dioxide) 2. SO2 and steam (Water vapor) 3. NH3 (Ammonia) and HCl (Hydrochloric Acid) 4. NH3 (Ammonia) and HNO2 (Nitrous Acid) ...
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