Question : Dry ice is the solid form of:
Option 1: Air
Option 2: Carbon Dioxide
Option 3: Nitrogen
Option 4: Water
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Correct Answer: Carbon Dioxide
Solution : The correct answer is Carbon Dioxide.
The formation of dry ice, solid Carbon Dioxide (CO2), is based on the principles of sublimation and temperature. Carbon dioxide undergoes pressurization and cooling, transitioning directly from a gas to a solid through sublimation. This occurs at around -78.5 degrees Celsius (-109.3 degrees Fahrenheit). The resulting solid CO2, known as dry ice, is collected and compressed into blocks or pellets.
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Question : The gas used to extinguish fire is
Option 1: Neon
Option 2: Nitrogen
Option 3: Carbon dioxide
Option 4: Carbon monoxide
Question : The five key indicators of global climate change of our planet are:
Option 1: Antarctic Sea ice, Oxygen, Rainfall, Drought, and sea level
Option 2: Sea - level, Rising temperature, Rainfall, Nitrogen, and Arctic sea ice
Option 3: Arctic sea ice, Carbon dioxide, Global temperature, Sea level, and Land ice
Option 4: None of these
Question : The gas dissolved in water that makes it basic is:
Option 1: Ammonia
Option 2: Sulphur Dioxide
Option 3: Hydrogen
Option 4: Carbon Dioxide
Question : Haemoglobin has highest affinity for
Option 1: Oxygen
Option 2: Carbon dioxide
Option 3: Carbon monoxide
Option 4: Nitrogen
Question : When Hydrogen starts burning in air ,it produces?
Option 2: water
Option 3: Methane
Option 4: Carbon dioxide
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