Which of the following is a semiconductor? A. Si B. Ag C. Cu D. Fe Which one of the following concentration unit does not depend on temperature? A. Normality B. Molarity C. Molalit... Which of the following is a semiconductor? A. Si B. Ag C. Cu D. Fe Which one of the following concentration unit does not depend on temperature? A. Normality B. Molarity C. Molality D. All of these What is soda water? A. Solution of CO2 gas in water B. Solution of CO2 gas in gas C. Solution of water in solid D. All of these What is engaged in making a statement for lead? A. PbO B. PbO2 C. Pb3O4 D. PbSO4
Understand the Problem
The question is asking to identify a semiconductor from a list of metals, inquire about a concentration unit related to temperature, explain what soda water is in terms of its composition, and identify certain compounds related to lead. The approach will involve selecting the correct options based on scientific knowledge.
Answer
["Si","Molality","Solution of CO2 gas in water","Pb3O4"]
["1. Si","2. Molality","3. Solution of CO2 gas in water","4. Pb3O4"]
Answer for screen readers
["1. Si","2. Molality","3. Solution of CO2 gas in water","4. Pb3O4"]
More Information
Silicon (Si) is widely used in semiconductors due to its electronic properties. Molality is independent of temperature because it is based on the mass of the solvent, not volume. Soda water is a solution of CO2 gas in water, commonly seen as carbonated water. Pb3O4 (red lead) is used for protective coatings.
Tips
For concentration units, remember that those relying on volume (e.g., molarity) are temperature-dependent, while those on mass are not.
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