Exam 1 Spring 2010

1 a solid yellow substance a is heated to a high

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ight during the exams. 1. A solid yellow substance, A, is heated to a high temperature in the absence of air. It decomposes to form two new substances, B (a white solid) and C (a gas). The gas has the same properties as the gas formed when carbon is burned in an excess of air. Which one of the following statements about substances A, B and C is correct? (Choose the best answer.) A. B. Substance A is a compound, and B and C may be elements or compounds. C. All substances must be elements. D. 2. Substance A has to be a mixture and B and C elements. Substance A must be a compound, and B and C must both be elements. Which of the following describes a physical property? A. B. 3. Energy is released when oxygen reacts with hydrogen. Plant growth occurs in...
View Full Document

Ask a homework question - tutors are online