ATI TEAS 7
Chemistry
1. What is the general formula for an alkene?
- A. CnH2n+2
- B. CnH2n
- C. CnH2n-2
- D. CnH2n+1
Correct answer: B
Rationale: The general formula for an alkene is \(C_nH_{2n}\), indicating the presence of a double bond between carbon atoms.
2. Which element is a good conductor of electricity but is not a metal?
- A. Copper
- B. Silver
- C. Graphite
- D. Gold
Correct answer: C
Rationale: While metals are known for their conductivity, some non-metals like graphite also exhibit this property due to their unique electronic structure
3. Which of the following types of muscle tissue is found attached to bones and allows for voluntary movement?
- A. Smooth muscle
- B. Cardiac muscle
- C. Skeletal muscle
- D. Connective tissue
Correct answer: C
Rationale: The correct answer is C: Skeletal muscle. Skeletal muscle is the type of muscle tissue that is attached to bones and allows for voluntary movement. This type of muscle is under conscious control, meaning we can choose to contract or relax these muscles to produce movement. Smooth muscle (option A) is found in the walls of internal organs and is not under voluntary control. Cardiac muscle (option B) is found in the heart and also functions involuntarily. Connective tissue (option D) primarily provides support and structure to the body but does not directly enable movement like skeletal muscle does.
4. What is the common name for the organic compound CH₃OH?
- A. Methane
- B. Ethanol
- C. Methanol
- D. Butanol
Correct answer: C
Rationale: CH₃OH is commonly known as methanol. The other choices represent different organic compounds.
5. A rectangular bandage measures 5cm by 8cm. What is the area covered by the bandage?
- A. 10cm
- B. 13cm
- C. 40cm^2
- D. 64cm^2
Correct answer: C
Rationale: 40cm^2: Multiply the length (5cm) by the width (8cm).
6. Repeating decimals can be expressed as fractions. Which of the following represents the decimal 0.7777... as a fraction?
- A. 77/1000
- B. 70/99
- C. 777/900
- D. 7/9
Correct answer: C
Rationale: Let x equal the decimal. Set up two equations such that the digits after the decimal point are identical. 1000x = 777.7777... 10x = 7.7777... Subtracting the two equations, we have 990x = 770. Dividing both sides by 990 gives us x = 770/990, which can be simplified to 77/90.
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