Practice every past-year question.

1. A
   $CO_2$
2. B
   $O_2$
3. C
   NaOH
4. D
   $HNO_3$

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1. A
   acetic
2. B
   lactic
3. C
   tartaric
4. D
   hydrochloric

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1. A
   changes
2. B
   mutation
3. C
   disability
4. D
   translocation

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1. A
   vas deferens
2. B
   ejaculatory duct
3. C
   testes
4. D
   urinogenital duct

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1. A
   Chemical
2. B
   Solar
3. C
   Mechanical
4. D
   Electrical

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