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AP Intermediate 1st Year Some Basic Concepts of Chemistry — practice questions — page 2

Explore 49 free Some Basic Concepts of Chemistry questions in AP Intermediate 1st Year Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Some Basic Concepts of Chemistry questions and exercises with answers

Showing questions 31–49 of 49.

Chemistry is described as the science of molecules and their:Read the answer and worked solution →At the bulk level, matter is classified as a pure substance or a:Read the answer and worked solution →A mixture may be heterogeneous or:Read the answer and worked solution →Sugar solution and air are given as examples of which kind of mixture?Read the answer and worked solution →The pure substances that form a mixture are called its:Read the answer and worked solution →The law of conservation of mass was put forth by Antoine:Read the answer and worked solution →In which year was the law of conservation of mass put forth?Read the answer and worked solution →The law of definite proportions was given by which French chemist?Read the answer and worked solution →The law of definite proportions is also referred to as the law of definite:Read the answer and worked solution →Who proposed the law of multiple proportions, in 1803?Read the answer and worked solution →In heterogeneous mixtures, the composition throughout is:Read the answer and worked solution →Carbon 12 is assigned a mass of exactly twelve atomic mass:Read the answer and worked solution →Significant figures are digits known with certainty plus one that is:Read the answer and worked solution →How many significant figures does 0.0052 have?Read the answer and worked solution →How many significant figures does 0.200 g have?Read the answer and worked solution →In numbers written in scientific notation, which digits are significant?Read the answer and worked solution →In multiplication, the result carries no more significant figures than the measurement with:Read the answer and worked solution →Uncertainty in an experimental value is indicated by mentioning the number of:Read the answer and worked solution →The number written to the left of a formula in a chemical equation is called a:Read the answer and worked solution →

Worked practice questions

Chemistry is described as the science of molecules and their:

  1. Transformations
  2. Transportations
  3. Transmissions
  4. Transplantations
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Correct answer: A. Transformations

1. Chemistry studies substances and what happens to them. 2. The second half of the definition is about change. 3. Chemistry is the science of molecules and their transformations. 4. So the answer is transformations. _Source: syllabus Chemistry Part I, Unit 1 'Some Basic Concepts of Chemistry'_

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At the bulk level, matter is classified as a pure substance or a:

  1. Modifier
  2. Mixture
  3. Measure
  4. Mineral
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Correct answer: B. Mixture

1. The classification at bulk level has two branches. 2. One is the pure substance. 3. At the macroscopic level, matter can be classified as mixture or pure substance. 4. So the answer is a mixture. _Source: syllabus Chemistry Part I, Unit 1 'Some Basic Concepts of Chemistry'_

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A mixture may be heterogeneous or:

  1. Homogeneous
  2. Hydrogenous
  3. Halogenous
  4. Harmonious
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Correct answer: A. Homogeneous

1. Mixtures divide by whether the composition is uniform. 2. One of the two names describes the uniform case. 3. A mixture may be homogeneous or heterogeneous. 4. So the answer is homogeneous. _Source: syllabus Chemistry Part I, Unit 1 'Some Basic Concepts of Chemistry'_

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