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This article needs attention from an expert in chemistry. ... "First 25 of 125 big questions that face scientific inquiry over the next quarter-century".
Each question has four answer choices. The questions are loosely grouped into 10 sets of 6 items; each set corresponds to a different chemistry topic. Typically, the topics are, in order, descriptive chemistry/laboratory techniques, stoichiometry, gases/liquids/solids, thermodynamics, kinetics, equilibrium, electrochemistry, electronic ...
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Chemistry is the scientific study of the properties and behavior of matter. [1] It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during reactions with other substances.
Each set was of 2 hours duration. But, in 2012 and 2013, PET was conducted in 1 set only of 3 hours duration and containing 100 questions of Mathematics and 50-50 questions from Physics and Chemistry. The marking scheme was +1 for correct answers and 0 for the incorrect answer.
Asking these this-or-that questions is a great way to strike up a conversation with someone new or learn more about your friends.
Whether the questions are about values, work, hobbies, or dreams, the types of questions that bring people closer are typically about the topics that are most important to each person.
The answer sheet had room for 115 answers; however, no test had more than 95 questions. 1–100 were standard multiple-choice bubbles and 101–115 were for 'relationship analysis questions', which were only used for the chemistry exam.
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