January 2016 Chemistry Regents #26-30
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Questions | Answer | Links | Explanations |
26 Which type of substance yields hydrogen ions, H+ in an aqueous solution? (1) an Arrhenius acid (2) an Arrhenius base (3) a saturated hydrocarbon (4) an unsaturated hydrocarbon | 1 | H+ is an Arrhenius acid | |
27 Phenolphthalein is pink in an aqueous solution having a pH of (1) 5 (2) 2 (3)7 (4) 12 | 4 | basic pHs of more than 10 is pink | |
28 According to one acid-base theory, NH3 acts as a base when an NH3 molecule (1) accepts an H+ ion (2) donates an H+ ion (3) accepts an OH- ion (4) donates an OH- ion | 1 | bases accept H+ | |
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29 Which reaction releases the greatest amount of energy per mole of reactant? (1) decomposition (2) esterification (3) fermentation (4) fission | 4 | nuclear reactions releases the most amount of energy fission | |
30 Which nuclear emission is negatively charged? (1) an alpha particle (2) a beta particle (3) a neutron (4) a positron | 2 | table O beta is negative | |
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