Plovdiv entrance test Questions and Correct Answers | Latest Update

The mass number and atomic number of the lithium atom are shown by the symbol 3 7 Li. What is the correct symbol for the lithium-ion in lithium chloride? A) 2 6 LiB) 3 6 Li+ C) 3 7 Li+ D) 3 7 Li- C) 3 7 Li+ All of the following can act as Brønsted-Lowry acid (proton donors) in aqueous solution except: A) HI B) HCO3 - C) H2S D) NH3 D) NH3 Master01 | October, 2024/2025 | Latest update 1 | P a g e | © copyright 2024/2025 | Grade A+ All of the following statements about carbon dioxide are true except: A) it can be prepared by the action of acid on limestone B) it is used to extinguish fires C) it dissolves in water at room temperature D) it sublimes rather than melts at 20°C and 1 atmosphere pressure D Which of the options will form the major product ? - primary carbocation - secondary carbocation - tertiary carbocation - TERTIARY CARBOCATION BECAUSE IT IS MORE STABLE True or false , alcohols do not react with NaOH ? true , they do not react with NaOH and thus no salt is formed Which of the reaction shown below involves the formation of an ionic precipitate from a solution? A) Ca2+ + CO3 CaCO3 B) HCO3 - + H+ H2CO3 Master01 | October, 2024/2025 | Latest update 1 | P a g e | © copyright 2024/2025 | Grade A+ C) Fe + Cu2+ Fe2+ + Cu D) CaCO3 + H2CO3 Ca(HCO3)2 A ; because a precipitate is formed when a cation and an anion react. Given the following process that has reached equilibrium: NaCl (s)-- NaCl (aq). For the phase equilibrium to exist, the NaCl (aq) must be a solution that is: A) concentrated B) saturated C) supersaturated D) unsaturated B ; Since only a saturated solution would mean that there is a balance in concentrations in the system Glucose and fructose are: A) enantiomers B) functional isomers C) tautomers D) chain isomer Master01 | October, 2024/2025 | Latest update 1 | P a g e | © copyright 2024/2025 | Grade A+ Functional Isomers Which of the following is an observable property of many acids? A) they become slippery when reacting with water B) they react with metals to release hydrogen gas C) they produce salts when mixed with other acids D) they become more acidic when mixed with a base