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block

Кое е пентоза

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---

глюкоза

няма верен отговор

малтоза

фруктоза

none

Кое е вярно за всички киселини

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---

реагират с вода чрез отделяне на газ водород

при взаим. с основи разтворът винаги има рН=7

техният воден разтвор е с рН<7

при взаим. с други киселини образуват соли

none

Кое е невярното

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---

H3PO4 е слаб електролит

H2O е амфолит

H2SO3 е среден по сила елетролит

CH3OH не се дисоциира във воден разтвор

none

С кои от посочените съединения ще реагират пропаналът и пропанонът

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---

етанол, натриева основа и циановодород

натрий, вода и циановодород

меден дихидроксид, водород и циановодород

водород, амоняк и циановодород

none

Кое за алфа-аминокиселините не е вярно

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---

разтворими са във вода

имат високи температури на топене

проявяват амфотерен характер

не могат да образуват високомолекулни съединения при взаимодействията си с аминокиселинните групи

none

Посочете реда, в който намалява реакционната способност при присъединителни реакции на посочените карбонилни съединения: метанал, пропанон, бензалдехид

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---

пропанон>метанал>бензалдехид

бензалдехид>метанал>пропанон

метанал>пропанон>бензалдехид

метанал>бензалдехид>пропанон

none

Кои образуват междумолекулни водородни връзки

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---

C3H8(OH)3

C2H5NH2

CH3COOH

C6H6CH2Cl

CH3CHO

none

Кой от посочените въглехидрати се хидролизира

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---

нишесте

фруктоза

всички монозахариди

глюкоза

none

Как може да се повиши стойността на ел. дисоциация за разтвор на СН3СООН

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---

чрез прибавяне на вода

няма верен отговор

чрез понижаване на температурата

чрез прибавяне на CH3COONa

none

При бутеновата киселина не е възможна

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---

позиционна

цис-транс

верижна

оптична

none

пи-връзката се образува при припокриване на

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---

sp-sp

няма верен отговор

sp3-sp3

sp2-sp2

none

В карбонатния анион CO3 2- има

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---

три прости сигма-връзки и една делокализирана пи-връзка

none

В бензена има

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---

6 сигма и 3 пи-връзки

12 сигма и 3 пи-връзки

12 сигма и 3 делокализирани пи-връзки

има само делокализирани пи-връзки

none

Йонните съединения са

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---

кристални решетка

електропроводими в твърдо състояние

none

При АК не е възможна

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---

верижна

геометрична

позиционна

оптична