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NameClass Date:

RevisionMCQ1' A tiquid is thought to be pure ethanoic acid. What is the best way to test itspurity?

i

ABcD2. which method is used to obtain pure water from a sugar solution?A chromatographyB crystallizationC distillationD filtration3. The diagram shows the electron arrangement iin a molecule of the

burn it completely in oxygenreact it with aqueous sodium hydroxidemeasure its boiling pointreact it with ethanol

compound Zyg.W

o\,4cp

X Electrons of y atomo Electrons of Z atomWhich pair of elements could be Z and y? / hane S "Gfu-nq e- i,"'^Z y So )n y/-ouo $ .A magnesium fluirine IP 9rryg"n oervrrium V .g ho.,to a*(q I *6a- e-! bgron ",.ion {.., '-\^'..- .,Jo nitrogen nyorilen ..: ,lir:il^ gropr (, D ,4' Which statement about the molecules in the gas carbon dioxide is conect?

The molecules are close together/.The molecules are diatomic-loThe molecules move randonlyThe molecules all move with tire same speed/ 6/ABcD

8/14/2019 3MM Answers

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Class :Structured qugstions

-=_

?oa4 r1. use the data in the table to answer the questions that tollow,/- '

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NameClass

3.

Date:

Diagram befow shows a fractionaldistillation setup.Ae

liquid

()

C

State the following: ,-a' I\Byruornrde,r ,/ B: GJense+'=l

a) Which substance is a eas f temperature (25"C)?(ubfiqncs ft3 /

The melting points and the boiling points of substances are given in thetable: ( c*L LSubgtance lleltins point loC Boilins point /oCA '44 q'Gd' 280B -25 -50c 110 185D 85 450

b) Which substance is a liquid at\avru. k

c) Which substance exists as a tiquid over the larges(range of temperature?.//utshncz D5. Name a process used to separate a mixture of:

a) three water soluble dyes Cb) water and insolubfe sotid

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