Chemistry - 2013 E.C (2020/2021) Ethiopian University Entrance Exam (EUEE)

A All

B I and II

C IV

D II and III

A Sn (s) + H₂O (g) → SnO₂(s)

B Sn (s) + dil. 2HCl (aq) → SnCl₂ (aq) +H₂ (g)

C Sn (s) + 2Cl₂ (g) → SnCl₂ (s) in cold media

D Sn (s) + 2H₂O (g) → Sn(OH)₄ (s)

A 2-methyl-1,3-butadiene (isoprene)CH₂=C(CH₃)-CH=CH₂

B 2-chloro-1,3-butadiene (chloroprene) H2C=C(Cl)-CH=CH2

C

D 1,3-butadiene H2C=CH-CH=CH2

A I and II

B III

C I

D II and III

A -[CH₂-CHCl]_n-

B -[CH₂-CH₂]_n-

C -[CH₂CH₂]_n-[CH₂-CH(CH₃)]_n-

D

A Polypropylene; electrical insulation

B Polyethylene; food containers

C Polytetrafluoroethylene; making shoes

D Polyvinyl chloride; making pipes

A polymers produced by condensation reaction of monomer units

B polymers produced by the addition reaction of monomer units.

C polymers produced by the substitution of one or more atoms in the monomer units.

D polymers found in some substances like rubber in nature.

A saponification with NaOH.

B esterification of the acids.

C halogenations of the C-C double bonds.

D hydrogenation of the C-C double bonds.

A most colloids and suspensions appear cloudy.

B colloidal particles are small enough and do not settle down unlike in a suspension.

C colloids are as transparent as solutions.

D both colloids and suspensions are heterogeneous mixtures.

A dissolves more amount of solute than it can normally dissolve.

B gives an unsaturated solution of substance at given temperature.

C dissolves double the amount of solute than it can normally dissolve.

D gives a saturated solution of the substance at a given temperature.