D) Polivinilspirt.
196. Quyidagi polimertlar orasidan polistirolga tegishli struktura formulani ko`rasating.
CH3
A
CH3
CH3
) B)
C
C6 H5
Cl
) D)
197. Faqat tabiiy tolalar keltirilgan qatorni ko`rsating.
A) Paxta, zig`ir, aseton, jun, ipak
B) Paxta, zig`ir, jun, ipak
C) Viskoza, mis-ammiakli aseton, kapron
D) Kapron, lavsan, xlorin, nitron.
1
CN
98. Ushbu sintetik tola qanday ataladi.
A) Kapron, B) Lavsan, C) Xlorin, D) Nitron.
199. O`zbekiston alkaloidlar kimyosi maktabini yaratgan o`zbek kimyogar olimini ko`rsating.
A) H.U.Usmonov
B) S.Y.Yunusov
C) Sh.T. Tolipov
D) K.S.Ahmedov.
200. O`zbekistonda kimyo faninig yangi soxasi biorganik kimyo fanining asoschisini ko`rsating.
A) K.S. Ahmedov
B) A.M. Asqarov
C) O.S.Sodiqov
D) H.U.Usmonov.
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