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It is usually taken by students during the final two years of Senior secondary school (Grade 10 & 11 (usually ages 15–16)) or external (non-school) candidate. The exam is usually held in December. The exams are held in three mediums Sinhala, Tamil and English.
3.307 022 307 057 62 × 10 25: C 59 H 120: n-nonapentacontane: 60 2.215 873 453 577 04 × 10 22: 1.042 501 343 360 61 × 10 26: C 60 H 122: n-hexacontane: 61 5.985 809 784 770 69 × 10 22: 3.288 633 820 091 64 × 10 26: C 61 H 124: n-henhexacontane 62 1.618 057 253 492 97 × 10 23: 1.038 111 737 095 70 × 10 27: C 62 H 126: n-dohexacontane 63 4 ...
Hexane (/ ˈ h ɛ k s eɪ n /) or n-hexane is an organic compound, a straight-chain alkane with six carbon atoms and the molecular formula C 6 H 14. [ 7 ] Hexane is a colorless liquid, odorless when pure, and with a boiling point of approximately 69 °C (156 °F).
Students in Grade 13 had the second-highest depression and anxiety scores, with examination-related issues being the most commonly cited problem. Of the 445 students assessed, 22.9% of Grade 12 students and 28.6% of Grade 13 students reportedly had severe depression , while 28.6% of Grade 12 students and 32.1% of Grade 13 students experienced ...
These results suggest that other components found in petroleum benzine may have additive, synergistic or potentiative effects on the biological effects of n-hexane. [7] Namely, 1000 ppm n-hexane, 3000 ppm n-heptane, and 1000 ppm toluene were reported to have depressing effects on the body weight gain of rats. [8]
The medium was either Sinhala or Tamil. In 1942 a special committee was appointed to observe the education system and, among the suggestions that followed, the following play an important role: i. Make available to all children a good education free of charge, so that education ceases to be a commodity purchasable only by the urban affluent. ii.
Download as PDF; Printable version; In other projects Wikidata item; Appearance. ... of n-Hexane/Ethanol [5] P = 760 mm Hg BP Temp. °C % by mole ethanol liquid vapor ...
2-Methylpentane, trivially known as isohexane, is a branched-chain alkane with the molecular formula C 6 H 14.It is a structural isomer of hexane composed of a methyl group bonded to the second carbon atom in a pentane chain.