In the past, carbon tetrachloride was a common ingredient in cleaning compounds that were used throughout the home, but it was found to be dangerous: when heated, it changes into a poisonous gas that can cause severe illness and even death if it is inhaled.īecause of this dangerous characteristic, the United States revoked permission for the home use of carbon tetrachloride in 1970. Despite its widespread use in industry, carbon tetrachloride has been banned for home use. Berikut ini adalah 'contoh soal toefl reading dan pembahasannya 2014' yang bisa anda unduh secara gratis dengan menekan tombol download biru.
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