Miscellaneous Questions based on the Chemistry in Everyday Life
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CHXII15: CHEMISTRY IN EVERYDAY LIFE

325287 The recommended concentration of fluoride ion in drinking water is up to \(1 \mathrm{ppm}\) as fluoride ion is required to make teeth enamel harder by converting \(\left[3 \mathrm{Ca}_{3}\left(\mathrm{PO}_{4}\right)_{2} . \mathrm{Ca}(\mathrm{OH})_{2}\right]\) to :

1 \(\left[3\left(\mathrm{CaF}_{2}\right) \cdot \mathrm{Ca}(\mathrm{OH})_{2}\right]\)
2 \(\left[3\left(\mathrm{Ca}_{3}\left(\mathrm{PO}_{4}\right)_{2} \cdot \mathrm{CaF}_{2}\right]\right.\)
3 \(\left[3\left(\mathrm{Ca}(\mathrm{OH})_{2}\right] \cdot \mathrm{CaF}_{2}\right]\)
4 \(\left[\mathrm{CaF}_{2}\right]\)
CHXII15: CHEMISTRY IN EVERYDAY LIFE

325288 Which of the following is not correctly matched?

1 BHT \(\rightarrow\) antioxidant
2 Aspartame \(\rightarrow\) artificial sweetener
3 Ranitidine \(\rightarrow\) Analgesic
4 Table salt \(\rightarrow\) Preservative
CHXII15: CHEMISTRY IN EVERYDAY LIFE

325289 The active component of dynamite is

1 keiselghur
2 nitroglycerin
3 nitrobenzene
4 trinitrotoluene.
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CHXII15: CHEMISTRY IN EVERYDAY LIFE

325287 The recommended concentration of fluoride ion in drinking water is up to \(1 \mathrm{ppm}\) as fluoride ion is required to make teeth enamel harder by converting \(\left[3 \mathrm{Ca}_{3}\left(\mathrm{PO}_{4}\right)_{2} . \mathrm{Ca}(\mathrm{OH})_{2}\right]\) to :

1 \(\left[3\left(\mathrm{CaF}_{2}\right) \cdot \mathrm{Ca}(\mathrm{OH})_{2}\right]\)
2 \(\left[3\left(\mathrm{Ca}_{3}\left(\mathrm{PO}_{4}\right)_{2} \cdot \mathrm{CaF}_{2}\right]\right.\)
3 \(\left[3\left(\mathrm{Ca}(\mathrm{OH})_{2}\right] \cdot \mathrm{CaF}_{2}\right]\)
4 \(\left[\mathrm{CaF}_{2}\right]\)
CHXII15: CHEMISTRY IN EVERYDAY LIFE

325288 Which of the following is not correctly matched?

1 BHT \(\rightarrow\) antioxidant
2 Aspartame \(\rightarrow\) artificial sweetener
3 Ranitidine \(\rightarrow\) Analgesic
4 Table salt \(\rightarrow\) Preservative
CHXII15: CHEMISTRY IN EVERYDAY LIFE

325289 The active component of dynamite is

1 keiselghur
2 nitroglycerin
3 nitrobenzene
4 trinitrotoluene.
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CHXII15: CHEMISTRY IN EVERYDAY LIFE

325287 The recommended concentration of fluoride ion in drinking water is up to \(1 \mathrm{ppm}\) as fluoride ion is required to make teeth enamel harder by converting \(\left[3 \mathrm{Ca}_{3}\left(\mathrm{PO}_{4}\right)_{2} . \mathrm{Ca}(\mathrm{OH})_{2}\right]\) to :

1 \(\left[3\left(\mathrm{CaF}_{2}\right) \cdot \mathrm{Ca}(\mathrm{OH})_{2}\right]\)
2 \(\left[3\left(\mathrm{Ca}_{3}\left(\mathrm{PO}_{4}\right)_{2} \cdot \mathrm{CaF}_{2}\right]\right.\)
3 \(\left[3\left(\mathrm{Ca}(\mathrm{OH})_{2}\right] \cdot \mathrm{CaF}_{2}\right]\)
4 \(\left[\mathrm{CaF}_{2}\right]\)
CHXII15: CHEMISTRY IN EVERYDAY LIFE

325288 Which of the following is not correctly matched?

1 BHT \(\rightarrow\) antioxidant
2 Aspartame \(\rightarrow\) artificial sweetener
3 Ranitidine \(\rightarrow\) Analgesic
4 Table salt \(\rightarrow\) Preservative
CHXII15: CHEMISTRY IN EVERYDAY LIFE

325289 The active component of dynamite is

1 keiselghur
2 nitroglycerin
3 nitrobenzene
4 trinitrotoluene.
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