An unknown ester is hydrolysed to give ethanol as one of the products. Which chemical test can be used to confirm the identity of this alcohol?
2,4-DNP test
Tollen's test
lodoform test
Schiff's test
Which of the following pairs form the same osazone?
Glucose and fructose
Glucose and galactose
Glucose and arabinose
Lactose and maftose
Ozone is quantitatively determined by bubbling it through an excess of acidic potassium iodide solution, which liberates iodine. The liberated iodine is then titrated with sodium thiosulphate solution.
If 25.0 mL of the iodine-containing solution required 20.0 mL of 0.01 M sodium thiosulphate for complete titration, calculate the number of moles of ozone that reacted.
$1.00 \times 10^{-4} \mathrm{~mol}$
$2.00 \times 10^{-4} \mathrm{~mol}$
$3.00 \times 10^{-4} \mathrm{~mol}$
$5.00 \times 10^{-4} \mathrm{~mol}$
Select the most appropriate idiom to fill in the blank. The team always $\_\_\_\_$ to come up with unique advertisements for all its clients.
thinks outside the box
throw caution to the winds
take a back seat
turn the tables
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