What Happens when the food coloring is added to the bottle in the lava lamp experiment?

What Happens when the food coloring is added to the bottle?

If a reducing sugar is present what colour will Benedict's solution change to?

Effervescence in the laboratory signifiesA. a simple reaction during the heating of a compoundB. an addition of a few drops of concentrated acidC. the release of a gasD. all of the abovePhenol can release an acidic gas in the laboratory.A. If some chemical reactions are carried out on itB. This statement is not correctC. At room temperatureD. The released acidic gas will turn blue litmus paper to redIt is unethical to eat in the laboratoryA. for health reasonsB. it is a laboratory lawC. it could get contaminated with some poisonous chemicalsD. all of the aboveAll of the following except one is needed for a solubility testA. a spatulaB. a Bunsen burnerC. a test tubeD. a thermometerAll the following is needed for a sodium fusion test exceptA. sodium metalB. an ignition tubeC. a test tubeD. a thermometerAll the following except one is needed for a Lassaigne test in the laboratoryA. a mortar and a pestleB. a water bathC. a funnelD. round-bottomed flaskAll the following laboratory glass wares except one are needed during functional group testsA. a Bunsen burnerB. a glass funnelC. a test tubeD. a beaker for collecting waterA gas that turns red litmus paper to blue isA. acidicB. basic

Choose the answer that represents a chemical change. *Dissolving salt in waterTearing up a receiptBurning your old homeworkMixing food coloring in water

Which method uses the color changes of several indicators to measure the pH of a solution?