Place a few pieces of granulated zinc metal in a test tube.n Add 2 mL of sodium hydroxide solution and warm the contentsof the test tube.n Repeat the rest of the steps as in Activity 2.3 and record yourobservations

Which amongst the following can be observed when zinc granules are added to dilute hydrochloric acid taken in a test tube?

Zinc atoms can be converted to Zn2+ ions by I     adding the zinc to hydrochloric acid II    heating the zinc in air III   adding the zinc to cold water AI only BI and II only CII and III only DI , II and III

efers to the following experiment, which was set up and observed periodically for 1 hour:After 1 hour the following observations were made EXCEPTAThe solution had become paler blueBThe zinc rod had decreased in sizeCThe volume of the solution had decreasedDPink particles had collected at the bottom of the beaker

When conducting an experiment on reactions of metals with water, what must be done before you begin?Group of answer choicesclean the surface with sandpaper to remove oxidesclean the surface with a clothallow them to sit in the test tubes for 30 minutes

Take about 2 g barium hydroxide in a test tube. Add 1 g of ammonium chloride and mixwith the help of a glass rod. Touch the bottom of the test tube with your palm.