15 An anhydrous white salt, Z, is heated strongly for 30 minutes. A mixture of gases is given off. Thesolid remaining in the test-tube is then dissolved in a small volume of dilute hydrochloric acid. Theaddition of a few drops of dilute sulfuric acid to the test-tube causes a white precipitate to form.Which substance could be Z?A barium carbonateB barium nitrateC magnesium carbonateD magnesium nitrate

In the reaction : BaCl2 + ZnSO4 → ZnCl2 + BaSO4, the white precipitate seen is due to ______.ZnCl2BaSO4BaCl2ZnSO4

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

A student heated a blue copper sulfate crystal in a test tube. After a few minutes, she observed that the crystal turned white and the inside of the test tube was covered with a thin film of water. The water inside the test tube most likely __.Multiple choice question.condensed from the air around the test tubecame from the blue copper sulfate crystal, which is a hydrateseeped through the sides of the test tubewas left from cleaning the test tube the night before

Which answer would provide the most detailed and accurate description of the observations for this reaction?Group of answer choicesThe test tube contains both a white, cloudy liquid and a clear, colorless liquid.The test tube contains a white liquid and a clear, colorless solid.The test tube contains a white solid floating in a clear, colorless liquid.The test tube contains a clear, colorless liquid with a white solid that has sunk to the bottom.

A compound P is heated in a test tube with sodium hydroxide solution. A red litmuspaper held at the mouth of the test tube turns blue.Which of the following could compound P be?(a) zinc sulphate(b) copper sulphate(c) ferrous sulphate(d) ammonium sulphate