Which metal among magnesium, copper, gold, sodium and aluminium, loses its lus-tre at a faster rate?

Which metal amongcopper, aluminium and goldlooseits metalic luster at a faster rate? Write the equation of thereact..ion

5ml water is taken in 3 test tubes. Copper, sodium and magnesium of equal mass are dropped in different test tubes. Test tubes having copper and magnesium are heated: Write the equations for the reaction in the test tube in which sodium is dropped.

5ml water is taken in 3 test tubes.Copper, sodium and magnesium of equal mass are dropped in different test tubes. Test tubes having copper and magnesium are heated: Arrange these metals in the decreasing order of their reactivity.

Which of the following statements are true? i) Elements which are least reactive occur in free state or native state ii) Earthly or undesired materials present along with ore are called gangue iii) Among metals, aluminium is the most abundant in the earth crust iv) All ores are minerals but all minerals are not ores v) Gemstone "Ruby" is the impure form of Al_2O_3 containing impurity : Co vi) The set of d-block elements Cu, Ag, Au mostly occur as sulphide ore

Which of the properties of metals is utilized in the following Instances? Aluminium utensils are used for cooking. Copper is used for making vessels. Gold wires are used in ornaments.

Clay, cryolite and bauxite are the minerals of aluminium: Which among them is the ore of aluminium? What is its chemical formula?

The names of some metals are given below. Tungsten, Gold, Sodium, Copper, Iron, Magnesium Answer the following questions by selecting the appropriate ones from the list. Which metal with high malleability is used for making ornaments? Which of these metals reacts with cold water? Which of these is a hard metal but corrodes easily?