Answer Verified 204k + views Hint: In order to answer this question, first we will explain how defects in a metal block can be detected using ultrasound and then we will discuss how ultrasound works. We will also discuss the other uses of ultrasound. Complete step by step solution:

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Copper was first used by man over 10,000 years ago. A copper pendant discovered in what is now northern Iraq has been dated about 8700 B.C. For nearly five millennia copper was the only metal known to man, and thus had all the metal applications.

Image Soure: Sabarimala.kerala.gov.in This beautiful alloy was polished and offered to God to make what is now called the Kannadi Bimbam, or Idol of Mirrors. Another legend says that the chief priest noticed a crack in the crown of the local deity’s idol in Aranmula Temple.

The chemical properties of the compounds of metal and non-metal elements are also different: most metal oxides are basic most non-metal oxides are acidic Differences in physical.

Brass is an alloy of copper and zinc, Brass and copper vessels reacts with atmospheric oxygen and to form metal oxides. The nature of metal oxides is basic. Curd and sour substances contains acids, e.g., curd contains lactic acid and orange contains citric acid.

In this reaction, zinc displaces copper from copper sulphate solution and forms zinc sulphate as zinc is more strongly reactive metal as compared to copper. The colour changes from blue to colourless as copper sulphate is blue coloured and zinc sulphate is colourless. b)2Al + 6HCl = 2AlCl3 + 3H2

Metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved to extinguish a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride.

#class10#acidsbasesandsaltsWhich gas is usually liberated when an acid reacts with a metal? Illustrate with an example. How will you test for the presence of.

Electrowinning, also called electroextraction, is the electrodeposition of metals from their ores that have been put in solution via a process commonly referred to as leaching. Electrorefining uses a similar process to remove impurities from a metal.

Solution Extraction of metal: Extraction of metal can be easily done by the reduction process. Reduction process: It is a process in which the reduction of ore is done using carbon/coke. This process is usually carried out at higher temperatures. Example: Extraction of Zinc from Zinc oxide. Chemical reaction:

Mercury and copper cannot displace hydrogen from dilute acids as they are less reactive than hydrogen. Solution 2 Show Solution Sodium and magnesium are two metals which can displace hydrogen from dilute acids.