What is type metal?

Monjur Alahi

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Salim Ahmed Kawsar

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In printing, type metal (sometimes called hot metal) refers to the metal alloys used in traditional type founding and hot metal typesetting. Lead is the main constituent of these alloys. Antimony and tin are added to make the character produced durable and tough while reducing the difference between the coefficients of expansion of the matrix and the alloy.

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Which of the following pairs will give displacement reactions? (a) NaCl solution and copper metal (b) MgCl2 solution and aluminium metal

(d) AgNO3 solution and copper metal

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Differentiate between metal and non-metal on the basis of their chemical properties.

Answer: Differences between metals and non-metals on the basis of their chemical properties. Metals Non-Metals 1. Oxides of metal are basic in nature. 1. Oxides of non-metals are acidic in nature. 2. Metals displace hydrogen from dilute acids. 2. They cannot...

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An oxide of an element was dissolved in water. The final solution turned red litmus blue. Is the element metal, non-metal or a metalloid?

The oxide of the element is basic as it turns red litmus blue .This means that the element is a metal (M).

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0.84 g of metal carbonate reacts completely with 40 ml of H2SO4. What is equivalent weight of the metal-

Solution: weight of metal carbonate/GEW = NaXVa in lt 0.84/GEW = 0.5X40/1000 GEW of metal carbonate = 42 GEW of Metal = 42 - GEW of CO3-2 = 42-30 = 12g

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Why is the reduction of a metal oxide easier if metal formed is in liquid state at the temperature of reduction ?

[Hint : Entropy is more positive when the metal is in liquid state as compared with solid state, so AG becomes more –ve.]

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Give appropriate reason for each of the following : (i) Metal fluorides are more ionic than metal chlorides.

[Hint : (i) According to Fajan’s Rule, bigger ions are more polarized than the smaller ions by a particular cation. (ii) ClO4 - is more resonance stabilized than SO4 2- since dispersal of negative charge...

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In nature, metal A is found in a free state while metal B is found in

Metal B will be nearer to the top of the activity series of metals as it is so reactive that it is found in combined state

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Name one metal and one non-metal that exist in liquid state at room temperature. Also name two metals having melting point less than 310K

Metal: Mercury (Hg); Non-metal: Bromine (Br)  Two metals with melting points less than 310K are Cesium (Cs) and Gallium (Ga).

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A metal M is found in nature as MCO3. It is used in galvanising iron articles. Name the metal.

(i) The metal is zinc (Zn). (ii) The carbonate ore is first heated strongly in limited supply of oxygen and changed into its oxide. This process is called calcination.  ZnCO3(s) +Heat----->ZnO(s) +CO2(g) Zinc oxide...

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Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?

It is easier to obtain metal from its oxide, as compared from its sulphides and carbonates. So prior to reduction, sulphide ores are converted into oxides by roasting and carbonate...

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