Chemistry
Name the main component of the following alloys:
(i) Brass
(ii) Duralumin
Metallurgy
ICSE 2018
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Answer
(i) Copper
(ii) Aluminium
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Related Questions
Aluminium carbide reacts with water according to the following equation :
Al4C3 + 12H2O ⟶ 4Al(OH)3 + 3CH4
(i) State what mass of aluminium hydroxide is formed from 12 g. of aluminium carbide.
(ii) State the volume of methane at s.t.p. obtained from 12 g of aluminium carbide.
[relative molecular weight of Al4Cl3] = 144 ; Al(OH)3 = 78
(i) If 150 cc of gas A contains X molecules, how many molecules of gas B will be present in 75 cc of B?
The gases A and B are under the same conditions of temperature and pressure.
(ii) Name the law on which the above problem is based.
Complete the following table which relates to the homologous series of hydrocarbons.
General formula IUPAC name of the homologous series Characteristic bond type IUPAC name of the first member of the series CnH2n-2 (A) …………… (B) …………… (C)…………… CnH2n+2 (D)…………… (E) …………… (F)…………… (i) Name the most common ore of the metal aluminum from which the metal is extracted. Write the chemical formula of the ore.
(ii) Name the process by which impure ore of aluminum gets purified by using concentrated solution of an alkali.
(iii) Write the equation for the formation of aluminum at the cathode during the electrolysis of alumina.