Chemistry
What is an 'alloy'. Give composition of
(i) duralumin
(ii) brass
(iii) fuse metal.
Metallurgy
1 Like
Answer
Alloy — An alloy is a homogeneous mixture of two or more metals or of one or more metals with certain non-metallic elements.
(i) Duralumin — Al [95%], Mg [0.5%], Mn [0.5%], Cu [4%]
(ii) Brass — Cu [60-80%], Zn [40-20%]
(iii) Fuse metal — Pb [50%], Sn [50%]
Answered By
3 Likes
Related Questions
Calculate
(i) The volume of 2.5 moles of a gas X at stp.
(ii) The weight of 2.8 dm3 of a basic gas you have learnt, at STP.
(iii) The molecular weight of a gas Y whose 5.6 litres of volume at STP weighs 3.5 gms.
(at wt of C = 12, X = 14, H = 1, O = 16)
Concentrated nitric acid oxidises phosphorus to phosphoric acid as
P + HNO3 ⟶H3PO4 + H2O + NO2
Balance the equation and answer the following questions based on it.
(i) What mass of phosphoric acid can be prepared from 6.2 g of phosphorus?
(ii) What mass of nitric acid will be consumed at the same time ?
(iii) What would be the volume of steam produced at the same time if measured at 760 mm. Hg pressure and 273°C.
(Atomic wt of H = 1, N = 14, O = 16, P = 31) ?
Define
(i) Acid
(ii) molar volume
(iii) neutralisation.
(i) Define pH. If the hydrogen ion concentration of a solution is 10-12 moles per litre, calculate its pH value.
(ii) What fluid is injected when yellow wasps or white ants bite? How can the pain be relieved?
(iii) A solution of Iron (III) chloride has a pH less than 7. Is the solution acidic or alkaline. Write the equation of its hydrolysis.
(iv) If iron is reacted with dilute sulphuric acid, what will be the product formed ?