Chemistry-Objective Related Question Answers
876. What is the blue mineral of aluminium?
Lapislazuli
877. Which is the black impure aluminium oxide mineral found in nature?
Emery
878. Which metal is essential for the production of haemoglobin?
Iron
879. What is a metallic radical present in toilet soap?
Potassium
880. Which metal is added to gold for making ornaments?
Copper
881. Which metal is contained in chlorophyll?
Magnesium
882. Which are the two metals kept in kerosene?
Sodium; Potassium
883. Which metal is used in the filaments of electric lamps?
Tungsten
884. Bronze is an alloy of?
Tin and copper
885. Alloy having low melting point?
Solder
886. Alloy used to make rock driller?
Manganese
887. Alloy used to make springs and suspension?
Phospher Bronze
888. Constituent metals contained in the alloy sterling silver?
Copper and silver
889. Alloy used in the manufacture of gun barrels?
Gun metal
890. Constituent metals contained in chrome steel?
Iron and Chromium
891. Alloy used in the manufacture of pendulum of clock?
Invar
892. Constituent metals contained in Invar?
Iron and Nickel
893. Which is the first alloy; a mixture of two metals to be made in the world?
Bronze
894. Which alloy is used for preparing strong magnets?
Alnico
895. Name the alloy used for casting engine parts?
Silumin
896. Alloy used for the construction of air craft?
Duralumin
897. What is galvanising?
Coating iron with Zinc
898. What do you mean by calcination?
Heating in the absence of air
899. Alloy used for making superstructures of steamers?
Magnalium
900. Which alloy of aluminium is used for making coins?
Aluminium bronze
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