Right or Wrong, Science I, SSC, 10th Maharashtra,
Write right or wrong. If wrong, write the correct sentence.
Chapter No. 8: Metallurgy.
Magnesium strip burns in air with a bright white flame.
Ans. Right.
Nonmetals achieve stable noble gas configuration by losing electrons.
Ans. Wrong.
Reason: Nonmetals achieve stable noble gas configuration by gaining electrons.
Cassiterite, an ore of tin mainly contains the magnetic ingredient, FeWO4 and the nonmagnetic ingredient, SnO2.
Ans. Right.
In Bayer's process, bauxite ore is leached by aqueous sodium carbonate solution.
Ans. Wrong.
Reason: In Bayer's process, bauxite ore is leached by aqueous sodium hydroxide solution.
In calcination, carbonate ores are heated in an excess supply of air.
Ans. Wrong.
Reason: In calcination, carbonate ores are heated in a limited supply of air.
The process of coating zinc over iron or steel is called galvanization.
Ans. Right.
Bronze is an alloy of copper and zinc.
Ans. Wrong.
Reason: Bronze is an alloy of copper (90%) and tin (10%).
Stainless steel is an alloy of iron (74%), chromium (18%) and carbon (8%).
Ans. Right.
