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Posted by Mahalakshmi Soundharajan 5 years, 6 months ago
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Gaurav Seth 5 years, 6 months ago
Radius of cylinder (R) = 1cm
Height of cylinder (H) = 16cm
Let, the radius of small spheres be rcm
So,
12(volume of small sphere) = volume of cylinder
=> 12(4/3πr^3) = πR^2H
=> 16r^3 = 1^2 × 16
=> r^3 = 1cm
=> r = 1cm.
Diameter = 2R = 2x1 = 2 cm
Posted by Aman Prasad 5 years, 6 months ago
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Yogita Ingle 5 years, 6 months ago
A combination reaction is one in which two or more substances react together to form a third substance which is the addition product of the two.
Here there is an exchange of electrons between the two compounds. When solid iron ‘metal is heated’ with powder sulphur which is a non-metal iron sulphide is formed. Iron exhibits a variable valency of 2 and 3.
Here it loses two electrons, on the other ‘hand sulphur’ gains these two electrons. And hence FeS is formed.
Fe + S ⟶ FeS
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Yogita Ingle 5 years, 6 months ago
Major Iron Ore Belts in India
- Orissa Jharkhand Belt: Badampahar mines in the Mayurbhanj and Kendujhar districts of Orissa have high grade hematite ore. Additionally, hematite iron ore is mined in Gua and Noamundi in Singhbhum district of Jharkhand.
- Durg Bastar Chandrapur Belt: This belt lies in Chhattisgarh and Maharashtra. The Bailadila range of hills in the Bastar district of Chhattisgarh have very high grade hematite ore. This hilly range has 14 deposits of super high grade hematite ore. Iron from these mines is exported to Japan and South Korea via Vishakapatnam port.
- Bellary Chitradurga Chikmaglur Tumkur Belt: This belt lies in Karnataka. The Kudremukh mines located in the Western Ghats are a 100 percent export unit. The ore from these mines is transported as slurry through a pipeline to a port near Mangalore.
- Maharashtra Goa Belt: This belt inculdes the state of Goa and Ratnagiri district of Maharashtra. The ores in these mines are not of very high quality. They are exported through Marmagao port.
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