Tag: in the land of kerala

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Questions Related to in the land of kerala

Multiple choice geography in the land of kerala introduction to metallurgy occurrence of metals study of kerala

Pig iron can be converted into steel by removing a lot of carbon contained in it, in a/ an:

  1. electrolytic chamber

  2. bessemer converter

  3. blast furnace

  4. pyrite burner
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Solution:- (B) bessemer converter

The Bessemer process was the first inexpensive industrial process for the mass production of steel from molten pig iron before the development of the open hearth furnace. The key principle is removal of impurities from the iron by oxidation with air being blown through the molten iron.

Multiple choice geography in the land of kerala introduction to metallurgy occurrence of metals study of kerala

Calcium silicate slag formed in extraction of iron :

  1. prevents the reoxidation of molten iron.

  2. catalyses the combustion of carbon
  3. reduces $CO _2$ to $CO$ at the bottom of the furnace

  4. is used in cement industry
Reveal answer Fill a bubble to check yourself
A,D Correct answer
Explanation

Slag formed in extraction of iron is consists of $CaSiO _3$ which is further used for making cement.
Also, formation of this slag prevents the re-oxidation of molten iron.

Multiple choice geography in the land of kerala introduction to metallurgy occurrence of metals study of kerala

Why do we need to separate different components of a mixture? Select the correct explanation from the following.

  1. To remove the unwanted impurities

  2. To obtained pure substances

  3. To separate, two different but useful components

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mixtures have different physical and chemical properties compared with same metals. we need to separate different substances from mixtures as we want only useful substances and to obtain pure substances.

Multiple choice geography kerala, from eighth to eighteenth century kerala during medieval period in the land of kerala study of kerala

The chief of Nadu were ______.

  1. Nadupathi

  2. Naduraj

  3. Nadular

  4. Naduvazhi
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

After the end of the Perumal rule in the beginning of the 12th century, the Naduvazhis came in to force. Basically Naduvazhis means the territorial divisions which consisted of nadus further ruled by naduvazhis, which were divided into desams ruled by desavazhis who were directly under naduvazhis and subject to their dictation.

Multiple choice geography kerala, from eighth to eighteenth century kerala during medieval period in the land of kerala study of kerala

In the matters of administration, the $Perumals$ were assisted by $Naluthali$, the council of Brahmins.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Perumals had representatives called Koyiladhikarikal. In the matters of administration the Perumals were assisted by Naluthali, the council of Bramhins. Perumals had a militia called Ayiram (Thousand). Perumals levied taxes from the Nadus, Nagaras (towns), Brahmin Gramas, temples, etc.