Tag: geography

Questions Related to geography

The removal of unwanted impurities by mechanical methods is known as:

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

  1. finishing

  2. ore dressing

  3. smelting

  4. none of these

Show answer
Correct Option: B
Explanation:

As dressing is the process which have extraction and dressing. So, unwanted materials are removed through this method.

In manufacture of iron from Haematite, lime stone is added is act as:

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

  1. slag

  2. an oxidizing agent

  3. a reductant

  4. flux

Show answer
Correct Option: D
Explanation:

Lime stone in the manufacture of Hematite ore is called flux. It removes unwanted material combining with gangue. 

Calcium silicate slag formed in extraction of iron :

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

  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

Show answer
Correct Option: A,D
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.

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

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

  1. To remove the unwanted impurities

  2. To obtained pure substances

  3. To separate, two different but useful components

  4. All of these

Show answer
Correct Option: D
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.

Matte contains mainly:

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

  1. $FeS$

  2. ${Cu} _{2}S$

  3. ${Cu} _{2}S$ and $FeS$

  4. ${Cu} _{2}S$ and ${Fe} _{2}{S} _{3}$

Show answer
Correct Option: C
Explanation:

Matte contains mainly ${Cu} _{2}S$ and $FeS$. It also contains coke and sand. It is the molten metal obtained from the blast furnace.

Which element is present in Ruby as impurity?

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

  1. $Cu$

  2. $Cr$

  3. $Au$

  4. $Zn$

Show answer
Correct Option: B
Explanation:

Chromium (Cr) metal is present in Ruby as an impurity. Ruby has pink to blood-red colour. It is a  gemstone. It is a variety of the mineral corundum (aluminium oxide).

The 1991 census was not held in this state __________ .

geography towards gender equality social aspects of gender and women's education position of women and major social evils women change the world

  1. Punjab .

  2. Jammu and Kashmir .

  3. Karnataka .

  4. Andhra Pradesh .

Show answer
Correct Option: B
Explanation:

Census is conducted after every ten years since 1872 in India. The 1991 census of India was the 13th census among the series of census conducted. By March 1, 1991 the total counted population of India was at 843.931 million. No census was conducted in the state of Jammu &  Kashmir in 1991 due to the disturbed conditions prevailing there. Option B is correct answer.

The following states in India has the lowest sex ratio than national average in 2001 census?

geography towards gender equality social aspects of gender and women's education position of women and major social evils women change the world

  1. Punjab

  2. Delhi

  3. Haryana

  4. Orissa

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Correct Option: B

According to Census 2011 the number of females per thousand males is _______________.

geography towards gender equality social aspects of gender and women's education position of women and major social evils women change the world

  1. 950

  2. 943

  3. 940

  4. 942

Show answer
Correct Option: B

The Vikramshila Mahavihara, the renowned educational centre of Pala period is at ____________.

geography ancient cities of tamilagam preservation of our heritage preserving indian heritage applied history

  1. Basarh

  2. Aphasad

  3. Antichak

  4. Chandimau

Show answer
Correct Option: C