Question Discussion & Solution

Ammeter is an instrument used to measure Current.

Similarly, Hygrometer is an instrument used to measure Humidity

The correct answer is A) 4, B) 2, C) 1, D) 3.

Key Points

• Sodium - It can be simply cut with knife as a result of Sodium has one negatron in its valence shell. Being the primary part of that amount, it is giant size.
• Mercury is liquid at temperature. A heavy, silvery d-block component, mercury is that the solely metal that's liquid at customary conditions for temperature and pressure.
• Silver is that the sensible conductor of electricity as a result of it contains the next variety of movable atoms (free electrons). For a fabric to be an honest conductor, the electricity more experienced it should be able to move the electrons.
• Lead being metal may be a dangerous conductor of electricity and warmth. Compared to alternative metals, lead may be a poor conductor of warmth whereas gold, silver, Pt square measure sensible conductors of warmth.

Option(3) is correct.

Assumption I: There is a doubt about the quality of water being supplied in the town: Cholera is spread through water or through food and to prevent the spread of cholera in town, doubt about the quality of water is precautionary. So, this assumption is implicit.

Assumption II: There is some report of cholera in town: As indicated in the given statement, the medical department attempt to prevent the spread of cholera and the spreading of disease only takes place if it exists. So, this assumption is implicit.

Hence, the correct answer is an option(3)i.e., Both the assumptions are correct.

Explanation:

• Bronze is an alloy of copper and tin as the two main constituent elements.
• Bronze is a copper-based alloy that typically consists of approximately 88% copper and 12% tin.
• Some other elements added in minute quantities can be aluminium, nickel or zinc.
• It is one of the first alloys used by mankind and an entire era known as the 'Bronze Age' is known because of the extensive use of the alloy in many human artefacts.

Additional Information

Steel: 

• Stainless steel is an alloy of iron and chromium.
• Steel is an alloy of iron and carbon.
• Stainless steels are steels containing at least 10.5% chromium, less than 1.2% carbon, and other alloying elements.

Solder:

• Soldering is a joining process used to join different types of metals together having different properties. 
• Solder is a metal alloy, usually made up of tin and lead which is melted using a hot iron (soldering iron).
• The iron is heated to temperatures above 600˚F which then cools to create a strong bond.
• Flux material used in soldering is ZnCl2 (Zinc Chloride) and NH4Cl (Ammonium Chloride).

Brass:

• Brass is a metal alloy that is made up of copper and zinc.
• The proportions of zinc and copper can vary to create different types of brasses with different properties.
• It has higher malleability than bronze or zinc and has a relatively low melting point (900 to 940 °C).

Mistake Points

• Copper was the first metal used by men.
• Copper was first used by man over 10,000 years ago.  
• Probably copper can be found as a naturally occurring native metal that is sometimes found in large lumps on the ground.
• People learned to make this into copper tools and other things, although, for a metal, it is quite soft.
• When it was melted over the fire, people learned how to make an alloy called bronze, which is much harder and stronger than copper.

The correct answer is Social Justice and Empowerment.

• As of June 2020, Master Bhanwarlal Meghwal is the Cabinet Minister of Social Justice and Empowerment in Rajasthan.

Key Points

• Bhanwarlal Meghwal is a politician belonging to the Indian National Congress.
• His constituency is Sujangarh Churu, Rajasthan.
• He has served as Cabinet Minister of Social Justice and Empowerment in Rajasthan State Government.
• He also served as the Education Minister.

Additional Information

• Ministry of Social Justice and Empowerment:
  • It is responsible for welfare, social justice, and empowerment of marginalized sections of society like SCs, STs, and LGBTQ, etc.
  • At the centre, Thaawar Chand Gehlot is the Minister of Social Justice and Empowerment.
• Rajasthan:
  • Lok Sabha seat: 25
  • Number of Constituencies: 200