Question Discussion & Solution

The correct answer is 4°C.

• Freezing of Water:
  • As water freezes, cold water (or ice formed) comes on the surface and warm water goes down.
  • Since the freezing temperature of the water is 0ºC or 273 K.
  • So water at the bottom should be at a higher temperature.
  • Water density at 4ºC is more than the density of water at 0ºC, hence the correct option is 4ºC.

​Key Points

• Reason of low temperature at bottom of the top layer:
  • This is due to the process of convection.
  • When the temperature of the water at the top layer reaches the freezing point, it is converted to ice.
  • But ice is lighter than water, so it will not sink to the bottom.
  • So there will be ice on the top surface and water would remain at the bottom of the lake. 

Judge is the head in the court while the Principal is the head in a college.

The correct answer is Save As.

Key Points

Save and Save As are the two options for saving a file in Word.

• These choices operate in a similar manner, with a few key distinctions.

Save:

• You'll use the Save command to save your changes when you're creating or editing a document.
• The majority of the time, you'll use this command.
• You'll only have to specify a file name and location the first time you save a file.
• After that, you may save it with the same name and location by using the Save command.

Save As:

• Save As command will be used to make a copy of a document while maintaining the original.
• When you choose Save As, you'll need to give the cloned version a new name and/or location.

​

The correct answer is Amlanand Ghosh.

Key Points

• Prof Amlanand Ghosh excavated the Kalibangan site in 1952.
• The Kalibangan civilization is supposed to older than 4000 BC.
• This Rajasthan civilization was the first metropolis state in India.
• Kalibangan lies along with the left Bank of the dried-up bed of river Ghaggar.
• The site contains both pre-Harappan and Harappan remains, and therein can be seen the transition between the two cultures.
• Although the pre-Harappan culture worked copper and produced pottery, it had no writing system, and its ruins lack the orderly layout and use of baked brick that is found in the later Harappan sites.
• The Harappan remains include a cemetery and a fortified citadel. 

Additional Information

• Ratna Chandra Agrawal: 
  • Bhinmal Civilization was first founded by Ratna Chandra Agrawal in 1953-54 AD.
  • Bhinmal civilization is founded in the Jalore District of Rajasthan.
• Ratan Lal Mishra: 
  • Ganeshwar civilization was first founded in 1977 by historian Ratan Lal Mishra.
  • This Ganeshwar civilization is more than 4000 years old and the estimated time period was 2500 – 2000 BC.