Question Discussion & Solution

The correct answer is Hydrogen.

Key Points

• Hydrogen has atomic number 1 and is placed in group 1 along with alkali metals.
• It is the first element in the periodic table.

​Additional Information

• Hydrogen was discovered by Henry Cavendish.
• Hydrogen gas is called the fuel of the future.
• The most abundant element in the universe is Hydrogen.
• The most abundant element on earth's crust is Oxygen.
• Hydrogen is the 'lightest element' in the periodic table.
• Lithium is the 'lightest metal' in the periodic table.

The correct answer is Bhairo Singh Shekhawat.

• Bhairo Singh Shekhawat who was the Chief Minister of Rajasthan took over as the 11^th Vice President of India.

Key Points

• Bhairo Singh Shekhawat was the Vice President of India from August 2002 –21 July 2007.
• He worked under the presidentship of Dr. A. P. J. Abdul Kalam.
• He served as the Chief Minister of Rajasthan in the following durations 1977 to 1980, 1990 to 1992, and 1993 to 1998.
• He was associated with Bhartiya Janta Party.

Additional Information

• Pratibha Patil served as the 12^th President of India from 2007 to 2012.
• Haridev Joshi was the 11^th Chief Minister of Rajasthan.
• Heera Lal Shastri was the first chief minister of Rajasthan.
• Mr. Ashok Gehlot is the current Chief Minister of Rajasthan.
• Mr. Sachin Pilot is the current Deputy Chief Minister of Rajasthan.

All given numbers are cube except 400. 400 is a square of 20.

President is the head of the Union Executive of a country.

Similarly,

The correct answer is China.

Key Points

• The Russia and China joint naval exercises “Joint Sea 2021” has kicked off at Russia’s Peter the Great Gulf, in the Sea of Japan, on October 14, 2021.
• The exercises will culminate on October 17, 2021.
• The drill is being carried out as part of ‘Joint Sea’ 2021, the series of bilateral naval exercises that have been taking place between the two services since 2012.

Additional Information

•  Important Exercises between India and other countries: