Question Discussion & Solution

The correct answer is Methane.

Key Points

• Methane (CH4)
  • It is the simplest hydrocarbon consisting of one carbon atom and four hydrogen atoms and the simplest hydrocarbon, is the most abundant hydrocarbon pollutant.
  • It is a powerful greenhouse gas.
  • Major natural sources of methane include emissions from wetlands, and oceans and from the digestive processes of termites.
  • Methane is more than 25 times as potent as carbon dioxide at trapping heat in the atmosphere.

Additional Information

• Butane is a gaseous component (at room temperature and atmospheric pressure) of the Alkane group having the chemical formula is C4H10.
• It is a colourless, highly flammable, and easily liquefied gas.
• In the abundance of oxygen, it forms Carbon dioxide, but if limited oxygen is available, then it forms Carbon Monoxide.

2C4H10 + 13O2 → 8CO2 + 10H2O                   (oxygen in plenty)

2C4H10 + 9O2 → 8CO + 10H2O                      (oxygen is limited)

• Uses –
  • Gasoline blending
  • Fuel gas
  • Fragrance extraction solvent
  • Feedstock for the manufacture of ethylene and butadiene
  • Ingredient for synthetic rubber
  • Isobutane to enhance the Octane number of gasoline in refineries.
• A propane molecule has three carbon atoms and eight hydrogen bonds and has the formula C3H8. 
• Propane is a colourless, easily liquefied, gaseous hydrocarbon (compound of carbon and hydrogen) and the third member of the paraffin series following methane and ethane.
• Propane is produced as a by-product of two other processes, natural gas processing and petroleum refining.
• It is separated in large quantities from natural gas, light crude oil, and oil-refinery gases and is commercially available as liquefied propane or as a major constituent of liquefied petroleum gas (LPG).
• Uses: 
  • It is used in LPG, also used as biofuel in buses and taxis and it is also the main gas in blowtorches and for hot air balloons.
  • Propane gas has become a popular choice for barbecues and portable stoves because its low boiling point makes it vaporize as soon as it is released from its pressurized container.
• The chemical formula of Ethane is C2H6.
• It is a colourless, odourless gas at normal temperature and pressure.
• It is extracted from natural gas on an industrial scale and is a petrochemical by-product of petroleum refining.
• Michael Faraday first synthesized it in 1834, using the electrolysis of a solution of potassium acetate.

The correct answer is Mr. Bulaki Das Kalla.

• As of June 2020, Mr. Bulaki Das Kalla is the Cabinet Minister of Culture and Archeology in Rajasthan.

Key Points

• Mr. Bulaki Das Kalla's constituency is Bikaner, Rajasthan.
• He is associated with the Indian National Congress.
• He is currently holding the portfolio of Cabinet Minister of Energy, Public Health & Engineering, Ground Water, Art, Literature, Culture & Archeology.

Additional Information

• Mr. Sachin Pilot is the Deputy Chief Minister of Rajasthan.
• Mr. Ashok Gehlot is the Chief Minister of Rajasthan.
• Mr. Shanti Kumar Dhariwal is the Minister of Local Self Government, Urban Development & Housing Department, Rajasthan.

The correct answer is option 4) i.e. ∞

CONCEPT:

• ​The time period of a pendulum is given by the equation:

​\(\Rightarrow T = 2\pi\sqrt{\frac {L}{g}}\)

Where L is the length of the string of pendulum and g is the acceleration due to gravity.

EXPLANATION:

• At a height of 900 km from the earth's surface gravity is absent.

Therefore, g = 0.

Substituting g = 0,

\(\Rightarrow T = 2\pi\sqrt{\frac {L}{0}} = ∞\)

Thus, the time period of the pendulum at a distance of 900 km from the Earth will be infinite.

The code for ‘IRONIC’ would be ‘#!?@#&’.

The correct answer is ​Shaheed-e-Azad Bhagat Singh.

Key Points

• Shaheed-e-Azad Bhagat Singh (1954) is the first film based on Bhagat Singh’s life.
  • The movie was directed by Jagdish Gautama and had Prem Abeed, Jairaj, Smriti Biswas, and Ashita Mazumdar in lead roles.
  • The film also boasted of the classic patriotic song ‘Sarfaroshi Ki Tamanna Ab Hamaare Dil Mein Hai’ in Mohammed Rafi’s melodious voice. 
• Shaheed Bhagat Singh (1963):
  • Almost a decade later, Shammi Kapoor appeared in and as Shaheed Bhagat Singh.
  • The film was directed by KN Bansal and besides Shammi Kapoor, the movie starred Shakeela, Premnath, and Achla Sachdev in prominent roles.
• Shaheed (1965):
  • At the 13^th National Awards, the film won awards for Best Feature Film in Hindi and Nargis Dutt Award for Best Feature Film on National Integration and Best Story.
  • ‘Shaheed’ had the entire nation humming to its patriotic compositions like ‘Aye watan aye watan humko teri kasam’, ‘Sarfaroshi ki tamanna’, ‘O mera rang de basanti chola’ and ‘Pagadi sambhaal jattaa’ with the voices of Mukesh, Mohammed Rafi, Lata Mangeshkar and Manna De gracing the vocals. 
• The Legend of Bhagat Singh (2002):
  • Rajkumar Santoshi directed Ajay Devgn as Bhagat Singh and focused on how Singh came to develop his independent views against the British Raj and the development of his ideologies, right from witnessing the death of Lala Lajpat Rai to the reopening of the Saunders’ murder case.
  • The film went on to win two National Awards, including the Best Feature Film in Hindi and Best Actor for Ajay Devgn.