Question Discussion & Solution

Concept:-

 Single linked list:

This list consists of a number of nodes in which each node has a next pointer to the following element. The link of the last node in the list is NULL, which indicates the end of the list.

Calculation:-

After perform ((Start → Next) → Next) the current link transfer to the third node of linked. And Third node data value is 128.

Hence the correct answer is 128.

Rohit started walking towards the west.

He walked for 300 m and turned to his right from the post office.

From there, he walked for 200 m.

He then turned to the left and walked a few steps.

Rohit is now standing in front of West direction.

Hence, "West" is the correct answer.

• In 1837, Charles Babbage proposed the first general mechanical computer, the Analytical Engine; The Analytical Engine contained an ALU (Arithmetic Logic Unit), basic flow control, punch cards, and integrated memory
• Charles Babbage is credited with inventing the first mechanical computer that eventually led to more complex electronic designs, though all the essential ideas of modern computers are to be found in Babbage's analytical engine; Hence regarded as the father of computer science
• Blaise Pascal (1623 – 1662) was a French mathematician, physicist, inventor, writer and Catholic theologian
• John Napier (1550 – 1617) was a Scottish landowner known as a mathematician, physicist, and astronomer; He is best known as the discoverer of logarithms

The correct answer is Uttarakhand

Key Points

• Nanda Devi is India's second-highest mountain peak, after Kanchenjunga.
  • But it is the highest mountain peak entirely located in India.
  • Height: 7,817 metres
  • Location: Uttarakhand.

Additional Information

About Uttarakhand (as of August 2021):

• Uttarakhand, formerly Uttaranchal, state of India, located in the northwestern part of the country.
  • Uttarakhand was carved out from Uttarpradesh on 9 November 2000 as the 27th State of India.
  • It is bordered to the northwest by Himachal Pradesh, to the northeast by the Tibet Autonomous Region of China, to the southeast by Nepal, and to the south and southwest by the Indian state of Uttar Pradesh.
  • Its capital is the northwestern city of Dehra Dun.
  • Governor: Baby Rani Maurya
  • CM: Pushkar Singh Dhami
  • State flower: Saussurea obvallata
  • State Bird: Alpine musk deer
  • National park: Valley of Flowers National Park (UNESCO sites), Rajaji National Park, Nanda Devi National Park, Gangotri National Park, Jim Corbett (1st National park in India).

The correct answer is 1 i.e. propanal.

Concept:

IUPAC nomenclature:

• A systematic method of naming organic compounds.
• Naming is based on their structures.
• It is devised by the International Union of Pure and Applied chemistry.
• Many rules are followed while naming the compounds and it is different for different functional groups.
• The rules are known as IUPAC rules.

Explanation:

• This compound contains 3 carbon atoms, so its parent alkane is propane.
• It also contains an aldehyde group (-CHO-) group which is indicated by using 'al' as suffix or ending.
• So by replacing the last 'e' of butane with 'al', the name becomes propanal.
• Thus, the IUPAC name of the compound CH3CH2CHO is propanal.
• The common name of propanal is Propionaldehyde.

​Additional Information

• The chart for priority order and suffix name is given below: