The correct answer is citric.

• Orange juice contains citric acid due to which tastes sour.

Key Points

• Fruits that contain citric acid are called citrus fruits.
• Citrus fruits are lemon, lime, orange, Grapefruit, etc.
• The formula of citric acid is C₆H₈O₇.

Additional Information

• Oxalic acid is found in tomato.
  • Its formula is C₂H₂O₄.
• Formic acid is found in the sting of ants and bees.
  • Its formula is CH₂O₂.
• Acetic acid is found in vinegar.
  • Its formula is id CH₃COOH.

The pattern repeat alternatively.

The correct answer is Aravali Ranges.

• The oldest fold mountain ranges in the world is Aravali Ranges.

Key Points

• Aravalis are one of the world’s oldest fold mountains running in north-east to south-east direction from Delhi to Palampur in Gujarat. 
• It is an example of the relict mountain.
• Guru Shikhar is the highest peak of Aravali.
• The Aravalli Range dates back to times when the Indian Plate was separated from the Eurasian Plate by an ocean. 
• Three major rivers and their tributaries flow from the Aravalli, namely Banas, Sahibi and Luni.

Additional Information

• The Western Ghats are locally known by different names such as Sahyadri in Maharashtra, Nilgiri hills in Karnataka and Tamil Nadu and Annamalai hills, Cardamom hills in Kerala.
• The Himalayas are young fold mountains of the tertiary period, which were folded over the Tethys Sea due to inter-continental collision.
• They stretch from the Indus River in the West to the Brahmaputra River in the East.
• The Alps are the highest and most extensive mountain range system that lies entirely in Europe, and stretch approximately 1,200 km.

JVM (Java Virtual Machine) is an abstract machine. It is a specification that provides runtime environment in which java bytecode can be executed.

The correct answer is Sardar Sh. Gurmukh Nihal Singh.

Key Points

• ​Sardar Sh. Gurmukh Nihal Singh
  • He was the first Governor of Rajasthan(from 1956 to 1962) after the Abolishment of the institution of Rajpramukh (By the recommendations of the States Reorganization Commission, 1956).
  • He was also a second Chief Minister of Delhi.
• He was the longest-serving Governor in Rajasthan from 1 November 1956 to 15 April 1962.

Additional Information

• Dr. Sampurnanand
  • He was the second Chief Minister of Uttar Pradesh from 1954 to 1960.
  • He was also a second Governor of Rajasthan from 1962 to 1967.
  • He also participated in the Non-cooperation movement in 1920.
• Sardar Sh. Hukum Singh
  •           He was the third Governor of Rajasthan from 1967 to 1970.
  • He was also the third Speaker of Lok Sabha.

The correct answer is Banas river.

• Banas River is the longest river in Rajasthan.
  • It flows from the hills of the Aravalli range near Kumbhalgarh (Rajsamand) and passes through Udaipur, Chittaurgarh, Bhilwara, Ajmer, and Tonk districts and joins the Chambal river near Rameshwar in Sawai Madhopur district.
  • Banas river originates in the Khamnor Hills of the Aravalli Range, near Kumbhalgarh in Rajsamand.
  • It is also known as ‘Van Ki Asha‘ (Hope of the forest).
  • There is another river in Rajasthan with the name of Banas, which flows in the western direction and is also called as West Banas River.

Additional Information

• The Banas is a seasonal river that is often dry in the hot months, but it is still a source of irrigation.
• Its main tributaries are the Berach and Kotari rivers.