* Mohenjodaro was situated on the banks of the Indus river.

* It was one of the largest settlements of the ancient Indus Valley Civilisation located to the west of the Indus River in Larkana District, Sindh in Pakistan.

* It was also known as the mound of dead.

* King Dhruva of Rashtrakuta defeated Dharmapal near Monghyr.

* With the accession of Dhruva, about C.E. 779, a new era began in the history of Rashtrakutas. Like his predecessors, he defeated the Chalukyas of Vengi and the Gangas of Mysore and opened the struggle against the Pallavas.

* He was the first Rashtrakuta ruler to decisively intervene in the tripartite struggle being waged for supremacy in north India and defeated both the Pratihara king Vatsaraja and the Pala king Dharmapala.

* After his successful campaigns in the north, he added the emblem of Ganga and Yamuna to his imperial insignia.

* Govinda III (A.D. 793-813) ruled after Dhruva, he also made incursions into north India and fought successfully against the Pala king Dharmapala and Chakrayudha who was ruler of Kannauj.

* The Strait of Hormuz lies between Oman and Iran.

* The Strait of Hormuz channel links the Persian Gulf (west) with the Gulf of Oman and the Arabian Sea (southeast).

* The strait is 55 to 95 km wide and separates Iran (north) from the Arabian Peninsula (south).

• Both Godawari and Krishna rivers originate from Maharashtra.

• Both occupy major catchment area of Maharashtra.

• Pavitra Sangam of Krishna & Godavari rivers occurs at Vijayawada.

OPEC stands for ‘Organization of Petroleum Exporting Countries’. Currently, it has 13 members. OPEC is a permanent, intergovernmental organization, created at the Baghdad Conference in September 1960 by 5 countries namely Iran, Iraq, Kuwait, Saudi Arabia and Venezuela. The mission of OPEC is to coordinate and unify the petroleum policies of its Member Countries and ensure the stabilization of oil markets in order to secure an efficient, economic and regular supply of petroleum to consumers, a steady income to producers and a fair return on capital for those investing in the petroleum industry. Hence, option A is correct.

The first meeting of the Constituent Assembly was held in New Delhi on 9 December, 1946 to formulate the Indian Constitution. A senior member of the assembly Dr. Sachchidanand Sinha was elected as the temporary president of the assembly. Dr. Rajendra Prasad was unanimously elected as the permanent chairman. B. N. Rau was appointed as a constitutional advisor.

* The Reserve bank of India is also known as “Banker’s Bank” because it acts as a bank for all the commercial banks in India.

* It controls the supply of money & holds cash reserves. It was established on 1 April 1935.

* The headquarters of RBI is located in Mumbai.

International Tiger Day is celebrated every year on 29 July to spread awareness about the status of tiger. The decision to celebrate 29 July each year as 'International Tiger Day' was made at the St.Petersburg Tiger Conference held in 2010.

When hydrogen burns in air, it combines with oxygen to form water and in this process, emits large amounts of energy (150 Kilojoules per gram). Hydrogen acts as an excellent fuel without pollution due to its high energy supplier value. Hydrogen can be produced by thermal separation of water, light decomposition or electrical decomposition.

● When metals react with acids, Hydrogen gas is produced.

● Metal + Acid – Salt + Hydrogen

● Dilute acids react with relatively reactive metals such as magnesium, aluminium, zinc and iron.

● The name of the salt depends on the name of the acid.