Explanation

 Brontophobia is the irrational and intense fear of thunder.

 The term comes from the Greek words "bronte" (thunder) and "phobos" (fear). 

Astraphobia, also known as astrapophobia, brontophobia

 Ergophobia: Fear of work

“Heliophobia” is the fear of Sunlight

Cibophobia is the fear of Food

Xenophobia is the fear of Stranger or Foreigner

“Agoraphobia” is the fear of Public Place

“Musophobia” is the fear of Rats

“Achluophobia” is the fear of Darkness

“Dendrophobia” is the fear of Trees

Explanation

 Copper was first used by man over 10,000 years ago

The period following the use of copper is sometimes referred to as the Copper Age or Chalcolithic Age. 

Explanation

Gandhi-Irwin Pact, agreement signed on March 5, 1931

Between Mohandas K. Gandhi, leader of the Indian nationalist movement

Lord Irwin (later Lord Halifax), British viceroy (1926–31) of India

Participants: Mahatma Gandhi, George Montagu 

Date: March 5, 1931

Location: India

Explanation

The Khaksar movement  was a social movement based in Lahore, Punjab

The Khaksar movement was established by Allama Inayatullah Khan Mashriqi 

established in: 1931

The Khaksars opposed the partition of India and favored a united country

Mashriqi had said in 1931 that the Khaksar movement had three distinct objectives

1. to emphasize the idea of the superiority of God
2. unity of the nation
3. service to mankind

Explanation

 Landi Kotal is the main shopping centre for the Shalmani, Shinwari, Afridi, and Mulagori tribes of Khyber Agency.

Explanation

Hydrogen and helium are the two lightest gases, both significantly lighter than air. 

Hydrogen: Considered the lightest gas.

Helium: Also lighter than air, but twice as heavy as hydrogen.

Air: Has a higher molecular weight than both hydrogen and helium. 

Explanation

Jabir Ibn Hayyan, also known as Geber

He is the Muslim scientist credited with the discovery of sulfuric acid, nitric acid, and hydrochloric acid.

He is widely recognized as the "father of Arab chemistry".

Explanation

The plants and vegetation of a region are collectively known as flora.

Flora refers to the plant life occurring in a particular region or time. 

Explanation

Brussels is situated on the banks of the Senne River

It is also known as Zenne in Dutch

It is a part of both the French Community of Belgium and the Flemish Community

Explanation

Narada Falls is a waterfall in Mount Rainier National Park

It is located in the US state of Washington. 

The waterfall was originally called Cushman Falls, but the name was not widespread

The falls were named Narada by Arthur F. Knight during a week-long trip to Mount Rainier in 1893