Question : What do you understand by the term "Dark Fermentation"?

Option 1: It is a method to dispose of nuclear waste.

Option 2: It is a method to produce methane from organic wastes.

Option 3: It is a method to reduce COD in the atmosphere.

Option 4: It is a method to produce hydrogen as fuel from wastewater.

Question : If the density of oxygen is 16 times that of hydrogen, what will be their corresponding ratio to the velocity of sound?

Option 1: 4:1

Option 2: 2:1

Option 3: 1:16

Option 4: 1:4

Question : When Hydrogen starts burning in air ,it produces?

Option 1: Ammonia

Option 2: water

Option 3: Methane

Option 4: Carbon dioxide

Question : In which region of the electromagnetic spectrum does the Lyman series of hydrogen atoms lie?

Option 1: Visible

Option 2: Infrared

Option 3: Ultraviolet

Option 4: X-ray

Question : Select the most appropriate ANTONYM of the underlined word.

The Tokyo Games accelerated energy policies in Japan, demonstrating how they could make steps towards a low-carbon economy by powering the athletes' village with hydrogen from clean, green sources.

Option 1: inspiring

Option 2: exploring

Option 3: collating

Option 4: hiding