221.

What are the main components of Bronze Alloy?

• Copper and Zinc

• Copper and Tin

• Zinc and Nickel

• Aluminium and Tin

Which one of the following is not a type of coal?

• Anthracite

• Lignite

• Peat

• Siderite

Fog, Clouds, mist are examples of................

• Aerosol

• Solid sol

• Foam

• Gel

Which of the following is not a primary greenhouse gas in the earth's atmosphere?

• Methane

• Ozone

• Nitrous oxide

• Hydrogen

Which blood group is universal donor?

• O⁺

• O^-

• AB^-

• AB⁺

.............acts as a shield absorbing ultraviolet radiation from the sun.

• Chlorofluorocarbons

• Stratosphere

• Ozone hole

• Greenhouse

Which of the following was the winner of the Grammy Awards 2016 'Record of the year'?

• Uptown Funk

• Really Love

• Thinking Out Loud

• Blank Space

What is the process of melting also called?

• Fusion

• Galvanisation

• Cyrstallisation

• Evaporation

What is the name of the acid in grapes?

• Lactic acid

• Formic acid

• Acetic acid

• Tartaric acid

Which fibre is also called as artifical silk?

• Nylon

• Rayon

• Polyester

• Acrylic