Science [ Level - Hard]

Moon takes ____ days to complete one revolution around the earth

• 25

• 27

• 26

• 28

Answer explanation

Mars takes 687 days to revolve the sun

Telescope was invented by _______

• Hans Lippershey

• Galileo

• Nicolus Coppernicus

• Ptolomu

Answer explanation

Several men laid claim to inventing the telescope, but the credit usually goes to Hans Lippershey, a Dutch lensmaker, in 1608.

Stars mainly consists of

• Oxygen and hydrogen

• Hydrogen and helium

• Oxygen and helium

• Carbon and nitrogen

Answer explanation

Every star you see in the night sky is bigger and brighter than our sun.

Who discovered insulin?

• Karl Benz

• Louis Pasterur

• Neils Bohs

• F.G.Bating

Answer explanation

1921, Dr. Frederick G. Banting became the first individual to isolate the secretions from the islet cells and tout them as a potential treatment for diabetes.

Who invented dynamite?

• Alfred Nobel

• Galileo Galilee

• Thomas Alva Edison

• Charles Darwin

Answer explanation

Alfred invents “dynamite”

Alfred found, through his experiments, that mixing nitroglycerine with a fine sand called kieselguhr would turn the liquid into paste which could be shaped into rods. These rods could then be inserted into drilling holes. The invention was made in 1866.

Which elements is found in the highest amount in the universe?

• Helium

• Hydrogen

• Nitrogen

• Oxygen

Answer explanation

Helium is the second most abundant element in the Universe.

The metal which can be cut with a knife

• Sodium and potassium

• Barium and calcium

• Sodium and mercury

• Potassium and calcium

Answer explanation

Copper, Aluminium, and Iron are hard metals with iron being the hardest amongst the given options. They cannot be cut easily with a knife as they have stronger metallic bonds.

The pigment responsible for Browning of apples is

• Hydrated(II)Oxide

• Melanin

• Starch

• Ozone

Answer explanation

the oxidation process begins and the potatoes turn brown.