The tree which sends down roots from its branches to the soil is known as:

• 1.      A.Oak
• 2.      B.Pine
• 3.      C.Banyan
• 4.      D.Palm

Electric bulb filament is made of

• 1.      A.Copper
• 2.      B.Aluminum
• 3.      C.Lead
• 4.      D.Tungsten

Brass gets discoloured in air because of the presence of which of the following gases in air?

• 1.      A.Oxygen
• 2.      B.Hydrogen Sulphide
• 3.      C.Carbon dioxide
• 4.      D.Nitrogen

Which of the following is a non metal that remains liquid at room temperature?

• 1.      A.Phosphorous
• 2.      B.Bromine
• 3.      C.Chlorine
• 4.      D.Helium

Chlorophyll is a naturally occurring chelate compound in which central metal is

• 1.      A.Copper
• 2.      B.Magnesium
• 3.      C.Iron
• 4.      D.Calcium

Which of the following is used in pencils?

• 1.      A.Graphite
• 2.      B.Silicon
• 3.      C.Charcoal
• 4.      D.Phosphorous

Which of the following metals forms an amalgam with other metals?

• 1.      A.Tin
• 2.      B.Mercury
• 3.      C.Lead
• 4.      D.Zinc

Chemical formula for water is

• 1.      A.NaA1O2
• 2.      B.H2O
• 3.      C.Al2O3
• 4.      D.CaSiO3

The gas usually filled in the electric bulb is

• 1.      A.Nitrogen
• 2.      B.Hydrogen
• 3.      C.Carbon dioxide
• 4.      D.Oxygen

Washing soda is the common name for

• 1.      A.Sodium Carbonate
• 2.      B.Calcium Bicarbonate
• 3.      C.Sodium Bicarbonate
• 4.      D.Calcium Carbonate