The element common to all acids is :

• Oxygen
• Hydrogen
• Nitrogen
• Sulphur
Correct Option: B  [ Hydrogen ]

Remark:

Which of the following is chiefly present in LPG?

• Methane
• Ethane
• Propane
• Butane
Correct Option: D  [ Butane ]

Remark:

Saliva helps in the digestion of:

• fats
• starch
• proteins
• vitamins
Correct Option: B  [ starch ]

Remark:

The rusting of the iron is the example of:

• Oxidation
• Reduction
• Polymerisation
• Galvanization
Correct Option: A  [ Oxidation ]

Remark:

Big Bang theory explains:

• Origin of Universe
• Origin of Sun
• Laws of Chemistry
• Laws of History
Correct Option: A  [ Origin of Universe ]

Remark:

The phenomenon involved in propagation of light waves throuhg optical fibres is :

• Dispersion of light
• Scattering of light
• Total internal reflection of light
• Refraction of light
Correct Option: C  [ Total internal reflection of light ]

Remark:

The nearest planet to the sun is:

• Venus
• Mars
• Mercury
• Jupiter
Correct Option: C  [ Mercury ]

Remark:

The virus infection causes AIDS is known as

• HIV
• HID
• DIV
• None of theses
Correct Option: A  [ HIV ]

Remark:

The amount of light entering into eye can be controlled and regulated by ___________ .

• Sclera
• cornea
• pupil
• retina
Correct Option: C  [ pupil ]

Remark:

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

• Phosphorous
• Bromine
• Chlorine
• Helium
Correct Option: B  [ Bromine ]

Remark: