Most plants absorb nitrogen in the form of:

• proteins
• nitrates and nitrites
• urea
• nitrates, nitrites and urea
Correct Option: D  [ nitrates, nitrites and urea ]

Remark:

Which among the following is present in refrigerator?

• Carbon dioxide
• Methane
• Helium
• Chlorotluorocarbon
Correct Option: D  [ Chlorotluorocarbon ]

Remark: Chlorotluorocarbons (CFCs) have recently been phased out and newer refrigerators will not contain CFCs. The use of CFCs was phased out by 2000 under the Montreal Protocol.

Bilirubin and Biliverdin are the pigments found in :

• Bile
• Plasma
• RBC
• Muscles
Correct Option: A  [ Bile ]

Remark:

Magnification produced by a rear view mirror fitted in vehicles:

• is less than the object
• is more than the object
• is equal to the object
• can be more or less than the object depending upon the position of object in front of it.
Correct Option: A  [ is less than the object ]

Remark:

One kilometre is equal to how many miles?

• 0.84
• 0.5
• 1.6
• 0.62
Correct Option: D  [ 0.62 ]

Remark:

Who discovered electromagnetic nature of light?

• Young
• Snell
• Newton
• Maxwell
Correct Option: D  [ Maxwell ]

Remark:

Which wave is being used by common TV remote control ?

• Radio waves
• Micro waves
• Infrared waves
• Ultrasonic waves
Correct Option: C  [ Infrared waves ]

Remark:

A large collection of files are called:

• folder
• records
• sectors
• database
Correct Option: D  [ database ]

Remark:

Which of the following is not an element ?

• Oxygen
• Nitrogen
• Hydrogen
• Marble
Correct Option: D  [ Marble ]

Remark:

What is reason for using red light as a stop signal ?

• Long wavelength
• Short wavelength
• Chromogenic effect
• Infra Red
Correct Option: A  [ Long wavelength ]

Remark: