811. A substance which increases the efficiency of a catalyst is termed as:
A. Promoter
B. Activator
C. Retarder
D. Super catalyst

812. The atmospheric layers that help in radio communication are_______
A. Exosphere
B. Ionosphere
C. Troposphere
D. Stratosphere
E. Ozone layer

813. On which of the following principle the Quartz crystal in quartz watches work?
A. Photoelectric effect
B. Stark effect
C. Thermionic effect
D. Piezo-electric effect
E. None of these

814. y the deficiency of what, the Addison’s disease is caused?
A. Antidiuretic Hormone
B. Luteinising Hormone
C. Melanophore Stimulating Hormone
D. Adrenocorticotrophic Hormone

815. Biosensor is used to measure?
A. Blood glucose level
B. The body pH value
C. Amount of hemoglobin
D. Salinity in Urine

816. The planets visible to us without using a telescope are __________?
A. 3
B. 4
C. 5
D. 6

817. The average kinetic energy of the molecules of a body determines?
A. heat
B. temperature
C. internal energy
D. none

818. In eye donation, which one of the following parts of donor’s eye is utilized ?
A. Iris
B. Lens
C. Cornea
D. Retina

819. Which of the following is responsible for largest amount of oxygen on earth?
A. Peat bogs
B. Algae
C. Trees
D. None of these

820. P-waves is a term associated with__________?
A. Earthquakes
B. Oceans
C. Wind
D. Rivers

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