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Which instrument is used to measure depth of ocean?
Speed of sound is maximum in which among the following?
What is the organ responsible for hearing?
What kind of disease can you get from a dog bite?
Reflex action is controlled by
The diameter of the reﬂecting surface of a spherical mirror is called a/an?
The element which is commonly used in nuclear for producing electricity by nuclear fission is
Which of the following rocks is metamorphic equivalent of sandstone?
The layer of atmosphere containing much of ozone gas is
When a star becomes a singularity and has zero volume and infinite density, it is called?
The largest and strongest living bird is
The chemical name of Quartz is
Antidiuretic hormone (ADH) is secreted by one of the following glands?
The clouds float in the atmosphere because of their low
Cusec is basically a unit of which quantity?
Long-sightedness is corrected by putting
Which one of the following is used in making bullet proof materials?
The thickness of Ozone in a column air from the ground to the top of atmosphere is measured in terms of
Ozone is a molecule that contains three oxygen atoms. At any given time, ozone molecules are constantly formed and destroyed in the stratosphere. In 1913, Henri Buisson and Charles Fabry discovered the ozone layer and later its properties were studied by G.M.B. Dobson.
Which of the following is said to be the secondary plant nutrient?
Which gas contributes most of green house effect?