An important ore of chromium is ?
An important ore of chromium is ?
A. Argon
B. Chromite
C. Mirage
D. Diamond
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In Space, our Body_______?
In Space, our Body_______?
A. Gains Weight
B. Loses Weight
C. No Change
D. Little ChangeThe Scientific Study of Caves are know as _________ ?
The Scientific Study of Caves are know as _________ ?A. Haematology
B. Speleology
C. Oology
D. OneriologyWhich layer of the atmosphere reflects radio waves back to the earth’s surface?
Which layer of the atmosphere reflects radio waves back to the earth’s surface?A. Troposphere
B. Stratosphere
C. Ozone layer
D. IonosphereThe heaviest man made element found so for is__________?
The heaviest man made element found so for is__________?A. Promethium
B. Ununoctium
C. Francium
D. TechnetiumUnunoctium is the heaviest element, but it is man-made. The heaviest naturally-occurring element is uranium (atomic number 92, atomic weight 238.0289).
A bird sitting on a high tension electric wire does not get electrocuted because:
A bird sitting on a high tension electric wire does not get electrocuted because:A. Sit has high resistance
B. the body is earthed
C. it does not form a closed path for the flow of current
D. its feet are good insulatorslightest metal is__________?
lightest metal is__________?A. Lithium
B. Sodium
C. Magnesium
D. AluminiumThe lightest or least dense metal that is a pure element is lithium, which has a density of 0.534 g/cm3. This makes lithium nearly half as dense as water, so if lithium was not so reactive, a chunk of the metal would float on water.