The recent atomic weight scale is based on
1H1
1H2
6C12
8O16
Correct Answer :
C. 6C12
Related Questions
The chemial name of Uria is
Carbamide
Chloroetane
Aneurin
None of these
The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
Earthquakes
Magnetic reversals
Hurricanses
Increased deposition of deep-sea sediments
The most important ore of Aluminium is
Calamine
Calcite
Galena
Bauxite
The colour of Emerald is
Deep Green
Violet
Prussian Blue
Yellow
Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
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Zeolites
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None of these
Apparatus invented by Archimedes is :
Pulley
Microscope
Thermemoter
Barometer
The element present in the largest amount in rocks and minerals is
Carbon
Hydrogen
Aluminium
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Liquefied Petroleum gas (LPG) consists of mainly
Methane, Butane and Propane
Methane, Ethane and Hexane
Ethane, Hexane and Nonane
Methane, Hexane and Nonane
The oxide of Nitrogen used in medicine as anaesthetic is
Nitric oxide
Nitrogen dioxide
Nitrogen pentoxide
Nitrous oxide
The fastest-running terrestrial animal is
lion
man
jaguar
cheetah
The hardest substance available on earth is
Platinum
Quartz
gold
Diamond
The recent atomic weight scale is based on
1H1
1H2
6C12
8O16
Which of the following parts of the sun is easily visible only during a total solar eclipse?
core
photosphere
sunspots
corona
Earth's seasons are caused by which of the following?
The varying amount of sunspot activity
The tilt of the earth's rotation relative to the ecliptic as earth revolves around the sun
The earth's orbit around the sun as an exlipse rather than a circle
The rotation of during a 24-hour day
Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous glass called
Carbon Monoxide
Phosgene
Phosphine
None of these
Bromine is
A Black solid
A red liquid
A highly inflammable gas
colourless gas insoluble in water
The type of glass used in making prisms and lenses is
Pyrex glass
Soft glass
Flint glass
Jena glass
Which of the following elements is a metal
S
Ga
Se
I
The intencity of Earthquakes is measured on
Beaufort scale
Secant scale
Mercalli scale
Richter scale
Glass is made from the mixture of
Quartz and mica
Sand and salt
Sand and silicates
None of these
The speed of light with the rise in the temperature of the medium
Increases
Remains unaltered
Drops sharply
Decreases
Epoxy resins is used as
Adhesives
Detergents
Insecticides
Moth repellants
The solar eclipse occurs when
the sun comes in between the moon and the earth
the moon comes in between the sun and the earth
the earth comes in the between the sun and the moon
None of the above
The removal of top soil by water or wind is called
Soil erosion
Soil wash
Silting of soil
Soil creep
Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
A piece of iron that is not a permanent magnet
The north pole of another permanent magnet
A positively charged glass rod
A negatively charged rubber rod
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Desiccation
Efflorescence
Deliquescene
Osmosis
Cell membrane is
permeable
semipermeable
selectively permeable
impermeable
Which of the following is commonly called a polyamide ?
Orion
Terylene
Rayon
Nylon
Lightening cause rainfall because
It activate H2O molecule
Photo-electricity reaction starts
Some of the gas molecules become bigger
It cause combination of oxygen and nitrogen
Which of the following elements is non-radioactive?
Uranium
Plutonium
Thorium
Zirconium