The location and energy of an electron in an atom can be specified by
Atomic number
Atomic mass
Quantum numbers
None of these
Correct Answer :
C. Quantum numbers
Related Questions
Pollination by birds is called
autogamy
entomophily
anemophily
ornithophily
The colour of Emerald is
Deep Green
Violet
Prussian Blue
Yellow
Old-written material, which cannot be read easily can be read by
None of these
Ultraviolet rays
Infra Red rays
Cosmic Rays
The element present in the largest amount in rocks and minerals is
Carbon
Hydrogen
Aluminium
Silicon
The metal that is present in Photo Films is
Silver
Magnesium
Platinium
Mercury
The fastest acting enzyme in the biological kingdom is
amylase
lipase
carboxypeptidase
carbonic anhydrase
Epoxy resins is used as
Adhesives
Detergents
Insecticides
Moth repellants
Polythene is industrially prepared by the polymerisation of
styrene
methane
ethylene
acetylene
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 property of a substance to absorb moisture from the air on exposure is called
Desiccation
Efflorescence
Deliquescene
Osmosis
Apparatus invented by Archimedes is :
Pulley
Microscope
Thermemoter
Barometer
The most important ore of Aluminium is
Calamine
Calcite
Galena
Bauxite
According to Daltons atomic theory the smallest particle which can exist independently is
An atom
A cation
A molecule
An anion
Nitrification means
Conversion of nitrogen to nitric acid.
Production of nitrogen from air
Convert the atmospheric nitrogen to effective nitrogen compound.
Liquifaction of nitrogen
Which of the following is commonly called a polyamide ?
Orion
Terylene
Rayon
Nylon
The metallic constituents of hard water are
Calcium, magnesium and iron
Magnesium, Calcium and tin
Magnesium, tin and iron
Iron, tin and calcium
Quartz crystals normally used in quartz clocks etc. is chemically
A mixture of B and C
Silicon dioxide
Germenium dioxide
Sodium Silicate
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 is the lightest metal ?
Mercury
Lithium
Lead
Silver
In a certain electronic circuit the output is positive if input 1 is positive and input 2 is zero. If both inputs are positive the output is zero. This is
an AND circuit
an OR circuit
a high-pass filter
a NOR circuit
Which of the following elements is obtained from sea weeds ?
Argon
Vanadium
Iodine
Sulphur
Rust is
A mixture of FeO and Fe(OH)2
A mixture of Fe2O3 and Fe(OH)2
A mixture of Fe2O3, 3H2O and FeO
FeO only
The recent atomic weight scale is based on
1H1
1H2
6C12
8O16
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
The oxide of Nitrogen used in medicine as anaesthetic is
Nitric oxide
Nitrogen dioxide
Nitrogen pentoxide
Nitrous oxide
Water has maximum density at
0°C
-4°C
100°C
4°C
Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous glass called
Carbon Monoxide
Phosgene
Phosphine
None of these
The Panda belongs to the same family as that of
Cat
Bear
Rabbit
Dog
Which of the following elements is a metal
S
Ga
Se
I
When a gas is turned into a liquid, the process is called
evaporation
condensation
sublimation
deposition