Browse topic-based General Science practice sets.
2333 practice sets · Page 27 of 117
The scientific method is
a prescribed method for investigating phenomena, acquiring new knowledge.
A procedure for proposing new hypothesis
a body of techniques for investigating phenomena, acquiring new knowledge.
A method for proposing new theories.
Just as a new experiment may suggest an alternative theoretical model, a theoretical advance may suggest what to look for in some for in some experiments. Which of the following experiments can be considered to support this claim?
Davisson and Germer Experiment
experimental discovery of positron
scattering of alpha particle or the gold foil experiment
Michelson Morley experiment
Heliocentric theory proposed by Nicolas Copernicus was
replaced by circular orbits to fit the data better
replaced by elliptical orbits to fit the data better
replaced by elliptical orbits to fit the taste of new rulers of Italy
replaced by parabolic orbits to fit the data better
Wave picture of light failed to explain.
The photoelectric effect
polarization of light
diffraction of light
interference of light
Atomic and molecular phenomena are dealt with by
Newtonian Mechanics
fluid Mechanics
applied Mechanics
Quantum Mechanics
The word Science originates from the Latin verb Scientia meaning
to know
to see
to experience
to observe
Which is the most undesirable component in kerosene ?
Aromatics
n-paraffins
Naphthenes
i-paraffins
When crude oil is heated and passed through a fractionating column, the different fractions separate out according to their
melting points
densities
colours
boiling points
What two processes are carried out in oil refineries to modify the octane number of hydrocarbons?
Isomerisation and dehydrocyclisation
Electrolysis and catalytic cracking
Isomerisation and Electrolysis
Catalytic cracking and dehydrocyclisation
What is the major use for the light gasoline and naphtha fractions of crude oil?
Liquid petroleum gas
Diesel fuel
Bitumen
Petrol/motor fuel
What does LPG stand for?
Low petrol gas
Liquid petroleum gas
Liquid plastic gas
Light Petroleum gas
Viscosity index of a lubricating oil
is the measure of its flash point.
none of these.
should be low.
is the measure of variation of viscosity with temperature.
To prevent knocking in petrol engines, compounds called oxygenates are added to the petrol. Which one of the following is NOT considered an oxygenate?
Ether
Ethanol
MTBE
Octane
The fraction of crude oil used in petrol is
fuel oil
kerosene
gas oil
light gasoline
The fraction of crude oil that is used in LPG (liquid petroleum gas) is
residue
refinery gas
gas oil
naphtha
Pour point and freezing point is equal for
water
diesel
petrol
crude petroleum
Oxygenates are added to petrol. Why is this?
To decrease the toxicity of the petrol.
To increase the octane number of the petrol.
To make the petrol less flammable.
To cause catalytic cracking.
In which fraction of crude oil do pentane and its isomers occur?
Light gasoline (petrol)
Gas oil
Naphtha
Fuel oil
Hydrogen is obtained from methane by a process called
steam reforming
hydrogenation
catalytic cracking
isomerisation
High-octane compounds are used to prevent knocking in petrol engines. Which one of the following features is not present in igh-octane compounds?
Presence of C=C bonds
Presence of one or more ring structures
High degree of branching
Short chain length
