Main Subjects
Main Subjects MCQs With Answers
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Which type of coal has the highest carbon content and the highest heating value?
AAnthracite
BLignite
CPeat
DBituminous
The greenhouse effect occurs because certain gases in the atmosphere trap which kind of radiation given off by the Earth’s surface?
AUltraviolet radiation
BInfrared (heat) radiation
CGamma radiation
DX-rays
In which layer of the atmosphere do almost all weather events, such as clouds, rain and storms, take place?
AStratosphere
BMesosphere
CTroposphere
DThermosphere
The Chipko Movement, in which villagers hugged trees to stop them from being cut down, is associated with:
AForest conservation
BWildlife hunting rights
CConstruction of dams
DAnti-nuclear protest
PM2.5, a key measure of air pollution and smog, refers to particulate matter with a diameter of:
A2.5 millimetres or less
B25 micrometres or more
C2.5 micrometres or less
D2.5 centimetres or less
The ozone layer protects life on Earth mainly by absorbing which type of radiation from the Sun?
AInfrared radiation
BUltraviolet radiation
CVisible light
DRadio waves
In which province of Pakistan is the Gharo–Keti Bandar wind corridor, home to wind farms such as those at Jhimpir, located?
ABalochistan
BPunjab
CSindh
DKhyber Pakhtunkhwa
In which unit is the thickness (total amount) of the ozone layer measured?
ADecibel
BRichter
CDobson Unit
DPascal
The Ramsar Convention (1971) is an international treaty for the conservation of:
AThe ozone layer
BWetlands
CDeserts
DOcean fisheries
Most solar (photovoltaic) cells are made from which semiconductor material?
ACopper
BAluminium
CGraphite
DSilicon