Developing countries like India has an adverse sex ratio of less than 1000 while in developed countries it is more than 1000. [Sex ratio: It is the number of females in a country for every 1000 males]
What is/are the possible reason/s with reference to India?
1) Social disadvantages that female face like female foeticide, female infanticide, domestic violence etc.
2) Stopping at one child ie couples restrain themselves from going for second child provided the first child born is male.
Choose the correct code from the following.

Consider the following statements which describe the properties of a particular metal
1. It as a valuable metal of which the major ore is Wolfram.
2. It is self hardening which it imparts to the steel when alloyed with the steel.
3. Steel when alloyed with this metal, is used in manufacturing of ammunitions, armour plates, heavy guns etc.
4. Its alloys are heat resistant, corrosion resistant and hardfacing.
Choose the correct metal from the options

Continental Drift theory by Wegener changed the perceptions about the Earth’s crust.
Consider the statements regarding this theory.
1) Sialic masses used to float over the Sima without any resistance being offered by Sima.
2) Earlier all land masses were united to form a massive landmass known as ‘Panthalasa’.
3) Ocean floors were considered to be stable and never moved.
Choose the correct statement/s from the following.

Consider the statements regarding different types of plates in ‘Plate Tectonic Theory’.
1) Destructive plate boundary is one in which continuous upwelling of molten material ie lava takes place.
2) Divergent plate boundary is one which two plates slide past one another thus neither creating nor destroying continental landmass.
3) Convergent plate boundary is one in which one plate overrides the other plate.
Choose the correct statement/s from the following code.

Consider the statements regarding earthquake (seismology).
1) Primary waves are analogous to sound waves and it can travel through liquid medium.
2) Secondary waves are analogous to water ripples and it cannot pass through liquid medium.
3) Surface waves are most destructive and slowest among the three waves (primary, secondary, surface waves).
Choose the incorrect statement/s from the following codes.

Consider the statements regarding volcanoes.
1) More than 95% of the global volcanoes are along the plate boundaries.
2) High intensity volcano types like Visuvius type, Peelean type etc are concentrated in the convergent plate boundaries.
3) Low intensity volcano like Mid Atlantic Ridge are concentrated in the divergent plate boundary regions.
Choose the correct statement/s from the following codes.

Every relief can be classified into different types of reliefs.
Match the following.
1) 1st Order relief --- continental plates.
2) 2nd Order relief --- plains and deltas.
3) 3rd Order relief --- fold mountains.
Choose the correctly matched pair from the following codes.

In Tamil Nadu region, evergreen forests are found despite hot and dry summers with temperature of about 28 degree Celsius.
What is/are the reason/s?October to December.

In which part of the ocean does the typical example of reversal of ocean current can be observed which is guided by the planetary wind system?

Mass wasting or mass movement is a common phenomenon at the foothills of big,steep mountains like Himalayas, Atlas etc.
Consider the following statements regarding mass wasting.
1) Rock debris that moves down the hill is mainly derived from weathering.
2) The rock debris moves down mainly because of earthquake, volcano, moving water etc.
Choose the correct statement/s from the following codes.