Geography — Prelims MCQs

Why are dewdrops not formed on a cloudy night?

Consider the following statements regarding karst topography:

1. It develops mainly where thick beds of limestone or dolomite are dissolved by rainwater that has turned weakly acidic after absorbing carbon dioxide.
2. Stalactites grow downward from the roof of a cave while stalagmites build upward from its floor, and the two may eventually join to form a pillar.
3. Sinkholes, also called dolines, are surface depressions that may form either by solution or by the collapse of a cave roof, and several of them merging produce a larger depression called an uvala.
4. In a well-developed karst region much of the drainage is underground, with surface streams disappearing into swallow holes and re-emerging further away as springs.

How many of the statements given above are correct?

Consider the following pairs of mineral-producing localities and the States in which they lie:

1. Bailadila — Chhattisgarh
2. Panna — Madhya Pradesh
3. Khetri — Haryana
4. Talcher — Jharkhand

How many of the pairs given above are correctly matched?

Consider the following statements about the cropping seasons and crops of India:

1. Kharif crops are sown with the onset of the south-west monsoon and harvested around September and October, and rice, bajra and cotton are among them.
2. Rabi crops are sown in the winter months and harvested between April and June, and wheat, barley, gram and mustard are among them.
3. Zaid is a short season between the harvest of rabi crops and the sowing of kharif crops, during which watermelon, muskmelon, cucumber and fodder crops are raised.
4. Jowar and bajra are grown mainly in the heavy-rainfall districts of the north-eastern States, because these millets need soils that remain moist through the year.

How many of the statements given above are correct?

Salinity is not spread evenly across the seas, varying both with latitude and with depth. Which one of the following statements about its distribution is correct?

With reference to inversion of temperature in the atmosphere, which one of the following statements is correct?