Igneous rocks are also caused primary rock because

The saline soils can be reclaimed by
1. providing good drainage.
2. applying lime or gypsum.
3. cultivating salt resistant crops.
Select the correct answer using the codes given below.

Generally saline lakes are found in semi-arid/ arid regions because

With reference to plate margins, consider the following statements :
1. New oceanic crust is continuously formed at convergent plate margins.
2. At divergent plate margin crust is neither created nor destroyed.
Which of the statements given above is/are correct ?

The “land not available for cultivation” under land use categories includes
1. lands used for settlement.
2. barren lands like deserts.
3. fallow lands
4. grazing lands.
Select the correct answer using the codes given below.

With reference to weathering, consider the following statements :
1. Weathering involves large-scale transport of weathered materials.
2. Weathering is a static process.
Which of the statements given above is/are correct ?

Which of these pairs about rivers and their tributaries are correctly matched ?
1. Purna : Narmada
2. Tungabhadra : Godavari
3. Betwa : Yamuna
Select the correct answer using the codes given below.

The products from forests are classified as major and minor. Which of the following is/are MAJOR forest produce?
1. Wood
2. Bamboo
3. Tendu Leaves
Select the correct answer using the codes given below.

Many places in India are famous for particular minerals. Which of these pairs are correctly matched ?
1. Zawar : Uranium
2. Khetri : Copper
3. Balaghat : Manganese
4. Jaduguda : Zinc
Select the correct answer using the codes given below.

With reference to layers of ionsphere, consider the following statements :
1. During day time, D layer’s density is less compared to E and F layer.
2. High-frequency radiowaves are reflected from the D layer.
Which of the statements given above is/are correct ?