Question

ASSERTION AND REASON (1×12=12)
DIRECTION : Mark the option which is most suitable :
(a) Both assertion and reason are true and reason is the correct explanation of assertion.
(b) Both assertion and reason are true but reason is not the correct explanation of assertion.
(c) Assertion is true but reason is false.
(d) Both assertion and reason are false.


18. Assertion(A) : The crude oil reserves are going down for the entire world, and the countries need to find substitute
fuel for crude oil.
Reason(R) : A country that is dependent on imports for crude oil will demand more crude oil in the future.
a b c d
19. Assertion(A): Zilla Parishad Chairperson is the political head of the zilla parishad.
Reason(R): Mayor is the head of municipalities.
a b c d
20. Assertion(A): A major step towards decentralization was taken in 1992 by amending the constitution.
Reason(R): Constitution was amended to make the third tier of democracy more powerful and effective.
a b c d
21.Assertion(A): Belgium and Spain has ‘holding together’federation.
Reason(R) :A big country divides power between constituent states and national government.
a b c d



MCQ

26. Read the given paragraph and answer the questions that follow
Occurrence of Soil Erosion:
Soil erosion occurs when the rate of removal of soil by water and/or wind exceeds the rate of soil formation. Generally,
rates of soil formation are very low, with profiles developing at a rate of about 1 cm every 100-400 years; assuming an
average bulk density of 1.33g cm-3
, this equates to about 0.3 – 1.3 t ha-1 a
-1
.
It is important to differentiate between natural or background erosion and erosion which has been accelerated largely
as a result of human activity. Background erosion rates are often similar to rates of soil formation at < 1.0 t ha-1 a
-1
,
although in mountainous areas they may be considerably higher. In contrast, rates of accelerated erosion commonly
exceed 10 t ha-1 a
-1 and sometimes exceed 100t ha-1 a
-1 Some of the highest soil erosion rates have been observed in
the Loess Plateau area of China and in the Himalayan foothills of Nepal, where values in excess of 200 t ha-1 a
-1 have
been recorded. Similarly, in India, gully erosion results in a loss of about 8,000 ha of land per year. The extent of soil
erosion is governed by a number of factors. Those of particular importance include erosivity of the eroding agent,
erodibility of the soil, slope steepness and length, land use practices and conservation strategies.
26.1 The manmade causes of soil erosion are ____ 1
a) Deforestation
b) Overgrazing
c) Mining
d) All the above
26.2Gully erosion is common in this region of India. 1
a)Ganga basin
b) Chambal basin
c) Indus basin
d) Narmada basin
26.3 The important factors of soil formation are 1
(a)Time and Parent rock
(b) Relief and Erosion
(c) Parent rock and Denudation
(d) All the above
26.4 Soil erosion is governed by a number of factors 1
(a) Slope steepness and length
(b) Erodibility of the soil
(c) Land use practices
(d) All the above

Answer 1

Answer:

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