These MCQs are based on Today’s Targets given here
Q.1) Consider the following statements about Mosses:
1. Mosses are flowerless plant found in humid and shady locations
2. Mosses act as a good bio indicator of pollution as it absorb water and nutrients from their immediate environments
Select the correct answer using the code given below:
a) 1 only
b) 2 only
c) Both 1 and 2
d) Neither 1 nor 2
Ans. C
Explanation:
- Mosses are a common flowerless plant found in all cities especially in damp (humid) or shady locations.
- It generally absorb water and nutrients from their immediate environments, so it can reflect changes to ecosystems.
- So it can be used as potential bioindicators to monitor urban pollution and to measure the impact of atmospheric change.
- As a bioindicator, mosses respond to pollution or drought-stress by changing its shape, density or disappearing.
- This characteristic will allow scientists to calculate atmospheric alterations and air pollution.
- Drought-stress tends to occur in mosses found in areas with high levels of nitrogen pollution, which has negative impact on health and biodiversity
Q.2) Consider the following statements about Irrawaddy dolphins:
1. They has been classified in ‘Endangered’ category in IUCN red list
2. They are listed in Appendix I of CITES
Select the correct answer using the code given below:
a) 1 only
b) 2 only
c) Both 1 and 2
d) Neither 1 nor 2
Ans. B
Explanation:
- The Irrawaddy dolphin is an aquatic mammal
- It is a euryhaline species of oceanic dolphin.
- It is found in discontinuous subpopulations near sea coasts and in estuaries and rivers in parts of the Bay of Bengal and Southeast Asia including the Ganges, the Mekong and in the Irrawaddy River from where it takes its name.
- The species has been classified in ‘vulnerable‘ category in IUCN red list.
- The species is also listed in Appendix I of CITES.
Q.3) Consider the following statements about Chilka Lake:
1. It is the largest brackish water lagoon in India.
2. It is located on Orissa and Andhra Pradesh Border.
Select the correct answer using the code given below:
a) 1 only
b) 2 only
c) Both 1 and 2
d) Neither 1 nor 2
Ans. A
Explanation:
- It is Asia’s largest brackish water lagoon.
- It lies in Odisha state on the eastern coast of India, at the mouth of the Daya River flowing into the Bay of Bengal. So, B is wrong.
- Because of its rich bio-diversity and socio-economic importance, Chilika was designated as a Ramsar site in 1981 to afford better protection.
- It is the largest wintering ground for migratory birds on the Indian sub- continent.
- Rambha sector in the Chilika Lake is the ideal sector for dolphins to play, flock and mate because of the stillness of the water in the bay area.
- Chilika, known for its exquisite natural beauty, attracts many tourists because of its dolphin population.
Q.4) Consider the following statements about UDAN Scheme:
1. It seeks to provide connectivity to un-served and under-served airports of the country through revival of existing air-strips and airports
2. It is being implemented in mission mode by Ministry of Transport
Select the correct answer using the code given below:
a) 1 only
b) 2 only
c) Both 1 and 2
d) Neither 1 nor 2
Ans. A
Explanation:
It is being implemented by Ministry of Civil Aviation.
Read More : http://www.ias4sure.com/wikiias/prelims/udan-regional-connectivity-scheme/
Q.5) Consider the following statements:
1. A current-carrying conductor when placed in a magnetic field experiences a force.
2. The phenomenon of electromagnetic induction is the production of induced current in a coil placed in a region where the magnetic field changes with time
3. Fuse is used for protecting the circuits due to short-circuiting or overloading of the circuits.
Which of the following statements are true?
a) 1 and 2
b) 2 and 3
c) None of them
d) All of them
Ans. D
Explanation: A current-carrying conductor when placed in a magnetic field experiences a force. If the direction of the field and that of the current are mutually perpendicular to each other, then the force acting on the conductor will be perpendicular to both and will be given by Fleming’s left-hand rule.
The phenomenon of electromagnetic induction is the production of induced current in a coil placed in a region where the magnetic field changes with time. The magnetic field may change due to a relative motion between the coil and a magnet placed near to the coil. If the coil is placed near to a current-carrying conductor, the magnetic field may change either due to a change in the current through the conductor or due to the relative motion between the coil and conductor. The direction of the induced current is given by the Fleming’s right-hand rule.
Fuse is the most important safety device, used for protecting the circuits due to short-circuiting or overloading of the circuits.
Source: NCERT Class 10th Science, Chapter 13
Thanks a lot.