[Solutions]
Q.1 Rosetta space probe is built by:
a) ISRO
b) NASA
c) European Space Agency
d) Roscosmos
Ans-[C]
Explanation-Rosetta is a space probe built by the European Space Agency launched on 2 March 2004.
Q.2 India’s first dedicated multi-wavelength space observatory is known as:
a) SARAL
b) Astrosat
c) RISAT
d) MoM
Ans-[B]
Explanation-ASTROSAT is India’s first dedicated multi wavelength space observatory. This scientific satellite mission endeavours for a more detailed understanding of our universe. One of the unique features of ASTROSAT mission is that it enables the simultaneous multi-wavelength observations of various astronomical objects with a single satellite.
ASTROSAT will observe universe in the optical, Ultraviolet, low and high energy X-ray regions of the electromagnetic spectrum, whereas most other scientific satellites are capable of observing a narrow range of wavelength band. Multi-wavelength observations of ASTROSAT can be further extended with co-ordinated observations using other spacecraft and ground based observations. All major astronomy Institutions and some Universities in India will participate in these observations.
Q.3 LIGO, which was recently in news is used to study:
a) Solar waves
b) Dark matter
c) Gravitational waves
d) Wormholes
Ans-[C]
Explanation-The Laser Interferometer Gravitational-Wave Observatory (LIGO) is designed to open the field of gravitational-wave astrophysics through the direct detection of gravitational waves predicted by Einstein’s General Theory of Relativity. LIGO’s multi-kilometer-scale gravitational wave detectors use laser interferometry to measure the minute ripples in space-time caused by passing gravitational waves from cataclysmic cosmic sources such as the mergers of pairs of neutron stars or black holes, or by supernovae. LIGO consists of two widely separated interferometers within the United States—one in Hanford, Washington and the other in Livingston, Louisiana—operated in unison to detect gravitational waves.
LIGO is a national facility for gravitational-wave research, providing opportunities for the broader scientific community to participate in detector development, observation, and data analysis. The capabilities of the LIGO detectors were greatly improved with the completion of the Advanced LIGO project in late 2014. The Advanced LIGO detectors will increase the sensitivity and observational range of LIGO by a factor of 10 over its predecessor, bringing 1000 times more galaxies into LIGO’s observational range.
Q.4 Meldonium is used to treat:
a) Malaria
b) Tuberculosis
c) Heart Disease
d) Cerebral Palsy
Ans-[C]
Explanation- Meldonium is used to treat ischaemia. Ischemia is the medical term for what happens when your heart muscle doesn’t get enough oxygen. Ischemia usually happens because of a shortage of blood and oxygen to the heart muscle. It is usually caused by a narrowing or blockage of one or more of the coronary arteries (which supply blood to the heart muscle)
Q.5 Which of the following plants is used to extract blue dye?
a) Trifolium
b) Indigofera
c) Lupin
d) Kessia
Ans-[B]
Explanation This is NCERT based question. Several species, especially Indigofera tinctoria and Indigofera suffruticosa, are used to produce the dye indigo.
Q.6 Kelp is a type of:
a) Sea Grass
b) Sea Weed
c) Coral
d) None of these
Ans-[B]
Explanation- Kelps are large seaweeds belonging to brown algae.It is rich in iodine content.
Q.7 Recently, the which substance has been banned by Govt. of India which was used as an additive in breads and found to cause cancer?
a) Pottasium Flouride
b) Potassium Bromate
c) Calcium Silicate
d) None of these
Ans-[B]
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