General Science & Ability
Total Marks: 100
1. A shooting star is (CSS 2014)
(a) Sun
(b) A comet
(c) A meteor
(d) An asteroid
2. The atmosphere of moon consists of: (CSS 2013)
(a) 90% Hydrogen, 10% Nitrogen
(b) 80%Nitrogen, 20% Hydrogen
(c) 60% Nitrogen, 40% inert gases
(d) None of these
3. Deficiency of Vitamin B causes (CSS 1994)
(a) Rickets, beriberi
(b) Night, blindness
(c) Scurvy
4. Cheapest source of producing electricity is (CSS 1994)
(a) Coal
(b) Natural gas
(c) Water
(d) None of these
Empty, mocked-up shells of the new coronavirus, COVID-19, may assist explain how nicely the virus stands up to warmth, humidity and different environmental modifications.
The studies, just launched by means of physicists at The University of Utah, is designed to help public fitness officials apprehend how the brand new coronavirus will react because the seasons change. One primary question approximately the virus, which reasons a disease referred to as COVID-19, is whether or not summer time will do something to sluggish the spread.
The Earth is constantly in motion, revolving around the Sun and rotating on its axis. These motions account for many of the phenomenon we see as normal occurrences: night and day, changing of the seasons, and different climates in different regions. With a globe ball properly mounted and rotating on its axis, the movements of the Earth around the Sun may be illustrated accurately.
The Earth spins on its axis from West to East (counter-clockwise). It takes the Earth 23 hours, 56 minutes, and 4.09 seconds to complete one full turn. Day and night are produced by the rotation of the Earth. The speed of rotation at any point upon the equator is at the rate of approximately 1,038 miles per hour, decreasing to zero at the poles.
Our solar system consists of the sun, planets, dwarf planets (or plutoids), moons, an asteroid belt, comets, meteors, and other objects. The sun is the center of our solar system; the planets, over 61 moons, the asteroids, comets, meteoroids and other rocks and gas all orbit the Sun. Our solar system is always in motion. Eight known planets and their moons, along with comets, asteroids, and other space objects orbit the Sun. The Sun is the biggest object in our solar system. It contains more than 99% of the solar system’s mass. Astronomers think the solar system is more than 4.5 billion years old.
Q: Explain the terms Dark Energy and Dark Matter (CSS-2018)
In calculating the total mass-energy of the universe, astrophysicists find that baryonic matter, the type composed of atoms, accounts for only about 4 percent of the total mass-energy of the universe. The remaining 96 percent of mass is about 21 percent dark matter and 75 percent dark energy.
Dark matter has been impossible to investigate directly because it does not interact with electromagnetic radiation –visible light, infrared, etc. It has so far been identified only by its effects, especially its gravitational effects on galaxies and other large-scale entities, and also by its influence on the cosmic background radiation.
In the early universe, dark matter played a dominant role in the formation of the early galaxies. The cold gases in the universe gravitated to scattered dark matter densities. Where sufficient gas accumulated, star clusters and galaxies formed. Astronomers today maintain that each galaxy is enveloped in a halo of dark matter, and the halo applies so much force that the outside edge of a galaxy rotates about as fast as the deep interior. It is the halo of dark matter that prevents a galaxy from flying apart.
Which of the following does not vary predictably with the depth of the aquatic environment? (CSS 2013)
(a) Salinity
(b) Temperature
(c) Penetration by sunlight
(d) None of these
Answer: (a)
The ozone layer protects the earth from rays sent by the sun: (CSS 2011)
(a) Ultraviolet rays
(b) Infrared rays
(c) Gamma rays
(d) Radioactive rays
(e) None of these
Answer: (a)
The ozone layer is present in atmosphere above earth. The stratum (layer) of atmosphere in which ozone layer lies is called as: (CSS 2011)
(a) Exosphere
(b) Mesosphere
(c) Stratosphere
(d) Ionosphere
(e) Troposphere
Answer: (c)
The Milky Way, or simply the Galaxy, is the galaxy in which the Solar System is located. It is a barred spiral galaxy that is part of the Local Group of galaxies. It is one of billions of galaxies in the observable universe The Milky Way contains at least 100 billion stars and may have up to 400 billion stars. All the objects in the Milky Way Galaxy orbit their common center of mass, called the Galactic Center
How is biofuel made?
(a) By fermenting the sugar components of starch crops
(b) By reacting vegetable oil or animal fat with an alcohol
(c) By treating plant oil or animal fat with hydrogen
(d) All of the above
Answer: (d)
Ethanol is biofuel and are known as
(a) carbon neutral
(b) hydrogen neutral
(c) oxygen neutral
(d) All of them
Answer: (a)
Propan-2-ol will get oxidized to give
(a) aldehyde
(b) ketone
(c) alcohol
(d) carbonyl
Answer: (b)
2 methyl-2 propan-2-ol is an example of
(a) primary alcohol
(b) secondary alcohol
(c) tertiary alcohol
(d) quaternary alcohol
Answer: (c)
A galaxy is a large scale aggregate of stars, plus some gas, dust, and possibly. Solar systems, which are held together by gravity.
Early astronomers would look into the Universe with Their telescopes and notice “milky” areas that they could not be defined as one star. Sir William Herschel, in the late 1700’s, counted stars and recorded them, developed a notion of the Galaxy. The Galaxy referred to our own Milky Way with its billions of stars, with our Sun and planets being a component. Other galaxies were found throughout the Universe. These islands of stars had different shapes and sizes. The Andromeda Galaxy is spiral, and is larger than our Milky Way Galaxy.
Q: Briefly describe what is big bang theory. (CSS-2011)
Once it was understood that the Universe had a beginning, scientists began to ask “how did it come into existence, and what existed before it?”
Most scientists now believe that the answer to the first part of the question is that the Universe sprang into existence from a singularity — a term physicists use to describe regions of space that defy the laws of physics. We know very little about singularities, but we believe that others probably exist in the cores of black holes.