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SUPER 30 SSC & Railways - General Science Test 133
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SUPER 30 SSC & Railways - General Science Test 133
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  • Question 1/30
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    The chemical properties of an element depend upon
    Solutions
    • Chemical properties of an element depend on the number and the configuration of their valence electrons.
    • The outermost or valence electrons of an atom are the ones that take part in chemical reactions. 
  • Question 2/30
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    The temperature at which a solid melts to become a liquid at the atmospheric pressure is called its ___________.
    Solutions
    The temperature at which a solid melts to become a liquid at the atmospheric pressure is called its Melting point or in other words, it is aliquefaction point for any solid. In this phenomenon, the solid and liquid forms of a pure substance can exist in equilibrium.
  • Question 3/30
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    Wave number is the number of wavelength that can be accommodated in ___ length
    Solutions
    Wave number is equal to the number of waves in a unit distance typically in centimeters and metres.
    More about Wave number:
    • In free space, the wave number k is related to the frequency f by k = f/c
    • In media other than free space, c must be multiplied by a velocity factor v. The velocity factor for a particular medium is the ratio of the speed of EM propagation in that medium to the speed of EM propagation in free space.
    k = f/(vc)
  • Question 4/30
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    Bronze is an alloy of
    Solutions
    Bronze is an alloy consisting primarily of copper, commonly with about 12% tin and often with the addition of other metals (such as aluminium, manganese, nickel or zinc) and sometimes non-metals or metalloids such as arsenic, phosphorus or silicon.
  • Question 5/30
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    Which one of the following minerals contains mostly silica?
    Solutions
    quartz has a high quantity of silica. 
    But Mica is a family of minerals primarily composed of silicon, oxygen, and aluminum.
  • Question 6/30
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    Which of the following is an example of sublimation?
    I. Dry ice
    II. Camphor
    III. Ice
    Solutions
    The process of conversion from solid to gas is known as sublimation. Dry ice and camphor are the examples of sublimation.
  • Question 7/30
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    Amount of water vapour (gaseous) in a given volume of air (cubic metre) is known as:
    Solutions
    Absolute humidity is the measure of water vapor (moisture) in the air, regardless of temperature. It is expressed as grams of moisture per cubic meter of air.
  • Question 8/30
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    The physical method commonly used to purify sea water is
    Solutions
    Distillation is a commonly used method for purifying liquids and separating mixtures of liquids into their individual components. It is used to purify the sea water.
  • Question 9/30
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    Oxygen has (+) oxidation number only in
    Solutions
    In the compound OF2 oxygen is not the most electronegative element. The fluorine is more electronegative and has an oxidation state of -1. In this case, the oxygen has an oxidation state of +2.
  • Question 10/30
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    Which one of the following is also called Stranger Gas?
    Solutions
    Xenon is called the ‘stranger’ gas. This gas is very un-reactive and heavier than air, that was why named strange (in Greek it means ‘xenon’).
  • Question 11/30
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    What do you understand by turgor?
    Solutions
    • The term turgor refers to the water pressure within a plant's cells.
    • Osmosis helps maintain a plant's cellular turgor, and the membrane of the plant's cells controls the turgor.
    • Water passes through the membrane into the middle of the cell and then back out. It is caused by the osmotic flow of water from an area of low solute concentration outside the cell into the cell vacuole, which has a higher solute concentration.
    • Healthy plant cells are turgid and plants rely on turgidity to maintain rigidity.
  • Question 12/30
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    Adamsia (Sea anemone), Pennatula (Sea-pen) are examples of which Phylum?
    Solutions
    Adamsia (Sea anemone), Pennatula (Sea-pen) are examples of Cnidaria Phylum.They are predominantly marine. Their distinguishing feature is cnidocytes, specialized cells that they use mainly for capturing prey.
  • Question 13/30
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    Which of following is a good source of chromium?
    Solutions
    Broccoli, turkey ham, dried apricots, tuna, pineapple and grape juice are rich source of chromium.
    * Recommended dietary allowance of chromium is 35 µg.
  • Question 14/30
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    The later (second) formed primary xylem elements are called _____________.
    Solutions
    It’s the Metaxylem which is the second formed primary xylem. The primary part, formed before Metaxylem is called as Protoxylem. Compared to the latter, the former has wider vessels and tracheid. Moreover, xylem is one of the two types of transport tissue in vascular plants, which has a basic function of transporting water from roots to other parts of plant.
  • Question 15/30
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    Gall bladder stones are deposits of
    Solutions
    Gall bladder stones are deposits of Cholesterol. In general all stones are supersaturated, pebble-like deposits of bile inside the gallbladder. 
  • Question 16/30
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    Which of the following phenomena supposedly associated with global warming?
    Solutions
    Southern Oscillation associated with global warming. The mode and relative strength of the Southern Oscillation during a given time period is determined using one of several indices that signifies changes in the Walker circulation. Southern Oscillation is an irregularly periodical variation in winds and sea surface temperatures over the tropical eastern Pacific Ocean, affecting much of the tropics and subtropics. The warming phase is known as El Niño and the cooling phase as La Niña.
  • Question 17/30
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    Prawn heart carries
    Solutions
    • Prawn is a common name for small aquatic crustaceans with an exoskeleton and ten legs.
    • The blood circulation in prawn is open type, i.e., blood flows through the body spaces. Such spaces are called haemocoels.
    • The heart contracts to drive the oxygenated blood to the different parts of the body through arter­ies.
  • Question 18/30
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    Which of the following vitamins is necessary for clotting of blood?
    Solutions
    Vitamin K, a fat-soluble vitamin, is necessary for clotting of blood. It plays a key role in helping the blood clot, preventive excessive bleeding.
  • Question 19/30
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    Which one of the following is the smallest endocrine gland in human body?
    Solutions
    Out of the given option, the Pituitary gland (also called Master gland) is the smallest endocrine gland. It is small, pea-sized gland and has two-lobes (anterior and posterior).
  • Question 20/30
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    In which part of desert plants, most of the photosynthesis takes place?
    Solutions
    The desert plants have scale or spine-like leaves to reduce the loss of water by transpiration. These plants have green stems which carry out photosynthesis.
  • Question 21/30
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    In total internal reflection, the light travels from
    Solutions
    According to wave theories, for Total internal reflection to happen: Light must travel from denser medium to rarer medium. Angle of incidence should be greater than critical angle
    As in case of TIR, the image is perfectly clear, it implies that there has been no loss of intensity.
  • Question 22/30
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    Electroscope was invented by
    Solutions

    • An electroscope is a scientific instrument used to detect the presence and magnitude of electric charge on a body.

    •  It was invented by William Gilbert.

  • Question 23/30
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    What is the minimum distance (in metres) required to hear an echo?
    Solutions
    Echo is a reflection of sound. The minimum distance required to hear an echo is 17.2 metres. Time taken for an Echo is proportional to the distance of the reflecting surface from the source and the listener. Examples are the echo produced by the bottom of a well, by a building, or by the walls of an enclosed room.
  • Question 24/30
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    What is the S.I unit of universal gas constant?
    Solutions
    * Gas constant is expressed in units of energy per temperature increment per mole
    * According to ideal gas law, PV=nRT;
    Where P= Absolute pressure, V=Volume of gas, n=Amount of gas, m=Mass contained in V, T= Thermodynamic Temperature, R=Molar weight specific gas constant
    → R=(PV)/(nT)=Joule/(mole*Kelvin)=J/(K.mol)
  • Question 25/30
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    Peta suffix is used to denote what factor of 10?
    Solutions
    Some prefixes are attached to basic unit of physics to denote some multiples of them.
    101 = deca, 1015 = peta, 1012 = tera, 106 = mega
  • Question 26/30
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    The purpose of choke in a fluorescent lamp is

    Solutions
    The choke, or inductor when used in flourescent lamps serves as an impedance, limiting the current through the lamp. So, the purpose of choke in a fluorescent lamp is to decrease the current flow.
  • Question 27/30
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    The characteristic invalid for heat radiation is that it travels:
    Solutions
    • Heat radiation(as opposed to particle radiation) is the transfer of internal energy in the form of electromagnetic waves. 
    • Radiation happens when heat moves as energy waves, called infrared waves, directly from its source to something else.
  • Question 28/30
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    “The length of its day and the tilt of its axis are almost identical to those of the earth”. This is true of
    Solutions
    “The length of its day and the tilt of its axis are almost identical to those of the earth”. This is true of Mars
  • Question 29/30
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    The force acting between two electric charges is related with____.
    Solutions
    Coulomb's law is a law of physics describing the electrostatic interaction between electrically charged particles.
  • Question 30/30
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    Alcohol is used, when there is need to measure the temperature below?
    Solutions
    • Alcohol is used, when there is need to measure the temperature of below (-400) C Temperature. Because it freezes at (-1150) C Temperature.
    • Mercury thermometer can not measure very low temperature, because its freezing point is -400 C Temperature.
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