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Railway Rapid Test 63
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Railway Rapid Test 63

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  • Question 1/10
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    During respiration, the gases enter into the blood and leave the same by the process of
    Solutions

    • The exchange of gases between the alveoli in your lungs and again at the cellular level is diffusion, without diffusion we wouldn't be alive.

    • Diffusion is basically a process of  the net movement of molecules from a region of high concentration  to a region of low concentration  as a result of random motion of the molecules or atoms.

  • Question 2/10
    1 / -0
    Which element does not contain any neutrons in its nucleus?
    Solutions

    ● The only element that does not have any neutrons in the nucleus is elemental hydrogen.

    ● Hydrogen is the chemical element with the symbol H and atomic number 1.

    ● It is the lightest element in the periodic table.

  • Question 3/10
    1 / -0
    Which algae is known as space algae?
    Solutions

    * Chlorella is known as space algae.

    * It is good food source for human consumption in space as it contains high levels of iron, vitamins and amino acids.

    * Also it grow easily in the presence of sunlight, carbon dioxide, small amount of minerals and water.

  • Question 4/10
    1 / -0
    Who invented Polythene?
    Solutions
    • The discovery of polythene is attributed to two scientists, Eric Fawcett and Reginald Gibson who first produced it by accident in 1933.
    • The first patents for polythene were registered in 1936 by Imperial Chemical Industries.
    • Polyethylene is the largest volume polymer produced globally, with over 90 million metric tons per year.
  • Question 5/10
    1 / -0
    What is atomic number of Nitrogen?
    Solutions
    ⇒ Nitrogen is a chemical element with symbol N and atomic number 7.
    ⇒ It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772.
    ⇒ Nitrogen is the lightest member of group 15 of the periodic table, often called the pnictogens.
    ⇒ Many industrially important compounds, such as ammonia, nitric acid, organic nitrates (propellants and explosives), and cyanides, contain nitrogen.
  • Question 6/10
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    What is atomic number of Sodium?
    Solutions
    ⇒ Sodium is a chemical element with symbol Na and atomic number 11.
    ⇒ It is a soft, silvery-white and a highly reactive metal.
    ⇒ Its only stable isotope is 23Na.
    ⇒ Sodium is the sixth most abundant element in the Earth's crust.
  • Question 7/10
    1 / -0
    Ordinary table salt is Sodium Chloride. What is Baking Soda?
    Solutions
    Sodium bicarbonate with chemical formula NaHCO₃, commonly known as baking soda, is a chemical compound.
    * It is a salt composed of a sodium cation and a bicarbonate anion. Sodium bicarbonate is a white solid that is crystalline, but often appears as a fine powder.
  • Question 8/10
    1 / -0
    The scientist who first used a glass prism to obtain the spectrum of sunlight was ?
    Solutions
    Isaac Newton was the first scientist who used a glass prism to obtain the spectrum of sunlight.
    * He was also the first one to use the word spectrum in the sense that prism could dissemble and reassemble white ligh .
  • Question 9/10
    1 / -0
    Which answer figure will complete the pattern in the question figure?
    Question figure:
    Solutions

    Mirror image of the figure suits option C.
    Hence, the correct option is C.
  • Question 10/10
    1 / -0
    What is greatest four digit number which is completely divisible by 9, 12, 24 and 32?
    Solutions
    L.C.M of (9, 12, 24 and 32) = 32 x 9 = 288

    Required highest four-digit number = highest four-digit number  - {remainder left when 9999 divided by 288}
    So, 9999 - 207 = 9792 
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