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Chemistry Test - 6

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Chemistry Test - 6
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Weekly Quiz Competition
  • Question 1
    1 / -0

    The charge on positron is equal to the charge on–

    Solution

    The charge on positron is equal to the charge on proton.

  • Question 2
    1 / -0

    A plant used to treat bone fractures

    Solution

    Cassia occidentalis (Fabaceae) are the plants used for healing of bone fracture. Cicuta maculata (family Apiaceae) decoction of the plant is used to treat bruises, sprains, sore joints, or broken bones. Curcuma domestica (family Zingiberaceae) root powder paste and ghee is applied locally.

  • Question 3
    1 / -0

    Hydrochloric acid is also known as

    Solution

    Muriatic acid is one of the names for hydrochloric acid, a corrosive strong acid. It is also known as spirits of salt or acidum salis. “Muriatic” means “pertaining to brine or salt”. The chemical formula for muriatic acid is HCl.

  • Question 4
    1 / -0

    Carborundum is another name of which of the following?

    Solution

    Silicon carbide (SiC), also known as carborundum is a compound of silicon and carbon with chemical formula SiC.

  • Question 5
    1 / -0

    This chemical equation " " \(2 {Mg}+{O}_{2} \rightarrow 2 {MgO}+\) Heat" belongs to Which of the following type of chemical reaction?

    Solution

    This chemical equation " " \(2 {Mg}+{O}_{2} \rightarrow 2 {MgO}+\) Heat" belongs toCombustion reaction.

    It is a reaction with a combustible material with an oxidizer to give an oxidized product.An oxidizer is a chemical a fuel requires to burn, generally oxygen.

  • Question 6
    1 / -0

    The element required for solar energy conversion is-

    Solution

    Photovoltaics (PV) use silicon solar cells to convert the energy of sunlight into electricity. It operates under photoelectric effect which results in the emission of electrons.

  • Question 7
    1 / -0

    Tritium is an isotope of–

    Solution

    Tritium is a naturally occurring radioactive form of hydrogen that is produced in the atmosphere when cosmic rays collide with air molecules.

  • Question 8
    1 / -0

    Gammaxene, D.D.T. and Bleaching powder are important compounds of :

    Solution

    These are the compounds of chlorine.

  • Question 9
    1 / -0

    When Bleaching Powder is mixed in water which gas is released?

    Solution

    Ca(OCl)2+2H2O→Ca(OH)2+Cl2

  • Question 10
    1 / -0

    What is the mass of \(0.5\) mole of \({N}_{2}\)?

    Solution

    Given:

    Number of moles of \({N}_{2}=.5\) mole

    The molar mass of \({N}_{2} = 14 + 14 = 28~g\)

    The mass of one mole is the molar mass which is \(28 {~g}\) for \({N}_{2}\).

    Mass of \(0.5\) mole\(=\frac{28}2 = 14~g\)

    Therefore, the mass of \({0 . 5}\) moles of \({N}_{{2}}\) is \(14 {~g}\).

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