Test: Modern Periodic table and Nomenclature of Elements (May 9) - JEE MCQ

The correct answer is 1 only.

Noble metals

• These metals have high heat resistance, high corrosion resistance, high melting points, and unique catalytic properties.
• They are usually found in nature in their pure form. (Hence, Statement 1 is correct)
• Gold (Ag), Silver (Ag), Platinum (Pt) and Platinum metals are Noble metals. (Hence, statement 2 is incorrect)
• Here, Pt, osmium (Os), iridium (Ir), ruthenium (Ru), rhodium (Rh), and palladium (Pd), are collectively called platinum metals. 
• Because they are so nonreactive, they don't corrode easily. This makes them ideal for jewelry and coins.

The correct answer is Sulphuric acid.

• Sulfuric acid is the chemical name of ‘oil of vitriol’.
• Sulfuric acid is a dense, colourless, oily, corrosive liquid.
• It is one of the most commercially important of all chemicals. 
• It is prepared industrially by the reaction of water with sulfur trioxide.
• Vitriol is any of certain hydrated sulfates or sulfuric acid.
• Uses of Sulphuric acid (H2SO4):
  • In lead storage battery.
  • In the manufacturing of HCl.
  • In the manufacturing of Alum.
  • In the manufacturing of fertilisers,
    drugs, detergents and explosives.

For IUPAC nomenclature of elements with atomic number greater than 100, the abbreviation used for digit zero is n and name is nil.

• Elements in the same group have the same number of valence electrons in their outermost shell, hence, have similar properties.
• Elements in the same period don't have same number of valence electrons, hence, have different properties. But, elements in the same period have same number of shells. 

Transition elements belong to d block and the first transition elements is scandium(whose atomic no. is 21)

The 4 orbitals filled in second period are one 2s (with 2 electrons) and three 2p (with 6 electrons).

Principle quantum no is defined as the no of shells an element possesses. Since every element in the 2nd period has 2 shells, therefore, principle quantum no for 2nd period is 2.

1st period contains only 2 elements hydrogen and helium having atomic no. 1 and 2 respectively.

The electronic configuration of hydrogen is 1s¹ while that of helium is 1s². Both contain only s subshell. S subshell that only contains 1 orbital i.e. z.

Thus, 1st period has 1 orbital.

The Latin word commonly used for the digit 9 is “enn”. It is abbreviated as “e”.