NEET Chemistry - New - s-Block Elements (Alkali and Alkaline Earth Metals)

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Question - 1

Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is 1s2 2s2 2p3, the simplest formula for this compound is:

  • A Mg2X
  • B MgX2
  • C Mg2X3
  • D Mg3X2

Question - 2

Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric filed?

  • A Na
  • B K
  • C Rb
  • D Li

Question - 3

The ease of adsorption of the hydrated alkali metal ions on an ion exchange resins follows the order:

  • A Li+ < K+ < Na+ < Rb+
  • B Rb+ < K+ < Na+ < Li+
  • C K+ < Na+ < Rb+ < Li+
  • D Na+ < u+ < K+ < Rb+

Question - 4

In the case of alkali metals, the covalent character decreases in the order:

  • A MF > MCI > MBr > MI
  • B MF > MCl > MI > MBr
  • C MI > MBr > MCI > MF
  • D MCl > MI > MBr > MF

Question - 5

The sequence of ionic mobility in aqueous solution is:

  • A K+ > Na+ > Rb+ > Cs+
  • B Cs+ > Rb+ > K+ > Na+
  • C Rb+ > K+ > Cs+ > Na+
  • D Na+ > K+ > Rb+ > Cs+

Question - 6

The correct order of the mobility of the alkali metal ions in aqueous solution is:

  • A Li+ > Na+ > K+ > Rb+
  • B Na+ > K+ > Rb+ > u+
  • C K+ > Rb+ > Na+ > Li+
  • D Rb+ > K+ > Na+ > u+

Question - 7

When a substance (A) reacts with water it produces a combustible gas (B) and a solution of substance (C) in water. When another substance (D) reacts with this solution of (C), it also produces the same gas (B) on warming but (D) can also produce gas (B) on reaction with dilute sulphuric acid at room temperature. (A) imparts a deep golden yellow colour to a smokeless flame of Bunsen burner. Then, A, B, C and D, respectively are:

  • A Na, H2, NaOH, Zn
  • B K, H2, KOH, Al
  • C Ca, H2, Ca(OH)2, Sn
  • D CaC2, C2H2, Ca(OH)2, Fe

Question - 8

An aqueous solution of sodium carbonate absorbs NO and NO2 to give:

  • A CO2 + NaNO3
  • B CO2 + NaNO2
  • C NaNO2 + CO
  • D NaNO3 + CO

Question - 9

Which of the following atoms will have the smallest size?

  • A Mg
  • B Na
  • C Be
  • D Li

Question - 10

Which one of the following properties of alkali metals increases in magnitude as the atomic number rises?

  • A Ionic radius
  • B Melting point
  • C Electronegativity
  • D First ionization energy