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s-Block Elements · Question 20

AIPMT 2015 (Cancelled)MCQEasy📈 Topic in 25% papers+4−1
1

The function of "Sodium pump" is a biological process operating in each and every cell of all animals. Which of the following biologically important ions is also a constituent of this pump?

  1. K+
  2. Fe2+
  3. Ca2+
  4. Mg2+

Answer

(1) K+

Solution

As per NCERT, sodium and potassium ions are found in large proportions in biological fluids; Na+ ions are mainly outside the cells and K+ ions mainly inside the cells.

⇒ The sodium–potassium pump operates across the cell membrane: it pumps out 3 Na+ ions and takes in 2 K+ ions, using ATP.

∴ K+ is the other ion of this pump.

Answer: (1)

Out of syllabusAIPMT 2015 (Cancelled)

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2

Solubility of the alkaline earth metal sulphates in water decreases in the sequence

  1. Sr > Ca > Mg > Ba
  2. Ba > Mg > Sr > Ca
  3. Mg > Ca > Sr > Ba
  4. Ca > Sr > Ba > Mg
Out of syllabusAIPMT 2015 (Cancelled)
3

In Castner-Kellner cell for production of sodium hydroxide

  1. brine is electrolyzed using graphite electrodes
  2. molten sodium chloride is electrolysed
  3. sodium amalgam is formed at mercury cathode
  4. brine is electrolyzed with Pt electrodes
Out of syllabusNEET 2013 (Karnataka)
4

Which one of the alkali metals, forms only, the normal oxide, M2O on heating in air?

  1. Rb
  2. K
  3. Li
  4. Na
Out of syllabusAIPMT 2012 (Prelims)
5

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

  1. Li+ < K+ < Na+ < Rb+
  2. Rb+ < K+ < Na+ < Li+
  3. K+ < Na+ < Rb+ < Li+
  4. Na+ < Li+ < K+ < Rb+
Out of syllabusAIPMT 2012 (Prelims)
6

Which of the following statements is incorrect?

  1. Pure sodium metal dissolves in liquid ammonia to give blue solution.
  2. NaOH reacts with glass to give sodium silicate.
  3. Aluminium reacts with excess NaOH to give Al(OH)3.
  4. NaHCO3 on heating gives Na2CO3.
AIPMT 2011 (Mains)
7

Match List-I with List-II for the compositions of substances and select the correct answer using the codes given below.

  1. (A)-(iii), (B)-(iv), (C)-(i), (D)-(ii)
  2. (A)-(ii), (B)-(iii), (C)-(iv), (D)-(i)
  3. (A)-(i), (B)-(ii), (C)-(iii), (D)-(iv)
  4. (A)-(iv), (B)-(iii), (C)-(ii), (D)-(i)
Out of syllabusAIPMT 2011 (Mains)
8

Which one of the following is present as an active ingredient in bleaching powder for bleaching action?

  1. CaOCl2
  2. Ca(OCl)2
  3. CaO2Cl
  4. CaCl2
Out of syllabusAIPMT 2011 (Prelims)
9

The compound A on heating gives a colourless gas and a residue that is dissolved in water to obtain B. Excess of CO2 is bubbled through aqueous solution of B, C is formed which is recovered in the solid form. Solid C on gentle heating gives back A. The compound is

  1. CaCO3
  2. Na2CO3
  3. K2CO3
  4. CaSO4 2H2O
Out of syllabusAIPMT 2010 (Mains)
10

Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy?

  1. CaSO4
  2. BeSO4
  3. BaSO4
  4. SrSO4
Out of syllabusAIPMT 2010 (Prelims)
11

Property of the alkaline earth metals that increases with their atomic number

  1. solubility of their hydroxides in water
  2. solubility of their sulphates in water
  3. ionization energy
  4. electronegativity
Out of syllabusAIPMT 2010 (Prelims)

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