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s-Block Elements · Question 6

NEET (UG) 2021MCQEasy📈 Topic in 12% papers+4−1
1

Among the following alkaline earth metal halides, one which is covalent and soluble in organic solvents is :

  1. Beryllium chloride
  2. Calcium chloride
  3. Strontium chloride
  4. Magnesium chloride

Answer

(1) Beryllium chloride

Solution

Be2+ is the smallest ion of Group 2 with a very high charge density (polarising power).

It strongly polarises the chloride ion, so the Be–Cl bond is largely covalent.

As per NCERT, except for beryllium halides, all other halides of alkaline earth metals are ionic in nature; beryllium halides are essentially covalent and soluble in organic solvents.

Answer: (1)

Out of syllabusNEET (UG) 2021

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2

The structures of beryllium chloride in solid state and vapour phase, are :

  1. Chain in both
  2. Chain and dimer, respectively
  3. Linear in both
  4. Dimer and Linear, respectively
Out of syllabusNEET (UG) 2021
3

The following metal ion activates many enzymes, participates in the oxidation of glucose to produce ATP and with Na+, is responsible for the transmission of nerve signals.

  1. Copper
  2. Calcium
  3. Potassium
  4. Iron
Out of syllabusNEET (UG) 2020
4

HCl was passed through a solution of CaCl2, MgCl2 and NaCl. Which of the following compound(s) crystallize(s)?

  1. Only NaCl
  2. Only MgCl2
  3. NaCl, MgCl2 and CaCl2
  4. Both MgCl2 and CaCl2
Out of syllabusNEET (UG) 2020
5

Which of the following is an amphoteric hydroxide?

  1. Mg(OH)2
  2. Be(OH)2
  3. Sr(OH)2
  4. Ca(OH)2
Out of syllabusNEET (UG) 2019
6

Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is

  1. Ca
  2. Sr
  3. Be
  4. Mg
Out of syllabusNEET (UG) 2019
7

Which of the following oxides is most acidic in nature?

  1. MgO
  2. BeO
  3. BaO
  4. CaO
NEET 2018
8

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

  1. Mg2X3
  2. MgX2
  3. Mg2X
  4. Mg3X2
Out of syllabusNEET 2018
9

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

  1. K+
  2. Rb+
  3. Li+
  4. Na+
Out of syllabusNEET 2017
10

Which of the following statements is false?

  1. Ca2+ ions are not important in maintaining the regular beating of the heart.
  2. Mg2+ ions are important in the green parts of the plants.
  3. Mg2+ ions form a complex with ATP.
  4. Ca2+ ions are important in blood clotting.
Out of syllabusNEET 2016 (Phase 1)
11

The product obtained as a result of a reaction of nitrogen with CaC2 is

  1. CaCN2
  2. Ca2CN
  3. Ca(CN)2
  4. CaCN
Out of syllabusNEET 2016 (Phase 1)

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