1

NEET 2021

MCQ (Single Correct Answer)
The structures of beryllium chloride in solid state and vapour phase, are :
A
Chain in both
B
Chain and dimer, respectively
C
Linear in both
D
Dimer and Linear, respectively

Explanation

Beryllium chloride has a chain structure in the solid state as shown below


In vapour phase Beryllium chloride tends to form a chloro-bridged dimer.

2

NEET 2021

MCQ (Single Correct Answer)
Among the following alkaline earth metal halides, one which is covalent and soluble in organic solvents is :
A
Beryllium chloride
B
Calcium chloride
C
Strontium chloride
D
Magnesium chloride

Explanation

$$\bullet$$ Except for beryllium chloride all other chloride of alkaline earth metals are ionic in nature.

$$\bullet$$ Due to small size of Be, Beryllium chloride is essentially covalent and soluble in organic solvents.
3

NEET 2020 Phase 1

MCQ (Single Correct Answer)
HCl was passed through A solution of CaCl2, MgCl2 and NaCl. Which of the following compound(s) crystallize(s)?
A
Only NaCl
B
Only MgCl2
C
NaCl, MgCl2 and CaCl2
D
Both MgCl2 and CaCl2

Explanation

Since CaCl2 and MgCl2 are more soluble than NaCl, on passing HCl(g) through A solution containing CaCl2, MgCl2 and NaCl, then NaCl crystallizes out (common ion effect).
4

NEET 2020 Phase 1

MCQ (Single Correct Answer)
The following metal ion activities many enzymes, participates in the oxidation of glucose to produce ATP and with Na, is responsible for the transmission of nerve signals.
A
Copper
B
Calcium
C
Potassium
D
Iron

Explanation

Potassium (K) activities many enzymes participate in the oxidation of glucose to produce ATP and helps in the transmission of nerve signal along with Na.

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