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NEET CHEMISTRYCoordination CompoundsEasy

Question

Which of the following statements is false?

A

Ca2+^{2+} ions are important in blood clotting

B

Ca2+^{2+} ions are not important in maintaining the regular beating of the heart

C

Mg2+^{2+} ions are important in the green parts of plants

D

Mg2+^{2+} ions form a complex with ATP

Step-by-Step Solution

  1. Blood Clotting: Calcium ions (Ca2+Ca^{2+}) play a very important role in the coagulation (clotting) of blood . Thus, the first statement is true.
  2. Heart Beat: Calcium ions are essential for muscle contraction . The heart is a muscular organ, and its rhythmic contraction (beating) relies on the regulation of Ca2+Ca^{2+} levels. Low levels of Ca2+Ca^{2+} can lead to tetany (wild contractions) . Therefore, the statement that Ca2+Ca^{2+} ions are not important for the regular beating of the heart is false.
  3. Photosynthesis: Chlorophyll, the green pigment responsible for photosynthesis in plants, is a coordination compound of magnesium (Mg2+Mg^{2+}) . Thus, the third statement is true.
  4. ATP Complex: In biological systems, Magnesium ions (Mg2+Mg^{2+}) are required as cofactors for enzymes that utilise ATP in phosphate transfer. Mg2+Mg^{2+} forms a complex with ATP (Adenosine Triphosphate), making it biologically active . Thus, the fourth statement is true.

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Coordination Compounds. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYCoordination Compoundsfollowingstatements

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The complex, $[\text{Pt}(\text{Py})(\text{NH}_3)\text{BrCl}]$ will have how many geometrical isomers?

A.4
B.0
C.2
D.3
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Among the given complexes, the complex having the highest paramagnetic behaviour is: (At. No. Ti = 22, Cr = 24, Co = 27, Zn = 30)

A.$[Zn(NH_3)_6]^{2+}$
B.$[Ti(NH_3)_6]^{3+}$
C.$[Cr(NH_3)_6]^{3+}$
D.$[Co(NH_3)_6]^{3+}$
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Mg is present in:

A.Chlorophyll
B.Haemoglobin
C.Vitamin-B12
D.Vitamin-B
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The complexes $[\text{Co}(\text{NH}_3)_6][\text{Cr}(\text{CN})_6]$ and $[\text{Cr}(\text{NH}_3)_6][\text{Co}(\text{CN})_6]$ are examples of:

A.Ionisation isomerism
B.Coordination isomerism
C.Geometrical isomerism
D.Linkage isomerism
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The coordination compound that gives the maximum number of isomers is:

A.$[Co(NH_3)_4Cl_2]$
B.$[Ni(en)(NH_3)_4]^{2+}$
C.$[Ni(C_2O_4)(en)_2]$
D.$[Cr(SCN)_2(NH_3)_4]^+$
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$[Cu(NH_3)_4]^{2+}$ reacts with $HNO_3$ in excess of water and gives:

A.$Cu(OH)_2$
B.$Cu(NO_3)_2$
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D.None of the above
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CFSE (in the octahedral field) will be maximum in: (Atomic number Co = 27)

A.[Co(H₂O)₆]³⁺
B.[Co(NH₃)₆]³⁺
C.[Co(CN)₆]³⁻
D.[Co(C₂O₄)₃]³⁻
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The IUPAC name of the following complex is: $[Ag(H_2O)_2][Ag(CN)_2]$

A.Diaquasilver(I) dicyanidoargentate(I)
B.Dicyanidosilver(II) diaquaargentate(II)
C.Diaquasilver(II) dicyanidoargentate(II)
D.Dicyanidosilver(I) diaquaargentate(I)
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