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NEET Chemistry Solved Question Paper 2015

Multiple Choice Questions

Which of the following species contains an equal number of σ and Π bond?

HCO₃^-
XeO₄
(CN)₂
(CN)₂

2307 Views

The species Ar, K⁺ and Ca²⁺ contain the same number of electrons. In which order do their radii increase?

Ar < K⁺< Ca²⁺
Ca²⁺ < Ar < K⁺
Ca²⁺ < K⁺ < Ar
Ca²⁺ < K⁺ < Ar

1221 Views

3.
Solubility of the alkaline earth's metal sulphates in water decreases in the sequence

Mg>Ca>Sr>Ba

Ca>Sr>Ba>Mg>

Sr>Ca>Mg>Ba

Sr>Ca>Mg>Ba

Mg>Ca>Sr>Ba

The solubility of the sulphates. The sulphates becomes less soluble as you fo down the group i.e

Mg> Ca>Sr> Ba

The magnitude of the lattice energy remains almost constant as the size of the sulphate ion is so big that small increase in the size of the cation from Be to Ba does not make any difference. However, the hydration energy decreases from Be²⁺ to Ba²⁺ appreciably as the size of the cation increases down the group. The significantly high solubility of MgSO₄ is due to high enthalpy of solvation on the smaller Mg²⁺ ions.

734 Views

Which of the following pairs of ions are isoelectronic and isostructural?

$CO subscript 3 superscript 2 minus end superscript comma space SO subscript 3 superscript 2 minus end superscript$
$ClO subscript 3 superscript minus comma space CO subscript 3 superscript 2 minus end superscript$
$SO subscript 3 superscript 2 minus end superscript comma NO subscript 3 superscript minus$
$SO subscript 3 superscript 2 minus end superscript comma NO subscript 3 superscript minus$

2058 Views

Magnetic moment 2.84 BM is given by (At. no. Ni= 28, Ti= 22, Cr=24, Co = 27)

Ni²⁺
Ti³⁺
Cr³⁺
Cr³⁺

2504 Views

If the value of an equilibrium constant ofr particular reaction is 1.6 x10¹² then at equilibrium the system will contains

all reactants
mostly reactants
mostly products
mostly products

1313 Views

The number of d- electrons in Fe²⁺ (Z = 26) is not equal to the number of electrons in which one of the following?

S- electronic in Mg (Z=12)
p-electrons in Cl( Z=17)
d- electrons in Fe (Z=26)
d- electrons in Fe (Z=26)

984 Views

The angular momentum of electrons in d orbital is equal to

$square root of 6 space h$
$square root of 2 straight h$
$2 square root of 3 straight h$
$2 square root of 3 straight h$

827 Views

The K_sp of Ag₂CrO₄, AgCl, AgBr and AgI are respectively, 1.1 x 10^-12, 1.8 x 10^-11, 8.3 x 10^-17. Which one of the following salts will precipitate last if AgNO₃ solution is added to the solution containing equal moles of NaCl, NaBr, NaI and Na₂CrO₄?