AIPMT 2012 Mains | NEET Year Wise Previous Years Questions

AIPMT 2012 Mains

MCQ (More than One Correct Answer)

Activation energy (E_$$a$$) and rate constants (k₁ and k₂) of a chemical reaction at two different temperatures (T₁ and T₂) are related by

$$\ln {{{k_2}} \over {{k_1}}} = - {{{E_a}} \over R}\left( {{1 \over {{T_1}}} - {1 \over {{T_2}}}} \right)$$

$$\ln {{{k_2}} \over {{k_1}}} = - {{{E_a}} \over R}\left( {{1 \over {{T_2}}} - {1 \over {{T_1}}}} \right)$$

$$\ln {{{k_2}} \over {{k_1}}} = - {{{E_a}} \over R}\left( {{1 \over {{T_2}}} + {1 \over {{T_1}}}} \right)$$

$$\ln {{{k_2}} \over {{k_1}}} = {{{E_a}} \over R}\left( {{1 \over {{T_1}}} - {1 \over {{T_2}}}} \right)$$

AIPMT 2012 Mains

MCQ (Single Correct Answer)

In which of the following arrangements the given sequence is not strictly according to the property indicated against it?

HF < HCl < HBr < HI : increasing acidic strength

H₂O < H₂S < H₂Se < H₂Te : increasing pK_a values

NH₃ < PH₃ < AsH₃ < SbH₃ : increasing acidic character

CO₂ < SiO₂ < SnO₂ < PbO₂ : increasing oxidising power

AIPMT 2012 Mains

MCQ (Single Correct Answer)

Which one of the following does not correctly represent the correct order of the property indicated against it?

Ti < V < Cr < Mn; increasing number of oxidation states

Ti³⁺ < V³⁺ < Cr³⁺ < Mn³⁺ : increasing magnetic moment

Ti < V < Cr < Mn : increasing melting points

Ti < V < Mn < Cr : increasing 2^nd ionization enthalpy

AIPMT 2012 Mains

MCQ (Single Correct Answer)

Which of the following exhibits only + 3 oxidation state?