Which of the following statement is incorrect?

• The rate of law for any reaction cannot be determined experimentally

• Complex reactions have fractional order

• Biomolecular reactions involved simultaneous collision between two species

• Molecularity is only applicable for elementary reaction

Which of the following elements forms pπ- pπ bond with itself?

• P

• Se

• N

• Te

Which of the following statement is in accordance with the Arrhenius equations?

• Rate of reaction does not change with increase in activation energy

• Rate constant decreases exponentially with increase in temperature

• Rate of a reaction increases with increases in temperature and decreases in activation energy

• none of these

The magnetic nature of elements depends on the presence of unpaired electrons. Identify the configuration of transition elements which shows highest magnetic moment?

• 3d⁷

• 3d⁸

• 3d⁵

• 3d²

25.

The process which is responsible for the formation of delta at a place where rivers meets the sea is

• Coagulation

• Colloid formation

• peptisation

• emulsification

Extraction of chlorine from brine solution based on

• Oxidation

• acidification

• chlorination

• reduction

Which of the following is not a favourable condition for physical adsorption?

• High temperature

• High pressure

• Higher crtical temperature of adsorbate

• low temperature

The correct statement regarding defect in solids is

• Frenkel defect is usually favoured by a very small difference in the sizes of cations and anions.

• Frenkel defect is a dislocation defect

• Trapping of proton in the lattice leads to the formation of F-centres.

• Schottky defect has no effect on the physical properties of solids.

According to crystal field theory, the M-L bond in a complex is

• partially covalent

• purely ionic

• purely covalent

• purely coordinate

Which of the following crystal has unit cell such that a≠b≠c and α≠β≠γ≠ 90°?

• NaNO₃

• K₂SO₄

• KNO₃

• K₂Cr₂O₇