The isomersim exhibited by following compounds [Co(NH₃)₆][Cr(CN)₆] and [Cr(NH₃)₆(CN)₆] is

• ionisation isomerism

• polymerisation isomersion

• Linkage isomersim

• Cooridination isomerism

For the reaction, 2SO₂ + O₂(excess) → 2SO₃ the order of reaction with respect to O₂ is

• two

• three

• zero

• one

33.

Which graph shows zero activation energy for reaction?

• 

• 

• 

• 

Which of the following is correct for a first order reaction?

• t_1/2 ∝ a°

• t_1/2  ∝ a²

• t_1/2  ∝ a

• t_1/2  ∝ 1/a

Which defect in any crystal lowers its density?

• Schottky

• Interstitial

• F- centre

• Frenkel

The half-life period of a radioactive element is 30 days. After 90 days, which of the following quantity will be left?

• 1/2

• 1/6

• 1/8

• 1/4

What is the number of atoms in the unit cell of body centred cubic crystal?

• 1

• 3

• 4

• 2

In the manufacture of ammonia by Haber's process, N₂ (g) + 3H₂(g) $\rightleftharpoons$2NH₃(g) + 92.3kJ. which of the following conditions is unfavourable?

• reducing the temperature

• Removing ammonia as it is formed

• Increasing the temperature

• Increasing the pressure

What will happen if a cell is placed into 0.4% (mass/volume) NaCl solution?

• There will be no change in cell volume

• Cell will dissolve

• cell will swell

• cell will shrink

It a compound is formed by X, Y and Z atoms and Z is present on the comers, Y is present $\frac{1}{2}$ tetrahedral voids and X atom in $\frac{1}{2}$ octahedral voids, which of the following will be the molecular formula of the compound?

• X₂Y₄Z

• XYZ₄

• XYZ

• X₂ZY