11.

The alkene that exhibits geometrical isomerism is

• propene

• 2-methyl propene

• 2-butene

• 2-butene

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

• CO₂< SiO₂< SnO₂< PbO₂: increasing oxidising power

• HF< HCl < HBr < HI : increasing acid strength

• NH₃< PH₃< AsH₃< SbH₃: increasing basic strength

• NH₃< PH₃< AsH₃< SbH₃: increasing basic strength

Which of the following statements is incorrect regarding physissorptions?

• It occurs because of vander Waal’s forces.

• More easily liquefiable gases are adsorbed readily.

• Under high pressure, it results into multimolecular layer on the adsorbent surface.

• Under high pressure, it results into multimolecular layer on the adsorbent surface.

Two liquids X and Y form an ideal solution. At 300 K, the vapour pressure of the solution containing 1 mol of X and 3 mol of Y is 550mm Hg. At the same temperature, if 1 mol of Y is further added to this solution, the vapour pressure of the solution increases by 10 mm Hg. Vapour pressure (in mmHg) of X and Y in their pure states will be respectively

• 200 and 300

• 300 and 400

• 400 and 600

• 400 and 600

The half life period of a first order chemical reaction is 6.93 minutes. The time required for the completion of 99% of the chemical reaction will be (log 2=0.301) 

• 230.3 minutes

• 23.03 minutes

• 46.06 minutes

• 46.06 minutes

Given:  The value of standard electrode potential for the change  will be

• -0.072

• 0.385 V

• 0.770 V

• 0.770 V

On the basis of the following thermochemical data: (∆f G° H(aq)+=0)
H₂O(l) → H⁺(aq) + OH^–(aq); ∆H =57.32kJ
H₂(g) + 1/2O₂(g) → H₂O(l); ∆H = –286.20 kJ
The value of enthalpy of formation of OH^–ion at 25°C is

•  –22.88 kJ

• –228.88 kJ

• +228.88 kJ

• +228.88 kJ

Copper crystallizes in fcc with a unit cell length of 361 pm. What is the radius of copper atom?

• 108 pm

• 127 pm

• 157 pm

• 157 pm

Which of the following has an optical isomer ?

• [CO(NH₃)₃Cl]⁺

• [CO(en)(NH₃)₂]²⁺

• [CO(H₂O)(en)]³⁺

• [CO(H₂O)(en)]³⁺

Solid Ba (NO₃)₂ is gradually dissolved in a 1.0x 10⁻⁴ × Na₂CO₃ solution. At what concentration of Ba²⁺ will a precipitate begin to form?(K_sp for BaCO₃ = 5.1 ×10⁻⁹  )

• 4.1 x 10^-5 M

• 5.1 x 10^-5 M

• 8.1 x 10^-8 M

• 8.1 x 10^-8 M