11.

The order of covalent character of KF, KI, KCl is

• KCl < KF < KI

• KI < KCl < KF

• KF < KI < KCl

• KF < KCl < Kl

Which one of the following has highest boiling point?

• H₃CCH₂CH₂CH₂Cl

• (H₃C)₂CHCH₂Cl

• (H₃C)₃CCl

• H₃CCH₂CHClCH₃

The product Z of the following reaction is H₃CC≡CH $\stackrel{2\mathrm{HBr}}{\to }$ Z.

• H₃CCH₂CHBr₂

• H₃CCBr₂CH₃

• H₃CCHBrCH₂Br

• BrCH₂CH₂CH₂Br

Identify X and Y in the following reaction sequence

$\mathrm{X} \stackrel{\mathrm{Zn}}{\to } \mathrm{Y} \underset{\mathrm{Zn}-{\mathrm{H}}_2\mathrm{O}}{\overset{{\mathrm{O}}_3}{\to }} ({\mathrm{CH}}_3{)}_2\mathrm{CO} + {\mathrm{CH}}_2\mathrm{O}$

•  

  X	Y
  (CH3)2CHBrCH3	CH3CH=CHCH3

• X	Y
  (CH3)2CHCH2Br	CH3CH=CHCH3

• X	Y
  (CH3)2CBrCH2Br	(CH3)2C=CH2

• X	Y
  (CH3)2CHCHBr2	(CH3)2C=CH2

Which one of the following will not give flame test?

• Ca

• Ba

• Sr

• Be

Which one of the following forms a basic oxide?

• B

• Tl

• Al

• Ga

The gas produced by the passage of air over hot coke is

• carbon monoxide

• carbon dioxide

• producer gas

• water gas

In environmental chemistry, the medium which is affected by a pollutant is called as the.......

• sink

• slag

• solvent

• receptor

Assertion (A) : Atoms with completely filled and half-filled sub-shells are stable.

Reason (R): Completely filled and half-filled sub-shells have symmetrical distribution of electrons and have maximum exchange energy.

The correct answer is

• (A) and (R) are correct, (R) is the correct explanation of (A)

• (A) and (R) are correct, (R) is not the correct explanation of (A)

• (A) is correct, but (R)is not correct

• (A) is not correct, but (R) is correct

Which one of the following does not exhibit geometrical isomerism?

• Octahedral complex with formula [MX₂L₄]

• Square planar complex with formula [MX₂L₂]

• Tetrahedral complex with formula [MAB XL]

• Octahedral complex with formula [MX₂(L -L)₂]