How do ionic bonds affect the properties of ionic compounds? The bonds weakly hold ions together, increasing the melting point.
The bonds strongly hold ions together, reducing the boiling point.
The bonds prevent ions from moving throughout the crystal, so a solid ionic compound is a poor conductor.
The bonds prevent electrons from moving throughout the crystal, so a solid ionic compound is a poor conductor.

Idon't see the pic?

Ithink the answer is d

Reaction involved in present system is :   c12h22o11 + h2o → 2 c6h12o6the reaction system is obeying following rate law:   rate = k[c12h22o11]thus, it is a first order reaction.now, for 1st order reactionrate constant (k) =  given: initial conc. = 3.0 g, final conc. = 2.7 g, t = 2.5 h∴rate constant (k) =  ∴ k = 0.04215 h-1now, for 1st order reaction, half life = 0.693/k = 0.693/0.04215 = 16.4 hthus correct answer is option b