Question

Which of the following is not true about the ionic solids? (A) Bigger ions form the close packed structure. (B) Smaller ions occupy either the tetrahedral or the octahedral voids depending upon their size. (C) Occupation of all the voids is not necessary. (D) The fraction of octahedral or tetrahedral voids occupied depends upon the radii of the ions occupying the voids.

Chlorine water on standing loses its yellow colour due to the formation of a) Cl and HOCl. b) HCl and HOCl. c) HOCl and $HOCl_2$. d) HCl and $HOCl_2$.

Which of the following is a network solid? (A) $\mathrm{SO}_{2}$ (solid) (B) $\mathrm{I}_{2}$ (C) Diamond (D) $\mathrm{H}_{2}\mathrm{O}$(ice)

A compound X with the molecular formula $C_2$$H_8$O can be oxidised to another compound Y whose molecular formulae is $C_3$$H_6$$O_2$. The compound X may be (a) $CH_3$$CH_2$$OCH_3$. (b) $CH_3$$CH_2$CHO. (c) $CH_3$$CH_2$$CH_2$OH. (d) $CH_3$$CHOHCH_3$.

Which of the following conditions favours the existence of a substance in the solid state? (A) High temperature (B) Low temperature (C) High thermal energy (D) Weak cohesive forces

The decreasing order of boiling point of the following alcohols is (a) 3-methylbuan-2-ol > 2-methylbutan-2-ol > pentan-1-ol. (b) Pentan-1-ol > 3-methylbutan-2-ol > 2-methylbutan-2-ol. (c) 2-methylbutan-2-ol > 3-methylbutan-2-ol > pentan-1-ol. (d) 2-methylbutan-2-ol > pental-1-ol > 3-methylbutan-2-ol.

The letter ‘D’ in carbohydrates signifies- (a) dextrorotatory (b) configuration (c) diamagnetic nature (d) mode of synthesis