11.

Which of the following compounds is not chiral?

• 1-chloro-2-methyl pentane

• 2-chloropentane

• 1-chloropentane

• 3-chloro-2-methyl pentane

Which one of the following compounds will react with methyl magnesium iodide ?

• CH₃CH₂CH₂CH₂CH₃

• ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{C}\equiv \mathrm{CH}$

The point of dissimilarity between lanthanides and actinides is

• three outermost shells are partially filled

• they show oxidation state of + 3 (common)

• they are called inner transition elements

• they are radioactive in nature

The general electronic configuration of the transition elements is

• (n-1)d¹⁰, (n+1)s²

• (n- 1)d^1-10, (n + 1)s^1-2

• (n- 1)d^1-10, np⁶,ns²

• (n- 1)d^1-10, ns^1-2

Solutions A, B, C and D are respectively 0.1 M glucose, 0.05 M NaCl, 0.05 M BaCl₂ and 0.1 M AlCl₃. Which one of the following pairs is isotonic?

• A and B

• B and C

• A and D

• A and C

For the reaction: ${\mathrm{H}}_2 + {\mathrm{I}}_2 \to 2\mathrm{HI},$ the differential rate law is

• $-\frac{\mathrm{d} \left[{\mathrm{H}}_2\right]}{\mathrm{dt}}=-\frac{\mathrm{d} \left[{\mathrm{I}}_2\right]}{\mathrm{dt}}=2\frac{\mathrm{d}\left[\mathrm{HI}\right]}{\mathrm{dt}}$

• $-\frac{\mathrm{d} \left[{\mathrm{H}}_2\right]}{\mathrm{dt}}=-2\frac{\mathrm{d} \left[{\mathrm{I}}_2\right]}{\mathrm{dt}}=\frac{\mathrm{d}\left[\mathrm{HI}\right]}{\mathrm{dt}}$

• $-\frac{\mathrm{d} \left[{\mathrm{H}}_2\right]}{\mathrm{dt}}=-\frac{\mathrm{d} \left[{\mathrm{I}}_2\right]}{\mathrm{dt}}=\frac{\mathrm{d}\left[\mathrm{HI}\right]}{\mathrm{dt}}$

• $-\frac{\mathrm{d} \left[{\mathrm{H}}_2\right]}{\mathrm{dt}}=\frac{\mathrm{d} \left[{\mathrm{I}}_2\right]}{\mathrm{dt}}=\frac{\mathrm{d}\left[\mathrm{HI}\right]}{\mathrm{dt}}$

Calamine is

• CaCO₃

• MgCO₃

• ZnCO₃

• CaCO₃ + CaO

Which of the following ions is colourless in solution?

• V³⁺

• Cr³⁺

• Co²⁺

• Sc³⁺

Most common oxidation states of Ce (cerium) are

• +3, +4

• +2, +3

• +2, +4

• +3, +5

The vapour pressure of benzene at a certain temperature is 640 mm of Hg. A non-volatile and non-electrolyte solid weighing 2.175 g is added to 39.08 g of benzene. If the vapour pressure of the solution is 600 mm of Hg, what is the molecular weight of solid substance ?

• 49.50

• 59.60

• 69.60

• 79.82