SOLUTIONS

Solution

Friedel Crafts Acylation

SOLUTION

An amphoteric compound is a molecule or ion that can react both as an acid as well as a base. Many metals (such as copper, zinc, tin, lead, aluminium, and beryllium) form amphoteric oxides or hydroxides.

In acid: Al₂O_3?+6HCl ? 2AlCl₃?+3H₂?O

In base: Al₂O_3?+2NaOH+3H₂O ? 2Na[Al(OH)_4?] 

Hence, Al₂?O_3?? is an amphoteric oxide.

Solution

Theoretical density of a crystal is given by $$\rho = \cfrac {nM}{N_A a^3} \ g/cm^3$$

Given, $$M= 63.5 \ g \ ; \ \rho = 8.93 \ g/cm^3$$

For FCC, $$n=4$$

$$\Rightarrow a^3= \cfrac {4 \times 63.5}{6.022 \times 10^{23} \times 8.93}$$

$$\Rightarrow a = \left (\cfrac {4 \times 63.5}{6.022 \times 10^{23} \times 8.93}\right)^{1/3}= 3.6 \times 10^{-8} \ cm$$

Now, if $$r$$ is radius of copper atom, then in FCC,

$$r = \cfrac {a}{2 \sqrt 2}$$

$$r = \cfrac {3.6}{2 \sqrt 2} \times 10^{-8} \ cm= 127.8 \ pm$$

Solution

$$Mg+4HNO_3\longrightarrow Mg(NO_3)_2+2NO_2+2H_2O$$

SOLUTION

Cl₂O₆ (dimer of ClO₃) is mixed anhydride of HClO₃ and HClO₄.

SOLUTION

Sugar is nothing but sucrose, which has a formula of C??H??O?? and a molecular weight of 342.

number of moles of sucrose in 1.71 grams = 0.005

1 mole of sucrose contains Avogadro number(6 x 10²³) of sucrose molecules.
As each molecule of sucrose has 12 carbon atoms,
1 mole of sucrose contains 12( 6 x 10²³) of carbon atoms.

Therefore 0.005 moles of sucrose contains 0.005 x 12( 6 x 10²³)
                                                                 = 3.6 x 10²² atoms of carbon are  added

SOLUTION

SOLUTIONS

Reduction of alkyl cyanide with SnCl₂ | HCl to form an aldehyde is known as Stephen ‘s reduction.