questions

1. The solubility product of Ag₂CrO₄ is 1.9 x 10^-12. The volume of water in mL that can dissolve 4mg of Ag₂CrO₄ is about

(a) 150 mL       (b) 1000 mL      (c) 250 mL      (d) 500 mL

2. A mixture of aluminium and zinc weighing 1.67 g was completely dissolved in acid and evolved 1.69 L of hydrogen gas (measured at 273 K and 1 atm pressure). The amount of aluminum in the original mixture is approximately 

(KINDLY DO NOT ANSWER THIS AS THE OPTIONS ’T SEEM LOGICAL)

(a) 1.8 g      (b) 2.0 g        (c) 1.2 g      (d) 2.2 g   [ (b) is the only LOGICAL answer based on the options given ]

3. The structures of AlCl₃ and PCl₃ can be described as

(a) both planar      (b) both pyramidal    (c) planar and pyramidal respectively      (d) pyramidal and planar respectively

4. The precipitate of AgCl dissolves in

(a) conc. HNO₃   (b) excess HCl     (c) dil. H₂SO₄   (d) aq. Ammonia

5. orders for NO and NO⁺ are respectively

(a) 2.5 and 3         (b) 2 and 4        (c) 3.5 and 2.5        (d) 3 and 2

6. The atomic number of copper is 29, Its Effective Atomic Number (EAN) in [Cu(NH₃)₄]²⁺ is

(a) 40    (b) 29     (c) 35    (d) 36

7. For water, the maximum number of phases that can be in equilibrium is

(a) 1    (b) 2       (c) 3        (d) 4