Question: If a buffer solution of higher pH than seven is to be made we use___________________?

• 1. Strong acid and strong base
• 2. Weak acid and strong base
• 3. Weak acid and strong base
• 4. Weak acid and its salt with strong base

Question: AgCl dissolved with conc (2×10-2) Ksp will be__________________?

• 1. 3.6 x 10-6
• 2. 3.6 x 10-5
• 3. 7.2 x 10-6
• 4. 4 x 10-4

Question: Which of the following will not change the concentration of ammonia at the equilibrium ?

• 1. Increase of pressure
• 2. Increase of volume
• 3. Addition of catalyst
• 4. Decrease of temperature

Question: For a reaction involving only gases at 25?C the equilibrium constant can be expressed in terms of molarity Ke or partial pressure Kp. Which is true about the numerical value of Kp ?

• 1. Kc is generally greaer than Kp
• 2. Kc is generally less than Kp
• 3. Kc is generally equal to Kp
• 4. Kc is equal to Kp if the total moles of reactants and products are equal

Question: Which one of the following aqueous solutions will be basic ?

• 1. NaCI
• 2. Na2SO4
• 3. Na2CO3
• 4. FeCl3

Question: Reaction which proceeds in both directions is called_______________?

• 1. reversible
• 2. irreversible
• 3. spontaneous
• 4. non-spontaneous

Question: Conversion of reactant into product in unit time is called________________?

• 1. rate of forward reaction
• 2. rate of backward reaction
• 3. rate constant
• 4. rate co-efficient

Question: Unit of Kc is_______________?

• 1. moles2dm+6
• 2. moles-2dm+6
• 3. moles+2dm-6
• 4. Kc may or may not have units

Question: Rate expression for ammonia synthesis is___________________?

• 1. Kc=x2/(a-x)(b-x)
• 2. Kc=x2/v(a-x)
• 3. Kc=4×2/(a-2x)2(b-x)
• 4. Kc=4x2v2/(a-x)(b-3x)3

Question: Catalyst used to speed up the reaction of ammonia synthesis is________________________?

• 1. V2O5
• 2. V2O5 and Pt
• 3. Fe
• 4. Pieces of Fe crystals are embedded in fused mixture of MgO Al2O3 and SiO2