PPSC Chemistry Part I Physical Chemistry Online Test With Answers

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PPSC Chemistry Part I Physical Chemistry Online Test

Sr. # Questions Answers Choice
1 Which of the following system has low as well as upper consolute temperature. Nicotine - water Aniline -water Triethlylamine -water Phenol -water
2 Which of the following is not correct criteria for an idea solution. Enthalpyh of mixing = 0 Volume of mixing = 0 Free energy of mixing = 0 Obeys Reoult's law
3 Solution with components which obeys Raoult's over the entire composition range are said to be. Real solution Regular solutions Dilute solutions Ideal Solution
4 Which of the following solutions of sulphuric acid will exactly neutralize 25 mL. of 0.2 M NaOH 12.5 mL of 0.1 M solution 24 mL OF 0.1 m Solution 50 mL of 0.1 M solution None of the above
5 The molarity of a 500 mL solution containing 4 g NaOH 0.1 0.2 0.3 0.4
6 How much amount of NaOH is required to prepare 100 mL of 1 N solution. 80 g 4 g 40 g zero
7 One ppm solution of NaOH Contain 1000 mg of the solute per how much of the volume of the solution. 1000 mL 100 mL 10 mL 1 mL
8 The number of formula weight of the solute dissolved per dm3 of the solution is called. Mole fraction Normality Formality Molaiity
9 The number of moles of solute dissolved in 1000 gram of the solvent is called Formality Molality Molarity Mole fraction
10 The number of gram equivalents of the solute per dm3 of the solution is called. Formality Normality Molality Molarity
11 The number of mole of the solute dissolved per dm3 of the solution is called. Molality Formality Normality Molarity
12 A 10% solution of sucrose contains 10 g of sucrose in how much volume of the solution. 10 mL 100 mL 1000 mL 1 mL
13 If there are only two components in a solution with mole fraction XAand XBthen which of the following relation is correct. X<sub>A</sub> + X <sub>B</sub> = 0 X <sub>A</sub> + X <sub>B</sub> &gt; 1 XA = XB &lt; 1 XA = 1 - XB
14 Which of the following concentration term is used in respect of standard solutions. Normality Formality Molarity All of above
15 If 20 ml of 0.5 N salt solution is diluted in one litre. what is the new concentration. 0.01 N 0.001 N 1 N 10 N
16 Which parameter of a chemical reaction will change with the use of a catalyst. Delta F, change in free energy Delta S, change in entropy Delta E , change in internal energy K, the rate constant
17 The pKa of acetic acid is 4.74 which implies that. pH of 1N solution is 4.74 At pH 4.74 the dissociation of acetic acid is maximum At pH 4.74 half of the acetic acid molecules are dissociated in the solution. At pH 4.74 the dissociation of acetic acid is minimum.
18 Which is the following is not a buffer. H2CO3/HCO3 NH4Cl/NH4OH CH3COOH/CH3COONa NH3OH/CH3COOH
19 Which of the following is a buffer solution. CH3COOH + NH4OH CH3 COOH + HCl CH3COOH + NaOH CH3COOH + CH3COONa
20 A pH of a neutral solution at 100 oC when Kw = 1.0 x 10-12 0 7 6 7
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