MDCAT Chemistry Chapter 20 Macromolecules Online Test With Answers

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MDCAT Chemistry Chapter 20 Macromolecules Online Test

Sr. # Questions Answers Choice
1 The solubility product is only applicable for those substance whose molar concentrations is 0.01 Equal to 1 Less than 0.01 Greater than 10
2 If ionic product is equal to Ksp then the solution is Unsaturatec Ideal Supersaturated Saturated
3 The pH of ideal buffer is 10 7 Less than 7 0
4 Which one is best buffer those have pH = pKa pH > pKa pOH < pKb pKa =0
5 A basic buffer solution can be prepared by mixing Strong acid and its salt with weak base Weak base and its salt with strong acid Strong base and its salt with weak acid Weak acid and its salt with strong base
6 Which one increases by common ion effect except? Crystallization Solubility Association of ions All of these
7 Which one is correct about conjugate acid-base concept? Conjugate base of a very weak acid is relatively very strong Conjugate base of a very weak acid is relatively very weak Conjugate base of a very strong acid is relatively very weak Both A and C
8 Which one is very weak acid HF HCI H2CO3 H2O
9 pH of an aqueous solution is 3.0 at 25°C. The hydrogen ion concentration in the solution would be 0.001 0.01 0.0001 10(-5)
10 Which statement is incorrect pH and [OH-] are inversely related to cach other pOH and [OH-] are inversely related to each other pH and [OH-] are directly related to each other pOH means potential of hydroxyl ion concentration
11 If the volume term is present in denominator of Kc expression, then which one is correct Increase in pressure will shift the reaction backward Increase in pressure will shift the reaction forward direction Decrease in volume will shift the reaction forward direction Reaction will not effected
12 If the temperature is inereased of following reaction, then will go in N2 +3H2 <---------> .2NH3, ∆H= -Ve Forward direction Reverse direction Remain constant Cannot be predicted
13 Correct relationship b/w Kc and Kp can be written as Kp=, Kc(R)∆n Kc=Kp (RT)∆n Kp.= Kc.(RT)∆n Kp=Kc (R/N)∆n
14 In which of the following Equilibria will Kc and Kp have not the same value 2HI &lt;--------&gt; H2+I2 2SO2 + O2 &lt;--------&gt; 2SO3 N2 + O2 &lt;---------&gt; 2NO All of these
15 For what value of Kc almost forward reaction is complete Kc.=10(-30) Kc.=1 Kc = 10(30) Kc,=0
16 When HCI gas is passed through saturated solution of rock salt, the solubility of NaCl Increases May increase or decrease Decreases None of these
17 The Kw. of water at 25 C° is given by 10(-7) 10(-10) 10(-12) 10(-14)
18 The most suitable temperature for preparing ammonia gas is 250℃ 450℃ 350℃ 550℃
19 pH of 10-4 mole dm-3 of HCl 2 4 3 5
20 An excess af silver nitrate is added to the aqueous barium chloride and the precipitate is removed by filtration. What are the main ions in the filtrate? Ag+ and NO3-, only NO3- and Ba+2 only Ag+ and NO-3, and Ba+2 only CI- and NO-3, and Ba+2 only
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