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 lonization of KCIO3. is suppressed by Increasing temperatuse adding KCl adding NaNO3 Decreasing temperature
2 The value of Kc for H2O at 25C° is 1x10 (-14)mole dm-3 14 mol dm-3 1.86×10(-16) mol dm-3 1.0x10 (-7)moldm-3
3 If Kc value is small then equilibrium position will shift Towards left Remains unchanged Towards right lt is always constant value
4 A basic buffer solution can be prepared by mixing? Weak acid and its salt with strong base Weak base and its salt with strong acid Strong acid and its salt with weak base Strong base and its salt with strong acid
5 The solubility of A2B3 is X mole dm-3. Its Ksp is? 6X(5) 36X(5) 64X(5) 108X(5)
6 The pH of neutral water is 6.8 then the temperature of H2O is 25°C More than 25°C less than 25 C° Not predicted
7 Which Henderson equation is not correct? pH= pKa +log [ salt/acid] pH = pKa - log [ salt/acid ] pH= pKa - log[ acid/salt ] Pka = pH - log [ salt/acid ]
8 Which one of the following has the lowest pH values 0.1 M HCI 0.01 M HCl 0.1 M KOH 0.01 M KOH
9 On adding NH3 to water lonic product will increase [H3O+] will inerease lonic product will decrease [H3O+] will decrease
10 The units of ionic product of H2O is Mole dm-3 Mole2 dm-6 Mole-1 dm-3 Mole-2 dm-6
11 According to Lowery Bronsted concept, which of the following is considered as an acid? BF3 OH- H3O+ Cl-
12 With increase in temperature, ionic product of H2O Decreases Remains same Increases May increase or decrease
13 Which of the following is a base according to lowery Bronsted concept? I-1 HCl H3O+ NH4+1
14 A certain buffer solution contains equal cone. of X- and HX. Ka for HX is 10(-8). The pH of buffer is 3 11 8 14
15 For N2: +3H2<--------> 2NH3, if Kc is 1 than value of Kp at 273K would be 1/22.414 1/(22.414)2 22.414 11.207
16 At equilibrium, the concentration of reactants and products are Constant Maximum Different Equal
17 Buffer action can be explained by except Common ion effect Le-Chatelier's principle Law of mass action Solubility product
18 Buffer solutions are used in except Clinical analysis Nutrition Soil science Qualitative analysis
19 What will be the pH of 1.0 mol dm-3 of NH4OH, which is 1% dissociated 2 12 0 2.7
20 What will be the pH of 1.0 mol dm -3 of H2X, which is only 50% dissociated 1 0 2 Less than 0
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