[{"id":252729,"question":"If Kc value is small then equilibrium position will shift","choices":[{"text":"Towards left","value":"A"},{"text":"Remains unchanged","value":"B"},{"text":"Towards right","value":"C"},{"text":"lt is always constant value","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252728,"question":"A basic buffer solution can be prepared by mixing?","choices":[{"text":"Weak acid and its salt with strong base","value":"A"},{"text":"Weak base and its salt with strong acid","value":"B"},{"text":"Strong acid and its salt with weak base","value":"C"},{"text":"Strong base and its salt with strong acid","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252727,"question":"The solubility of A2B3 is X mole dm-3. Its Ksp is?","choices":[{"text":"6X(5)","value":"A"},{"text":"36X(5)","value":"B"},{"text":"64X(5)","value":"C"},{"text":"108X(5)","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252726,"question":"The pH of neutral water is 6.8 then the temperature of H2O is","choices":[{"text":"25°C","value":"A"},{"text":"More than 25°C","value":"B"},{"text":"less than 25 C°","value":"C"},{"text":"Not predicted","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252725,"question":"Which Henderson equation is not correct?","choices":[{"text":"pH= pKa +log [ salt/acid]","value":"A"},{"text":"pH = pKa - log [ salt/acid ]","value":"B"},{"text":"pH= pKa - log[ acid/salt ]","value":"C"},{"text":"Pka = pH - log [ salt/acid ]","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252724,"question":"Which one of the following has the lowest pH values","choices":[{"text":"0.1 M HCI","value":"A"},{"text":"0.01 M HCl","value":"B"},{"text":"0.1 M KOH","value":"C"},{"text":"0.01 M KOH","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252722,"question":"On adding NH3 to water","choices":[{"text":"lonic product will increase","value":"A"},{"text":"[H3O+] will inerease","value":"B"},{"text":"lonic product will decrease","value":"C"},{"text":"[H3O+] will decrease","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252716,"question":"The units of ionic product of H2O is","choices":[{"text":"Mole dm-3","value":"A"},{"text":"Mole2 dm-6","value":"B"},{"text":"Mole-1 dm-3","value":"C"},{"text":"Mole-2 dm-6","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252715,"question":"According to Lowery Bronsted concept, which of the following is considered as an acid?","choices":[{"text":"BF3","value":"A"},{"text":"OH-","value":"B"},{"text":"H3O+","value":"C"},{"text":"Cl-","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252713,"question":"With increase in temperature, ionic product of H2O","choices":[{"text":"Decreases","value":"A"},{"text":"Remains same","value":"B"},{"text":"Increases","value":"C"},{"text":"May increase or decrease","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252711,"question":"Which of the following is a base according to lowery Bronsted concept?","choices":[{"text":"I-1","value":"A"},{"text":"HCl","value":"B"},{"text":"H3O+","value":"C"},{"text":"NH4+1","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252710,"question":"A certain buffer solution contains equal cone. of X- and HX. Ka for HX is 10(-8). The pH of buffer is","choices":[{"text":"3","value":"A"},{"text":"11","value":"B"},{"text":"8","value":"C"},{"text":"14","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252709,"question":"For N2: +3H2&lt;--------&gt; 2NH3, if Kc is 1 than value of Kp at 273K would be","choices":[{"text":"1/22.414","value":"A"},{"text":"1/(22.414)2","value":"B"},{"text":"22.414","value":"C"},{"text":"11.207","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252708,"question":"At equilibrium, the concentration of reactants and products are","choices":[{"text":"Constant","value":"A"},{"text":"Maximum","value":"B"},{"text":"Different","value":"C"},{"text":"Equal","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252706,"question":"Buffer action can be explained by except","choices":[{"text":"Common ion effect","value":"A"},{"text":"Le-Chatelier's principle","value":"B"},{"text":"Law of mass action","value":"C"},{"text":"Solubility product","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252705,"question":"Buffer solutions are used in except","choices":[{"text":"Clinical analysis","value":"A"},{"text":"Nutrition","value":"B"},{"text":"Soil science","value":"C"},{"text":"Qualitative analysis","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252703,"question":"What will be the pH of 1.0 mol dm-3 of NH4OH, which is 1% dissociated","choices":[{"text":"2","value":"A"},{"text":"12","value":"B"},{"text":"0","value":"C"},{"text":"2.7","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252702,"question":"What will be the pH of 1.0 mol dm -3 of H2X, which is only 50% dissociated","choices":[{"text":"1","value":"A"},{"text":"0","value":"B"},{"text":"2","value":"C"},{"text":"Less than 0","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252700,"question":"The solubility product is only applicable for those substance whose molar concentrations is","choices":[{"text":"0.01","value":"A"},{"text":"Equal to 1","value":"B"},{"text":"Less than 0.01","value":"C"},{"text":"Greater than 10","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252697,"question":"If ionic product is equal to Ksp then the solution is","choices":[{"text":"Unsaturatec","value":"A"},{"text":"Ideal","value":"B"},{"text":"Supersaturated","value":"C"},{"text":"Saturated","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252696,"question":"The pH of ideal buffer is","choices":[{"text":"10","value":"A"},{"text":"7","value":"B"},{"text":"Less than 7","value":"C"},{"text":"0","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252695,"question":"Which one is best buffer those have","choices":[{"text":"pH = pKa","value":"A"},{"text":"pH &gt; pKa","value":"B"},{"text":"pOH &lt; pKb","value":"C"},{"text":"pKa =0","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252694,"question":"A basic buffer solution can be prepared by mixing","choices":[{"text":"Strong acid and its salt with weak base","value":"A"},{"text":"Weak base and its salt with strong acid","value":"B"},{"text":"Strong base and its salt with weak acid","value":"C"},{"text":"Weak acid and its salt with strong base","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252692,"question":"Which one increases by common ion effect except?","choices":[{"text":"Crystallization","value":"A"},{"text":"Solubility","value":"B"},{"text":"Association of ions","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252689,"question":"Which one is correct about conjugate acid-base concept?","choices":[{"text":"Conjugate base of a very weak acid is relatively very strong","value":"A"},{"text":"Conjugate base of a very weak acid is relatively very weak","value":"B"},{"text":"Conjugate base of a very strong acid is relatively very weak","value":"C"},{"text":"Both A and C","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252687,"question":"Which one is very weak acid","choices":[{"text":"HF","value":"A"},{"text":"HCI","value":"B"},{"text":"H2CO3","value":"C"},{"text":"H2O","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252685,"question":"pH of an aqueous solution is 3.0 at 25°C. The hydrogen ion concentration in the solution would be","choices":[{"text":"0.001","value":"A"},{"text":"0.01","value":"B"},{"text":"0.0001","value":"C"},{"text":"10(-5)","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252684,"question":"Which statement is incorrect","choices":[{"text":"pH and [OH-] are inversely related to cach other","value":"A"},{"text":"pOH and [OH-] are inversely related to each other","value":"B"},{"text":"pH and [OH-] are directly related to each other","value":"C"},{"text":"pOH means potential of hydroxyl ion concentration","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252682,"question":"If the volume term is present in denominator of Kc expression, then which one is correct","choices":[{"text":"Increase in pressure will shift the reaction backward","value":"A"},{"text":"Increase in pressure will shift the reaction forward direction","value":"B"},{"text":"Decrease in volume will shift the reaction forward direction","value":"C"},{"text":"Reaction will not effected","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252681,"question":"If the temperature is inereased of following reaction, then will go in           N2 +3H2 &lt;---------&gt; .2NH3,  ∆H= -Ve","choices":[{"text":"Forward direction","value":"A"},{"text":"Reverse direction","value":"B"},{"text":"Remain constant","value":"C"},{"text":"Cannot be predicted","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252679,"question":"Correct relationship b/w Kc and Kp can be written as","choices":[{"text":"Kp=, Kc(R)∆n","value":"A"},{"text":"Kc=Kp (RT)∆n","value":"B"},{"text":"Kp.= Kc.(RT)∆n","value":"C"},{"text":"Kp=Kc (R/N)∆n","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252678,"question":"In which of the following Equilibria will Kc and Kp have not the same value","choices":[{"text":"2HI &lt;--------&gt; H2+I2","value":"A"},{"text":"2SO2 + O2 &lt;--------&gt; 2SO3","value":"B"},{"text":"N2 + O2 &lt;---------&gt; 2NO","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252676,"question":"For what value of Kc almost forward reaction is complete","choices":[{"text":"Kc.=10(-30)","value":"A"},{"text":"Kc.=1","value":"B"},{"text":"Kc = 10(30)","value":"C"},{"text":"Kc,=0","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252675,"question":"When HCI gas is passed through saturated solution of rock salt, the solubility of NaCl","choices":[{"text":"Increases","value":"A"},{"text":"May increase or decrease","value":"B"},{"text":"Decreases","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252674,"question":"The Kw. of water at 25 C° is given by","choices":[{"text":"10(-7)","value":"A"},{"text":"10(-10)","value":"B"},{"text":"10(-12)","value":"C"},{"text":"10(-14)","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252673,"question":"The most suitable temperature for preparing ammonia gas is","choices":[{"text":"250℃","value":"A"},{"text":"450℃","value":"B"},{"text":"350℃","value":"C"},{"text":"550℃","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252671,"question":"pH of 10-4 mole dm-3 of HCl","choices":[{"text":"2","value":"A"},{"text":"4","value":"B"},{"text":"3","value":"C"},{"text":"5","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252670,"question":"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?","choices":[{"text":"Ag+ and NO3-, only","value":"A"},{"text":"NO3- and Ba+2 only","value":"B"},{"text":"Ag+ and NO-3, and Ba+2 only","value":"C"},{"text":"CI- and NO-3, and Ba+2 only","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252668,"question":"The solubility product of AgCl is<br>2.0 x 10(-10) mol2 dm(-6). The maximum concentration Ag+ ions in the solution is:","choices":[{"text":"1.41 × 10(-5) mol. dm(-3)","value":"A"},{"text":"1.41 × 10(-10) mol. dm(-3)","value":"B"},{"text":"2.0 × 10(-10) mol. dm(-3)","value":"C"},{"text":"4.0 × 10(-20) mol. dm(-3)","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252667,"question":"In a given system, water and ice are in equilibrium, if the pressure is applied to the above system then","choices":[{"text":"Morc ice is formed","value":"A"},{"text":"Amount of ice and water will remain the same","value":"B"},{"text":"more ice is melted","value":"C"},{"text":"both A and B","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252666,"question":"The decomposition of N2O4 to NO2 is carried out at 280°C in chloroform. When quilibrium is reached. 0.2 moles of N2O4 and 0.02 mole of NO2 are present in 1:1 ratio The equilibrium constant for the reaction N2O4------&gt; 2NO2 is","choices":[{"text":"0.01","value":"A"},{"text":"0.001","value":"B"},{"text":"0.02","value":"C"},{"text":"0.002","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252664,"question":"For the reaction H2(g) +I2 (g) &lt;---------&gt; 2Hl(g). The equilibrium constant changes with","choices":[{"text":"Total pressure","value":"A"},{"text":"Catalyst","value":"B"},{"text":"Concentration of H2 and I2","value":"C"},{"text":"Temperature","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252663,"question":"The solubility of Fe(OH)3 is 'x' mole per dm3. Its Ksp would be","choices":[{"text":"9X3","value":"A"},{"text":"3X4","value":"B"},{"text":"27X4","value":"C"},{"text":"9X4","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252661,"question":"In a saturated solution of AgCl, the molar concentration of Ag+ and Cl- is 1.0x10(-5)M each. What is the value of Ksp","choices":[{"text":"1.0x10(-5)","value":"A"},{"text":"1.0x10(-15)","value":"B"},{"text":"0.1x10(-5)","value":"C"},{"text":"1.0x10(-10)","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252660,"question":"If the concentration of salt is greater than the acid in buffer solution, then the","choices":[{"text":"pH = pKa","value":"A"},{"text":"pH = pKb","value":"B"},{"text":"pH &gt; pKa","value":"C"},{"text":"pH &lt; pKb","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252658,"question":"The oxidation of SO2 to SO3 is exothermic reaction. The yield of SO3 will be maximum if","choices":[{"text":"Temperature is increased and pressure is kept constant","value":"A"},{"text":"Temperature is reduced and pressure is increased","value":"B"},{"text":"Both temperature and pressure are increased","value":"C"},{"text":"Both temperature and pressure are increased","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252656,"question":"<div>Consider the reaction</div><div>PCI5 (g) &lt;---------&gt; PCl3 (g) +Cl2 (g) in a closed container at equilibrium. At a fixed temperature, what will be the effect of adding more PCl5 on the equilibrium constant</div>","choices":[{"text":"It increases","value":"A"},{"text":"It remains unaffected","value":"B"},{"text":"It decreases","value":"C"},{"text":"Can't be predicted without Ki","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252655,"question":"In the reaction A2 (g) + 4B2 (g) &lt;-----------&gt; 2AB4 (g) such that ∆H &lt; 0, the formation of AB4(g) will be favoured at","choices":[{"text":"Low temperature and high pressure","value":"A"},{"text":"Low temperature and low pressure","value":"B"},{"text":"High temperature and low pressure","value":"C"},{"text":"High temperature and high pressure","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252654,"question":"In the reaction A2 (g) + 4B2 (g) &lt;-----------&gt; 2AB4 (g) such that ∆H &lt; 0, the formation of AB4(g) will be favoured at","choices":[{"text":"Low temperature and high pressure","value":"A"},{"text":"Low temperature and low pressure","value":"B"},{"text":"High temperature and low pressure","value":"C"},{"text":"High temperature and high pressure","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252647,"question":"Plastics are amorphous solids and","choices":[{"text":"have sharp melting points","value":"A"},{"text":"undergo clean cleavage when cut with knife","value":"B"},{"text":"do not undergo clean cleavage","value":"C"},{"text":"possess orderly arrangement over long distances","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252646,"question":"Amorphous means","choices":[{"text":"arranged","value":"A"},{"text":"ordered","value":"B"},{"text":"shaped","value":"C"},{"text":"shapeles (no arrangements)","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252644,"question":"The arrangement ABC, ABC .... is referred as","choices":[{"text":"cubic close packing","value":"A"},{"text":"octahedral close packing","value":"B"},{"text":"hexagonal close packing","value":"C"},{"text":"tetrahedral close packing","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252643,"question":"All the metal shine when they are freshly cut The reason is","choices":[{"text":"the conductivity of the metal is increased","value":"A"},{"text":"the process of cutting gives energy to the metal atoms","value":"B"},{"text":"the electrons become less delocalized according to valance bond theory","value":"C"},{"text":"the electrons are excited at higher energy levels and emit the photons when they fall back","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252642,"question":"The electrical conductivity of the metals decreases with the increasing temperature. This is because","choices":[{"text":"the number of free electrons decrease","value":"A"},{"text":"the bonds of the metal atoms become weak","value":"B"},{"text":"the to and fro motion of the metal ions decrease","value":"C"},{"text":"the increase of to and fro motion of the metal ions hinders the free movement of electrons","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252641,"question":"Metallic bonds have been explained by many theories. Luis Pauling has proposed a theory called","choices":[{"text":"molecular orbital theory","value":"A"},{"text":"electron gas theory","value":"B"},{"text":"band theory","value":"C"},{"text":"valence bond theory","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252639,"question":"How temperature affects the electrical conductivity of metals?","choices":[{"text":"Does not change at all","value":"A"},{"text":"Decreases with increasing temperature","value":"B"},{"text":"Increases with increasing temperature","value":"C"},{"text":"Decreases with decreasing temperature","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252638,"question":"Which attractive forces cause molecular solids to be formed?","choices":[{"text":"lonic","value":"A"},{"text":"Metallic","value":"B"},{"text":"Covalent","value":"C"},{"text":"van der Waals","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252637,"question":"in diamond a unit cell is tetrahedral and averall crystai structure is","choices":[{"text":"face centred cubic","value":"A"},{"text":"body centred cubic","value":"B"},{"text":"tetrahedral","value":"C"},{"text":"hexagonal","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252636,"question":"In diamond, which hybridization is there?","choices":[{"text":"sp2","value":"A"},{"text":"dsp2","value":"B"},{"text":"sp3","value":"C"},{"text":"sp","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252635,"question":"Which of the following solids does not have a covalent bond?","choices":[{"text":"Silica","value":"A"},{"text":"Copper","value":"B"},{"text":"Diamond","value":"C"},{"text":"Graphite","value":"D"},{"value":"E"}],"correctAnswer":2}]