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1) When electron jump into orbit 1 then series obtained is a. Lyman b. Paschen c. Pfund d. Brackett
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2) Neutrons moving with an energy of 1.2 MeV are called a. Fast neutrons b. Slow neutrons c. Moderate neutrons d. All are possible
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3) Splitting of spectral lines when atoms are subjected to strong electric filed is called a. Zeeman effect b. Stark effect c. Photoelectric effect d. Compton effect
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4) Three quantum number have been derived from equation of a. de-Broglie b. Plancks c. Schrodinger d. Heisenberg
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5) The pH of 10-3 mol dm-3 of an aqueous solution of H2SO4 is a. 3 b. 2.7 c. 2 d. 1.5
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6) Kc value has a. No units b. Units c. Both a & b d. None
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7) If a buffer solution of higher pH than seven is to be made we use a. Strong acid and strong base b. Weak acid and strong base c. Weak acid and strong base d. Weak acid and its salt with strong base
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8) Sodium benzoate and benzoic acid are mixed in equimolar ration to form buffer if pKa is 2 what will be the pH? a. 0 b. 1 c. 2 d. any one
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9) AgCl dissolved with conc (2x10-2) Ksp will be a. 3.6 x 10-6 b. 3.6 x 10-5 c. 7.2 x 10-6 d. 4 x 10-4
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10) In which of the following equilibria will Kc and Kp have the same value? a. PCI5 = PCI3 + Cl2 b. N2 + 3H2 = 2NH c. 2CO + O2 = CO2 d. N2 + O2 = 2NO
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11) pH of an aqueous solution is 5.5. The hydroxyl ion conc. In the solution would be a. ?5.5 b. ?8.5 c. 10-8.5 d. 10
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12) Which of following is not a base a. KOH b. NH3 c. PH3 d. BF3
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13) Which set of solutes will form a buffer when dissolved in water to make 1 litter of solution? a. 0.0002M HCI b. 0.2 mole of NaCI with 0.2 mole of HNO3 c. 0.4 mole of CH3COOH with 0.4 mole of NaOH d. 0.4 mole of NH3 with 0.2 mole of HCI
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14) Which one of the following aqueous solutions will be basic? a. NaCI b. Na2SO4 c. Na2CO3 d. FeCl3
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15) Reaction which proceeds in both directions is called a. reversible b. irreversible c. spontaneous d. non-spontaneous
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16) Chemical equilibrium state is a. dynamic state b. static state c. free state d. unidirectional state
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17) Conversion of reactant into product in unit time is called a. rate of forward reaction b. rate of backward reaction c. rate constant d. rate co-efficient
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18) At start of reaction the concentration of reactants is a. high b. low c. according to Kc d. constant
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19) Unit of Kc is a. moles2dm+6 b. moles-2dm+6 c. moles+2dm-6 d. Kc may or may not have units
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20) In case of gases Kc is replaced by a. Ka b. Kb c. Kp d. K
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21) Rate expression for ammonia synthesis is a. Kc=x2/(a-x)(b-x) b. Kc=x2/v(a-x) c. Kc=4x2/(a-2x)2(b-x) d. Kc=4x2v2/(a-x)(b-3x)3
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22) When the value of Kc is very small then a. reaction is at start b. product conc. Is maximum c. reactant conc. Is minimum d. reaction is completed
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23) Catalyst used to speed up the reaction of ammonia synthesis is a. V2O5 b. V2O5 and Pt c. Fe d. Pieces of Fe crystals are embedded in fused mixture of MgO Al2O3 and SiO2
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24) By the addition of base in waterpH will be a. more than 7 b. less than 7 c. equal to 7 d. no effect
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25) Idea of pH and pOH was put forward by a. Gibbs b. Einstein c. Sorenson d. Chadwick
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26) Negative log of mular concentration of H+ ions is called a. pH b. pOH c. pKa d. pKw
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27) Ka<10-3 means a. Very strong base b. Very weak acid c. Very strong acid d. Very strong salt
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28) Any substance which accepts H+ is base favours the concept a. Lowrys b. Lewis c. Arrhenius d. None of these
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29) Conjugated base of a weak acid is a. weak b. strong c. moderately weak d. unstable
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30) When sparingly soluble salt is in equilibrium with molar concentration of its oppositely charged ion when the product is called a. common ion effect b. solubility product c. dissociation constant d. dissociation constant for an acid
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31) Solution having the property of a very little change in pH on adding a small amount of strong acid or base is called a. buffer solution b. normal solution c. standard solution d. neutral solution
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32) Addition of CH3COOH and CH3COONa gives in water a. Standard solution b. buffer solution c. acidic buffer solution d. both b & c
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33) Which one of the following is a buffer solution? a. brine b. blood c. glue d. solution of CuSO4
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34) Solubility of any salt can be determined from a. Ka b. Kb c. Kc d. Ksp
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35) The pH of human blood is a. 7 b. 7.35 c. 7.5 d. 7.8
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36) By decreasing the pressure the reaction will go to that direction where a. volume is decreased b. volume increased c. heat absorbed d. no. of moles of specie decreased
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37) Equilibrium state is achieved quickly by the addition of. a. reactants b. acid c. base d. catalyst
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38) The rate of reaction a. Increases as the reaction proceeds b. Decreases as the reaction proceeds c. Remains the same as the reaction proceeds d. May decrease or increase as the reaction proceeds
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39) The addition of a catalyst to the reaction system a. Increases the rate of forward reaction only b. Increases the rate of reverse reaction c. Increases the rate of forward but decreases the rate of backward reaction d. Increases the rate of forward as well as backward reaction equally
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40) The specific rate constant of a first order reaction depends on the a. Time b. Concentration of the reactant c. Temperature d. Concentration of the product
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41) On increasing the temperature the rate of reaction increases mainly because a. The activation energy of the reaction increases b. Concentration of the reacting molecules increases c. Collision frequency increases d. None of these
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42) The value of activation energy is primarily determined by a. Temperature b. Effective collision c. Concentration of reactants d. Chemical nature of reactants and products
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43) Sum of exponents of molar concentration is called a. Order of reaction b. Molecularity c. Rate of reaction d. Average of reaction
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44) Spontaneous reactions are a. Moderate b. Slow c. Fast d. not natural
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45) In rate expression the concentration of reactants is negative. It shows a. Concentration of reactant does not change b. Concentration of product increases c. Concentration of reactant decreases d. Concentration of reactant increases
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46) Unit of rate of reaction is a. Moles dm-3 sec-1 b. Moles dm-3 c. Moles sec-1 d. Mol-1 dm3 sec-1
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47) When a graph is plotted between 1/T on X-axis and log k on y-axis a straight line is obtained with a negative slope which has two end in a. I and II quadrant b. II and III quadrant c. III and IV quadrant d. II and IV quadrant
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48) Rate of disappearance of reactant is equal to a. Rate of reaction b. Rate of formation of product c. Energy released during reaction d. a and b
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49) Rate of reaction when concentration of reactants are taken as unity is called a. Arrhenius constant b. Molecularity c. Specific rate constant d. Ideal rate constant
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50) For 3rd order reaction the hhalf life is inversely proportional to initial concentration of reactants a. Single b. Square c. Cube d. Raise to power four
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