MDCAT Chemistry Unit 11 MCQs With Answer Keys

MDCAT Chemistry Unit 11 MCQs: Students can use the solved MCQs from MDCAT Chemistry Unit 11 to prepare for their tests. All of the topics in the unit are covered by the questions, which are a great way to test your knowledge. You can also find the answers so you can check your work.

Which of the following is most likely to get bigger when sodium borohydride is added to it? (I) Si—Si (II) C≡C (III) C=O (A) Only (A) Only (B) Only (C) Only (D) Only (I and II) Which of these three is likely to be less nucleophilic than the other two? (A) OH, (B) SH, (C) NH2, and (D) CH3. Which of the following is not a reduction reaction? (A) CH 3 CHO + 2H—→ CH 3 CH 3 + H 2 O (B) CH 3 CO 2 H + H 2 —→ CH 3 CH 3 + H 2 O.

MDCAT Chemistry MCQs Unit 11

MDCAT Chemistry Unit 11 solved MCQs|MDCAT Chemistry Unit 11 MCQs with keys|MDCAT Chemistry chapter wise solved MCQs chapter 11 Fsc part 1|

Fsc Part 1 Chemistry Unit 11 MCQs

(1) Which increase of 10C the rate of reaction double this increase the rate of reaction is due to
(a) Decrease in activation energy of the reaction
(b) Decrease in the number of collisions b/w reactants molecules
(C) Increase in activation energy of reactants
(d) Increase in number of effective collisions
(2) The sum of the exponents of the cone. Terms in the rate equation are called:
(a) Rate of reaction
(b) Order of reaction
(C) Specific rate constant
(d) Average rate
(3) Photochemical reaction usually has ordered:
(a) One
(b) Zero
(C) Two
(d) Three
(4) When the rate of reaction is entirely independent of the cone. of reactants molecule the
order of the reaction is:
(a) Zero
(b) First
(C) Second
(d) Third
(5) When a reaction occurs in many steps then the slowest step is the:
(a) Main step
(b) Enthalpy determining step
(C) Mechanism determining step
(d) Rate determining step

11th Class Chemistry Chapter-Wise MCQs:

(6) Spectrophotometry is applied for rate determination when:
(a) Reactants or product absorb (U.V and I.R. light
(b) Reaction involves ion
(C) Reaction involve a change in volume
(d) None of above
(7) Pt is poisoned by:
(a) Arsenic

(b) Silver
(c) Argon

(d) Zinc
(8) The minimum amount of energy required to convert reactants into the product is called
(a) Energy barrier
(b) Energy of activation
(C) Activated complex
(d) Activated MMC
(9) The reaction rate can be measured by:
(a) Graph method
b) Hit and trial method
(C) Both a and b
(d) None of these
(10) The reaction may be:
(a) Third order

(b) Forth order
(c) Both a and b

(d) None of these

1st-Year Chemistry MCQs Unit 11:

(11) The rate of a reaction depends upon:
(a) P
(b) T
(C) Concentration
(d) All of these
(12) The main function of a catalyst is to:
(a) Increase Ea
(b) Decrease Ea
(C) Decrease temp
(d) Decrease pressure
(13)——————are called biocatalysts:
(a) Organic acids
(b) Organic bases
(C) Enzymes
(d) All of these
(14) 3Fe+” 4H2O —— Fe304, + 4H2, is an example of
(a) Homogeneous
(b) Heterogeneous
(C) Isogeneous
(d) None of these
(15) The number of atoms molecules or ions whose cone. determine the rate of reacti% is
(a) Rate constant
(b) Value or reaction
(C) Order of reaction
(d) None
(16) The rate of a reaction may be:
(a) Zero-order
(b) Never zero order
(C) Without any order
(d) None

Fsc Chemistry Part 1 Chapter 11 MCQs:

(17) For a forward reaction according to collision theory the molecules must have energy:
(a) Greater than Ea
(b) Less than Ea “
(C) Equal to Ea
(d) None
(18) The change in the cone. of reactants and products in a unit time is called:
(a) Reaction rate
(b) Rate constant
1c) Diffusion
(d) None
(19) The reaction rate is expressed in the units of:
(a) mol dm”-3 S-1″‘
(b) mol dm”‘
(C) mol dm_3 N”‘
(d) dm”‘ S_’
(20) An increase in the cone. is related to the number of collisions:
(a) Directly
(b) Indirectly
(C) No more
(d) All
(21) The chemical reactions which may proceed slowly with a measurable rate are called:
(a) Slow reactions
(b) Fast reaction
(c) Moderate reactions
(d) None
(22) The actual number of atoms or molecules taking part in the rate-determining step is:
(a) Rate of a reaction
(b) Velocity of a reaction
(C) Order of a reaction
(d) Molecularity
(23) The energy of activation is usually expressed in:
(a) Calories
(b) Ergs
(c) Joules
(d) Moles
(24) The addition of a catalyst to a reaction changes the:
(a) Enthalpy
(b) Entropy . .
(C) Nature of reactants
(d) Energy of activation


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