JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank

done Significant figures Units for measurement Total Questions - 27

• question_answer1)
  One fermi is           [Haryana CEET 1994; DPMT 2004]
  A)
  \[{{10}^{-13}}\]cm            done clear
  B)
  \[{{10}^{-15}}\]cm done clear
  C)
  \[{{10}^{-10}}\]cm            done clear
  D)
  \[{{10}^{-12}}\]cm done clear
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• question_answer2)
  A picometre is written as
  A)
                  \[{{10}^{-9}}\]m                done clear
  B)
                  \[{{10}^{-10}}\]m done clear
  C)
                  \[{{10}^{-11}}\]m             done clear
  D)
                  \[{{10}^{-12}}\]m done clear
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• question_answer3)
  One atmosphere is equal to
  A)
                  101.325 K pa        done clear
  B)
                  1013.25 K pa done clear
  C)
                  \[{{10}^{5}}\]Nm              done clear
  D)
                  None of these done clear
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• question_answer4)
  Dimensions of pressure are same as that of                 [CBSE PMT 1995]
  A)
                  Energy    done clear
  B)
                  Force done clear
  C)
                  Energy per unit volume        done clear
  D)
                  Force per unit volume done clear
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• question_answer5)
  The prefix \[{{10}^{18}}\] is                                            [Kerala MEE 2002]
  A)
                  Giga        done clear
  B)
                  Nano done clear
  C)
                  Mega       done clear
  D)
                  Exa done clear
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• question_answer6)
  Given the numbers : 161cm, 0.161cm, 0.0161 cm. The number of significant figures for the three numbers are [CBSE PMT 1998]
  A)
                  3, 4 and 5 respectively         done clear
  B)
                  3, 3 and 3 respectively done clear
  C)
                  3, 3 and 4 respectively         done clear
  D)
                  3, 4 and 4 respectively done clear
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• question_answer7)
  Significant figures in 0.00051 are
  A)
                  5              done clear
  B)
                  3 done clear
  C)
                  2              done clear
  D)
                  4 done clear
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• question_answer8)
  Which of the following halogen can be purified by sublimation                                     [Manipal PMT 2001]
  A)
                  \[{{F}_{2}}\]         done clear
  B)
                  \[C{{l}_{2}}\] done clear
  C)
                  \[B{{r}_{2}}\]       done clear
  D)
                  \[{{I}_{2}}\] done clear
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• question_answer9)
  Difference in density is the basis of                     [Kerala MEE 2002]
  A)
                  Ultrafiltration          done clear
  B)
                  Molecular sieving done clear
  C)
                  Gravity Separation                done clear
  D)
                  Molecular attraction done clear
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• question_answer10)
  Which of the following elements of matter would best convey that there is life on earth
  A)
                  Oxygen   done clear
  B)
                  Hydrogen done clear
  C)
                  Carbon   done clear
  D)
                  Iron done clear
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• question_answer11)
  The compound which is added to table salt for maintaining proper health is
  A)
                  KCl         done clear
  B)
                  \[KBr\] done clear
  C)
                  \[NaI\]     done clear
  D)
                  \[MgB{{r}_{2}}\] done clear
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• question_answer12)
  Which of the following contains only one element
  A)
                  Marble    done clear
  B)
                  Diamond done clear
  C)
                  Glass       done clear
  D)
                  Sand done clear
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• question_answer13)
  In known elements, the maximum number is of [CPMT 1985]
  A)
                  Metals     done clear
  B)
                  Non-metals done clear
  C)
                  Metalloids              done clear
  D)
                  None of these done clear
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• question_answer14)
  Which one of the following is not an element
  A)
                  Diamond                done clear
  B)
                  Graphite done clear
  C)
                  Silica       done clear
  D)
                  Ozone done clear
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• question_answer15)
  A mixture of \[ZnC{{l}_{2}}\] and \[PbC{{l}_{2}}\] can be separated by [AFMC 1989]
  A)
                  Distillation              done clear
  B)
                  Crystallization done clear
  C)
                  Sublimation           done clear
  D)
                  Adding aceitic acid done clear
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• question_answer16)
  A mixture of methyl alcohol and acetone can be separated by                                                       [Manipal PMT 2001]
  A)
                  Distillation done clear
  B)
                  Fractional distillation done clear
  C)
                  Steam distillation   done clear
  D)
                  Distillation under reduced pressure done clear
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• question_answer17)
  In the final answer of the expression \[\frac{(29.2-20.2)\,(1.79\times {{10}^{5}})}{1.37}\]. The number of significant figures is                     [CBSE PMT 1994]
  A)
                  1              done clear
  B)
                  2 done clear
  C)
                  3              done clear
  D)
                  4 done clear
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• question_answer18)
  81.4 g sample of ethyl alcohol contains 0.002 g of water. The amount of pure ethyl alcohol to the proper number of significant figures is
  A)
                  81.398 g                done clear
  B)
                  71.40 g done clear
  C)
                  91.4 g     done clear
  D)
                  81 g done clear
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• question_answer19)
  The unit J \[P{{a}^{-1}}\]is equivalent to
  A)
                  \[{{m}^{3}}\]      done clear
  B)
                  \[c{{m}^{3}}\] done clear
  C)
                  \[d{{m}^{3}}\]   done clear
  D)
                  None of these done clear
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• question_answer20)
  From the following masses, the one which is expressed nearest to the milligram is
  A)
                  16 g        done clear
  B)
                  16.4 g done clear
  C)
                  16.428 g                done clear
  D)
                  16.4284 g done clear
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• question_answer21)
  The number of significant figures in \[6.02\times {{10}^{23}}\]is
  A)
                  23           done clear
  B)
                  3 done clear
  C)
                  4              done clear
  D)
                  26 done clear
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• question_answer22)
  The prefix zepto stands for   [DPMT 2004]
  A)
                  \[{{10}^{9}}\]    done clear
  B)
                  \[{{10}^{-12}}\] done clear
  C)
                  \[{{10}^{-15}}\] done clear
  D)
                  \[{{10}^{-21}}\] done clear
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• question_answer23)
  The significant figures in 3400 are      [BHU 2004]
  A)
                  2              done clear
  B)
                  5 done clear
  C)
                  6              done clear
  D)
                  4 done clear
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• question_answer24)
  The number of significant figures in 6.0023 are                [Pb.CET 2001]
  A)
                  5              done clear
  B)
                  4 done clear
  C)
                  3              done clear
  D)
                  1 done clear
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• question_answer25)
  Given \[P=0.0030m\], \[Q=2.40m\], \[R=3000m\], Significant figures in \[P,\,Q\] and \[R\] are respectively           [Pb. CET 2002]
  A)
                  2, 2, 1     done clear
  B)
                  2, 3, 4 done clear
  C)
                  4, 2, 1     done clear
  D)
                  4, 2, 3 done clear
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• question_answer26)
  The number of significant figures in 60.0001 is [Pb. CET 2000]
  A)
                  5              done clear
  B)
                  6 done clear
  C)
                  3              done clear
  D)
                  2 done clear
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• question_answer27)
  A sample was weighted using two different balances. The result?s were (i) 3.929 g (ii) 4.0 g. How would the weight of the sample be reported
  A)
                  3.929 g   done clear
  B)
                  3 g done clear
  C)
                  3.9 g       done clear
  D)
                  3.93 g done clear
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