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12th Standard English Medium Chemistry Subject Book Back 1 Mark Questions with Solution Part - II

12th Standard

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Chemistry

Time : 01:00:00 Hrs
Total Marks : 15

    Part I

    15 x 1 = 15
  1. Which of the metal is extracted by Hall-Heroult process?

    (a)

    Al

    (b)

    Ni

    (c)

    Cu

    (d)

    Zn

  2. Which of the following reduction is not thermodynamically feasible?

    (a)

    \({ Cr }_{ 2 }{ O }_{ 3 }+2Al\longrightarrow { Al }_{ 2 }{ O }_{ 3 }+2Cr\)

    (b)

    \(\mathrm{Al}_2 \mathrm{O}_3+2 \mathrm{Cr} \longrightarrow \mathrm{Cr}_2 \mathrm{O}_3+2 \mathrm{Al}\)

    (c)

    \(3Ti{ O }_{ 2 }+4Al\longrightarrow 2A{ l }_{ 2 }{ O }_{ 3 }+3Ti\)

    (d)

    none of these

  3. Duralumin is an alloy of ______.

    (a)

    Cu, Mn

    (b)

    Cu, Al, Mg

    (c)

    Al, Mn

    (d)

    Al, Cu, Mn, Mg

  4. Which of the following is strongest acid among all?

    (a)

    HI

    (b)

    HF

    (c)

    HBr

    (d)

    HCl

  5. The catalytic behaviour of transition metals and their compounds is ascribed mainly due to _______.

    (a)

    their magnetic behaviour

    (b)

    their unfilled d orbitals

    (c)

    their ability to adopt variable oxidation states

    (d)

    their chemical reactivity

  6. Crystal field stabilization energy for high spin d5 octahedral complex is _______.

    (a)

    -0.6\({ \Delta }_{ 0 }\)

    (b)

    0

    (c)

    2(P-\({ \Delta }_{ 0 }\))

    (d)

    2(P+\({ \Delta }_{ 0 }\))

  7. In calcium fluoride, having the fluorite structure the coordination number of Ca2+ ion and F- Ion are ________.

    (a)

    4 and 2

    (b)

    6 and 6

    (c)

    8 and 4

    (d)

    4 and 8

  8. For a first order reaction A ⟶ product with initial concentration x mol L-1, has a half life period of 2.5 hours. For the same reaction with initial concentration \(\left( \frac { x }{ 2 } \right) \) mol L-1 the half life is

    (a)

    (2.5 x 2) hours

    (b)

    \(\left( \frac { 2.5 }{ 2 } \right) \) hours

    (c)

    2.5 hours

    (d)

    Without knowing the rate constant, t1/2 cannot be determined from the given data

  9. Which of the following fluro compounds is most likely to behave as a Lewis base?

    (a)

    BF3

    (b)

    PF3

    (c)

    CF4

    (d)

    SiF4

  10. Which of the following electrolytic solution has the least specific conductance?

    (a)

    2N

    (b)

    0.002N

    (c)

    0.02N

    (d)

    0.2N

  11. The most effective electrolyte for the coagulation of As2S3Sol is _______.

    (a)

    NaCl

    (b)

    Ba(NO3)2

    (c)

    K3[Fe(CN)6]

    (d)

    Al2(SO4)3

  12. The correct IUPAC name of the compound

    (a)

    4 – chloro – 2,3 – dimethyl pentan – 1-ol

    (b)

    2,3 – dimethyl – 4- chloropentan -1-ol

    (c)

    2,3,4 – trimethyl – 4- chlorobutan -1-ol

    (d)

    4– chloro – 2,3,4 – trimethyl pentan – 1-ol

  13. Benzoic acid \(\overset { i){ NH }_{ 3 } }{ \underset { ii)\Delta }{ \longrightarrow } } A\overset { NaOBr }{ \longrightarrow } B\overset { NaN{ O }_{ 2 }/HCl }{ \longrightarrow } \) C 'C'  is ______.

    (a)

    anilinium chloride

    (b)

    O – nitro aniline

    (c)

    benzene diazonium chloride

    (d)

    m– nitro benzoic acid

  14. An alkene “A” on reaction with O3 and Zn - H2O gives propanone and ethanol in equimolar ratio. Addition of HCl to alkene “A” gives “B” as the major product. The structure of product “B” is ______.

    (a)

    \(Cl-{ CH }_{ 2 }-CH_{ 2 }-\overset { \overset { CH_{ 3 } }{ | } }{ \underset { \underset { CH_{ 3 } }{ | } }{ CH } } \)

    (b)

    \({ H }_{ 3 }C-{ CH }_{ 2 }-\overset { \overset { CH_{ 2 }Cl }{ | } }{ CH } -{ CH }_{ 3 }\)

    (c)

    \(\\ { H }_{ 3 }C-{ CH }_{ 2 }-\overset { \overset { CH_{ 3 } }{ | } }{ \underset { \underset { CL{ } }{ | } }{ C } } -{ CH }_{ 3 }\)

    (d)

    \({ H }_{ 3 }C-{ CH }-\overset { \overset { CH_{ 3 } }{ | } }{ \underset { \underset { Cl }{ | } }{ C } } \)

  15.  _______.

    (a)

    H3PO2 and H2O

    (b)

    H+/H2O

    (c)

    HgSO4/H2SO4

    (d)

    Cu2Cl2

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