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    DPP - 1

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    vergadiaarnav2106
    The document is a chemistry test containing 20 multiple choice questions related to topics of chemical bonding and molecular structure. The questions cover concepts such as bond types, bond order, molecular geometry, ionic compounds and their properties.

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    © All Rights Reserved
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    DPP - 1

    Uploaded by

    vergadiaarnav2106
    7 views4 pages
    The document is a chemistry test containing 20 multiple choice questions related to topics of chemical bonding and molecular structure. The questions cover concepts such as bond types, bond order, molecular geometry, ionic compounds and their properties.

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    The document is a chemistry test containing 20 multiple choice questions related to topics of chemical bonding and molecular structure. The questions cover concepts such as bond types, bond order, molecular geometry, ionic compounds and their properties.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    7 views4 pages

    DPP - 1

    Uploaded by

    vergadiaarnav2106
    The document is a chemistry test containing 20 multiple choice questions related to topics of chemical bonding and molecular structure. The questions cover concepts such as bond types, bond order, molecular geometry, ionic compounds and their properties.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 4

    Class : XIth Subject : CHEMISTRY

    Date : DPP No. : 1

    1. Topic :- Chemical Bonding and Molecular Structure


    The true statements from the following are
    1. P H 5 and BiC l 5 do not exist
    2. pπ−dπ bond is present in S O 2
    3.Electrons travel at the speed of light
    4. Se F 4 and C H 4 have same shape
    +¿¿
    5. I 3 has bent geometry
    a) 1,3 b) 1,2,5 c) 1,3,5 d) 1,2,4

    2. 1,3-butadiene has:

    a) 6 σ and 2 π -bonds b) 2 σ and 2 π -bonds c) 9 σ and 2 π -bonds d) 6 σ and 2 π -bonds

    3. The bond between atoms of two elements of atomic number 37 and 53 is:

    a) Covalent b) Ionic c) Coordinate d) Metallic

    4. In methane the bond angle is

    a) 180 ° b) 90 ° c) 109 ° d) 120 °

    5. One would expect the elemental form of Cs at room temperature to be:

    a) A network solid b) A metallic solid c) Non-polar liquid d) An ionic liquid

    6. Which of the following is false?

    a) Glycerol has strong hydrogen bonding

    b) Glycol is a poisonous alcohols

    c) Waxes are esters of higher alcohols with higher acids

    d) Alkyl halides have higher b.p. than corresponding alcohols


    7. Ionic radii are:

    a) ∝ 1
    effective nuclear charge
    b) ∝ 1
    ( effective nuclear charge )2
    c) ∝ effective nuclear charge

    d) 2
    ∝ ( effective nuclear charge )
    8. Which of the following statements is incorrect?

    a) H e does not exist because its bond order is zero


    2

    b) O ,O −¿¿ and O +¿¿ are all paramagnetic


    2 2 2

    c) Any two atomic orbitals can combine to form two molecular orbitals

    d) π (2 p ) and π (2 p )are degenerate molecular orbitals


    x y

    9. Which of the following pairs will from the most stable ionic bond?

    a) Na and Cl b) Mg and F c) Li and F d) Na and F

    10. Among NaF , NaCl NaBr∧NaI , the NaF has highest melting point because:

    a) It has maximum ionic character

    b) It has minimum ionic character

    c) It has associated molecules

    d) It has least molecular weight

    11. The planar structure of B F 3 can be explained by the fact that B F 3 is

    a) sp hybridized b) 2 c) 3 d) 3
    s p hybridised s p hybridised s p d hybridized

    12. The correct order of bond order value among the following is
    −¿¿ +¿¿
    (i) N O (ii) N O
    (iii)NO (iv) N O2+¿ ¿
    (v) N O2−¿¿
    a) ( i ) < ( iv ) < ( iii ) < ( ii ) <(v ) b) ( iv ) =( ii ) < ( i ) < ( v )<(iii)

    c) ( v )< ( i ) < (iv )=( iii ) <(ii) d) ( ii ) < ( iii ) < ( iv )< (i ) <(v )

    13. The bond between chlorine and bromine in BrC l 3 is:

    a) Ionic

    b) Non-polar

    c) Polar with negative end on B r−¿¿

    d) Polar with negative end on C l −¿ ¿

    14. Which of the following has regular tetrahedral shape?

    a) 2−¿ ¿ b) S F c) B F −¿¿ d) Xe F
    [ ¿ ( CN )4 ] 4 [ 4] 4

    15. Which of the following will have large dipole moment?

    NH2
    NH2
    NH2 NO2

    a) b) c) d)

    NO2
    NO2

    16. PC l 5 exists but NC l 5 does not because:

    a) Nitrogen has no vacant 2d -orbitals

    b) NC l is unstable
    5

    c) Nitrogen atom is much smaller than phosphorus

    d) Nitrogen is highly mert

    17. In which of the following pairs the two species are not isostructural?

    a) PC l +¿¿ and SiC l b) P F and Br F c) Al F 3−¿¿ and S F d) C O2−¿¿ and N O−¿¿


    4 4 5 5 6 6 3 3
    18. The molecule having a pyramidal shape out of the following is

    a) C O b) B F c) S F d) N H
    2 3 4 3

    19. If N a+¿ ¿ ion is larger than M g 2+¿¿ ion and S2−¿¿ is larger thanC l −¿ ¿ ion, which of the following
    will be stable soluble in water?
    a) Sodium chloride b) Sodium sulphide c) Magnesium chloride d) Magnesium sulphide

    20. An atom of an element A has three electrons in its outermost orbit and that of B has six
    electrons in its outermost orbit. The formula of the compound between these two will be
    a) A B b) A B c) A B d) A B
    3 6 2 3 3 2 2

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