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Chemistry Test ...

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  • Question 1
    4 / -1

    Directions For Questions

    The coordination number of Ni+2 is = 4

    NiCl2 +KCN (Complex) → A (Complex)

    A +Conc.HCl (Maximun) →B (Chloro complex) 

    ...view full instructions

    The IUPAC name of A and B are :-

  • Question 2
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    In the following reaction

    Identify 'B' ?

  • Question 3
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    Magnetic moment of Xn+ (Z = 26) is √24 B.M. Hence, number of unpaired electrons and value of n respectively are :

  • Question 4
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    The give successive ionisation energies of an element X are 800, 1427, 2658, 25024 and 32824 kJ mol-1 respectively. The valency of X is :

  • Question 5
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    Which order are correct ? 

    (I) Thermal stability : Li2CO3 < Na2CO3 < K2CO3
         < Rb2CO3 < Cs2CO3

    (II) Solubility in water : Be (OH)2 < Mg(OH)2
         < Ca (OH)2 < Sr(OH)2 < Ba(OH)2

    (III) Basic nature : Li2O < Na2O < K2O
         < Rb2O < Cs2O

    (IV) Melting point : NaCl > MgCl2 > AlCl3

  • Question 6
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    Which oxide is a basic oxide:

  • Question 7
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    Statement-1 : The bond angle in BF3 is smaller than that in BF4–.

    Statement-2 : BF3 has sp2-hybridisation, whereas BF4– has sp3-hybridisation.

  • Question 8
    4 / -1

    Given the following bond enthalpies :

    BE(N≡N) =942 kJ/mol ; BE(H–H) =436 kJ/mol ;

    BE(N–N) =163 kJ/mol ; BE(N–H) =390 kJ/mol

    Determine enthalpy change for the following polymerisation reaction per mole of N2(g) consumed -

    nN2(g) + nH2(g) → –(– NH – NH –)n–

  • Question 9
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    The decomposition of azo methane, at certain temperature according to the equation (CH3)2N2 → C2H6 + N2 is a first order reaction. After 40 minutes from the start, the total pressure developed is found to be 350 mm of Hg in place of initial 200 mm of Hg of azo methane. The value of rate constant K is :-

  • Question 10
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    Which of the following option show correct matches :-

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