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Chemistry Test 178

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Chemistry Test 178
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  • Question 1
    4 / -1

    Arrange the numbers in increasing no. of significant figures.

    0.002600, 2.6000, 2.6, 0.260

    Solution

    2.6 has two significant figures.

    0.260 has three significant figures.

    0.002600 has four significant figures.

    2.6000 has five significant figures.

     

  • Question 2
    4 / -1

    Solution

     

  • Question 3
    4 / -1

    Which of the following elements represents highly electropositive as well as highly electronegative character in its period?

    Solution

    First period has H and He only out of which He is inert, hence, H behaves as a highly electropositive as well as electronegative.

     

  • Question 4
    4 / -1

    Solution

    In π bonding only d orbital of P, p orbital of O can be involved. Since hybrid atomic orbitals do not form π bond

     

  • Question 5
    4 / -1

    For gaseous state, if most probable speed is denoted by C*, average speed by C and mean square speed by C, then for a large number of molecules the ratios of these speeds are :

    Solution

     

  • Question 6
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  • Question 8
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  • Question 9
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    Which of the following chemicals is not present in clear hard water?

    Solution

     

  • Question 10
    4 / -1

    Solution

     

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