Which of the following statements are incorrect regarding Mandleev’s

1.	Which of the following statements are incorrect regarding Mandleev’s periodic table? (a) Mandleev considered compounds formed by element with oxygen and hydrogen. (b) In the table Ni is placed before Co. (c) Eka-silicon in Mandleev’s periodic table is gallium. (d) The properties of elements are the periodic function of their atomic masses. (1) Only (b) (2) Only (c) (3) Both (b) & (c) (4) Both (a) & (d)
Answer» (3) Both (b) & (c) The wrong statements are: Ni placed before Co in Mandleev’s Periodic table and Eka-silicon in Mandleev’s periodic table is gallium.

Which of the following statements are incorrect regarding Mandleev’s periodic table? (a) Mandleev considered compounds formed by element with oxygen and hydrogen. (b) In the table Ni is placed before Co. (c) Eka-silicon in Mandleev’s periodic table is gallium. (d) The properties of elements are the periodic function of their atomic masses. (1) Only (b) (2) Only (c) (3) Both (b) & (c) (4) Both (a) & (d)

Answer»

(3) Both (b) & (c)

The wrong statements are: Ni placed before Co in Mandleev’s Periodic table and Eka-silicon in Mandleev’s periodic table is gallium.

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