Which of the following is/are the properties of \( \mathrm{d} \) block interstitial compounds?....

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Which of the following is/are the properties of \( \mathrm{d} \) block interstitial compounds?
P
(1) Their melting point is higher than that of pure
W
metals.
(2) They are hard.
(3) They retain metallic conductivity.
(4) They are chemically inert.


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