Question

Statement 1: Tungsten has very high melting point
Statement 2: Tungsten is a covalent compound

• A. If both Statement 1 and Statement 2 are true and the statement 2 is the correct explanation o f the statement 1.
• B. If both Statement 1 and Statement 2 are true but statement 2 is not the correct explanation o f the statement 1.
• C. If Statement 1 is true but Statement 2 is false.
• D. If Statement 1 is false but Statement 2 is true

Answer 1

Answer: (C)

Statement 1: True, The maxima at about the middle of each series indicate that one unpaired electron per d orbital is particularly favourable of strong interatomic interaction. In general, greater the number of valence electrons, stronger is the resultant bonding. $Cr, Mo$ and $W$ have maximum number of unpaired electrons and therefore, these are very hard metals and have maximum enthalpies of atomization. So tungsten has very high melting point.
Statement 2: False, It is not a covalent compound but is a metal, i.e., an element.