(1). Most of the lanthanides are coloured due to present of unpaired electrons, they undergo

• (a). d-d transition
• (b). d-f transition
• (c). f-f transition
• (d). all of these
• (e). None of these

(2). Which statement is incorrect ?

• (a). Iron belongs to 3d-transition series of the periodic table
• (b). Iron belongs to f-block of the periodic table
• (c). Iron belongs to first transition series
• (d). Iron belongs to group VIII of the periodic table
• (e). None of these

(3). Silver nitrate is usually supplied in coloured bottles because it is

• (a). oxidized in air
• (b). decomposed in sunlight
• (c). explodes in sunlight
• (d). reactive towards air in sunlight
• (e). None of these

(4). The correct statement(s) among the following is/are (i) all the d- and f-block elements are metals (ii) all d- and f- block elements form coloured ions (iii) all d- and f- block elements are paramagnetic

• (a). (i) only
• (b). (i) and (ii)
• (c). (ii) and (iii)
• (d). (i),(ii) and (iii)
• (e). None of these

• (a). 1
• (b). 2
• (c). 3
• (d). 4
• (e). None of these

• (a). 1
• (b). 2
• (c). 3
• (d). 4
• (e). None of these

• (a). 1
• (b). 2
• (c). 3
• (d). 4
• (e). None of these

• (a). 4
• (b). 5
• (c). 6
• (d). 3
• (e). None of these

• (a). 1
• (b). 2
• (c). 3
• (d). 4
• (e). None of these

• (a). water is oxidised
• (b). electrons are reduced
• (c). silver is oxidised
• (d). silver is reduced
• (e). None of these