SSC GD Constable Reasoning \\Chapter Series. [2022]#ssc.

Assertion : In the series Sc to Zn, the enthalpy of atomisation of zinc is the lowest. Reason : Zinc has greater number of unpaired electrons.

Assertion : In transition elements radii of 5d series are virtually the same as those of the corresponding members of 4d series. Reason : The filling of 4f orbitals before 5d orbitals results in regular decrease in atomic radii.

Balmer series was observed and analysed before the other series .Can you suggest a reason for such an order?

Assertion : Hofmann degradation of benzamide gives aniline . Reason : Hofmann bromamide degradation reaction can be used for descending amine series .

Assertion: In series combination of electric bulbs th ebulb of lower power emits more light than that of higher power bulb. Reason: The lower power bulb in series gets more current than the higher power bulb.

Assertion: Kirchhoff's junction rule can be applied to a juction of several lines or a point in a line. Reason : When steady current is flowing, there is no accumulation of charges at any junction in series with a galvonometer.

Assertion: Yb^(+2) is more stable in compare to Gd^(+2) Reason: The electronic configuration of Gd is [Xe] 4f^(7)5d^(2)6s^(2)

Give a reason why metals are arranged in a series called - activity series of metals. Name a metal which reacts with a] Cold water

Give a reason why metals are arranged in a series called - activity series of metals. Name a metal which reacts with b] Boiling water

Give a reason why metals are arranged in a series called - activity series of metals. Name a metal which reacts with c) Steam - to liberate hydrogen in each case.