MCQ
Highest ionisation energy stands for
- ✓$He$
- B$C$
- C$N$
- D$H$
✓
Answer
Correct option: A.
$He$
a
(a) $He$ has highest ionisation energy due to it full fill $1s$-orbital.
(a) $He$ has highest ionisation energy due to it full fill $1s$-orbital.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The number of structural isomers for $C_6H_{14}$ is
→Match List$-I$ with List$-II$
→| List$-I$ Name of oxo acid | List$-II$ Oxidation state of $P$ |
| $(a)$ Hypo phosphorous acid | $(i) +5$ |
| $(b)$ Orthophosphoric acid | $(ii)+4$ |
| $(c)$ Hypo phosphoric acid | $(iii) +3$ |
| $(d)$ Orth phosphorous acid | $(iv)+2$ |
| $(v)+1$ |
Choose the correct answer from the options given below
Which of the following is not a colligative property [
The heat of combustion of ethylene $C_2H_4(g)$ is $-1420\,kJ/mole$ . The number of litres of $C_2H_4$ at $NTP$ that would evolve $355\,kJ$ on combustion is
→The total number of alkenes possible by dehydrobromination of $3$-bromo$3$-cyclopentylhexane using alcoholic $KOH$ is
→The correct order of strengths of the carboxylic acids is
Which of the following complex compound $(s)$ is/are paramagnetic and low spin?
→$(I)\,K_3 [Fe(CN_6)]$ $(II)\, [Ni(CO)_4]^0$ $(III)\, [Cr(NH_3)_6]^{3+}$ $(IV)\, [Mn(CN)_6]^{4-}$
Choose the correct code
The product formed when glycerol reacts with $PCl_5$ is -
→Mark the false statement
Which compound does not possess linear geometry