The differences in the properties of the first member of a group from those of the other members are due to
(i) the smaller size of atom.
(ii) presence of one inner shell of two electrons and
(iii) absence of d – orbitals.
Thursday, August 6, 2020
Why is nitrous oxide (N2O) used as an anaesthetic in dentistry?
N2O is used as an anaesthetic in dentistry because of its inertness.
Where is liquid nitrogen used for?
Liquid nitrogen is used as a refrigerant to preserve biological specimen, and also used for providing low temperature in super conductivity.
Why does H3PO3 acts as a reducing agent but H3PO4 does not?
H3PO3 contains one P H bond and hence acts as a reducing agent but H3PO4 does.
Which of the following is/are not known? PCl3, AsCl3, SbCl3, NCl5, BiCl5
(1) NCl5 (due to absence of
d-orbitals)
(2) BiCl5 (Bi5+ being an oxidizing
agent oxidizes Cl ion to Cl2 and Cl- ion being a reducing
agent reduces Bi5+ to Bi3+).
Related Questions:
(1) What are
"pyro" oxy acids?
(2) What are
"Ortho" or "Meta" oxyacids?
(3) What is structure of (HPO3) metaphosphoric acid?
(4) Why Meta Phosphoric acid always exit in a polymeric form?
(5) What are the
structural difference between oxides ( P4O6 and P4O10) of phosphorous?
(6) What are common
structural features of oxides (P4O6 and P4O10) of
phosphorous?
(7) What are the explanation of Different Bond length and
Bond Angle In P4O6 and P4O10 :
(8) What is
"calgon" ? Give structure and its uses?
(9) Structure of Oxy
acids of Phosphorous:
(10) What is
structure of (HPO3) metaphosphoric acid?
(11) What is
metaphophoric (HPO3)?
(12) Why polarity of Ammonia (NH3) is more than NF3 ?
(13) Why is nitrous oxide (N2O) used as an anaesthetic in
dentistry?
(14) Which is more
basic N(CH3)3 or N(SiH3)3 , explain?
(15) Trisilyl amine,
N(SiH3)3 is planar whereas trimethyl amines N(CH3)3 is pyramidal. Explain why?.
(16) What are
abnormal behaviour of Nitrogen atom as compared to other family members?
(17) What is product
obtained when N2O5 is treated with NaCl?
(18) Phosphorus can
form PCl5 but nitrogen can not form NCl5 why?
(18) Are all the five
bonds of PCl5 equivalent? Justify your answer.
(19) Why PCl3
hydrolysed while NCl3 can not be hydrolysed?
(20) Which of the following is/are not known? PCl3, AsCl3,
SbCl3, NCl5, BiCl5
(21) Why bond angle
of hydrides of group 15, decreases down the group?
(22) Why nitrogen
shows catenation properties less than phosphorus?
(23) Why Nitrogen is
fairly inert gas?
(24) Why Nitrogen (N2)
is less reactive at room temperature?
(25) Where is liquid nitrogen used for?
(26) Why Nitrogen
dioxide (NO2) dimerises to form Dinitrogen tetraoxide (N2O4)?
(27) Why Nitrogen
dioxide (NO2) is coloured but Dinitrogen tetraoxide (N2O4) is colourless?
(28) Which will
have very fast tendency to dimerized ClO2 or NO and
why?
(30) Why does H3PO3 acts as a reducing agent but H3PO4 does
not?
(31) Hypophosphorous
acid (H3PO2) and Phosphorous acid (H3PO3) act as as good reducing agents while
H3PO4 does not.Why?
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