The least stable hydride of 15th group elements is
BiH3
NH3
AsH3
SbH3
A.
BiH3
Thermal stability of hydrides of N family decreases gradually from NH3 to BiH3 due to increase in M - H bond strength down the group on account of increase in size of central atom.
Which one of the following oxides of nitrogen dimerises into colourless is solid/ liquid on cooling?
N2O
NO
N2O3
NO2
Halogens exist in -1,+ 1, + 3, + 5 and 47 oxidation states. The halogen that exists only in -1 state is
F
Cl
Br
I
Which of the following is the correct method of preparation of methyl fluoride?
CH4 + HF →
CH3OH + HF →
CH4 + F2 →
CH3Br + AgF →
Which of the following species can function both as oxidising as well as reducing agent?
Cl-
ClO-
Which of the following is used as an oxidiser in rocket propellants?
Ammonium perchlorate
Alcohol
Acrylic rubber
Polyurethane