Which one of the following reactions does not occur?
F2 + 2Cl- → 2F- + Cl2
Cl2 + 2F- → 2Cl- + F2
Br2 + 2I- → 2Br- + I2
Cl2 + 2Br- → 2Cl- + Br2
The formula of the product formed, when sodium thiosulphate solution is added to silver bromide is
Ag2S2O3
Ag2S
Na3[Ag(S2O3)2]
Ag3[Na(S2O3)2]
Which one of the following noble gases is used in miner's cap lamps ?
Helium
Neon
Argon
Krypton
The following are some statements related to VA group hydrides,
(I) Reducing property increases from NH3 to BiH3
(II) Tendency to donate lone pair decreases from NH3 to BiH3.
(III) Thermal stability of hydrides decreases from NH3 to BiH3.
(IV). Bond angle of hydrides decreases from NH3 to BiH3.
The correct statements are:
I, II, III and IV
I, III and IV
L, II and IV
I and IV
The type of bonds present in sulphuric anhydride are
3σ and three p-d
3σ and one p-p and two p-d
2σ and three p-d
2σ and two p-d
Which pair of oxyacids of phosphorus contains 'P-H' bonds?
H3PO4, H3PO3
H3PO5, H4P2O7
H3PO3, H3PO2
H3PO2, HPO3
Which one of the following is formed apart from sodium chloride when chlorine reacts with hot concentrated sodium hydroxide?
NaOCl
NaClO3
NaClO2
NaClO4
Helium mixed with oxygen is used in the treatment of
beri beri
burning feet
joints burning
asthma