The bleaching action of chlorine is due to
reduction
hydrogenation
chloronation
oxidation
Which of the following statements is not true?
HOCl is a stronger acid than HOBr
HF is a stronger acid than HCl
Among halide ions, iodide is the most powerful reducing agent
Fluorine is the only halogen that does not show a variable oxidation state
The oxidation states of sulphur in the anions SO ,S2O and S2O62- follows the order
S
S2O2O
SO22O
Which of the following metal ions play an important role in muscle contraction?
K+
Na+
Mg2+
Ca2+
Pure nitrogen is prepared in the laboratory by heating a mixture of
NH4OH +NaCl
NH4NO3+NaCl
NH4Cl+NaOH
NH4Cl+NaNO2
Which of the following statement is false?
Strontium decomposes water readily than beryllium
BaCO3 melts at a higher temperature than CaCO3
Barium hydroxide is more soluable in water than Mg(OH)2
Beryllium hydroxide is more basic than barium hydroxide
Which of the following statements is not correct for nitrogen?
Its electronegativity is very high
d-orbitals are available for bonding
It is a typical non-metal
Its molecular size is small
Which one of the following anions is present in the chain structure silicates?
Si2O
(Si2O2-5)n
(SiO32-)n
SiO
Strength of hydrogen bonding is shown by
Water
Ammonia
HF
Hydrogen sulphide
Which of the following oxides is not expected to react with sodium hydroxide?
B2O3
CaO
SiO2
BeO