Chlorine, bromine and iodine belong to the same group and
are gaseous at room temperature.
form white precipitate with AgNO3(aq)
react violently with hydrogen without heating
react with alkali
Correct answer is D
No explanation has been provided for this answer.
Which of the following arrangements is in order of increasing metallic property?
Li < Na< k
Na < Li < K
K
K < Li < Na
Correct answer is A
No explanation has been provided for this answer.
Which of the following hydrohalic acids is the weakest?
HBr
HCI
HF
HI
Correct answer is D
No explanation has been provided for this answer.
The energy change that accompanies the addition of an electron to an isolated gaseous atom is
bond energy
electronegativity
electron affinity
ionization energy
Correct answer is C
No explanation has been provided for this answer.
Which of the following elements would produce coloured ions in aqueous solution?
Calcium
lron
Magnesium
Sodium
Correct answer is B
No explanation has been provided for this answer.