Substances which absorb water from the atmosphere without dissolving in it are sid to be
anhydrous
hygroscopic
insolube
hydrated
efflorescent
Correct answer is B
No explanation has been provided for this answer.
How many electrons are removed from Cr2- when it is oxidized to CrO42-?
0
2
4
8
10
Correct answer is D
From Cr2- to CrO42- involves 8 electrons to give oxidation state of Cr is +6
0.318g
0.635g
18g
6.35g
9.65g
Correct answer is A
Cu2+ + 2e- → Cu, From the equation 2 Faraday will liberate 63.5gm of copper The quantity of electricity passed (Q) Q = 1. 0 965 = 965 coulomb :. 2 x 96500 → 63.5, 965 → x. x = 965 / 2x96500 x 63.5 = 0.3175g \(\approx\) 0.328
I and II only
II and III only
I and III only
III and IV only
Correct answer is C
No explanation has been provided for this answer.
Glucose solution
Aqueous copper (ll) tetraoxosulphate (IV)
Dilute sodium chloride solution
Concentrated hydrochloric acid
Dilute copper (ll) chloride solution
Correct answer is C
No explanation has been provided for this answer.