If an organic compound decolorizes bromine water then the compound is?
saturated
supersaturated
unsaturated
a solid
protonated
Correct answer is C
No explanation has been provided for this answer.
When sodium nitrate dissolves in water, ∆H is positive. This means that?
the reaction is catalysed
the reaction is complete
the reaction is exothermic
the reaction is endthermic
sodium nitrate is highly soluble in water
Correct answer is D
No explanation has been provided for this answer.
44.8 dm3
11.2 dm3
100.1 dm3
3.0 dm3
22.4 dm3
Correct answer is B
Na2CO3 + 2HCI → 2NaCI +H2O + CO2
53 gm Na2CO3 will therefore liberate (22.4)/(106) x (53)/(1) = 11.2 dm3
5 cm3
25 cm3
50 cm3
75 cm3
100 cm3
Correct answer is D
2H2 + O2 → 2H2O
2V3 1V3 2V
50cm 100 —
50cm 25cm3 50cm3
Volume of gas left = (100 - 25)cm3 of O2 = 75 cm3 of O2
24.5 mole per dm3
0.2 mole per dm3
10.0 mole per dm3
20.0 mole per dm3
2.0 mole per dm3
Correct answer is E
9.8 gms KCIO3 dissolves in 40 cm3 of H.
In 100 cc we have (9.8)/(40) x (100)/(1) = 24.5 gm KCIO3
In 1000 cc we have 10 x 24.5
or 245 gms of KCIO3.
But mol wt of KCIO3 is 122.5
Solubility of KCIO3 is (245)/(122.5) = 2 moles per dm3 (E)