Atomic size decreases?
A. across a period from left to right B. across a period from right to left C. diagonally down the group D. down a group E. with decrease in atomic number Correct Answer: Option A – across a period from left to right
Sulphur has an oxidation number of +4 in?
A. H2S B. H2SO4 C. MgSO4 D. Na2SO3 E. S03 Correct Answer: Option D – Na2SO3
If the volume of a gas at 35°C is 60cm³, what would be its volume in cm³ at 273k?
A. 39.03 B. 46.81 C. 53.18 D. 67.69 E. 76.92 Correct Answer: Option C – 53.18
What is the molar mass of the compound below?
A. 45 B. 61 C. 122 D. 123 E. 244 Correct Answer: Option C – 122
In the electrolysis of dilute tetraoxosulphate (VI) acid using platinum electrodes, the products obtained at the anode are cathode respectively are
A. hydrogen, oxygen B. Hydrogen, tetraoxosulphate (VI) ion C. oxygen, hydrogen D. sulphur, hydrogen E. sulphur, oxygen Correct Answer: Option C – oxygen, hydrogenProducts
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