An organic compound gave the following results on analysis: C = 29.3% ; H =…
An organic compound gave the following results on analysis: C = 29.3% ; H = 5.7%; Br =…
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Which element is the most electronegative?
Which element is the most electronegative? A. calcium B. fluorine C. iodine D. oxygen E. sodium Correct Answer:…
Which compound will give propane when it Is dehy drated by an excess of hot,…
Which compound will give propane when it Is dehy drated by an excess of hot, concentrated tetraoxosvlphate(VI) acid?…
Which formula is used to indicate the degree of acidity of an acid?
Which formula is used to indicate the degree of acidity of an acid? A. ( [H^+] = ^{text{mass…
What change will occur to the equilibrium mixture ( 2CrO^{2-}_4(aq) + 2H^+(aq) ⇔ Cr_2O^{2-}_7(aq) +…
What change will occur to the equilibrium mixture ( 2CrO^{2-}_4(aq) + 2H^+(aq) ⇔ Cr_2O^{2-}_7(aq) + H_2O(l) ) when…
Which is NOT a synthetic polymer?
Which is NOT a synthetic polymer? A. nylon B. Orion C. Perspex D. polystyrene E. wool Correct Answer:…
A calcium atom and a calcium ion have the same
A calcium atom and a calcium ion have the same A. chemical properties B. electric charge C. electronic…
The boiling point of water is higher than the boiling point of ethanol because
The boiling point of water is higher than the boiling point of ethanol because A. the bonding in…
The reaction C2H6 → C2H + H2 is known as
The reaction C2H6 → C2H + H2 is known as A. dehydration B. dehydrogenation C. displacement D. hydrogenation…
The number of hydrogen ions in 1.0dm6.00×103 of a 0.25 mole dm6.00×10-3 tetraoxosulphate(Vl) acid solution…
The number of hydrogen ions in 1.0dm6.00×103 of a 0.25 mole dm6.00×10-3 tetraoxosulphate(Vl) acid solution is [Avogadro constant…