Chemistry a level oct nov 2010 paper1

[chaizx]

36 Element X is a solid. It occurs as a contaminant of carbonaceous fuels.
Its oxide Y is formed in car engines.
Further oxidation of Y to Z can occur in the atmosphere.
Which statements about Y and Z are correct?
1 Molecule Y has lone pairs of electrons.
2 The atmospheric oxidation of Y to Z is a catalysed reaction.
3 Y is a colourless gas.

What is X actually ? Is it a carbon ? Or is a sulphur?

Thanks in advance .

 

[Amy Bloom]

36 Element X is a solid. It occurs as a contaminant of carbonaceous fuels.
Its oxide Y is formed in car engines.
Further oxidation of Y to Z can occur in the atmosphere.
Which statements about Y and Z are correct?
1 Molecule Y has lone pairs of electrons.
2 The atmospheric oxidation of Y to Z is a catalysed reaction.
3 Y is a colourless gas.

What is X actually ? Is it a carbon ? Or is a sulphur?

Thanks in advance .

According to me X is sulfur coz it exists as a solid in nature. Its oxide is SO2 (Y) and is oxidised to SO3 (Z) which is an a colourless gas in the atmosphere.
So, according to me, statements 2 and 3 are correct. Is the answer correct?

 

[chaizx]

According to me X is sulfur coz it exists as a solid in nature. Its oxide is SO2 (Y) and is oxidised to SO3 (Z) which is an a colourless gas in the atmosphere.
So, according to me, statements 2 and 3 are correct. Is the answer correct?

The answer is 1,2 and 3. I think statement 1 should be correct also because sulphur dioxide has lone pairs of electrons.