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JEE Main levelOne or more correct optionsDifficulty 2 of 3pb062

Which of the following statements about carbon dioxide are correct?

AThe molecule is linear and has zero dipole moment.
BBurning magnesium continues to burn in $CO X_{2}$ , giving $MgO$ and carbon.
CSolid $CO X_{2}$ (dry ice) sublimes at 1 atm without melting.
DIt is a neutral oxide like $CO$ .

Answer: A, B, C

Carbon is

s p

hybridised, so

CO X_{2}

is linear and the two bond dipoles cancel. Magnesium is a strong enough reducing agent to take oxygen:

2 Mg + CO X_{2} 2 MgO + C

. Solid

CO X_{2}

sublimes at about

- 7 8^{\circ} C

at 1 atm.

CO X_{2}

is acidic (it forms carbonic acid), so the last statement is wrong.

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