Chemistry Question Bank

Product of the following reaction is Al C D O -> (PMT 2008)

White lead is (CPMT 2007)

Supercritical CO2 is used as (AIIMS 2007)

Litharge is chemically (AIIMS 2007)

For which one of the following minerals, the composition given is incorrect? (Kerala CEE 2007)

In borax bead test which compound is formed? (Punjab PMET 2007)

Value of x in potash alum, K2SO4.Alx (SO4)3 . 24H2O is (CPMT 2007)

Which glass will not crack when temperature changes ? (DUMET 2006)

The number of isomers possible for disubstituted borazine, B3N3H4X2 is: (AIPMT 2006)

CO2 is not a poisonous gas but there is increase in concentration of CO2 in the atmosphere due to burning of fossil fuels and decompostion of limestone. The increase in concentration of CO2 may lead to

Which of the following is not true about structure of carbon dioxide ?

Which is not a method of preparing carbon monoxide on a commercial scale ? (a) 473 1273 K (s) (g) (g) 2(g) C H O CO H - + ¾¾¾¾¾® + (b) 1273 K (s) 2(g) 2(g) (g) 2(g) 2C O 4N 2CO 4N + + ¾¾¾® + (c) (g) (s) 2(g) 2C O 2CO …

Match the column I with column II and mark the appropriate choice. Column I Column II

Which of the following is not a use of graphite ?

Which of the following is not true about structure of diamond and graphite ?

Identify the incorrect statement.

The most stable form of carbon at high temperature is X. The C – C bond length in diamond is Y while C – C bond length in graphite is Z. What are X, Y and Z respectively ?

The members of group 14 form tetrahalides of the type MX4. Which of the following halides cannot be readily hydrolysed by water ?

Carbon shows a maximum covalency of four whereas other members can expand their covalence due to

The purest form of coal is

What is the number of free electrons present on each carbon atom in graphite ?

In graphite, the layers of carbon atoms are held by

In graphite, C atom is in .......... state.

Which of the following does not depict properties of fullerenes ?

Buckminsterfullerence is