19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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 ?
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 ?
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
The hardest substance is
Sindoor is represented by
Which of the following oxides can act as a reducing agent ?
Which one of the following oxides is neutral ?
Identify the wrong example from the following for the group 14 elements.
All members of group 14 when heated in oxygen form oxides. Which of the following is the correct trend of oxides ?
An element of group 14 forms two oxides one of which is highly poisonous and neutral. Other oxide can be easily liquefied and compressed to give a solid which is used as a refrigerant under the name of drikold. The el…
There is a large number of carbon compounds due to
Maximum ability of catenation is shown by
Alumina is:
Alumina is:
When alumina is heated with carbon in nitrogen atmo- sphere, the products are:
Which of the following will be formed, if we heat an aqueous solution of AlCl3 to dryness ?
Heating an aqueous solution of aluminium chloride to dryness will give
Alumina may be converted into anhydrous aluminium chloride by:
The incorrect statement regarding above reactions is: