19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following ions is the most stable ?
Value of x in potash alum, K₂SO₄.Alx (SO₄)₃ . 24H₂O is (CPMT 2007)
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 …
Which amont the following is not a borane? (AMU 2009)
In which of the following the inert pair effect is most prominent ?
Which of the following does not show electrical conduction? (AIPMT 1999)
The stability of +1 oxidation state increases in the sequence (AIPMT 2009)
Which one of the following oxides is neutral ?
Which of the following does not depict properties of fullerenes ?
Identify the incorrect statement.
All members of group 14 when heated in oxygen form oxides. Which of the following is the correct trend of oxides ?
In graphite, C atom is in .......... state.
Which of the following is not true about structure of diamond and graphite ?
Match the column I with column II and mark the appropriate choice. Column I Column II (A) Coal gas (i) CO + H₂ (B) Synthesis gas (ii) CH₄ (C) Producer gas (iii) H₂ + CH₄ + CO (D) Natural gas (iv) CO + N₂
Aluminium chloride exists as dimer, Al₂Cl₆ in solid state as well as in solution of non-polar solvents such as benzene. When dissolved in water, it gives
Which of the following is not a use of graphite ?
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…
Carbon shows a maximum covalency of four whereas other members can expand their covalence due to
The purest form of coal is
Alumina is:
Catenation i.e., linking of similar atoms depends on size and electronic configuration of atoms. The tendency of catenation in Group 14 elements follows the order
Identify the wrong example from the following for the group 14 elements.
Alumina is:
Graphite is soft while diamond is hard because
In graphite, the layers of carbon atoms are held by