19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Identify X in the reaction : (steam) X 2H O XO 2H D + ¾¾® +
Which one of the following anions is present in the chain structure silicates ? (a) Si O - (b) n (Si O ) - (c) n (SiO ) - (d) SiO - Ans. (c) Sol. There are two general formula of anions of chain silicates are n SiO - …
Which of the following ions is the most stable ?
Which of the following is not from 14 th group
The tendency of group 14 elements to show +2 oxidation state increases in the order of
The type of hybridisation of boron in diborane is (AIPMT 1999)
Which one of the following is not the characteristic property of carbon ?
Which of the following is not true about structure of carbon dioxide ?
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
Maximum ability of catenation is shown by
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 of the following acids cannot be stored in glass ?
There is a large number of carbon compounds due to
The members of group 14 form tetrahalides of the type MX4. Which of the following halides cannot be readily hydrolysed by water ?
In SiO , - the tetrahedral molecule, two oxygen atoms are shared in
Identify the wrong example from the following for the group 14 elements.
Aluminium (III) chloride forms a dimer because Aluminium (AIPMT 1995)
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 ?
Moderate electrical conductivity is shown by
Which of the following oxides can act as a reducing agent ?
Sindoor is represented by
Complex formation is more likely to be possible in _____
Which one of the following oxides is neutral ?
Which of the following does not depict properties of fullerenes ?
When excess of NaOH solution is added in potash alum, the product is: