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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…
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
The shapes and hybridisation of BF3 and BH- respectively are
Which of the following is not from 14 th group
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
Identify X in the reaction : (steam) X 2H O XO 2H D + ¾¾® +
When excesss of carbon dioxide is passed through lime water, the milkiness first formed disappears due to
AlCl3 on hydrolysis gives:
Which one of the following is not the characteristic property of carbon ?
Graphite is soft while diamond is hard because
In the purification of bauxite by Hall’s process:
AIF3 is soluble in HF only in presence of KF. It is due to the formation of
When excess of NaOH solution is added in potash alum, the product is:
Complex formation is more likely to be possible in _____
Al2O3 formation from aluminium and oxygen involves evolution of a large quantity of heat, which makes alu- minium used in:
Aluminium vessels should not be washed with materials containing washing soda since :
Which one is the wrong statement ?
Alumina is:
Thermite is a mixture of iron oxide and
Which of the following is correct?
Reactivity of borazole is higher than that of benzene because:
What are X and Y in the reaction ? heat 3B H 6X 3[BH (X) ] [BH ] Y 12H + - + ® ¾¾¾® +
Diborane reacts with ammonia under different conditions to give a variety of products. Which one among the following is not fomed in these conditions?