The p-Block Elements questions
1863 published questions with worked solutions.
- Bond dissociation energy of "E-H" bond of the "H_2E" hydrides of group 16 elements (given below), follows order. A. O B. S C. Se...
- Formation of photochemical smog involves the following reaction in which A, B and C are respectively. (i) NO_2 h A + B (ii) B +...
- The Lewis acid character of boron tri halides follows the order
- Identify X, Y and Z in the following reaction. (Equation not balanced) ClO^ +NO_2 X H_2O Y+Z
- The oxidation state of phosphorus in hypophosphoric acid is + ____________.
- STATEMENT-1 : Boron always forms covalent bond. because STATEMENT-2 : The small size of B^ 3+ favours formation of covalent bond.
- STATEMENT-1 : In water, orthoboric acid behaves as a weak monobasic acid. because STATEMENT-2 : In water, orthoboric acid acts as...
- The reaction of P_4 with X leads selectively to P_4O_6 . The X is
- The heating of NH_4NO_2 at 60–70 °C and NH_4NO_3 at 200–250 °C is associated with the formation of nitrogen containing compounds...
- KO_2 (potassium super oxide) is used in oxygen cylinders in space and submarines because it
- In XeF_2, XeF_4, XeF_6 the numebr of lone pairs of Xe are respectively
- In case of nitrogen, NCl_3 is possible but not NCl_5 while in case of phosphorous, PCl_3 as well as PCl_5 are possible. It is due...
- Number of sigma bonds in P_4O_ 10 is
- Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anomalous behaviour is that graphite
- What may be expected to happen when phosphine gas is mixed with chlorine gas?
- Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that
- To neutralize completely 20 mL of 0.1M aqueous solution of phosphorous acid (H_3PO_3), the volume of 0.1M aqueous KOH solution...
- Among Al_2O_3, SiO_2, P_2O_3 and SO_2 the correct order of acid strength is
- Which among the following factors is the most important in making fluorine the strongest oxidizing halogen?
- Which one the following statement regarding helium is incorrect?
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