The p-Block Elements questions
1863 published questions with worked solutions.
- Phosphate rock is represented as Ca_ 10 (PO_4)_xCl_2, what is the value of x?
- What is the basicity of oxyacid of phosphorus with oxidation number +5?
- What is the maximum oxidation state of nitrogen in its compounds?
- In the ring test of NO_3^-, the following complex appears as a ring: [Fe(H_2O)_5NO]^ 2+ . What is the oxidation state of Fe?
- Which set of elements is called chalcogens?
- Which of the elements listed below shows allotropic forms?
- Antimony occurs mainly in the form of:
- Boron is found in the form of:
- Chalcogens are:
- One of the fertilizer is:
- Gold when dissolved in aqua-regia gives:
- Which element occurs freely in nature?
- Red phosphorus can be obtained from white phosphorus by
- The reaction of P_4 with X leads selectively to P_4O_6; X is
- In the electrothermal process, the compound displaced by silica from calcium phosphate is
- The treatment of Cu with dilute HNO_3 gives
- For H_3PO_3 and H_3PO_4, the correct choice is [IIT JEE 2003]
- When heated, NH_3 passed over hot CuO gives a gas evolved, which is
- The least thermally stable hydride of the group 15 elements is
- How many bonding electron pairs are there in white phosphorus?
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