A. Ar, Kr
B. Xe, Ar
C. He, Ne
D. Xe, Kr
Which of the following has S---S bond ?
The number of oxygen atoms bonded to one phosphorus atom in P<sub>4</sub>O<sub>6</sub> is:
Which of the following is not correct
Which of the following is not correct<br>
The molecular formula of potash alum is :
In Fischer-Ringe's method of separation of nobles gas mixture, from air is used
Observe the following statements regarding purification of bauxite<br>I. During Hall\'s process, silica is removed as Si (vapour)<br>II. Bauxite ore contaminated with Fe<sub>2</sub>O<sub>3</sub> is purified in Baeyer\'s process<br>III. During Serpeck's process, AlN is formed<br>The correct answer is
Which one of the following pairs of reactants does not form oxygen when they<br>react with each other
Bauxite is a mineral for the extraction of :