A. Ammonia is used as refrigerant
B. A mixture of Ca(CN)2 and C is known as nitrolim
C. A mixture of Ca(H2PO4)2 and CaSO4.2H2O is known as superphosphate of lime
D. Hydrolysis of NCI3 gives NH3 and HOCl
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 of the following is not correct
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 :
The chemical formula of feldspar is
The formula of the product formed, when sodium thiosulphate solution is added to silver bromide is<br>
The following are some statements related to VA group hydrides,<br>I . Reducing property increases from NH<sub>3</sub> to BiH<sub>3</sub>.<br>II..Tendency to donate lone pair decreases from NH<sub>3</sub> to BiH<sub>3</sub><br>III.Thermal stability of hydrides decreases from NH3 to BiH3.<br>IV. Bond angle of hydrides decreases from NH<sub>3</sub> to BiH<sub>3</sub>.<br>The correct statements are<br>
Which one of the following noble gases is used in miner's cap lamps