A. 90% CaC2 + 10% CaCl2
B. Coconut charcoal
C. Soda lime + potash solution
D. 90% CaCO3 + 10% urea
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
Which of the following is not a peroxy acid
Calorific value of producer gas is low because of