Electrometallurgy

Q. 30. For the reaction, 1g mole of CaCO, is enclosed in 5L container CaCO3(s)--→ CaO(s) + CO2(g) Kp= 0.16 at 1073K then %rcent dissociation of CaCO3 is (1) Zero (3) 65% (4) 6.58%

Q.

Which of the following is affected by water?

1. Tin

2. Silicon

3. Germanium

4. Carbon

Q. 43.Calculate th amt of co2 that could be produced when (1) 1 mol of carbon is burnt in air (2) 1 mol of carbon is burnt in 16g of dioxygen (3) 2 mol of carbon are burnt in 16g if dioxygen

Q. reaction CaCO3(s) CaO(s) +CO2(g)(Kc= 0.5 molL-1), the maximum moles of CO2(g)formed at equlibrium in 5 L container is

Q. The drain cleaner, Drainex contains small bits of Aluminium which react with caustic soda to produce dihydrogen. What volume of dihydrogen at 20 degree C and one bar will be released when 0.15 g of Aluminium reacts ?

Q. What is the correct order of reactivity of halides with magnesium?

1. $R-Cl>R-Br>R-I$
2. $R-Br>R-Cl>R-I$
3. $R-I>R-Br>R-Cl$
4. $R-I=R-Br=R-Cl$

Q. In general, electrolytic refining method contains the pure metal as the anode

1. True
2. False

Q. How many grams of calcium oxide is obtained on heating 100 g of CaCO3?

Q.

In the ore Bauxite $A{l}_2{O}_3.2H_{2}O$ there are two significant types – Red Bauxite and White Bauxite. Bayer’s process is applicable for __ Bauxite.