1
AP EAPCET 2022 - 5th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

The two major constituents of Portland cement are

A
$$\mathrm{CaO}, \mathrm{SiO}_2$$
B
$$\mathrm{CaO}, \mathrm{Al}_2 \mathrm{O}_3$$
C
$$\mathrm{SiO}_2, \mathrm{MgO}$$
D
$$\mathrm{CaO}, \mathrm{MgO}$$
2
AP EAPCET 2021 - 19th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

A compound A is used in paints instead of salts of lead. Compound A is obtained when a white compound B is strongly heated. Compound B is insoluble in water but dissolves in NaOH solution forming a solution of compound C. The compound A on heating with coke gives a volatile metal D and a gas E which burns with a blue flame. Identify the possible species D and C can be respectively?

A
D = Hg, C = Hg(O{H)$$_2$$
B
D = Cd, C = Na$$_2$$(CdO$$_2$$)
C
D = Zn, C = Na$$_2$$ZnO$$_2$$
D
D = Zn, C = Zn(OH)$$_2$$
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