1
JEE Main 2018 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
An aqueous solution contains 0.10 M H2S and 0.20 M HCl. If the equilibrium constants for the formation of HS from H2S is 1.0 $$\times$$ 10–7 and that of S2- from HS ions is 1.2 $$\times$$ 10–13 then the concentration of S2- ions in aqueous solution is :
A
5 $$\times$$ 10–19
B
5 $$\times$$ 10–8
C
3 $$\times$$ 10–20
D
6 $$\times$$ 10–21
2
JEE Main 2018 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following are Lewis acids?
A
BCl3 and AlCl3
B
PH3 and BCl3
C
AlCl3 and SiCl4
D
PH3 and SiCl4
3
JEE Main 2018 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following salts is the most basic in aqueous solution?
A
Pb(CH3COO)2
B
Al(CN)3
C
CH3COOK
D
FeCl3
4
JEE Main 2018 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
An alkali is titrated against an acid with methyl orange as indicator, which of the following is a correct combination?
A
Base Acid End point
Weak Strong Colourless to pink
B
Base Acid End point
Strong Strong Pinkish red to yellow
C
Base Acid End point
Weak Strong Yellow to pinkish red
D
Base Acid End point
Strong Strong Pink to colourless
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