1
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
Change Language
The mole fraction of ethanol in water is 0.08. Its molality is
A
6.32 mol kg-1
B
4.83 mol kg-1
C
3.82 mol kg-1
D
2.84 mol kg-1
2
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
Change Language
5 mL of 0.1 M Pb(NO3)2 is mixed with 10 mL of 0.02 M KI. The amount of PbI2 precipitated will be about
A
10-2 mol
B
10-4 mol
C
2 $$ \times $$ 10-4 mol
D
10-3 mol
3
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
Change Language
Which of the following has the largest number of atoms?
A
1 g of Ag
B
1 g of Fe
C
1 g of Cl2
D
1 g of Mg
4
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
Change Language
What will be the mass of one atom of 12C?
A
1 amu
B
1.9923 $$ \times $$ 10-23g
C
1.6603 $$ \times $$ 10-22g
D
6 amu
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