1
IIT-JEE 1994
Fill in the Blanks
+1
-0
The compound YBa2Cu3O7, which shows superconductivity, has copper in oxidation state ______ assume that the rare earth element yttrium is in its usual +3 oxidation state.
2
IIT-JEE 1991
Fill in the Blanks
+1
-0
The weight of $$1 \times 10^{22}$$ molecules of CuSO4.5H2O is ____.
3
IIT-JEE 1983
Fill in the Blanks
+1
-0
3 g of a salt of molecular weight 30 is dissolved in 250 g of water. The molality if the solution is _____.
4
IIT-JEE 1980
Fill in the Blanks
+1
-0
The modern atomic unit is based on the mass of ______.
JEE Advanced Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
CBSE
Class 12