In K2Cr2O7 the oxidation number of chromium is____________________?
In K2Cr2O7 the oxidation number of chromium is____________________?
A. 7
B. 6
C. -7
D. -6
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The property which increases upto group IV-A then decreases on wards_______________?
The property which increases upto group IV-A then decreases on wards_______________?A. Ionization energy
B. Atomic radii
C. Melting & boiling points
D. Atomic volumeWhich of the following option is incorrect about gases ?
Which of the following option is incorrect about gases ?A. All molecules move with same speed
B. All molecules behave independently
C. PV / RT = n
D. All gases cannot be liquefied through Linds MethodSafe and the most reliable method of drying crystals is through_________________?
Safe and the most reliable method of drying crystals is through_________________?A. Filter paper
B. Vacuum desiccators
C. Oven
D. None of theseWhich of following is not a base______________?
Which of following is not a base______________?A. KOH
B. NH3
C. PH3
D. BF3The metallurgical process in which a metal is obtained in a fused state is called__________?
The metallurgical process in which a metal is obtained in a fused state is called__________?A. smelting
B. roasting
C. calcinations
D. froth floatationSintered glass is a porous material used for ___________________?
Sintered glass is a porous material used for ___________________?A. absorption
B. adsorption
C. filtration
D. sublimation