The PH of the 1.3 × 10-4 NH4Cl is__________?
The PH of the 1.3 × 10-4 NH4Cl is__________?
A. 1.3
B. 4.0
C. 2.886
D. 3.886
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The maximum number of orbitals present in a subshell that is represented by Azimuthal quantum number = 3 will be________________?A. 1
B. 3
C. 5
D. 7Addition of CH3COOH and CH3COONa gives in water_______________?
Addition of CH3COOH and CH3COONa gives in water_______________?A. Standard solution
B. buffer solution
C. acidic buffer solution
D. both B & CThe earth absorb radiation in Visible range but emit radiation at the same rate in the:
The earth absorb radiation in Visible range but emit radiation at the same rate in the:A. Ultra voilet
B. Gamma rays
C. Infrared
D. All of theseWhich of the following technique is simple and efficient to purify a substance____________________?
Which of the following technique is simple and efficient to purify a substance____________________?A. Filtration
B. Sublimation
C. Crystallization
D. Solvent extractionThe oxidation state of transition elements is usually _______________________?
The oxidation state of transition elements is usually _______________________?A. variable
B. constant
C. single
D. infinitePollutants have adverse effect over_________________?
Pollutants have adverse effect over_________________?A. Biosphere
B. Ecosystem
C. Both a & b
D. Hydrosphere