Animal charcoal adsorbs the coloured_________________?
Animal charcoal adsorbs the coloured_________________?
A. impurities
B. crystals
C. solvents
D. both A & B
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Which is true about Zn-Cu galvanic cell ?
Which is true about Zn-Cu galvanic cell ?A. Reduction occurs at anode
B. K+ ion transfer from salt bridge to left beaker of ZnSO4
C. Oxidation occurs at cathode
D. Anode is negatively chargedThe molecules of which gas have highest speed?
The molecules of which gas have highest speed?A. H2 at -73oC
B. CH4 at 300 K
C. N2 at 1,027oC
D. O2 at 0oCRutherfords planet like structure was defective and unsatisfactory because_________________?
Rutherfords planet like structure was defective and unsatisfactory because_________________?A. Moving e- accelerate towards the nucleus
B. Continuous spectrum
C. behavior of electron remain unexplained
D. allWhen sparingly soluble salt is in equilibrium with molar concentration of its oppositely charged ion when the product is called_________________?
When sparingly soluble salt is in equilibrium with molar concentration of its oppositely charged ion when the product is called_________________?A. common ion effect
B. solubility product
C. dissociation constant
D. dissociation constant for an acidPfund series are produced in the spectrum of hydrogen atom__________________?
Pfund series are produced in the spectrum of hydrogen atom__________________?A. when electrons jump down to 2nd- orbit
B. when electrons jump down to 3rd- orbit
C. when electrons jump down to 4th- orbit
D. when electrons jump down to 5th- orbitIf a buffer solution of higher pH than seven is to be made we use___________________?
If a buffer solution of higher pH than seven is to be made we use___________________?A. Strong acid and strong base
B. Weak acid and strong base
C. Weak acid and strong base
D. Weak acid and its salt with strong base