Which specie has unpaired electrons in antibonding molecular orbitals_______________?
A. O2+2 B. N2-2 C. B2 D. O2-2
Chemistry MCQs
For a given process the heat changes at constant pressure (qp) and at constant volume (qv) are related to each other as___________________?
A. qp = qv B. qp < qv C. qp > qv D. qp = qv / 2
Solubility product of AgCl is 2.0 x 10-10 mol2 dm-6. Maximum Concentration of Ag+1 ions in the solution is__________________?
A. 2.0 x 10-10 mol dm-3 B. 1.414 x 10-5 mol dm-3 C. 1.0 x 10-10 mol dm-3 D. 1.0 x 10-5 mol dm-3
Which of the following solution has the highest boiling point ?
A. 5.85% NaCl Solution B. 18.0 % glucose solution C. 6.0 % urea solution D. All have same boiling point
Which of the following can be used in laptops ?
A. Silver oxide battery B. Fuel cell C. Nickel cadmium cell D. Lead accumulator
Which is the unit of (K) rate constant for zero order reaction ?
A. s-1 B. mol dm-3 s-1 C. mol-1 dm3 s-1 D. mol-2 dm6 s-1
Which is carnalite________________?
A. KCI B. NaCI C. KCI MgCl2 6H2O D. Na2CO3. 10H2O
The most reactive allotropic form of phosphorus is________________?
A. White B. Redox potential C. Black D. Violet
Which molecule has the highest bond energy among the halogens_________________?
A. Fluorine B. Chlorine C. Iodine D. Bromine
The most paramagnetic element is____________________?
A. Iron B. Cobalt C. Chromium D. Manganese