Which of the following technique is simple and efficient to purify a substance____________________?
Filtration Sublimation Crystallization Solvent extraction
Science
Hydrogen effuses four times more rapidly than volume of an unknown gas molar mass of unknown gas should be_______________?
16 gmol-1 32 gmol-1 48 gmol-1 64 gmol-1
The complete reduction carboxylic acid results in the formation of________________?
Alkyne Alkene Alkane Alcohol
The hydrolysis of Benzenetrizonide will yield three moles of____________________?
Glyoxime Benzaldehyde Glycol Glyoxal
Which of the following will be acidic_____________?
propyne 1-butyne ethyne all of the above
What is the order of kinetics in the SN1 mechanism ?
Zero First Second Third
Non-stoichiometric compounds of transition elements are
hydrates hydrides binary compounds interstitial compounds
Which set of solutes will form a buffer when dissolved in water to make 1 litter of solution ?
0.0002M HCI 0.2 mole of NaCI with 0.2 mole of HNO3 0.4 mole of CH3COOH with 0.4 mole of NaOH …
Solubility product of AgCl is 2.0 x 10-10 mol2 dm-6. Maximum Concentration of Ag+1 ions in the solution is__________________?
2.0 x 10-10 mol dm-3 1.414 x 10-5 mol dm-3 1.0 x 10-10 mol dm-3 1.0 x 10-5 mol dm-3
Which one of the following statement is not correct about benzene ?
On hydrogenation 208 KJ/mole is liberated C-H bond length in benzene is 1.09 A? Molecular mass of benzene is 78.108 …