MCQs4All - Chemistry Collection
Chemistry MCQs for NTS, FPSC, CSS, PPSC, PMS, UTS, FTS, OTS, Teaching, CT, PTC, SST, B.Ed, M.Ed of past papers
Question. 1 mole of electron has mass in microgram_________________?
- 1.008 x 10-3
- 5.5 x 10-4
- 1.84 x 10-4
- 1.673 x 10-3
Question. Isomorphic substances have _______________?
- Same physical and chemical properties
- Same physical and different chemical properties
- Different physical and same chemical properties
- Different physical and chemical properties
Question. Which of the following molecule is polar__________________?
- none of the above
Question. For 3rd order reaction the hhalf life is inversely proportional to initial concentration of reactants__________________?
- Raise to power four
Question. The geometry of ammonia is___________________?
- Square planner
- Trigonal bipyramidal
- Trigonal Pyramidal
Question. Enthalpy of a reaction can be measured by ____________________?
- glass calorimeter
Question. The type of filtering media used for filtration depending upon____________________?
- Nature of reactants
- Nature of crucible
- Nature of product
- Nature of precipitate
Question. Benzene is heated in air with V2O5 at 450°C it undergoes________________?
- Substitution reaction
- Addition reaction
- Elimination reaction
- Oxidation reaction
Question. Allotropic form of phosphorus that is poisonous is___________________?
Question. Pressure in gas discharge tube was kept________________?
- 10 torr
- 1 torr
- 0.1 torr
- 0.01 torr
Question. Which one of the following methods will not give benzene ?
- Heating sod. Salt of Benzoic acid with soda lime
- Distilling phenol with Zn dust
- Chlorobenzene with NaOH at 360°C & 150atm.
- Hydrolysis of benzene sulphonic acid with super heated steam
Question. Because of its ability to combine with both oxygen and nitrogen aluminium metal is used_____________?
- As nitrometer
- To remove air bubbles from molten metal
- To produce alloy
- As insulator
Question. Solution having the property of a very little change in pH on adding a small amount of strong acid or base is called________________?
- buffer solution
- normal solution
- standard solution
- neutral solution