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. Which one of the following is not a periodic property ?
- Melting point of elements
- Boiling point of elements
- Ionization energy of elements
- Coordination number of ions
Question. When enthalpy of reactants is higher than product then reaction will be_________________?
Question. Which statement is wrong ?
- the amount of ozone layer is greater in the region close to the equator
- ozone acts as filter for UV radiations
- in the equatorial region it acts as pollutant
- CFCs play effective role in removing O3 in the stratosphere
Question. By the addition of base in waterpH will be_______________?
- more than 7
- less than 7
- equal to 7
- no effect
Question. Nitrates of which pair gives different products on thermal decomposition___________________?
- Na K
- Mg Ca
- Li Na
- Li Ca
Question. Nylon is obtained by heating___________________?
- Acrylic acid
- Vinyl chloride
- Adipic acid with hexamethylene diamine
Question. Centrifugal forces are balanced in atom by__________________?
- Attractive forces
- Repulsive force
Question. 18g glucose is dissolved in 90g water the relative lowering in vapour pressure is equal to ___________________?
- one/fifty one
Question. Which of the following can be used in laptops ?
- Silver oxide battery
- Fuel cell
- Nickel cadmium cell
- Lead accumulator
Question. 2nd orbit is ___________ away from nucleus of H-atom as compared to 1st orbit is ?
- 6 times
Question. In CCI4 I2 shows________________?
- Red colour
- Purple colour
- Blue colour
- Yellow colour
Question. The number of formula units in 29.25g of common salt_________________?
- 6.022 x 1023
- 3.01 x 1023
- 2 x NA
- 4 x 6.022 x 1023
Question. 95% ethanol is called_________________?
- methylated spirit
- wood spirit
- rectified spirit
- absolute alcohol