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MCQs4All - Chemistry MCQs for NTS, FPSC, CSS, IELTS, TOEFL

Question. Nitrates of which pair gives different products on thermal decomposition___________________?
  1. Na K
  2. Mg Ca
  3. Li Na
  4. Li Ca
Question. Nylon is obtained by heating___________________?
  1. Acrylic acid
  2. Epichlorohydrin
  3. Vinyl chloride
  4. Adipic acid with hexamethylene diamine
Question. Centrifugal forces are balanced in atom by__________________?
  1. Attractive forces
  2. Repulsive force
  3. Electrons
  4. Neutrons
Question. 18g glucose is dissolved in 90g water the relative lowering in vapour pressure is equal to ___________________?
  1. 8
  2. 5.1
  3. 6
  4. one/fifty one
Question. 2nd orbit is ___________ away from nucleus of H-atom as compared to 1st orbit is ?
  1. 2-times
  2. 3-times
  3. 4-times
  4. 6 times
Question. In CCI4 I2 shows________________?
  1. Red colour
  2. Purple colour
  3. Blue colour
  4. Yellow colour

Chemistry MCQs for NTS, FPSC, CSS, PPSC, PMS, UTS, FTS, OTS, Teaching, CT, PTC, SST, B.Ed, M.Ed of past papers
Question. The number of formula units in 29.25g of common salt_________________?
  1. 6.022 x 1023
  2. 3.01 x 1023
  3. 2 x NA
  4. 4 x 6.022 x 1023
Question. 95% ethanol is called_________________?
  1. methylated spirit
  2. wood spirit
  3. rectified spirit
  4. absolute alcohol
Question. First ionization potential of alkaline earth metal is greater than alkali metals because___________________?
  1. They are more reactive
  2. They have greater atomic radii
  3. They have smaller atomic sizes
  4. All
Question. The diffusion of gases at absolute zero will be________________?
  1. Unchanged
  2. Slightly decreased
  3. Slightly increased
  4. Zero
Question. Clemmensens reduction infolves the reduction of___________________?
  1. ketone
  2. aldehyde
  3. alkane
  4. all of the above
Question. The yellow colour in photochemical smog is due to presence of__________________?
  1. dinitrogen oxide
  2. nitrogen dioxide
  3. chlorine gas
  4. chlorine dioxide
Question. Enzynies that catalyze the transfer of groups within molecule are called_________________?
  1. Isomerases
  2. Lyases
  3. Transferases
  4. Ligases
Important MCQs
Question: National Fish of Pakistan is ____________?
Question: ______________ is used for measuring velocity?
Question: Oxygen accounts for ____ % of totals human body mass?
Question: Nikola Tesla was born in
Question: International Monetary Fund formal existence came into being in
Question: The term internal salt refers to_____________________?
Question: Third largest continent of world in terms of area is
Question: The Boston Tea Incident took place in:
Question: Kashmir sold to Gulab Singh in
Question: The full marathon has an official distance of ________ kilometers?
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