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. C5H12 has the number of isomers ___________________?
  1. one
  2. two
  3. three
  4. four
Question. Which of the following reaction is not shown by ketones ?
  1. reaction with HCN
  2. reaction with NaHSO3
  3. reaction with 2 4 dinitrophenyl hydrazine
  4. reaction with Fehling solution
Question. The leements in which d or f orbitals are in the process of completion are__________________?
  1. outer transition elements
  2. inner transition elements
  3. typical transition elements
  4. transition elements
Question. Compounds having same molecular formula but differ in structural formula are called __________________?
  1. polymer
  2. monomer
  3. isomer
  4. allotropes
Question. An alcohol which can be prepared by fermentation is_________________?
  1. CH3OH
  2. C3H7OH
  3. CH3 – CH2 – OH
  4. C6H5OH
Question. A elements are named as alkali metals because_______________?
  1. Their oxides are basic
  2. Their oxide and hydroxides are water soluble
  3. Both A & B
  4. They are found in earth
Question. Which of the following air pollutants is more dangerous for ozone layer ?
  1. CFC
  2. CO2
  3. CO
  4. Oxides of nitrogen
Question. Which of the halogen has highest electronegativity ?
  1. Fluorine
  2. Chlorine
  3. Bromine
  4. Iodine
Question. Among halogens the highest boiling point is of___________________?
  1. Flrorine
  2. Chlorine
  3. Bromine
  4. Iodine
Question. Which of the solid does not contain covalent bond__________________?
  1. copper
  2. ice
  3. diamond
  4. graphite
Question. The tip of funnel should touch the wall of the breaker in order to avoid____________________?
  1. Inconsistent flow of filtration
  2. splashing
  3. premature crystallization
  4. all of above
Question. Electrode potential of Zn is__________________?
  1. oxidation
  2. reduction
  3. oxidation-reduction
  4. depends on the nature of the coupled electrode
Question. Unit of Kc is_______________?
  1. moles2dm+6
  2. moles-2dm+6
  3. moles+2dm-6
  4. Kc may or may not have units