MCQ
Which of them are Non $-$ biodegradable waste?
  • A
    Synthetic fibers.
  • B
    Pen refills.
  • C
    Silver foil.
  • All of above.

Answer

Correct option: D.
All of above.
The waste materials which cannot be broken down into non $-$ poisonous or harmless substances in nature are called non $-$ biodegradable waste.
Examples are plastics, polythene bags, ball $-$ point pen refills, synthetic fibres, and glass objects, metal articles like aluminium cans, iron nails, silver foil and radioactive wastes.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

If enthalpies of formation of ${C_2}{H_4}(g),\,C{O_2}(g)$ and ${H_2}O(l)$ at ${25\,^o}C$ and $1\,atm$ pressure be $ 52, -394 $ and $ - 286\,kJ\,mo{l^{ - 1}}$ respectively, the enthalpy of combustion of ${C_2}{H_4}(g)$ will be.....$kJ\,mo{l^{ - 1}}$
Rearrange the following ($I $ to $IV $)  in the order of increasing masses and choose the correct answer (Atomic mass: $N=14, O=16, Cu=63$).

$I.$ $1$ molecule of oxygen

$II.$ $1$ atom of nitrogen

$III.$ $1 \times {10^{ - 10}}$ $g$ molecular weight of oxygen

$IV.$ $1 \times {10^{ - 10}}$ $g$ atomic weight of copper

Match List $I$ with List $II$

List-$I$ (Elements) List-$II$(Properties in their respective groups)
$A$ $\mathrm{Cl}, \mathrm{S}$ $I$ Elements with highest electronegativity
$B$ $\mathrm{Ge}, \mathrm{As}$ $II$ Elements with largest atomic size
$C$ $\mathrm{Fr}, \mathrm{Ra}$ $III$ Elements which show properties of both metals and non metal
$D$ $\mathrm{F}, \mathrm{O}$ $IV$ Elements with highest negative electron gain enthalpy

Choose the correct answer from the options given below :

The condition for a stable wave is
Tritium is the isotope of
The compound that has the largest $H - M - H$ bond angle $( M = N , O , S , C ),$ is :
${{H}_{2}}\overset{14}{\mathop{C}}\,=CH-C{{H}_{3}}\xrightarrow[ or\,high\text{ }temp]{low\text{ }conc \text{ }of\text{ }B{{r}_{2}}}(?)$

Product of the above reaction is

Which one of the following bonds has the highest average bond energy $(kcal/mol)$
The third ionization enthalpy is minimum for
Aluminium vessels should not be washed with materials containing washing soda since