MCQ
Freon (dichlorodifluoro methane) is used
- AAs local anaesthetic
- BFor dissolving impurities in metallurgical process
- ✓In refrigerator
- DIn printing industry
✓
Answer
Correct option: C.
In refrigerator
c
(c) Freon $(CC{l_2}{F_2})$ is an odourless, non-corrosive, non toxic gas which is stable even at high temperatures and pressures. It has low b.Pt, low specific heat and can be easily liquified by applying pressure at room temperature. It is therefore, widely used in refrigerant (cooling agent) in refrigerators and air conditioners.
(c) Freon $(CC{l_2}{F_2})$ is an odourless, non-corrosive, non toxic gas which is stable even at high temperatures and pressures. It has low b.Pt, low specific heat and can be easily liquified by applying pressure at room temperature. It is therefore, widely used in refrigerant (cooling agent) in refrigerators and air conditioners.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The incorrect statement regarding conformations of ethane is:
If the $Z{n^{2 + }}/Zn$ electrode is diluted to $100$ times then the change in e.m.f.
→The rate of a first order reaction is $1.5 \times {10^{ - 2}}\;mol{L^{ - 1}}\;{\min ^{ - 1}}$ at $0.5\, M $ concentration of the reactant. The half life of the reaction is ....... $\min$
→Match List$-I$ with List$-II$:
→|
List$-I$ (Parameter) |
List$-II$ (Unit) |
| $(a)$ Cell constant | $(i)$ $\mathrm{S}\, \mathrm{cm}^{2} \,\mathrm{~mol}^{-1}$ |
| $(b)$ Molar conductivity | $(ii)$ Dimensionless |
| $(c)$ Conductivity | $(iii)$ $\mathrm{m}^{-1}$ |
| $(d)$ Degree of dissociation of electrolyte | $(iv)$ $\Omega^{-1} \,\mathrm{~m}^{-1}$ |
Choose the most appropriate answer from the options given below :
The following two reactions are known
→$Fe_2O_{3(s)} + 3CO_{(g)} \rightarrow 2Fe_{(s)} + 3CO_{2(g)};$ $\Delta H = - 26.8\, kJ$
$FeO_{(s)} + CO_{(g)} \rightarrow Fe_{(s)} + CO_{2(g)} \, ;$ $\Delta H = - 16.5\, kJ$
The value of $\Delta H$ for the following reaction
$Fe_2O_{3(s)} + CO_{(g)} \rightarrow 2FeO_{(s)} + CO_{2(g)}$ is ............. $\mathrm{kJ}$
Compound $(B)$ is
→Which of the following statements about the assembly of nucleotides in a molecule of deoxyribose nucleic acid $(DNA)$ is correct
→Example of aromatic amino acid is/are
Total number of isomers of ${C_6}{H_{14}}$ are
→The helical structure of proteins is established by