Which of the following is true? a Liquids are denser than gases b Liquids are less dense than gases c Liquids and gases are the same density d None of the above

(12.3) What is the major product of the reaction shown below? \( \mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}=\mathrm{CH}_{2}+\mathrm{H}_{2} \mathrm{O} \xrightarrow{\mathrm{H}^{+}} \)

Which of the following reactions doesn't represent redox reaction ? (a) \( 2 \mathrm{CO}_{(\mathrm{g})}+\mathrm{O}_{2(\mathrm{~g})} \longrightarrow 2 \mathrm{CO}_{2(\mathrm{~g})} \) (b) \( \mathrm{CaCO}_{3(\mathrm{~s})}+2 \mathrm{HCl}_{(\mathrm{aq})} \longrightarrow \mathrm{CaCl}_{2(\mathrm{aq})}+\mathrm{CO}_{2(\mathrm{~g})}+\mathrm{H}_{2} \mathrm{O}_{(\ell)} \) (c) \( \mathrm{Zn}_{(\mathrm{s})}+\mathrm{H}_{2} \mathrm{SO}_{4(\mathrm{aq})} \longrightarrow \mathrm{ZnSO}_{4(\mathrm{aq})}+\mathrm{H}_{2(\mathrm{~g})} \) (d) \( \mathrm{SO}_{2(\mathrm{~g})}+2 \mathrm{H}_{2} \mathrm{~S}_{(\mathrm{g})} \longrightarrow 3 \mathrm{~S}_{(\mathrm{s})}+2 \mathrm{H}_{2} \mathrm{O}_{(\ell)} \) a b c d

b) Write structural formulae for the following compounds (i) \( 2,3,3,4 \) - tetra methyl pent - 1 - ene (ii) Tetralodo methane (iii) 2,5, di methyl hexane (iv) Heptane (v) Pent- 2 - yne

iv). \( 20 \mathrm{~cm}^{3} \) of water off density \( 1 \mathrm{~g} / \mathrm{cm}^{3} \) is mixed with \( 30 \mathrm{~cm}^{3} \) of alcohol of density \( 0.8 \mathrm{~g} / \mathrm{cm}^{3} \) Find the density of the mixture in \( \mathrm{Kg} / \mathrm{m}^{3} \)

(a) Write the systematic names for the following: (i) \( \mathrm{CH}_{3} \mathrm{CH}\left(\mathrm{CH}_{3}\right)-\mathrm{CH}_{2}\left(\mathrm{CH}_{3}\right) \mathrm{CH}_{2} \mathrm{CH}_{3} \) (ii) \( \mathrm{CH}_{3} \mathrm{CH}\left(\mathrm{C}_{2} \mathrm{H}_{5}\right) \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{Cl} \) (iii) \( \mathrm{CH}_{3} \mathrm{C}\left(\mathrm{CH}_{3}\right)=\mathrm{CH}_{2} \) (iv) \( \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{C}=\mathrm{CCH}_{2} \mathrm{CH}_{3} \) (v) \( \mathrm{CHBr}_{3} \)