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 \( \mathrm{Kg} / \mathrm{m}^{3} \)

X. (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) \( \mathrm{CHBr}_{3} \)

\( \mathrm{X}_{2}\left(\mathrm{SO}_{4}\right)_{3} \) Weak base 1- Mention two different methods to dissolve the ppt. (A). 2- Find the mass of ppt. (A) + solution (B) which is produced from 26 g of \( \left.\mathrm{X}_{2}\left(\mathrm{NO}_{3}\right)_{2}\right)_{2} \).

(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) \( \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{C} \equiv \mathrm{CCH}_{2} \mathrm{CH}_{3} \) (v) \( \mathrm{CHBr}_{3} \)

Write the systematic name for \( \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{C} \equiv \mathrm{CCH}_{2} \mathrm{CH}_{3} \)

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