Describe the oxidizing action of potassium dichromate and write the ionic equations for its reaction with:
(i) iodide
(ii) iron(II) solution and
(iii) $\mathrm{H}_2 \mathrm{~S}$

What are the different oxidation states exhibited by the lanthanoids?

Write down the electronic configuration of:
(i) $\mathrm{Cr}^{3+}$ $\hspace{.5cm}$(iii) $\mathrm{Cu}^{+}$ $\hspace{.5cm}$(v) $\mathrm{Co}^3+$ $\hspace{.5cm}$(vii) $\mathrm{Mn}^{2+}$
(ii) $\mathrm{Pm}^{3+}$ $\hspace{.3cm}$(iv) $\mathrm{Ce}^{4+}$ $\hspace{.5cm}$(vi) $\mathrm{Lu}^{2+}$ $\hspace{.5cm}$(viii) $\mathrm{Th}^{4+}$

A student says that the graph of the function $g(x)=0.4 \cdot f(x)$ is a horizontal compression of the function $f$ . Explain the error the student made.

a. Listing What are the general characteristics of solids? b. Comparing and Contrasting How do crystalline solids differ from amorphous solids? c. Drawing Conclusions A glass blower can bend and shape a piece of glass that has been heated. Is glass a crystalline or an amorphous solid? Explain.

Tu es en train de pecher et tu entends des morceaux (pieces) de conversations des personnes autour de (around) toi. Compl$\`{e}$te chaque conversation avec les mots de la boite qui conviennent.

$$\begin{array}{|lll|} \hline \text { bientot } & \text { prochain(e) } & \text { tout $\`{a}$ l'heure } \\ \text { apr$\`{e}$s-demain } & \text { la prochaine fois } & \text { demain } \\ \hline \end{array}$$

la femme Tu vois, on est arrivés trop tard. Il y a déj$\`{a}$ trop de gens et on ne va jamais attraper de poissons.

le mari $T_s \mathrm{u}$ as raison ma chérie. $\rule{2cm}{0.2pt}$on doit se lever plus tot.

What is the potential difference across a 10 mH inductor if the current through the inductor drops from 150 mA to 50 mA in $10 \mu \mathrm{s}$? What is the direction of this potential difference? That is, does the potential increase or decrease along the direction of the current?

Assign a binary code in some orderly manner to the 52 playing cards. Use the minimum number of bits.

Consider $985,23x$ and $6$. Determine all possible digit replacements for $x$ so that the first number is divisible by the second.

Answer the exercise given below.

If $\cos t=-\frac{8}{17}$ and if the terminal point determined by $t$ is in quadrant III, find $\tan t \cot t+\csc t$

The brigantine was sailing at full speed and was 30 miles at sea when Lord Nelson began to give chase at twice the speed of the brigantine. If Nelson caught up in 6 hours, how fast was the brigantine traveling? Begin by drawing a diagram of distances traveled and writing the distance equation.

What kind of hybrid orbitals would we expect the central atom to use for bonding in (a) $\mathrm{PCl_3}$ and (b) $\mathrm{BrCl_3}$?

A heavy steel cable attached to a motor is lifting a girder. The girder is speeding up.

When resistors 1 and 2 are connected in series, the equivalent resistance is

$$20.0 \Omega$$

. When they are connected in parallel, the equivalent resistance is

$$3.75 \Omega$$

. What are (a) the smaller resistance and (b) the larger resistance of these two resistors?