Topic
Q:
\( Br _ { 120 } + H _ { 20 } \rightarrow \)
Q:
What is the correct number of significant figures in the number
0.0025060 ?
Q:
Duna quantità pari a \( 3,8 \mathrm{~mol} \) di un gas perfetto biatomico
vene espansa a pressione costante \( p \). Il calore specifico a
pressione costante è uguale a \( 2,0 \times 10^{3} \mathrm{~J} /(\mathrm{kg} \cdot \mathrm{K}) \).
Calcola la massa di gas che viene espanso.
\( [55 \mathrm{~g}] \)
Q:
Which element is diamagnetic?
OF
F Li
Cd
Ob
Q:
Choose the ground state electron configuration for \( \mathrm{Ti}^{2+} \).
\( [\operatorname{Ar}] 4 s^{2} 3 d^{2} \)
\( [\operatorname{Ar}] 3 d^{4} \)
\( [\operatorname{Ar}] 4 s^{2} 3 d^{4} \)
\( [\operatorname{Ar}] 4 s^{2} \)
\( [\operatorname{Ar}] 3 d^{2} \)
Q:
b) Neutralization reaction is:
\( \begin{array}{ll}\text { (i) Precipitation reaction } & \text { (ii) Oxidation-Reduction Reaction } \\ \text { (iii) Complex formation reaction } & \text { (iv) Acid-base reaction }\end{array} \)
Q:
Which of the following electron configurations is IMPOSSIBLE?
\( 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{5} \)
\( 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} \)
\( 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{1} \)
\( 1 s^{2} 2 s^{4} 2 p^{6} 3 s^{2} 3 p^{3} \)
\( 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{3} \)
Q:
b) Neutralization reaction is:
\( \begin{array}{ll}\text { (i) Precipitation reaction } & \text { (ii) Oxidation-Reduction Reaction } \\ \text { (iii) Complex formation reaction } & \text { (iv) Acid-base reaction }\end{array} \)
Q:
Question 2: Select the correct answer for each of the following:
\( \begin{array}{llll}\text { a) Parts per million }(\mathrm{ppm}): \\ \begin{array}{llll}\text { (i) } \mathrm{mg} / \mathrm{L} & \text { (ii) } \mathrm{mg} / 100 \mathrm{ml} & \text { (iii) } \mathrm{Kg} / \mathrm{L} & \text { (iv) } \mathrm{ml} / \mathrm{g}\end{array}\end{array} \)
Q:
For the compound of \( \mathrm{Cu}_{x} \mathrm{Cl}_{y} \), there are 5.777 g Copper and 6.445 g Chlorine. What are the values of \( x \)
and \( y \) ?
2,2
2,1
01,1
1,2
2,4
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