Tema
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
Q:
In chemistry labs, broken glass CANNOT go into the normal trash bins. (True or False)
True
False
Q:
There are several ways to calculate the enthalpy of a reaction, \( \Delta H_{r x n} \). Three methods were involved in
the enthalpy lab. In the method of \( \Delta H_{r x n}=-q_{s o l n} \), the [Select]
used. In the method of Hess's law, [Select]
theoretical prediction as if under the standard conditions, [Select]
is used.
Q:
3. 2.17 paveiksle pavaizduotas aušinamo švino
temperatūros kitimo grafikas.
a) Kokią agregatinę būseną atitinka jo dalys
\( A B, B C \) ir \( C D \) ?
b) Kokius vyksmus vaizduoja kiekviena grafi-
ko atkarpa?
c) Kaip vadinamas pavaizduotas virsmas ir
kiek jis truko?
d) Nustatykite švino lydymosi temperatūrą.
Q:
How many moles are in 29.5 grams of Na?
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