For the first question:
Valuable ore deposits and gem crystals are often associated
with igneous intrusions. So for this question the correct option is option “d”.
An example like the Pegmatite’s, which are a form of igneous intrusions, is
responsible for the creation of variety of gems like topaz and tourmaline.
For the second question:
For this specific question, option “c” seems to be the
correct option. Weathering, deposition, compaction, cementation are the
possible sequence that leads to the formation of sedimentary rocks.
Answer:

Explanation:
I am assuming you are saying what is the final volume of the gas
Known :
Initial volume (V1) = V
Initial temperature (T1) = T
Final temperature (T2) = 5/4 T
Initial pressure (P1) = P
Final pressure (P2) = 2P
<u>Wanted: Final volume (V2)</u>
<u />
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<span>During aerobic respiration, electrons travel downhill in which sequence?
</span><span>B) food → NADH → electron transport chain → oxygen</span>
Answer:
236.76 J
Explanation:
Parameters given:
Mass of sample, m = 6.50 g
Initial temperature, 
Final temperature, 
Specific heat capacity of gold, 
Heat of a substance is related to specific heat capacity by the formula:


236.76 J of heat is required to raise the temperature of the sample.
Answer:
H2SO4 + 2NaOH ==> Na2SO4 + 2H2O
Explanation: