A major factor considered in selecting a suitable method for preparing a simple salt is its
crystalline form
melting point
reactivity with dilute acids
solubility in water
Correct answer is D
No explanation has been provided for this answer.
The gas given off when NH4 Cl is heated with an alkali is
H2
Cl2
N2
NH3
Correct answer is D
No explanation has been provided for this answer.
123g
139g
155g
182g
Correct answer is D
S + O\(_2\) → SO\(_2\).
According to the equation 32g of O\(_2\) produced 64g of SO\(_2\)
therefore 91g of O2 will produce yg of SO2
y = \(\frac{91 * 64}{32}\)
y = 182g of SO\(_2\)
1.80g
3.55g
7.10g
15.50g
Correct answer is B
1 mole Cl\(_2\) occupy 22.4dm\(^3\)
i.e 2 x 35.5 → 22.4 ; x → 1. 12
:. x = \(\frac{1.12}{22.4}\) x 2 x 35.5 = 3.55
50cm3
150cm3
200cm3
300cm3
Correct answer is B
According to the equation 2NH3 → N3 + 3H2
2 x 22400cm3 of ammonia will produce
3 x 22400cm3 of hydrogen
If 100cm3 of NH3 is used.
:. H2 volume = \(\frac{100}{2x22400} x 3x22400
=150cm3