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Total Questions : 273 | Page
20
of 28 pages
Question 191.
A salt(s) and H₂(g) is produced if reactants are
an acid and oxide
an acid and a metal
an acid and base
an acid and a sodium hydrogen carbonate
See Solution
Discuss Question
Answer: Option B. ->
an acid and a metal
Answer:
(b).
an acid and a metal
Question 192.
In Na₂CO₃.10H₂O, percentage of Carbon is
0.4201
0.0422
0.042
0.46
See Solution
Discuss Question
Answer: Option C. ->
0.042
Answer:
(c).
0.042
Question 193.
Formula of Copper Hydroxide is
Cu(OH)₂
CuHOH
CuO₂
CuH₂O
See Solution
Discuss Question
Answer: Option A. ->
Cu(OH)₂
Answer:
(a).
Cu(OH)₂
Question 194.
Molar mass of Copper Oxide (Cu₂O) is
113.14g/mol
139.33g/mol
173.298g/mol
143.09g/mol
See Solution
Discuss Question
Answer: Option D. ->
143.09g/mol
Answer:
(d).
143.09g/mol
Question 195.
Consider reactants: HNO₃ and BaSO₃
reaction takes place in aquatic state
the reaction results in Barium nitrate
reaction results in barium nitrite
the reaction may not occur at all
See Solution
Discuss Question
Answer: Option D. ->
the reaction may not occur at all
Answer:
(d).
the reaction may not occur at all
Question 196.
Copper can have a charge of
2 or 4
4 or 6
3 or 5
2 or 1
See Solution
Discuss Question
Answer: Option D. ->
2 or 1
Answer:
(d).
2 or 1
Question 197.
In Na₂CO₃.10H₂O, after water, highest percentage composition is of
sodium
oxygen
carbon
hydrogen
See Solution
Discuss Question
Answer: Option B. ->
oxygen
Answer:
(b).
oxygen
Question 198.
Formula of Calcium Hydrogen Carbonate indicates
that the charge on Ca is +2
the charge on HCO₃ is −1
that for each molecule of calcium hydrogen carbonate, one ion of Ca and two ions of hydrogen carbona
all of these
See Solution
Discuss Question
Answer: Option D. ->
all of these
Answer:
(d).
all of these
Question 199.
Metal that burns even more brightly than Magnesium (Mg) is
zinc
mercury
zirconium
diamond
See Solution
Discuss Question
Answer: Option C. ->
zirconium
Answer:
(c).
zirconium
Question 200.
Valency of Ferrum can be
2 or 4
4 or 6
3 or 5
2 or 3
See Solution
Discuss Question
Answer: Option D. ->
2 or 3
Answer:
(d).
2 or 3
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