Copper pyrite, the chief ore of copper, is
Copper pyrite, the chief ore of copper, is
Options
(a) CuFeS₂ (b) Cu₂S (c) CuCO₃.Cu(OH)₂ (d) Cu₂O
Correct Answer:
CuFeS₂
Explanation:
CuFeS₂ is copper pyrite. It is the chief ore of copper. world’s […]
Chemistry
Which one of the following is a false statement
Which one of the following is a false statement
Options
(a) Cell fluid is an example of sol (b) Butter is an example of gel (c) Cheese is an example of emulsion (d) […]
If the initial concentration of the reactant is doubled, the time for half
If the initial concentration of the reactant is doubled, the time for half reaction is also doubled. Then the order of the reaction is
Options
(a) zero (b) fraction (c) three (d) one
The rate of reactions exhibiting negative activation energy
The rate of reactions exhibiting negative activation energy
Options
(a) decreases with increasing temperature (b) increases with increasing temperature (c) does not depend on temperature (d) depents on the height of the potential […]
The conductivity of strong electrolyte
The conductivity of strong electrolyte
Options
(a) does not change with dilution (b) depends upon density of electrolytes itself (c) increases on dilution slightly (d) decreases on dilution
Correct Answer:
increases on dilution […]
In Kjeldahl’s mathod, the nitrogen present is estimated as
In Kjeldahl’s mathod, the nitrogen present is estimated as
Options
(a) N₂ (b) NH₃ (c) NO₂ (d) N₂O₃
Correct Answer:
NH₃
Explanation:
No explanation available. Be the first to write the explanation for […]
Which of the following shows linear structure
Which of the following shows linear structure
Options
(a) acetylene (b) CCl₄ (c) ethane (d) ethene
Correct Answer:
acetylene
Explanation:
Acetylene (H -C ≡ CH) has linear structure.In acetylene, each carbon used its 2s, […]
0.765 gm of acid gives 0.55 g of CO₂ and 0.12 g of H₂O.Then find the ratio
0.765 gm of acid gives 0.55 g of CO₂ and 0.12 g of H₂O.Then find the ratio of the percentage of carbon and hydrogen
Options
(a) 19 : 2 (b) 18 : 11 […]
n-Butane and isobutane are
n-Butane and isobutane are
Options
(a) positional isomers (b) chain isomers (c) functional isomers (d) metamers
Correct Answer:
chain isomers
Explanation:
No explanation available. Be the first to write the explanation for this […]
Bond length between hybridised carbon atom and other carbon atom is minimum in
Bond length between hybridised carbon atom and other carbon atom is minimum in
Options
(a) propene (b) butane (c) propane (d) propyne
Correct Answer:
propyne
Explanation:
The C – C bond length = 1.54Å,