In Lassaigne’s test red colour precipitate is obtained which is due to formation of
Options
(a) FeCNS (b) Fe(CNS)₂ (c) NaCNS (d) Fe(CNS)₃
Correct Answer:
Fe(CNS)₃
Explanation:
No explanation available. Be the first […]
The hybridisation of carbon in diamond ,graphite and acetylene is in the order of
Options
(a) sp sp² sp³ (b) sp³sp² sp (c) sp³sp sp² (d) sp² sp³ sp
Correct Answer:
sp³ sp² […]
Which of the following has a tendency for covalent compound formation
Options
(a) Na (b) Mg (c) Ca (d) Ba
Correct Answer:
Mg
Explanation:
No explanation available. Be the first to write the […]
Which of the following is not efflorescent?
Options
(a) NaOH (b) CuSO₄ (c) MgSO₄ (d) Hydrated CuSO₄
Correct Answer:
Hydrated CuSO₄
Explanation:
No explanation available. Be the first to write the explanation for […]
When KMnO₄ reacts with KBr in alkaline medium gives bromate ion. Then oxidation state of Mn changes from +7 to
Options
(a) 6 (b) 4 (c) 3 (d) 2
Correct Answer:
4
Explanation: […]
The change in oxidation state of sulphur when sulphur dioxide is passed in an acidified K₂Cr₂O₇ solution is from
Options
(a) 4 to 0 (b) 4 to 2 (c) 4 to 6 (d) […]
At 25⁰C the pH value of a solution is 6, then the solution is
Options
(a) acidic (b) neutral (c) basic (d) alkaline
Correct Answer:
acidic
Explanation:
No explanation available. Be the first […]
The precipitation occurs if ionic product is
Options
(a) equal to solubility product (b) less than solubility product (c) more than solubility product (d) equal or less than solubility product
Correct Answer:
more […]
Which among the following is an extensive property of the system
Options
(a) Temperature (b) volume (c) Refractive index (d) Viscosity
Correct Answer:
volume
Explanation:
Volume is an extensive property because it depends upon […]
When enthalpy and entropy change for a chemical reaction are – 2.5 x 10³ cals and 7.4 cals deg⁻¹ respectively predict the reaction at 298 K is
Options
(a) irreversible (b) reversible (c) spontaneous […]
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