When 25g of Na₂SO₄ is dissolved in 10³ kg of solution,its concentration will be
Options
(a) 2.5ppm (b) 25ppm (c) 250ppm (d) 100ppm
Correct Answer:
25ppm
Explanation:
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The basic component of the smog is
Options
(a) PAN (b) PBN (c) NO₂ (d) all of these
Correct Answer:
all of these
Explanation:
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Ethyl iodide when heated with sodium in dry ether gives pure
Options
(a) C₄H₁₀ (b) C₂H₆ (c) C₃H₈ (d) C₂H₅OH
Correct Answer:
C₄H₁₀
Explanation:
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The correct order of decreasing acidic nature of H₂O,ROH,CH≡CH and NH₃ is
Options
(a) CH≡CH>H₂O>ROH>NH₃ (b) H₂O>ROH>CH≡CH>NH₃ (c) ROH>NH₃>CH≡CH>H₂O (d) H₂o>ROH>NH₃>CH≡CH
Correct Answer:
H₂O>ROH>CH≡CH>NH₃
Explanation:
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The type of hybridisation of boron in diboron is
Options
(a) sp³ hybridisation (b) sp² hybridisation (c) sp hybridisation (d) sp³ d² hybridisation
Correct Answer:
sp³ hybridisation
Explanation:
No explanation available. Be the […]
The oxidation state of Cr in K₂Cr₂O₇ is
Options
(a) -5 (b) 6 (c) -6 (d) 5
Correct Answer:
6
Explanation:
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HSO₄⁻ + OH⁻ → SO₄²⁻ + H₂O. which is correct about conjugate acid – base pair
Options
(a) HSO₄⁻ is conjugate acid of base SO₄²⁻ (b) SO₄²⁻ is conjugate acid of base H₂O […]
The bond dissociation energies of H₂, Cl₂ and HCl are 104, 58, and 103 kcal mol⁻¹ respectively. The enthalphy of formation of HCl would be
Options
(a) -22 Kcal mol⁻¹ (b) -44 Kcal […]
If 200 mL of gas at 27°C is cooled to 7°C at constant pressure, its final volume will be
Options
(a) 350mL (b) 135mL (c) 540mL (d) 280mL
Correct Answer:
280mL
Explanation:
No […]
Which of the following is a planar?
Options
(a) XeF₂ (b) XeO₃F (c) XeO₂F₂ (d) XeF₄
Correct Answer:
XeF₄
Explanation:
No explanation available. Be the first to write the explanation for this question […]
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