An organic compound containing C, H, N gave the following analysis: C=40%; H=13.33%; N=46.67%. Its empirical formula would be
Options
(a) C₂H₇N₂ (b) CH₅N (c) CH₄N (d) C₂H₇N
Correct Answer:
CH₄N
Explanation:
At […]
Considering the state of hybridization of carbon atoms, find out the molecule among the following which is linear?
Options
(a) CH₃-CH=CH-CH₃ (b) CH₃-C≡C-CH₃ (c) CH₂=CH-CH₂-C≡CH (d) CH₃-CH₂-CH₂-CH₃
Correct Answer:
CH₃-C≡C-CH₃
Explanation:
sp³ sp […]
An organic compound containing C, H and O gave the following analysis: C=40%; H=6.66%; Its empirical formula would be
Options
(a) C₃H₆O (b) CHO (c) CH₂O (d) CH₄O
Correct Answer:
CH₂O
Explanation:
At […]
Identify the correct order of the size of the following elements: Ca, K, Ar,Cl,S
Options
(a) Ca²⁺< K⁺< Ar < Cl⁻ < S²⁻ (b) Ar < Ca²⁺< K⁺< Cl⁻< S²⁻ (c) Ca²⁺< Ar […]
A bromoalkane contains 35% carbon and 6.57% hydrogen by mass. Calculate the empirical formula of this bromoalkane.
Options
(a) CH₂Br (b) C₂H₂Br₂ (c) C₄H₄Br (d) C₄H₉Br
Correct Answer:
C₄H₉Br
Explanation:
1) Assume 100 […]
The correct order of ionisation energy for comparing carbon, nitrogen and oxygen is
Options
(a) CO (b) C>NN>O (d) C>N
The correct order of increasing bond length of C–H, C–O, C–C and C=C is
Options
(a) C–C < C=C < C–O < C–H (b) C–O < C–H < C–C < C=C (c) C–H […]
In which of the following pairs, the two species are iso-structure?
Options
(a) SO₃²⁻ and NO₃⁻ (b) BF₃ and NF₃ (c) BrO₃⁻ and XeO₃ (d) SF₄ and XeF₄
Correct Answer:
BrO₃⁻ and XeO₃
Chemical properties of lithium and magnesium are similar because
Options
(a) these belongs to same group (b) shows disgonal relationship (c) both has same ionisation potential (d) both has same electron affinity
Correct […]
In which of the following pairs of molecules/ions, the central atoms have sp²-hybridisation?
Options
(a) NO₂⁻ and NH₃ (b) BF₃ and NO₂⁻ (c) NH₂⁻ and H₂O (d) BF₃ and NH₂⁻
Correct Answer:
BF₃ […]
2017 Copyright Doctor Dreams Training Academy