List of top Chemistry Questions

The probability density plots of 1s and 2s orbitals are given in figure.

The density of dots in a region represents the probability density of finding electrons in the region. On the basis of the above diagram, which of the following statements is incorrect?

Which named reaction contains dichlorocarbene intermediate?

Which of the following factors affect the basic strength of amines?
(i) Inductive effect
(ii) Steric hindrance
(iii) Solvation effect
(iv) Solubility in organic solvents

What is \( x \) in the following reaction? \[ {Al} (s) + {NaOH} (aq) + {H}_2O (l) \rightarrow x + {H}_2 (g) \]

Among the ligands \( {NH}_3, \, {en}, \, {CN}^-, \, {CO} \), the correct order of their increasing field strength is:

One mole of an ideal gas at 350K is in a 2.0 L vessel of thermally conducting walls, which are in contact with the surroundings. It undergoes isothermal reversible expansion from 2.0L to 3.0L against a constant pressure of 4 atm. The change in entropy of the surroundings (ΔS) is JK (Nearest integer) Given: R = 8.314 J K^-1 Mol^-1.

Match List I with List II :

List-I Coordination entity		List-II Wavelength of light absorbed in nm
A.	\([CoCl(NH_3)_5]^{2+}\)	I.	310
B.	\([Co(NH_3)_6]^{3+}\)	II.	475
C.	\([Co(CN)_6]^{3−}\)	III.	535
D.	\([Cu(H_2O)_4]^{2+}\)	IV.	600

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Identify A, B and C in the sequence :

Electronic configuration of d⁶ when Δ_a < P

Select the reagents a and b respectively, used in the Hell-Volhard-Zelinsky reaction :

X - Cl, Br
A. X₂
B. X₂ / Red Phosphorus
C. H₂O
D. SoCl₂
E. X₂ / Yellow Phosphorus
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Aniline forms meta nitro derivative in strongly acidic medium. The reason is-

Match List -I with List-II

	List -I		List-II
A	Buna-S	I	Vinyl chloride
B	Neoprene	II	1,3-Butadiene and styrene
C	PVC	III	Tetra flouroethene
D	Teflon	IV	Chloroprene

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Which of the following statements relating to the acidic character of alcohols is not true ?

Arrange the following in increasing order of their boiling points :
A. CH₃CH₂CH₂CHO
B. CH₃CH₂CH₂CH₂OH
C. C₂H₅OC₂H₅
D. CH₃CH₂CH₂CH₂CH₃
E. CH₃CH₂CH₂COOH
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Which of the following are fat soluble vitamins:
(A) vit A
(B) vit B
(C) vit D
(D) vit E
(E) vit K
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Identify the pseudohalogen from the following ions :

Which of the following does not depict an isomer of oxetane

When air was passed through glass bulb containing 16 g of an organic compound in 100 g of water and then through glass bulb containing only water at the same temperature and then finally through anhydrous CCl₄ glasstube, the loss in mass of glass bulb containing water was 0.052 g and the gain in mass of CCl₄ tube was 1.86 g. Calculate the molecular mass of the organic substance.

The bond angle

in methanol is :

The sodium soap prepared from glyceryl palmite
(C₁₅H₃₁COO)₃C₃H₅ is :

\(MnO_4^-\) + H₂O + I^- → MnO₂ + OH^- + X
Compound ‘X’ in the above reaction is :

[Co(NH₃)₄Cl(NO₂)]Cl will show:
A. Solvate isomerism
B. Linkage isomerism
C. Coordination isomerism
D. Ionisation isomerism
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The chemical used for leaching of silver and gold is :

Which statement is not true for a detergent molecule ?

Match List I with List II

List I		List II
A.	Rosenmund reduction	I.	CrO₂Cl₂CS₂,H₃O⁺
B.	Etard Reaction	II.	CO, HCl Anhyd. AlCl₃/CuCl
C.	Gamenman-Koch reaction	III.	H₂-Pd-BaSO₄
D.	Clemmensen reduction	IV.	Zn-Hg/HCl

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