List of top Chemistry Questions

The number of alkenes that exhibit cis/trans isomerism with the molecular formula C\(_5\)H\(_{10}\) is:
The ratio of sp\(^3\), sp\(^2\) and sp hybridized carbons present in CH\(_3\)-CH = CH-CN is:
Which of the following arrangement of magnetic moment is correct for ferrimagnetic substance?
The catalyst, promoter, and poison for Haber's process are respectively
Sphalerite is the ore of metal \( M_1 \) and malachite is the ore of metal \( M_2 \). Atomic numbers of \( M_1 \) and \( M_2 \) are respectively
Find A and B
oxide of nitrogen
The decomposition products of [FeO$_4$]$^{2-}$ are:
Which of the following ions has [Xe] 4f$^7$ 6s$^0$ as outer electronic configuration?
Buna–N is a polymer of:
Low levels of which of the following chemical substances cause depression?
The optical rotation of a racemic mixture of 2-methyl 1-butanol is:
What is ‘X’ in the following reaction?
2–Bromo–2–methyl butane $\xrightarrow{X}$ 2–methyl–2–butanol
What are ‘X’ and ‘Y’ in the following reactions?
Acetal $\xrightarrow{X}$ CH$_3$COCH$_3$ $\xrightarrow{Y}$ Oxime
The correct order of reactivity of the following towards nucleophilic addition reactions is: \[ \text{I. CH}_3\text{COCH}_3,\quad \text{II. CH}_3\text{CH}_2\text{CHO},\quad \text{III. ClCH}_2\text{CHO} \]
The suitable reagent to carry out the following reaction is:
suitable reagent to carry out the following reaction
Hydrolysis products of isobutyl isonitrile are:
What is the ratio of σ and pi bonds in pyrophosphoric acid ?
The plot of log 𝑘𝑓 versus \(\frac{1}{T}\) for a reversible reaction, A (g) ⇌ P (g) is shown. 

Pre-exponential factors for the forward and backward reactions are 1015s-1 and 1011s-1 respectively. If the value of log K for the reaction at 500 K is 6, the value of |log kb| at 250K is_________[K = equilibrium constant of the reaction, 𝑘𝑓 = rate constant of forward reaction, 𝑘𝑏 = rate constant of backward reaction]
A gas at a pressure of 2 atm is heated from 25 °C to 323 °C and simultaneously compressed to \(\frac{2^{rd}}{3}\) of its original value. Then the final pressure is

Match the following 

List I (Method)List II (Metal refined)
A) Zone refiningI) Sn
B) LiquationII) In
C) Vapour phase refiningIII) Zn
D) DistillationIV) Zr
 V) Al

Match the following:
 
List – I
A. Broad spectrum
B. Typhoid
C. Bactericidal
D. Bacteriostatic

List – II
I. Amoxycillin
II. Vancomycin
III. Erythromycin
IV. Chloramphenicol
V. Ofloxacin

Match the following: 

List IList II
A. Broad spectrumI. Amoxycillin
B. TyphoidII. Vancomycin
C. BactericidalIII. Erythromycin
D. BacteriostaticIV. Chloramphenicol
 V. Ofloxacin

The molar conductivity of 0.027 M methanoic acid is 40.42 S cm2 mol–1. The value of dissociation constant of this acid is (Given: \(\lambda^0_{H^+} = 349.6~\text{S cm}^2 \text{mol}^{-1},~\lambda^0_{HCOO^-} = 54.6~\text{S cm}^2 \text{mol}^{-1}\))

Which is the correct order of the following alkyl halides for an SN2 reaction?
alkyl halides for an SN2 reaction
Which of the following is a hemiacetal?