List of top Chemistry Questions

Identify the product C in the series.
C$_6$H$_5$NO$_2 \xrightarrow{\text{Fe/HCl}} A \xrightarrow{\text{NaNO}_2\text{+HCl, } 273\text{ K}} B \xrightarrow{\text{H}_2\text{O, } 283\text{ K}} C$
A solution of copper sulphate cannot be stored in a zinc vessel because
The rate of the reaction, 2NO + Cl$_2$ $\rightarrow$ 2NOCl is given by the rate equation, rate = k[NO]$^2$[Cl$_2$]. The value of the rate constant can be increased by
When blood cells are placed in 1% (w/v) NaCl aqueous solution:
Which of the following is an amphoteric oxide?
The order of negative standard potential values of \(\text{Li}\), \(\text{Na}\), \(\text{K}\) is
Find the work done by a gas that expands from \(0.2\,\text{dm}^3\) to \(0.8\,\text{dm}^3\) against a constant pressure of \(2\) bar.
Highest boiling point among these isomers (C$_{5}$H$_{12}$):
The half-life of a radioactive substance is 10 days. After 30 days, fraction remaining is:
Which colligative property is used to determine molar mass of polymers?
Phenol is more acidic than alcohol because:
Calculate the work done in oxidation of 2 moles of \(SO_2\) at 298 K, if \(SO_{2(g) + \frac{1}{2}O_{2(g)} \rightarrow SO_{3(g)}\) [Given : R = 8.314 J/K/mol].}
Ethanol + Water shows:
How many degrees of freedom are there at the triple point in a one-component system?
Which of the following gives a Silver mirror test positively with Tollen's reagent?
The maximum energy of photoelectron depends on __________.
Which of the following is not a property of a thermodynamic system?
Which of the following has zero dipole moment ?
SN2 reactions are favoured by:
1 mole of He and 1 mole A are taken in a 10 L rigid container at 400 K, and equilibrium \( A \rightleftharpoons B \) is established. Calculate the partial pressure of He and B at equilibrium if \( K_c = 4 \).

 एक परखनली जिसमें लवण रखा है, कुछ बूँदें तनु \( \text{H}_2\text{SO}_4 \) की मिलाई गईं, जिससे रंगहीन वाष्प प्राप्त हुए जिनकी सिरके जैसी गंध थी। वाष्पों ने नीले लिटमस पत्र को लाल कर दिया। निम्नलिखित में से सही ऋणायन की पहचान कीजिए : 
 

The compound from which chlorobenzene cannot be prepared easily is
Which reagent is used in the Stephen reaction to reduce nitriles to imines?
Gas produced when copper reacts with dilute HNO3: Nitric oxide (NO)
The shape of XeF4 is: Square planar.