List of top Chemistry Questions

From the following which pairs give the faster SN2 reaction?
Which of the following statements is not correct?

\(2HC = CH_2\text{Cl}_2 \xrightarrow{\text{A}} \text{NH}_4\text{Cl}\) \(\xrightarrow{\text{B}}\) \(\text{Identify the compounds A and B}\)

Which of the following relation is correct for gaseous and reversible reactions?
Consider the following mechanism, \[ \text{Cl} + \text{O}_3 \rightarrow \text{ClO} + \text{O}_2 \] \[ \text{ClO} + \text{O} \rightarrow \text{Cl} + \text{O}_2 \] In this mechanism, what is the catalyst?
As temperature is increased, the equilibrium of a gaseous reaction will always
The metallic sodium dissolved in liquid ammonia to form a deep blue colour solution. The deep blue colour is due to the formation of
Compound A undergoes the following reaction to form B and C: \[ \text{KNO}_3 + \text{KOH} \to \text{Black coloured solid} (A) \xrightarrow{\text{heated}} \text{Green coloured solid B} + \text{Pink solution + A} (\text{C decolorised by Fe}^{2+}) \] Identify A, B, and C respectively
The atomic radius of Ne is

A cell has been set up as shown in the following diagram and E$^0$ has been measured as 1.00V at 25°C. Calculate $\Delta$G$^0$ for the reaction.

An aqueous solution of 2% (wt/wt) non-volatile solute exerts a pressure of 1.004 bar at the boiling point of the solvent. What is the molecular mass of the solute?
On reduction of glycolic acid with HI, the product formed is
What is the bond angle between Cl-O-Cl in Cl\(_2\)O\(_7\)?
Which of the following is the correct Lewis structure for the ionic compound Ca(ClO2)2?
The combustion of carbon monoxide yields carbon dioxide. The volume of oxygen gas needed to produce 22 g of carbon dioxide at STP is
A metal rod is in thermal contact with the two heat reservoirs both at constant temperature, one at 100K and the other at 200K. The rod conducts 1000 J of heat from the warmer to the colder reservoir. If no energy is exchanged with the surroundings, what is the total change of entropy?
When a sample of aluminium of unknown mass was subjected to 1.8 kJ of heat, the temperature of the aluminium sample increased from 26°C to 31°C. What was the mass of the sample? (specific heat of Al = 0.90 J/g°C)
Which of the following statement is applicable for the Tyndall effect?
100 g of O2 and 100 g of He(g) are in separate containers of equal volume. Both gases are at 100°C. Which one of the following statements is true?
Which of the following flux is used to remove acidic impurities in metallurgical processes?
Which of the following is used as a food preservative?

For the reactions \(C + O2 \rightarrow CO2\); \(\, \Delta H = -393 \, \text{kJ} 2Zn + O2 \rightarrow 2ZnO\), \(\, \Delta H = -412 \, \text{kJ}\) \(\text{the correct statement is:}\)

The correct set of quantum numbers for an element (Z=17) for the unpaired electron will be
Consider the following reaction sequence of alkene. \[ \text{CH}_3\text{CH} = \text{CH}_3 \xrightarrow{\text{O}_3} A \xrightarrow{\text{H}_2\text{O}} B \] What is the product B?
The decreasing order of reactivity towards electrophilic addition of the following is: I. CH = CH
II. CH_2 = CH_2
III. H_2C = CH - Cl