List of top Chemistry Questions

What is the lowest oxidation state possessed by phosphorus in its oxyacids?
Calcite crystals used in Nicol’s prism are formed of:
The rate constant for a second-order reaction, A \(\rightarrow\) Product is 1.62 M\(^{-1}\)s\(^{-1}\). What will be the rate of reaction when the concentration of reactant is 2 \(\times\) 10\(^{-3}\) M?
What is the oxidation number of carbon in glucose?
Which of the following antihistamines contains the -CN group?
Which of the following compounds is obtained when t-butyl bromide is treated with alcoholic ammonia?
When carbolic acid is heated with concentrated nitric acid in the presence of concentrated sulphuric acid, it forms:
Identify the product Y in the following reaction: \[ \text{Maltose} \xrightarrow{\text{Hydrolysis}} X \xrightarrow{\text{dil.HNO}_3 (\text{excess})} Y \]
According to Andrews isothermals, at what temperature the carbon dioxide gas starts to condense at 73 atmosphere?
How many pi bonds and sigma bonds are present in the following molecule?
Which among the following coordination compounds does not have coordination number equal to the number of ligands?
Identify ‘A’ in the following reaction: \[ R-\text{NO}_2 \xrightarrow{\text{Zn}/\text{NH}_4\text{Cl}, \text{neutral medium}} A + \text{H}_2\text{O} \]
Identify the polymer obtained by heating n moles of isobutylene with n moles of isoprene at 100°C in the presence of anhydrous AlCl\(_3\).
Which among the following elements is a soft element as compared to others?
Which of the following is Rosenmund reduction?
In the reaction: \[ N_2 (g) + 3H_2 (g) \rightarrow 2NH_3 (g) \] The rate of disappearance of H\(_2\) is 0.02 M/s. The rate of appearance of NH\(_3\) is:
Which of the following statement is NOT correct about solution?
Which of the following changes will cause an increase in vapor pressure of 1 molal aqueous KI solution at the same temperature?
Enthalpy of fusion and enthalpy of vaporization for water respectively are 6.01 kJ mol\(^{-1}\) and 45.07 kJ mol\(^{-1}\) at 0°C. What is enthalpy of sublimation at 0°C?
In resonance hybrid of ozone molecule, O-O bond length is
The P-P-P bond angle in white phosphorus is
Methoxy ethane on reaction with hot concentrated HI gives
Identify the decreasing order of boiling point of alkanes (i) n-pentane (ii) Isopentane (iii) Neopentane
Which of the following oxyacid of sulfur contains S=S linkage?
Which of the following is a character of catalyst?