List of practice Questions

There is a shell of mass \( M \) and density of the shell is uniform. The work done to take a point mass from point A to B is \( [AB = r] \) 
 

In the circuit shown in figure, the potential difference between points A and B is 16 V. The current passing through \( 2 \Omega \) resistance will be 
 

The circuit is equivalent to 

The most stable carbocation among the following is 

What will be the main product when acetylene reacts with hypochlorous acid?
The greenhouse effect is because of the
Among the following four structures I to IV, it is true that
The number of enantiomers of the compound \( \text{CH}_3 \text{CHBr} \text{CHBrCOOH} \) is
Which one of the following reactions is expected to readily give a hydrocarbon product in good yields?
When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide solution, the ratio of volumes of hydrogen evolved is:
The alkali metals form salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decreases in which of the following orders?
If 1.0 mole of \( \text{I}_2 \) is introduced into a 1.0 litre flask at 1000 K, at equilibrium (\( K_c = 10^{-6} \)), which one is correct?
For the reaction \( \text{CO(g)} + \frac{1}{2} \text{O}_2 (g) \rightarrow \text{CO}_2 (g) \), \( K_c \) is
The oxidation state of sulphur in \( \text{Na}_2 \text{S}_4 \text{O}_6 \) is
Increasing order of rms velocities of \( \text{H}_2 \), \( \text{O}_2 \), \( \text{N}_2 \) and \( \text{HBr} \) is
For the dissociation reaction, \( \text{H}_2 \rightarrow \text{H} + \text{H} \), \( \Delta H = 162 \, \text{Kcal} \), heat of atomisation of H is
The enthalpy of combustion of 2 moles of benzene at 27°C differs from the value determined in bomb calorimeter by
The screening effect of \( d \)-electrons is
When the first ionisation energies are plotted against atomic number, the peaks are occupied by
The ions \( \text{O}^{2-} \), \( \text{F}^- \), \( \text{Na}^+ \), \( \text{Mg}^{2+} \) and \( \text{Al}^{3+} \) are isoelectronic. Their ionic radii show:
Using MOT, which of the following pairs denote paramagnetic species?
How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0 M \( \text{HNO}_3 \)? The concentrated acid is 70% \( \text{HNO}_3 \).
The Bohr orbit radius for the hydrogen atom (\( n = 1 \)) is approximately 0.530 Å. The radius for the first excited state (\( n = 2 \)) orbit is (in Å)
Which of the following electromagnetic radiations has the smallest wavelength?
Eddy currents are produced when