List of top Chemistry Questions asked in BITSAT

Velocity constant of a reaction at 290 K was found to be \( 3.2 \times 10^{-3} \). At 300 K it will be:

Due to Frenkel defect, the density of ionic solids

A current of 2.0 A passed for 5 hours through a molten metal salt deposits 22.2 g of metal (At wt. = 177). The oxidation state of the metal in the salt is

Equal weights of NaCl and KCl are dissolved separately in equal volumes of solutions. Molarity of the two solutions will be:

The greenhouse effect is because of the

What will be the main product when acetylene reacts with hypochlorous acid?

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?

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?

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:

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?

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 ions \( \text{O}^{2-} \), \( \text{F}^- \), \( \text{Na}^+ \), \( \text{Mg}^{2+} \) and \( \text{Al}^{3+} \) are isoelectronic. Their ionic radii show:

When the first ionisation energies are plotted against atomic number, the peaks are occupied by

The screening effect of \( d \)-electrons is

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)

Among the following four structures $I$ to $IV$, it is true that

Figure shows a copper rod joined to a steel rod. The rods have equal length and equal crosssectional area. The free end of the copper rod is kept at $0^{\circ} C$ and that of steel rod is kept at $100^{\circ} C$. Find the temperature of the junction of the rod. Conductivity of copper $=390 W / m ^{\circ} C$. Conductivity of steel $=46 W / m ^{\circ} C$