List of practice Questions

The compounds of \( \text{Ti}^{4+} \) ions are colourless due to ___________.

Find the value of 1 kWh in Joules. 
 

Write the name of the metal nanoparticle used to remove E. coli bacteria from water.

If the unit of the rate constant is \( \text{mol} \, (\text{dm}^{-3} \text{s}^{-1}) \), the order of the reaction would be ____________.

The product of hydrolysis of propyne in the presence of 1% \( HgSO_4 \) and 40% \( H_2SO_4 \) is ___________.

Among the following, the vinylic halide is ____________.

The monomer used in the preparation of Teflon is ____________.

The number of particles present in a Face-Centered Cubic (FCC) unit cell is/are ____________.

The pH of a 0.001 M HCl solution is ___________

The linkage present in Lactose is ___________.

The spin-only magnetic moment of \( \text{Cr}^{3+} \) cation is ___________.

A double convex lens is made of a material having refractive index 1.2. Both the surfaces of the lens are convex. If it is dipped into water of refractive index 1.33, it will behave like: 
 

Differentiate between interference and diffraction of light. Explain qualitatively the diffraction phenomenon of light by a single slit. Light of 6000 Ã… wavelength is incident normally on a single slit of width \( 3 \times 10^{-4} \, \text{cm} \). Find out the angular width of the central maxima. 
 

Two parallel plate capacitors of capacitances \( C \) and \( 2C \) are joined with a battery of voltage difference \( V \) as shown in the figure. If the battery is removed and the space between the plates of the capacitor of capacitance \( C \) is completely filled with a material of dielectric constant \( K \), then find out:

• i) Total capacitance of the combination
• ii) Final voltage difference across the combination
• iii) Total energy stored in the combination.

Show that the circumference of the orbit of an electron revolving in the \( n \)-th orbit is equal to \( n\lambda \) with the help of Bohr's quantum theory. Also, show the emission and absorption spectral lines between energy levels \( n = 1 \) and \( n = 3 \) of hydrogen atom. 
 

What do you mean by the current sensitivity of a moving coil galvanometer? Resistance of a galvanometer is \( 50 \, \Omega \) and for full-scale deflection, the current is \( 0.05 \, \mathrm{A} \). What would be the required length of a wire to convert it into an ammeter of 5 A range? (Area of cross-section of wire = \( 2.7 \times 10^{-6} \, \mathrm{m^2} \), specific resistance of the wire material = \( 5.0 \times 10^{-7} \, \Omega \cdot \mathrm{m} \))

Obtain the formula for the internal resistance of a cell in terms of \( E \), \( V \), and \( R \), where \( E \), \( V \), and \( R \) are the electromotive force of the cell, potential difference across the external resistance, and external resistance, respectively.