List of practice Questions

A current loop consists of two identical semicircular parts each of radius $R$, one lying in the $x-y$ plane and the other in $x-z$ plane. If the current in the loop is $i$. The resultant magnetic field due to the two semicircular parts at their common centre is

A $0.66\, kg$ ball is moving with a speed of $100 \,m/s$. The associated wavelength will be $(h = 6.6 \times 10^{-34} \, Js)$

An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to

Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by

Consider the following relations for emf of a electrochemical cell : (a) emf of cell = (Oxidation potential of anode) - (Reduction potential of cathode) (b) emf of cell = (Oxidation potential of anode) + (Reduction potential of cathod) (c) emf of cell = (Reduction potential of anode) + (Reduction potential of cathode) (d) emf of cell = (Oxidation potential of anode) - (Oxidation potential of cathode) Which of the above relations are correct ?

A nitrogen fixing blue-green alga is

A circular disk of moment of inertia it is rotating in a horizontal plane, about its symmetry axis, with a constant angular speed $\omega_i$. Another disk of moment of inertia $I_b$ is dropped coaxially onto the rotating disk. Initially the second disk has zero angular speed. Eventually both the disks rotate with a constant angular speed $\omega_f$. The energy lost by the initially rotating disc to friction is

The fruit fly Drosophila melanogaster was found to be very suitable for experimental verification of chromosomal theory of inheritance by Morgan and his colleagues because :

The genotype of a plant showing the dominant phenotype can be determined by

Vasa eflferentia are the ductules leading from

What does the electronic configuration $ 1s^2, \, 2s^2, \, 2p^ 5 , \, 3s^1 $ indicate ?

The resistance of 1 N solution of acetic acid is 250 $\Omega$, when measured in a cell of cell constant $1.15 cm ^{-1}$. The equivalent conductance (in $ohm^{-1} cm^2 equiv^{-1}) $of 1 N acetic acid is

Which of the following compounds, when heated at 483 K turns to caramel?

Which of the following is phenyl ethanoate?

Show the coordination number of the metal ion, its oxidation number, the number of electrons ind-orbitals and the number of unpaired electrons in d-orbitals respectively in complex $[Co(H_2O)_4SO_3 ]Cl.$

Identify the reaction which is used to Jlbtain $\beta$-hydroxy ketone.

Which of the following is the correct order of priority of group in D-glyceraldehyde?

The density of glycerol is higher than propanol due to

For a reaction between gaseous compounds, $\hspace20mm 2A + B \longrightarrow C + D$ the reaction rate = k[A][B]. If the volume of the container is made $\frac{1}{4}$ of the initial, then what will be the rate of reaction as compared to the initial rate?

Which type of dyes are not used do dye nylon and polyester fibres?

Select the detergent that is used to prepare cosmetics.

The pair of straight lines $ {{x}^{2}}-3{{y}^{2}}=0 $ and the line $ x=1 $ form a triangle which is

Compound that has smell of bitter almonds is

Ethyl alcohol cannot be used as a solvent for methyl magnesium iodide because

A can filed with water is revolved in a vertical circle of radius 4 m and the water does not fall down. The time period for a revolution is about