NEET Test 186...

Three faradays of electricity are passed through molten Al₂O₃, aqueous solution of CuSO₄, and molten NaCl taken in separate electrolytic cells. The amounts of Al, Cu and Na deposited at the cathodes will be in the molar ratio:

A rectangular loop of sides 8 cm and 2 cm with a small break in it is moving out of a region of uniform magnetic field of 0.3 T, directed normal to the loop. What is the emf developed across the break if the velocity of the loop is 1 cms^-1 in a direction normal to the longer side of the loop?

Which of the following statement is correct with regard to Bergmann's rule?

Two identical spheres A and B lie on a smooth horizontal circular groove at opposite ends of a diameter. A is projected along the groove and at the end of time t, it impinges on B. If e is the coefficient of restitution, the second impact will occur after a time

A domain in ferromagnetic iron is in the form of a cube of side length 1μm. Estimate the number of iron atoms in the domain and the maximum possible dipole moment and magnetisation of the domain. The molecular mass of iron is 55 g/mole and its density is 7.9 g/cm³. Assume that each iron atom has a dipole moment of 9.27 × 10⁻²⁴ A m²:

A compound contains three elements A,B and C, if the oxidation of A = +2,B = +5 and C = −2, the possible formula of the compound is:

At a particular locus, the frequency of ′A′ allele is 0.6 and that of ′a′ is 0.4. What would be the frequency of heterozygotes in a randomly mating population of equilibrium?

In Cannabis, pollination is carried out by:

If the mass and moment of inertia of a solid sphere and spherical shell are the same, the ratio of their radii will be:

A dioecious flowering plant prevents both