NEET 2021 question paper

Two charged spherical conductors of radius R1 and R2 are connected by a wire. Then the ratio of surface charge densities of the spheres (sigma_1 / sigma_2) is:

If E and G respectively denote energy and gravitational constant, then E / G has the dimensions of:

From a circular ring of mass 'M' and radius 'R' an arc corresponding to a 90° sector is removed. The moment of inertia of the remaining part of the ring about an axis passing through the centre of the ring and perpendicular to the plane of the ring is 'K' times MR^2. Then the value of 'K' is:

If E and G respectively denote energy and gravitational constant, then E/G has the dimensions of:

A step down transformer connected to an ac mains supply of 220 V is made to operate at 11 V, 44 W lamp. Ignoring power losses in the transformer, what is the current in the primary circuit?

Which one of the following polymers is prepared by addition polymerisation?

Match List-I with List-II. List-I: A. 2SO₂(g) + O₂(g) → 2SO₃(g) B. HOCl(g) —(hν)→ •OH + •Cl C. CaCO₃ + H₂SO₄ → CaSO₄ + H₂O + CO₂ D. NO₂(g) —(hν)→ NO(g) + O(g) List-II: I. Acid rain II. Smog III. Ozone depletion IV. Tropospheric pollution Choose the correct answer from the options given below:

Diadelphous stamens are found in

Now a days it is possible to detect the mutated gene causing cancer by allowing radioactive probe to hybridise its complimentary DNA in a clone of cells, followed by its detection using autoradiography because:

Match List-I with List-II. List-I: A. Aspergillus niger B. Acetobacter aceti C. Clostridium butylicum D. Lactobacillus List-II: I. Acetic Acid II. Lactic Acid III. Citric Acid IV. Butyric Acid Choose the correct answer from the options given below: