August 5, 2021 (KEAM 2021 Paper 1 - Physics & Chemistry) | An air capacitor and an identical capacitor filled with a dielectric medium of dielectric constant 5 are connected in series to a voltage source of 12V. The fall of potential across C1 and C2 are respectively. - 2V and 10V
- 10V and 2V
- 6V and 6V
- 4V and 8V
- 8V and 4V
| Option: B | Question Paper PDF |
The ratio of magnitudes of electrostatic force between two protons at a distance r apart to that between two electrons at the same distance of separation is | Option: A |
When two charges are kept in an air medium, at a certain distance d apart, the force between them is F. When they are kept in a dielectric medium at the same distance of separation, the force between them becomes F/2. Then the dielectric constant of the medium is | Option: B |
The conversion of benzene diazonium chloride to bromobenzene by treating with HBr in the presence of copper powder is called - Sandmeyer reaction
- Gattermann reaction
- Wurtz reaction
- Hoffmann reaction
- Gabriel synthesis
| Option: B | Answer Key PDF |
The drug used to inhibit the enzymes which catalyze the degradation of noradrenaline is - Phenelzine
- Prontosil
- Cimetidine
- Terfenandine
- Chloramphenicol
| Option: A |
No two electrons in an atom can have the same set of four quantum numbers. This is known as - Hund’s rule
- Pauli’s exclusion principle
- Aufbau principle
- Heisenberg’s principle
- Fajan’s rule
| Option: B |
August 5, 2021 (KEAM 2021 Paper 2 - Mathematics) | A bag contains 5 yellow, 3 green, 2 blue, and 7 white balls. If 4 balls are chosen at random, then the probability that none of them are white is | Option: D | Question Paper PDF |
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An urn contains 25 marbles which are numbered from 1 to 25 and a marble is chosen at random two times with a replacement. Then the probability that both times the marble has the same number is | Option: B |
Answer Key PDF |
Two dice are rolled. If A is the event that the sum of the numbers is 4 and B is the event that at least one of the dice shows a 3, then P(A|B) is equal to | Option: C |
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