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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