KCET Sample Questions
Below are the sample questions of the KCET exam along with the solutions
- The ratio of molar-specific heat of oxygen is
(A) 1.4
(B) 1.67
(C) 1.33
(D) 1.28
Ans. A
- For a particle executing simple harmonic motion (SHM), at its mean position
(A) Velocity is zero and acceleration is maximum
(B) Velocity is maximum and acceleration is zero
(C) Both velocity and acceleration are maximum
(D) Both velocity and acceleration are zero
Ans. B
- A motorcyclist moving towards a huge cliff with a speed of 18 kmh-1, blows a horn of
source frequency 325 Hz. If the speed of the sound in the air is 330 ms-1, the number of beats heard by him is
(A) 5
(B) 4
(C) 10
(D) 7
Ans. A
- A uniform electric field 5 1 E 3 10 NC is acting along the positive Y-axis. The electric flux through a rectangle of area 10cm 30cm whose plane is parallel to the Z-X plane is
(A) 3 12 10 Vm
(B) 3 9 10 Vm
(C) 3 15 10 Vm
(D) 3 18 10 Vm Ans. B
- In an experiment to determine the temperature coefficient of resistance of a conductor, a coil of wire X is immersed in a liquid. It is heated by an external agent. A meter bridge set-up is used to determine resistance of the coil X at different temperatures. The balancing points measured at temperatures 0 1 t 0 C and 0 2 t 100 C are 50 cm and 60 cm respectively. If the standard resistance taken out is S 4 in both trials, the temperature coefficient of the coil is
(A) 0 1 0.05 C (B) 0 1 0.02 C (C) 0 1 0.005 C (D) 0 1 2.0 C
Ans. C
- Select the correct statement :
(A) Roasting involves heating the ore in the absence of air
(B) Calcination involves heating the ore above its melting point
(C) Smelting involves heating the ore with a suitable reducing agent and flux below its melting point
(D) Calcination of calcium carbonate is endothermic
Ans. D
- Identify the incorrect statement from the following :
(A) Oxides of nitrogen in the atmosphere can cause depletion of the ozone layer
(B) Ozone absorbs the intense ultraviolet radiation of the Sun
(C) Depletion of the ozone layer is because of its chemical reactions with chlorofluoro alkanes
(D) Ozone absorbs infrared radiation
Ans. D
- The incorrect statement about the Hall-Heroult process is :
(A) Carbon anode is oxidised to CO and CO2
(B) Na3AlF6
helps to decrease the melting point of the electrolyte
(C) CaF2
helps to increase the conductivity of the electrolyte
(D) Oxidation state of oxygen changes in the overall cell reaction
Ans. D
- Sodium enthanoate on heating with soda lime gives ‘X’. Electrolysis of aqueous solution of sodium ethanoate gives ‘Y’, ‘X’ and ‘Y’ respectively are :
(A) Methane and Ethane
(B) Methane and Methane
(C) Ethane and Methane
(D) Ethane and Ethane
Ans. A
- Biologically active adrenaline and ephedrine used to increase blood pressure contain :
(A) Primary amino group
(B) Secondary amino group
(C) Tertiary amino group
(D) Quaternary ammonium salt
Ans. B
- Two finite sets have m and n elements respectively. The total number of subsets of the first set is 56 more than the total number of subsets of the second set. The values of m and n respectively are
(A) 7, 6
(B) 5, 1
(C) 6, 3
(D) 8, 7
Ans. C
- If in two circles, arcs of the same length subtend angles 30 and 78 at the centre, then the ratio of their radii is -
(A) 5/13
(B) 13/5
(C) 13 4
(D) 4 13
Ans. B
- Let A = {2, 3, 4, 5, ...... 16, 17, 18}. Let R be the relation on the set A of ordered pairs of positive integers defined by (a, b) R (c, d) if and only if ad = bc for all (a, b), (c, d) in A A. Then the number of ordered pairs of the equivalence class of (3, 2) is
(A) 4
(B) 5
(C) 6
(D) 7
Ans. C
- Which one of the following observations is correct for the features of the logarithm function to any base b > 1?
(A) The domain of the logarithm function is R, the set of real numbers.
(B) The range of the logarithm function is R+
, the set of all positive real numbers.
(C) The point (1, 0) is always on the graph of the logarithm function.
(D) The graph of the logarithm function decreases as we move from left to right.
Ans. C
- The equation xy = 0 in three-dimensional space represents
(A) A pair of straight lines
(B) A plane
(C) A pair of planes at right angles
(D) A pair of parallel planes
Ans. C
