JEE Main Online Test 2023 : JEE Main Mock Test Series 2023: Attempt Mock Tests For Free | Test Practice

1. Two equal capacitors are first connected in series and then in parallel. The ratio of the equivalent capacities in the two cases will be:

2. If an emitter current is changed by 4 mA, the collector current changes by 3.5 mA. The value of β will be:

3. The gas released during anaerobic degradation of vegetation may lead to:

4. Out of the following, which type of interaction is responsible for the stabilisation of α-helix structure of proteins ?

5. Which of the following ore is concentrated using group 1 cyanide salt ?

6. The major components in “Gun Metal” are:

7. Consider the elements Mg, Al, S, P and Si, the correct increasing order of their first ionization enthalpy is :

8. Given below are two statements :
Statement I : Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame.
Statement II : Cuprous metaborate is obtained by heating boric anhydride and copper sulphate in a non-luminous flame.
In the light of the above statements, choose the most appropriate answer from the options given below.

9. Match List I with List II.

Choose the correct answer from the options given below :

10 The locus of the mid-point of the line segment joining the focus of the parabola y² = 4ax to a moving point of the parabola, is another parabola whose directrix is:

11. A scientific committee is to be formed from 6 Indians and 8 foreigners, which includes at least 2 Indians and double the number offoreigners as Indians. Then the number of ways, the committee can beformed is:

12. The equation of the plane passing through the point (1, 2, -3)and perpendicular to the planes
3x + y – 2z = 5 and 2x – 5y – z = 7,is:

13. A man is walking on a straight line. The arithmetic mean of the reciprocals of the intercepts of this line on the coordinate axes is 1/4. Three stones A, B and C are placed at the points (1, 1), (2, 2) and (4, 4) respectively. Then which of these stones is/are on the path of the man ?

14. The statement among the following that is a tautology is:

15. Let ƒ : R → R be defined as ƒ(x) = 2x – 1 and g : R – {1} → R be defined as  Then the composition function ƒ(g(x)) is :