JEE: 10 sample questions

A fixed preview from the JEE bank. Answers, explanations and fresh papers unlock with a plan.

Create a free account

Q1

For protecting a magnetic needle, it should be placed in:

A.An iron box

B.A wooden box

C.A metallic box

D.None of these
Q2

The resistances in the two arms of a metre bridge are 5 Ω and R Ω, respectively. When the resistance R is shunted with an equal resistance, the new balance point is at 1.6 l₁ (i.e., l₁′ = 1.6 l₁). The resistance R is:

A.10 Ω

B.15 Ω

C.20 Ω

D.25 Ω
Q3

Predict the product C obtained in the following reaction of 1-butyne: CH₃CH₂–C≡CH + HCl → B → C

A.CH₃CH₂CH₂CH₂Cl (1-chlorobutane)

B.CH₃CH₂CH(Cl)CH₃ (2-chlorobutane)

C.CH₃CH₂C(Cl)=CH₂ (2-chloro-1-butene; vinyl chloride intermediate)

D.CH₃CH₂CCl₂CH₃ (2,2-dichlorobutane)
Q4

A resonance tube (air column closed at one end) of length 40 cm resonates with a tuning fork of frequency 450 Hz in its first resonance. Ignoring end correction, the velocity of sound in air is:

A.1020 m/s

B.720 m/s

C.620 m/s

D.820 m/s
Q5

The question text is corrupted and incomplete (deflection relation and option details are missing). Please provide the original, readable question statement and the four options so it can be accurately audited and corrected.

A.Not available (options missing).

B.Not available (options missing).

C.Not available (options missing).

D.Not available (options missing).
Q6

Which of the following 0.10 m aqueous solutions will have the lowest freezing point?

A.Al₂(SO₄)₃

B.C₆H₁₂O₆

C.KCl

D.C₁₂H₂₂O₁₁
Q7

A boy of mass 20 kg is standing on a 80 kg free to move long cart. There is negligible friction between cart and ground. Initially, the boy is standing 25 m from a wall. If he walks 10 m on the cart towards the wall, then the final distance of the boy from the wall will be:

A.15 m

B.12.5 m

C.15.5 m

D.17 m
Q8

The metal ion whose electronic configuration is not affected by the nature of the ligand and which gives a violet colour in non-luminous flame under hot condition in borax bead test is

A.Cr3+

B.Ti3+

C.Ni2+

D.Mn2+
Q9

When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes are Cathode / Anode

A.Cathode: pure zinc; Anode: pure copper

B.Cathode: impure sample; Anode: pure copper

C.Cathode: impure zinc; Anode: impure sample

D.Cathode: pure copper; Anode: impure sample
Q10

The pair of compounds having metals in their highest oxidation state is:

A.MnO2 and CrO2Cl2

B.[NiCl4]2− and [CoCl4]2−

C.[Fe(CN)6]3− and [Cu(CN)4]2−

D.[FeCl4]− and Co2O3

Want the answer key, explanations and unlimited fresh papers?

Plans from ₹249. Pay via UPI, no auto-billing.

Get JEE access