NEET Mock Test — Free Timed Practice

Question 1

In which kingdom are heterotrophic, cell-walled, spore-forming eukaryotes with chitinous walls placed?

Accepted Answer

Fungi — Fungi are eukaryotic, mostly multicellular heterotrophs with chitin cell walls that reproduce via spores.

Question 2

Which of these is a nitrogen-fixing symbiotic association in Azolla?

Accepted Answer

Anabaena — Anabaena azollae lives in the leaf cavities of Azolla and fixes atmospheric nitrogen — used as a biofertiliser in paddy fields.

Question 3

Which structural feature distinguishes archaebacteria from eubacteria?

Accepted Answer

Branched-chain lipids in cell membrane — Archaea have ether-linked, branched isoprenoid lipids in the membrane, unlike eubacterial ester-linked straight-chain lipids.

Question 4

A body moves with velocity v = 4t^2 m/s. Its acceleration at t = 2 s is:

Accepted Answer

16 m/s² — a = dv/dt = 8t. At t = 2 s, a = 16 m/s².

Question 5

The dimensional formula for Planck's constant is:

Accepted Answer

[M L² T⁻¹] — E = hν ⇒ h = E/ν has dimensions of energy × time = [M L² T⁻²][T] = [M L² T⁻¹].

Question 6

Two capacitors of capacitance 2 μF and 4 μF are connected in series. Equivalent capacitance is:

Accepted Answer

4/3 μF — 1/C = 1/2 + 1/4 = 3/4 ⇒ C = 4/3 μF.

Question 7

The hybridisation of the central atom in SF₆ is:

Accepted Answer

sp³d² — SF₆ has an octahedral geometry with six bond pairs and no lone pairs — sp³d² hybridisation.

Question 8

Which of the following is the strongest reducing agent?

Accepted Answer

I⁻ — Reducing power increases down the halogen group; I⁻ is oxidised most easily, so it is the strongest reducing agent among halide ions.

Question 9

The IUPAC name of (CH₃)₂CHCH₂CH(CH₃)₂ is:

Accepted Answer

2,4-Dimethylpentane — Longest chain has 5 carbons with methyl groups at C2 and C4 — 2,4-dimethylpentane.

Question 10

The functional unit of the kidney is the:

Accepted Answer

Nephron — The nephron — comprising Bowman's capsule, PCT, loop of Henle, DCT, and collecting duct — is the structural and functional unit of the kidney.

NEET Mock Test — Free Timed Practice

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