NEET PATRIKA - Merit Yard

Daily NEET Worksheet – Day 1

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Physics - Day 1

1. A lens is made up of 3 different transparent media as shown in figure. A point object O is placed on its axis beyond 2f. How many real images will be obtained on the other side? [NEET 2023 Manipur]

a) 2
b) 1
c) 3
d) no image will be formed

2. Which set of colors will come out in air for a situation shown in figure? [NEET 2023 Manipur]

a) yellow, orange and red
b) All
c) Orange, red and violet
d) Blue, green and yellow

3. Two thin lenses are of same focal lengths (F), but one is convex and the other one is concave. When they are placed in contact with each other, the equivalent focal length of the combination will be : [NEET 2023]

a) f/4
b) f/2
c) infinite
d) zero

4. A biconvex lens has radii of curvature, 20 cm each. If the refractive index of the material of the lens is 1.5, the power of the lens is [NEET 2022 Phase 1]

a) +2D
b) +20D
c) +5D
d) infinity

5. A light ray falls on a glass surface of refractive index √3, at an angle 60°. The angle between the refracted and reflected rays would be [NEET 2022 Phase 1]

a) 30°
b) 60°
c) 90°
d) 120°

6. An object is placed on the principal axis of a concave mirror at a distance of 1.5 f (f is the focal length). The image will be at [NEET 2020]

a) −3f
b) 1.5f
c) −1.5f
d) 3f

7. An object is placed at a distance of 40 cm from a concave mirror of focal length 15 cm. If the object is displaced through a distance of 20 cm towards the mirror, the displacement of the image will be [NEET 2018]

a) 30 cm towards the mirror
b) 36 cm away from the mirror
c) 30 cm away from the mirror
d) 36 cm towards the mirror

8. A man is 6 ft tall. In order to see his entire image, he requires a plane mirror of minimum length equal to [CBSE AIPMT 2000]

a) 6 ft
b) 12 ft
c) 2 ft
d) 3 ft

9. If two mirrors are kept inclined at 60° to each other and a body is placed at the middle, then total number of images formed is [CBSE AIPMT 1995]

a) six
b) five
c) four
d) three

10. Ray optics is valid, when characteristic dimensions are [CBSE AIPMT 1989]

a) of the same order as the wavelength of light
b) much smaller than the wavelength of light
c) of the order of one millimetre
d) much larger than the wavelength of light

🧪 Chemistry - Day 1

1. Which of the following undergoes nucleophilic substitution by SN1 mechanism? [AIPMT-2005]

a) Ethyl chloride
b) Isopropyl chloride
c) Benzyl chloride
d) Chloro benzene

2. Which of the following compounds has the highest boiling point? [AIIMS-2006]

a) CH₃CH₂CH₂Cl
b) CH₃CH₂CH₂CH₂Cl
c) CH₃CH(CH₃)CH₂Cl
d) (CH₃)₃CCl

3. The correct increasing order of the reactivity of halides for SN1 reaction is – [AIIMS-2006]

a) CH₃–CH₂–X < (CH₃)₂CH–X < CH₂=CH–CH₂–X < PhCH₂–X
b) (CH₃)₂CH–X < CH₃–CH₂–X < CH₂=CH–CH₂–X < PhCH₂–X
c) PhCH₂–X < (CH₃)₂CH–X < CH₃–CH₂–X < CH₂=CH–CH₂–X
d) CH₂=CH–CH₂–X < PhCH₂–X < (CH₃)₂CH–X < CH₃–CH₂–X

4. For the following : [AIPMT-2007]
(A) I⁻, (B) Cl⁻, (C) Br⁻ — The increasing order of nucleophilicity would be:

a) Cl⁻ < Br⁻ < I⁻
b) I⁻ < Cl⁻ < Br⁻
c) Br⁻ < Cl⁻ < I⁻
d) I⁻ < Br⁻ < Cl⁻

5. Predict the product ‘C’ obtained in the following reaction of 1-butyne: [AIPMT 2007]

6. The order of decreasing reactivity towards electrophilic reagent for the following: [AIPMT 2007]

(A) Benzene, (B) Toluene, (C) Chloro benzene, (D) Phenol

a) b > d > a > c
b) d > c > b > a
c) d > b > a > c
d) a > b > c > d

7. A (Predominantly) is – [AIPMT 2008]

8. Benzene reacts with CH₃Cl in the presence of anhydrous AlCl₃ to form: [AIPMT 2009]

a) Xylene
b) Toluene
c) Chlorobenzene
d) Benzylchloride

9. Nitrobenzene can be prepared from benzene by using a mixture of conc. HNO₃ and conc. H₂SO₄. In the mixture, nitric acid acts as a/an: [AIPMT 2009]

a) Catalyst
b) Reducing agent
c) Acid
d) Base

10. Which of the following reactions is an example of nucleophilic substitution reaction? [AIPMT 2009]

a) RX + Mg → RMgX
b) RX + KOH → ROH + KX
c) 2RX + 2Na → R–R + 2NaX
d) RX + H₂ → RH + HX

🧬 Biology - Day 1

1. If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6 × 10⁹ bp, then the length of the DNA is approximately [NEET-2020]

a) 2.5 meters
b) 2.2 meters
c) 2.7 meters
d) 2.0 meters

2. Which of the following statements is correct? [NEET-2020]

a) Adenine pairs with thymine through one H-bond
b) Adenine pairs with thymine through one H-bond
c) Adenine does not pair with thymine
d) Adenine pairs with thymine through two H-bonds

3. Which scientist experimentally proved that DNA is the sole genetic material in bacteriophage? [NEET OD 2019]

a) Beadle and Tautum
b) Messelson and Stahl
c) Hershey and Chase
d) Jacob and Monod

4. The final proof for DNA as the genetic material came from the experiments of: [NEET 2017]

a) Hershey and Chase
b) Avery, Mcleod and McCarty
c) Hargobind Khorana
d) Griffith

5. DNA fragments are: [2017]

a) Negatively charged
b) Neutral
c) Either positively or negatively charged depending on their size
d) Positively charged

6. Which of the following RNAs should be most abundant in animal cell? [2017]

a) t-RNA
b) m-RNA
c) mi-RNA
d) r-RNA

7. The association of histone H1 with a nucleosome indicates: [2017]

a) DNA replication is occurring.
b) The DNA is condensed into a Chromatin Fibre.
c) The DNA double helix is exposed.
d) Transcription is occurring.

8. A complex of ribosomes attached to a single strand of RNA is known as [2016]

a) Polysome
b) Polymer
c) Polypeptide
d) Okazaki fragment

9. In sea urchin DNA, which is double stranded, 17% of the bases were shown to be cytosine. The percentages of the other three bases expected to be present in this DNA are: [2015 RS]

a) G 17%, A 16.5%, T 32.5%
b) G 17%, A 33%, T 33%
c) G 8.5%, A 50%, T 24.5%
d) G 34%, A 24.5%, T 24.5%

10. Which one of the following is not applicable to RNA? [2015 RS]

a) 5’ phosphoryl and 3’ hydroxyl ends
b) Heterocyclic nitrogenous bases
c) Chargaff’s rule
d) Complementary base pairing
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