A chain reaction is continuous due to:
- Aproduction of more neutrons during fission
- Blarge energy
- Clarge mass defect
- Ddaughter nuclei formed
Question types
Model Paper 8 question types
180 questions across 4 question groups — pick any mix to generate a NEET paper with step-by-step answer keys.
180
Questions
4
Question groups
5
Question types
01
SECTION - A [PHYSICS - MCQ]
45 Q→02SECTION - A [CHEMISTY - MCQ]
45 Q→03SECTION - A [BOTANY - MCQ]
45 Q→04SECTION - A [ZOOLOGY - MCQ]
45 Q→Sample Questions
Model Paper 8 questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
An electron from various excited states of hydrogen atom emits radiation to come to the ground state. Let $\lambda_n, \lambda_g$ be the de Broglie wavelength of the electron in the $n ^{\text {th }}$ state and the ground state respectively. Let $\Lambda_n$ be the wavelength of the emitted photon in the transition from the $n ^{\text {th }}$ state to the ground state. For large $n , ~(A, B$ are constants)
- A$\Lambda_n \approx A+ B \lambda_n$
- B$\Lambda_n^2 \approx A+ B \lambda_n^2$
- C$\Lambda_n \approx A+\frac{B}{\lambda_n^2}$
- D$\Lambda_n^2 \approx \lambda$
The work function of a substance is 4.0 eV . The longest wavelength of light that can cause photoelectron emission from this substance is approximately:
- A400 nm
- B220 nm
- C540 nm
- D310 nm
The velocity of the photoelectron emitted in the photoelectric effect depends only on:
- Athe frequency of incident light
- Bthe frequency and intensity of incident light
- Cthe frequency and intensity of incident light and the frequency of incident light
- ✓the wavelength of the incident light
Answer: D.
View full solution →Two coherent monochromatic light sources are located at two vertices of an equilateral triangle. If the intensity due to each of the sources independently is $1 Wm ^{-2}$ at the third vertex, the resultant intensity due to both the sources at that point (i.e., at the third vertex) is: (in $Wm ^{-2}$ )
- ✓4
- B$\sqrt{2}$
- C2
- D$0$
Answer: A.
View full solution →Identify the structure of aniline yellow.
- ✓
- B
- C
- D
Answer: A.
View full solution →During the fusion of an organic compound with sodium metal, nitrogen of the organic compound is converted into
- ANaCN
- B$NaNH _2$
- C$NaNO _2$
- DNaNC
Consider $Cu ^{2+} \mid Cu$ electrode. What is the electrode potential if $0.01 M Cu ^{2+}$ solution is used?
$
\left(T=298 K, E_{\frac{C u^{2+}}{C u}}^o=0.34 V\right)
$
$
\left(T=298 K, E_{\frac{C u^{2+}}{C u}}^o=0.34 V\right)
$
- A0.399 V
- B0.281 V
- C0.591 V
- D0.222 V
In a set of reactions, m -bromobenzoic acid gave product D. Identify product D.
- A
- B
- C
- D
Which of the following statement is not true about sucrose?
- AOn hydrolysis, it produces glucose and fructose
- BIt is also named as invert sugar
- CThe glycosidic linkage is present between $C _1$ of $\alpha$-glucose and $C _1$ of $\beta$-fructose
- DIt is a non-reducing sugar
The process of growth is determined by:
- ✓Increase in size and dry weight
- BIncrease in weight only
- CIncrease in dry weight
- DIncrease in size
Answer: A.
View full solution →In which of the following steps of Glycolysis a water molecule is released?
- A2-Phosphoenol pyruvate $\longrightarrow$ Pyruvic acid
- B2-Phosphoglycerate $\longrightarrow$ Phosphoenol pyruvate
- CFructose-6-phosphate $\longrightarrow$ Fructose 1, 6-diphosphate
- D2-Phosphoglycerate $\longrightarrow$ Phosphoenol pyruvate
The conversion of PGA into glyceraldehyde 3-phosphate occurs during
- Aregeneration
- Bphotorespiration
- Ccarboxylation
- Dreduction
$\text{NADPH} _2$ is generated through ____________ pigment systems:
- AMagnesium
- ✓Both Photosystem-I and Photosystem-II
- CPhotosystem-I
- DPhotosystem-II
Answer: B.
View full solution →Given below are two reactions $( P$ and Q $)$ representing photosynthesis in organisms - A and B respectively.
Reaction P : $CO _2+2 H _2 O \longrightarrow\left[ CH _2 O \right]+ H _2 O + O _2$
Reaction Q : $CO _2+2 H _2 S \longrightarrow\left[ CH _2 O \right]+ H _2 O +2 S$
Select the statement that can be concluded about these organisms.
a. Organism A performs anoxygenic photosynthesis whereas organism $B$ performs oxygenic photosynthesis.
b. Organism A could be a cyanobacterium and organism B could be a plant.
c. Organism A could be a plant and organism B could be a photosynthetic bacterium.
d. Both (a) and (c)
Reaction P : $CO _2+2 H _2 O \longrightarrow\left[ CH _2 O \right]+ H _2 O + O _2$
Reaction Q : $CO _2+2 H _2 S \longrightarrow\left[ CH _2 O \right]+ H _2 O +2 S$
Select the statement that can be concluded about these organisms.
a. Organism A performs anoxygenic photosynthesis whereas organism $B$ performs oxygenic photosynthesis.
b. Organism A could be a cyanobacterium and organism B could be a plant.
c. Organism A could be a plant and organism B could be a photosynthetic bacterium.
d. Both (a) and (c)
- AStatement (c) is correct.
- BStatement (a) is correct.
- CStatement (d) is correct.
- DStatement (b) is correct.
Choose the correct option regarding retrovirus:
- AA dsRNA virus
- BA DNA virus that can synthesise RNA during infection
- CAn RNA virus that can synthesise DNA during infection
- DA ssDNA virus
The two polypeptides of human insulin are linked together by:
- AHydrogen bonds
- BCovalent bond
- CPhosphodiester bond
- DDisulphide bridges
Match Column I with Column II and select the correct answer from the given codes.
| Column I | Column II |
| A. Transformation | (i) Sequences cut by restriction enzymes |
| B. Recognition site | (ii) Process by which DNA fragments are separated based on their size |
| C. Gel electrophoresis | (iii) Plasmid DNA that has incorporated human DNA |
| D. Recombinant DNA | (iv) Process by which bacteria take up pieces of DNA from the environment |
- AA - (iii), B - (ii), C - (i), D - (iv)
- BA - (iv), B - (i), C - (ii), D - (iii)
- CA - (i), B - (iv), C - (ii), D - (iii)
- DA - (iii), B - (i), C - (ii), D - (iv)
Which of the following steps are catalysed by Taq polymerase in a PCR reaction?
- AAll of these
- BDenaturation of template DNA
- CAnnealing of primers to template DNA
- ✓Extension of primer end on the template DNA
Answer: D.
View full solution →During heat shock to the bacterium, the temperature used for giving thermal shock is:
- A$100^{\circ} \text{C}$
- B$-196^{\circ} \text{C}$
- C$82^{\circ} \text{C}$
- D$42^{\circ} \text{C}$
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