NEET 2025

159 Questions • 180 Minutes • 2025

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Q61
For the reaction A(g) $\rightleftharpoons$ 2B(g), the backward reaction rate constant is higher than the forward reaction rate constant by a factor of 2500, at 1000 K. [Given: R= 0.0831 L atm mol$^{-1}$ K$^{-1}$] K$_P$ for the reaction at 1000 K is
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Q62
Given below are two statements: Statement I: Benzenediazonium salt is prepared by the reaction of aniline with nitrous acid at 273-278 K. It decomposes easily in the dry state. Statement II: Insertion of iodine into the benzene ring is difficult and hence iodobenzene is prepared through the reaction of benzenediazonium salt with KI. In the light of the above statements, choose the most appropriate answer from the options given below:
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Q63
How many products (including stereoisomers) are expected from monochlorination of the following compound? $(CH_3)_2CH-CH_2-CH_3$
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Q64
Which of the following aqueous solution will exhibit highest boiling point?
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Q65
Match List-I with List-II. [table] List-I | List-II ; A. Haber process | I. Fe catalyst ; B. Wacker oxidation | II. PdCl$_2$ ; C. Wilkinson catalyst | III. [(PPh$_3$)$_3$RhCl] ; D. Ziegler catalyst | IV. TiCl$_4$ with Al(CH$_3$)$_3$ [/table] Choose the correct answer from the options given below:
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Q66
5 moles of liquid X and 10 moles of liquid Y make a solution having a vapour pressure of 70 torr. The vapour pressures of pure X and Y are 63 torr and 78 torr respectively. Which of the following is true regarding the described solution?
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Q67
Sugar ‘X’ A. is found in honey. B. is a keto sugar. C. exists in α and β – anomeric forms. D. is laevorotatory. ‘X’ is:
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Q68
The standard heat of formation, in kcal/mol of Ba$^{2+}$ is: [Given : standard heat of formation of SO$_4^{2-}$ ion (aq)= –216 kcal/mol, standard heat of crystallization of BaSO$_4$(s) = –4.5 kcal/mol, standard heat of formation of BaSO$_4$(s) = –349 kcal/mol]
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Q69
Total number of possible isomers (both structural as well as stereoisomers) of cyclic ethers of molecular formula C$_4$H$_8$O is:
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Q70
Identify the correct orders against the property mentioned A. H$_2$O > NH$_3$ > CHCl$_3$ - dipole moment B. XeF$_4$ > XeO$_3$ > XeF$_2$ – number of lone pairs on central atom C. O–H > C–H > N–O – bond length D. N$_2$ > O$_2$ > H$_2$ – bond enthalpy Choose the correct answer from the options given below:
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Q71
Higher yield of NO in N$_2$(g) + O$_2$ $\rightleftharpoons$ 2NO(g) can be obtained at [$\Delta$H of the reaction = + 180.7 kJ mol$^{-1}$] A. higher temperature B. lower temperature C. higher concentration of N$_2$ D. higher concentration of O$_2$ Choose the correct answer from the options given below:
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Q72
If the rate constant of a reaction is 0.03 s$^{-1}$, how much time does it take for 7.2 mol L$^{-1}$ concentration of the reactant to get reduced to 0.9 mol L$^{-1}$? (Given : log 2 = 0.301)
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Q73
Which one of the following reactions does NOT belong to “Lassaigne’s test”?
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Q74
The complex II of mitochondrial electron transport chain is also known as
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Q75
Polymerase chain reaction (PCR) amplifies DNA following the equation.
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Q76
What are the potential drawbacks in adoption of the IVF method? A. High fatality risk to mother B. Expensive instruments and reagents C. Husband/wife necessary for being donors D. Less adoption of orphans E. Not available in India F. Possibility that the early embryo does not survive Choose the correct answer from the options given below:
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Q77
What is the name of the blood vessel that carries deoxygenated blood from the body to the heart in a frog?
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Q78
Which one of the following statements refers to Reductionist Biology?
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Q79
Given below are two statements: Statement I: In the RNA world, RNA is considered the first genetic material evolved to carry out essential life processes. RNA acts as a genetic material and also as a catalyst for some important biochemical reactions in living systems. Being reactive, RNA is unstable. Statement II: DNA evolved from RNA and is a more stable genetic material. Its double helical strands being complementary, resist changes by evolving repairing mechanism. In the light of the above statements, choose the most appropriate answer from the options given below:
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Q80
Epiphytes that are growing on a mango branch is an example of which of the following?
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Paper Info
  • Exam: NEET
  • Year: 2025
  • Questions: 159
  • Duration: 180 mins
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