NEET 2021

184 Questions • 180 Minutes • 2021

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An organic compound contains 78% (by wt.) carbon and remaining percentage of hydrogen. The right option for the empirical formula of this compound is: [Atomic wt. of C is 12, H is 1]

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A particular station of All India Radio, New Delhi, broadcasts on a frequency of 1,368 kHz (kilohertz). The wavelength of the electromagnetic radiation emitted by the transmitter is: [speed of light, $c = 3.0 \times 10^8\ ms^{-1}$]

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$BF_3$ is planar and electron deficient compound. Hybridization and number of electrons around the central atom, respectively are:

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Match List-I with List-II. [table] List-I | List-II ; (A) $PCl_5$ | (i) Square pyramidal ; (B) $SF_6$ | (ii) Trigonal planar ; (C) $BrF_5$ | (iii) Octahedral ; (D) $BF_3$ | (iv) Trigonal bipyramidal [/table] Choose the correct answer from the options given below.

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Choose the correct option for graphical representation of Boyle's law, which shows a graph of pressure vs. volume of a gas at different temperatures.

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Which one among the following is the correct option for right relationship between $C_P$ and $C_V$ for one mole of ideal gas?

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The $pK_b$ of dimethylamine and $pK_a$ of acetic acid are 3.27 and 4.77 respectively at T(K). The correct option for the pH of dimethylammonium acetate solution is:

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Which of the following reactions is the metal displacement reaction? Choose the right option.

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Tritium, a radioactive isotope of hydrogen, emits which of the following particles.

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The structures of beryllium chloride in solid state and vapour phase, are:

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Among the following alkaline earth metal halides, one which is covalent and soluble in organic solvents is:

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The compound which shows metamerism is:

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The correct structure of 2,6-Dimethyl-dec-4-ene is:

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Dihedral angle of least stable conformer of ethane is:

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Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are

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The correct option for the number of body centred unit cells in all 14 types of Bravais lattice unit cells is:

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The following solutions were prepared by dissolving 10 g of glucose ($C_6H_{12}O_6$) in 250 ml of water ($P_1$), 10 g of urea ($CH_4N_2O$) in 250 ml of water ($P_2$) and 10 g of sucrose ($C_{12}H_{22}O_{11}$) in 250 ml of water ($P_3$). The right option for the decreasing order of osmotic pressure of these solutions is:

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The molar conductance of NaCl, HCl and $CH_3COONa$ at infinite dilution are 126.45, 426.16 and 91.0 S $cm^2$ $mol^{-1}$ respectively. The molar conductance of $CH_3COOH$ at infinite dilution is. Choose the right option for your answer.

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For a reaction $A \rightarrow B$, enthalpy of reaction is -4.2 kJ $mol^{-1}$ and enthalpy of activation is 9.6 kJ $mol^{-1}$. The correct potential energy profile for the reaction is shown in option.

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The right option for the statement "Tyndall effect is exhibited by", is:

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Paper Info

Exam: NEET
Year: 2021
Questions: 184
Duration: 180 mins

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