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Chemistry · PYQ NEET UG 2021
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Chemistry · PYQ NEET UG 2021
Tritium, a radioactive isotope of hydrogen emits which of the following particles?
Read answer →Chemistry · PYQ NEET UG 2021
The structures of beryllium chloride in solid state and vapour phase are _______.
Read answer →Chemistry · PYQ NEET UG 2021
Choose the CORRECT option for the total pressure (in atm) in a mixture of \( 4\text{ g O}_2 \) and \( 2\text{ g H}_2 \) confined in a total volume of one litre at \( 0\text{ }^\circ\text{C} \). [Given: \( R = 0.082\text{ L atm mol}^{-1}\text{ K}^{-1} \), \( T = 273\text{ K} \)]
Read answer →Chemistry · PYQ NEET UG 2021
Which one of the following polymers is prepared by addition polymerisation?
Read answer →Chemistry · PYQ NEET UG 2021
Among the following alkaline earth metal halides, one which is covalent and soluble in organic solvents is _______.
Read answer →Chemistry · PYQ NEET UG 2021
Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of _______.
Read answer →Chemistry · PYQ NEET UG 2021
The molar conductance of \( \text{NaCl} \), \( \text{HCl} \) and \( \text{CH}_3\text{COONa} \) at infinite dilution are \( 126.45 \), \( 426.16 \) and \( 91.0 \text{ S cm}^2 \text{ mol}^{-1} \) respectively. The molar conductance of \( \text{CH}_3\text{COOH} \) at infinite dilution is. Choose the right option for answer. Which of the above statements is/are correct?
Read answer →Chemistry · PYQ NEET UG 2021
Match List-I with List-II: List-I List-II i \( \text{C}_6\text{H}_6 \xrightarrow[\text{Anhyd. }\text{AlCl}_3]{\text{CO, HCl}} \text{C}_6\text{H}_5\text{CHO} \) a Hell-Volhard-Zelinsky reaction ii \( \text{R} - \text{C} - \text{CH}_3 + \text{NaOX} \longrightarrow \text{R} - \text{CH}_2 - \text{OH} + \text{R}'\text{COOH} \) b Gattermann-Koch reaction iii \( \text{R} - \text{CH}_2 - \text{OH} + \text{R}'\text{COOH} \xrightarrow{\text{Conc. H}_2\text{SO}_4} \text{Ester} \) c Haloform reaction iv \( \text{R} - \text{CH}_2\text{COOH} \xrightarrow[\text{(ii) }\text{H}_2\text{O}]{\text{(i) X}_2/\text{Red P}} \text{R} - \text{CH(X)}\text{COOH} \) d Esterification Choose the CORRECT answer from the options given below.
Read answer →Chemistry · PYQ NEET UG 2021
For irreversible expansion of an ideal gas under isothermal condition, the correct option is _______.
Read answer →Chemistry · PYQ NEET UG 2021
2,6-डाइमेथिल-डेल-4-ईन (2,6-dimethyl-dec-4-ene) की सही संरचना है _______।
Read answer →Chemistry · PYQ NEET UG 2021
Match List-I with List-II: List-I List-II i \( [\mathrm{Fe}(\mathrm{CN})_{6}]^{3-} \) a \( 5.92\text{ BM} \) ii \( [\mathrm{Fe}(\mathrm{H}_{2}\mathrm{O})_{6}]^{3+} \) b \( 0\text{ BM} \) iii \( [\mathrm{Fe}(\mathrm{CN})_{6}]^{4-} \) c \( 4.90\text{ BM} \) iv \( [\mathrm{Fe}(\mathrm{H}_{2}\mathrm{O})_{6}]^{2+} \) d \( 1.73\text{ BM} \) Choose the CORRECT answer from the options given below.
Read answer →Chemistry · PYQ NEET UG 2021
The slope of Arrhenius plot \( \ln k \text{ v/s } \frac{1}{T} \) of first order reaction is \( -5 \times 10^{3}\text{ K} \). The value of \( E_{a} \) of the reaction is _______. Choose the CORRECT option for answer. [Given: \( R = 8.314\text{ J K}^{-1}\text{ mol}^{-1} \)]
Read answer →Chemistry · PYQ NEET UG 2021
Match List-I with List-II: List-I List-II i \( 2\text{SO}_{2(g)} + \text{O}_{2(g)} \longrightarrow 2\text{SO}_{3(g)} \) a Acid rain ii \( \text{HOCl}_{(g)} \xrightarrow{h\nu} \dot{\text{O}}\text{H} + \dot{\text{C}}\text{l} \) b Smog iii \( \text{CaCO}_3 + \text{H}_2\text{SO}_4 \longrightarrow \text{CaSO}_4 + \text{H}_2\text{O} + \text{CO}_2 \) c Ozone depletion iv \( \text{NO}_{2(g)} \xrightarrow{h\nu} \text{NO}_{(g)} + \text{O}_{(g)} \) d Tropospheric pollution Choose the correct answer from the options given below.
Read answer →Chemistry · PYQ NEET UG 2021
\(\text{CH}_3\text{CH}_2\text{COO}^-\text{Na}^+ \xrightarrow[\text{Heat}]{\text{NaOH, ?}} \text{CH}_3\text{CH}_3 + \text{Na}_2\text{CO}_3 Consider the above reaction and identify the missing reagent/chemical. \)
Read answer →Chemistry · PYQ NEET UG 2021
Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell is _______.
Read answer →Chemistry · PYQ NEET UG 2021
A particular station of All India Radio, New Delhi broadcasts on a frequency of \( 1368\text{ kHz} \) (kilohertz). The wavelength of the electromagnetic radiation emitted by the transmitter is _______. [Speed of light, \( c = 3.0 \times 10^{8}\text{ m s}^{-1} \)]
Read answer →Chemistry · PYQ NEET UG 2021
The following solutions were prepared by dissolving 10 g of glucose \( (\text{C}_6\text{H}_{12}\text{O}_6) \) in 250 mL of water \( (\text{P}_1) \), 10 g of urea \( (\text{CH}_4\text{N}_2\text{O}) \) in 250 mL of water \( (\text{P}_2) \) and 10 g of sucrose \( (\text{C}_{12}\text{H}_{22}\text{O}_{11}) \) in 250 ml of water \( (\text{P}_3) \). The right option for the decreasing order of osmotic pressure of these solutions is _______.
Read answer →Chemistry · PYQ NEET UG 2021
The molar conductivity of \( 0.007\text{ M} \) acetic acid is \( 20\text{ S cm}^2\text{ mol}^{-1} \). What is the dissociation constant of acetic acid? Choose the CORRECT option. [Given: \( \Lambda_{\text{H}^+}^\circ = 350\text{ S cm}^2\text{ mol}^{-1} \), \( \Lambda_{\text{CH}_3\text{COO}^-}^\circ = 50\text{ S cm}^2\text{ mol}^{-1} \)]
Read answer →Chemistry · PYQ NEET UG 2021
The compound which shows metamerism is _______.
Read answer →Chemistry · PYQ NEET UG 2021
The major product of the following chemical reaction is _______.
Read answer →Chemistry · PYQ NEET UG 2021
The RBC deficiency is deficiency disease of _______.
Read answer →Chemistry · PYQ NEET UG 2021
Which of the following molecules is non-polar in nature?
Read answer →Chemistry · PYQ NEET UG 2021
