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Chemistry · PYQ NEET UG 2022
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Chemistry · PYQ NEET UG 2022
Which one is NOT correct mathematical equation for Dalton’s Law of partial pressure? Here \( p \) = total pressure of gaseous mixture
Read answer →Chemistry · PYQ NEET UG 2022
Find the emf of the cell in which the following reaction takes place at \( 298\text{ K} \). \( \text{Ni(s)} + 2\text{Ag}^+ (0.001\text{ M}) \rightarrow \text{Ni}^{2+} (0.001\text{ M}) + 2\text{Ag(s)} \) (Given that \( E^\circ_{\text{cell}} = 10.5\text{ V} \), \( \frac{2.303RT}{F} = 0.059 \) at \( 298\text{ K} \))
Read answer →Chemistry · PYQ NEET UG 2022
The pollution due to oxides of sulphur gets enhanced due to the presence of: (i) particulate matter (ii) ozone (iii) hydrocarbons (iv) hydrogen peroxide Choose the most appropriate answer from the options given below:
Read answer →Chemistry · PYQ NEET UG 2022
Copper crystallises in fcc unit cell with cell edge length of \( 3.608 \times 10^{-8}\text{ cm} \). The density of copper is \( 8.92\text{ g cm}^{-3} \). Calculate the atomic mass of copper.
Read answer →Chemistry · PYQ NEET UG 2022
Given below are two statements: Statement I: The boiling points of the following hydrides of group 16 elements increases in the order: \( H_2O < H_2S < H_2Se < H_2Te \). Statement II: The boiling points of these hydrides increase with increase in molar mass. In the light of the above statements, choose the most appropriate answer from the options given below:
Read answer →Chemistry · PYQ NEET UG 2022
Given below are two statements: Statement I: In Lucas test, primary, secondary and tertiary alcohols are distinguished on the basis of their reactivity with conc. \( \text{HCl} + \text{ZnCl}_2 \) known as Lucas reagent. Statement II: Primary alcohols are most reactive and immediately produce turbidity at room temperature on reaction with Lucas reagent. In the light of the above statements, choose the most appropriate answer from the options given below:
Read answer →Chemistry · PYQ NEET UG 2022
A \( 10.0\text{ L} \) flask contains \( 64\text{ g} \) of oxygen at \( 27\text{ \r{0}C} \). (Assume \( \text{O}_2 \) gas is behaving ideally). The pressure inside the flask in bar is: (Given \( R = 0.0831\text{ L bar K}^{-1}\text{ mol}^{-1} \))
Read answer →Chemistry · PYQ NEET UG 2022
Which of the following is suitable to synthesize chlorobenzene?
Read answer →Chemistry · PYQ NEET UG 2022
Which amongst the following is INCORRECT statement? Which of the above statements is/are NOT correct?
Read answer →Chemistry · PYQ NEET UG 2022
Which statement regarding polymers is NOT correct? Which of the above statements is/are NOT correct?
Read answer →Chemistry · PYQ NEET UG 2022
In the neutral or faintly alkaline medium, \( \text{KMnO}_4 \) oxidises iodide into iodate. The change in oxidation state of manganese in this reaction is from ________.
Read answer →Chemistry · PYQ NEET UG 2022
At 298 K, the standard electrode potentials of \( \text{Cu}^{2+}/\text{Cu} \), \( \text{Zn}^{2+}/\text{Zn} \), \( \text{Fe}^{2+}/\text{Fe} \) and \( \text{Ag}^+/\text{Ag} \) are \( 0.34\text{ V} \), \( -0.76\text{ V} \), \( -0.44\text{ V} \) and \( 0.80\text{ V} \), respectively. On the basis of standard electrode potential, predict which of the following reaction CANNOT occur?
Read answer →Chemistry · PYQ NEET UG 2022
What mass of \( 95\% \) pure \( \text{CaCO}_3 \) will be required to neutralise \( 50\text{ mL} \) of \( 0.5\text{ M HCl} \) solution according to the following reaction? \( \text{CaCO}_{3(s)} + 2\text{HCl}_{(aq)} \rightarrow \text{CaCl}_{2(aq)} + \text{CO}_{2(g)} + 2\text{H}_2\text{O}_{(l)} \) [Calculate upto second place of decimal point]
Read answer →Chemistry · PYQ NEET UG 2022
Given below are two statements: Statement I: In the coagulation of a negative sol, the flocculating power of the three given ions is in the order – \( \text{Al}^{3+} > \text{Ba}^{2+} > \text{Na}^+ \) Statement II: In the coagulation of a positive sol, the flocculating power of the three given salts is in the order – \( \text{NaCl} > \text{Na}_2\text{SO}_4 > \text{Na}_3\text{PO}_4 \) In the light of the above statements, choose the most appropriate answer from the options given below:
Read answer →Chemistry · PYQ NEET UG 2022
\( RMgX + CO_2 \xrightarrow[dry\ ether]{} Y \xrightarrow{H_3O^+} RCOOH \) What is Y in the above reaction?
Read answer →Chemistry · PYQ NEET UG 2022
\( 3\text{O}_{2\text{(g)}} \rightleftharpoons 2\text{O}_{3\text{(g)}} \) for the above reaction at \( 298\text{ K} \), \( K_c \) is found to be \( 3.0 \times 10^{-59} \). If the concentration of \( \text{O}_2 \) at equilibrium is \( 0.040\text{ M} \) then concentration of \( \text{O}_3 \) in M is ________.
Read answer →Chemistry · PYQ NEET UG 2022
The INCORRECT statement regarding chirality is:
Read answer →Chemistry · PYQ NEET UG 2022
Compound X on reaction with \( \text{O}_3 \) followed by \( \text{Zn}/\text{H}_2\text{O} \) gives formaldehyde and 2-methylpropanal as products. The compound X is:
Read answer →Chemistry · PYQ NEET UG 2022
The product formed from the following reaction sequence is \( \text{C}\text{N} \xrightarrow[{(ii) \text{NaNO}_2 + \text{HCl}}{(i) \text{LiAlH}_4, \text{H}_2\text{O}}]{\text{(iii) } \text{H}_2\text{O}} \)
Read answer →Chemistry · PYQ NEET UG 2022
The INCORRECT statement regarding enzymes is:
Read answer →Chemistry · PYQ NEET UG 2022
Match List-I with List-II: List-I (Hydrides) List-II (Nature) i \( MgH_2 \) a Electron precise ii \( GeH_4 \) b Electron deficient iii \( B_2H_6 \) c Electron rich iv \( HF \) d Ionic Choose the CORRECT answer from the options given below:
Read answer →Chemistry · PYQ NEET UG 2022
Match List-I with List-II: List-I (Drug class) List-II (Drug molecule) i Antacids a Salvarsan ii Antihistamines b Morphine iii Analgesics c Cimetidine iv Antimicrobials d Seldane Choose the CORRECT answer from the options given below:
Read answer →Chemistry · PYQ NEET UG 2022
