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Chemistry · PYQ NEET UG 2021
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Chemistry · PYQ NEET UG 2021
From the following pairs of ions which one is not an isoelectronic pair?
Read answer →Chemistry · PYQ NEET UG 2021
अभिक्रिया \( \text{A} \rightarrow \text{B} \) के लिए, अभिक्रिया की एन्थैल्पी \( -4.2 \text{ kJ mol}^{-1} \) है और सक्रियण एन्थैल्पी \( 9.6 \text{ kJ mol}^{-1} \) है। अभिक्रिया के लिए सही स्थितिज ऊर्जा आरेख किस विकल्प में दर्शाया गया है?
Read answer →Chemistry · PYQ NEET UG 2021
Dihedral angle of the least stable conformer of ethane is _______.
Read answer →Chemistry · PYQ NEET UG 2021
Which of the following reactions is the metal displacement reaction? Choose the right option. Which of the above statements is/are correct?
Read answer →Chemistry · PYQ NEET UG 2021
Given below are two statements: Statement I: Aspirin and paracetamol belong to the class of narcotic analgesics. Statement II: Morphine and heroin are non-narcotic analgesics. In the light of the above statements, choose the correct answer from the options given below.
Read answer →Chemistry · PYQ NEET UG 2021
The major product formed in dehydrohalogenation reaction of 2-bromopentane is pent-2-ene. This product formation is based on?
Read answer →Chemistry · PYQ NEET UG 2021
Match List-I with List-II: List-I List-II i \( \text{PCl}_5 \) a Square pyramidal ii \( \text{SF}_6 \) b Trigonal planar iii \( \text{BrF}_5 \) c Octahedral iv \( \text{BF}_3 \) d Trigonal bipyramidal Choose the CORRECT answer from the options given below.
Read answer →Chemistry · PYQ NEET UG 2021
Which one among the following is the CORRECT option for right relationship between \( \text{C}_\text{P} \) and \( \text{C}_\text{V} \) for one mole of ideal gas? Which of the above statements is/are correct?
Read answer →Chemistry · PYQ NEET UG 2021
The maximum temperature that can be achieved in blast furnace is _______.
Read answer →Chemistry · PYQ NEET UG 2021
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]
Read answer →Chemistry · PYQ NEET UG 2021
Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature?
Read answer →Chemistry · PYQ NEET UG 2021
The CORRECT option for the value of vapour pressure of a solution at \( 45\text{ }^\circ\text{C} \) with benzene to octane in molar ratio 3:2 is _______. [At \( 45\text{ }^\circ\text{C} \) vapour pressure of benzene is \( 280\text{ mm of Hg} \) and that of octane is \( 420\text{ mm of Hg} \). Assume ideal gas]
Read answer →Chemistry · PYQ NEET UG 2021
Ethylene diaminetetraacetate (EDTA) ion is _______.
Read answer →Chemistry · PYQ NEET UG 2021
The \( \text{pK}_\text{b} \) of dimethylamine and \( \text{pK}_\text{a} \) of acetic acid are 3.27 and 4.77 respectively at \( T \text{ (K)} \). The CORRECT option for the pH of dimethylammonium acetate solution is ______.
Read answer →Chemistry · PYQ NEET UG 2021
\( \text{BF}_3 \) is planar and electron deficient compound. Hybridization and the number of electrons around the central atom respectively are _______.
Read answer →Chemistry · PYQ NEET UG 2021
In which one of the following arrangements the given sequence is NOT strictly according to the properties indicated against it?
Read answer →Chemistry · PYQ NEET UG 2021
बॉइल के नियम के ग्राफ़ीय निरूपण के लिए सही विकल्प चुनिए, जो विभिन्न तापमानों पर गैस के दाब बनाम आयतन का ग्राफ़ दर्शाता है।
Read answer →Chemistry · PYQ NEET UG 2021
Choose the right option for the statement "Tyndall effect is exhibited by". Which of the above statements is/are correct?
Read answer →Chemistry · PYQ NEET UG 2021
What is the IUPAC name of the organic compound formed in the following chemical reaction? Acetone \( \xrightarrow[{(ii) \text{ H}_2\text{O}, \text{H}^+}]{{(i) \text{ C}_2\text{H}_5\text{MgBr, dry Ether}}} \text{ Product} \)
Read answer →Chemistry · PYQ NEET UG 2021
The CORRECT sequence of bond enthalpy of 'C–X' bond is _______.
Read answer →Chemistry · PYQ NEET UG 2021
The CORRECT option for the number of body centred unit cells in all 14 types of Bravais lattice unit cells is_______.
Read answer →Chemistry · PYQ NEET UG 2021
Identify the compound that will react with Hinsberg's reagent to give a solid which dissolves in alkali.
Read answer →Chemistry · PYQ NEET UG 2021
