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Chemistry · PYQ NEET UG 2019(2)
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Chemistry · PYQ NEET UG 2019(2)
The density of \( 2 \) \( \mathrm{M} \) aqueous solution of \( \mathrm{NaOH} \) is \( 1.28 \) \( \mathrm{g/cm^3} \). The molality of the solution is [Given that molecular mass of \( \mathrm{NaOH} = 40 \) \( \mathrm{g\,mol^{-1}} \)]
Read answer →Chemistry · PYQ NEET UG 2019(2)
In the following reaction, \( \text{H}_3\text{C}-\text{C}\equiv\text{CH} \xrightarrow[873\text{ K}]{\text{red hot iron tube}} \text{A} \). The number of sigma \( (\sigma) \) bonds present in the product A, is
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In water saturated air, the mole fraction of water vapour is 0.02. If the total pressure of the saturated air is 1.2 atm, the partial pressure of dry air is
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The most stable carbocation, among the following is
Read answer →Chemistry · PYQ NEET UG 2019(2)
Formula of nickel oxide with metal deficiency defect in its crystal is \( \mathrm{Ni_{0.98}O} \). The crystal contains \( \mathrm{Ni^{2+}} \) and \( \mathrm{Ni^{3+}} \) ions. The fraction of nickel existing as \( \mathrm{Ni^{2+}} \) ions in the crystal is
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In hydrogen atom, the de Broglie wavelength of an electron in the second Bohr orbit is ________. [Given that Bohr radius, \( a_0 = 52.9 \text{ pm} \)]
Read answer →Chemistry · PYQ NEET UG 2019(2)
When vapours of a secondary alcohol are passed over heated copper at \( 573 \) \( \mathrm{K} \), the product formed is
Read answer →Chemistry · PYQ NEET UG 2019(2)
निम्नलिखित में से वह जलअपघटन अभिक्रिया कौन सी है जो सबसे धीमी गति से होती है?
Read answer →Chemistry · PYQ NEET UG 2019(2)
The number of hydrogen bonded water molecule(s) associated with \( CuSO_4.5H_2O \) is
Read answer →Chemistry · PYQ NEET UG 2019(2)
Which of the following statements is CORRECT regarding a solution of two components A and B exhibiting positive deviation from ideal behaviour?
Read answer →Chemistry · PYQ NEET UG 2019(2)
The correct option representing a Freundlich adsorption isotherm is
Read answer →Chemistry · PYQ NEET UG 2019(2)
The polymer that is used as a substitute for wool in making commercial fibres is
Read answer →Chemistry · PYQ NEET UG 2019(2)
वह अभिक्रिया कौन सी है जो मुख्य उत्पाद के रूप में बेन्जोइक अम्ल नहीं देती है?
Read answer →Chemistry · PYQ NEET UG 2019(2)
Reversible expansion of an ideal gas under isothermal and adiabatic conditions are as shown in the figure. Which of the following options is INCORRECT?
Read answer →Chemistry · PYQ NEET UG 2019(2)
Which of the following compounds is used in cosmetic surgery?
Read answer →Chemistry · PYQ NEET UG 2019(2)
Which of the following oxoacids of phosphorus has the strongest reducing property?
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The pH of \( 0.01 \text{ M NaOH}_{(aq)} \) solution will be
Read answer →Chemistry · PYQ NEET UG 2019(2)
A first order reaction has a rate constant of \( 2.303 \times 10^{-3} \text{ s}^{-1} \). The time required for 40 g of this reactant to reduce to 10 g will be [Given that \( \log_{10} 2 = 0.3010 \)]
Read answer →Chemistry · PYQ NEET UG 2019(2)
Which of the alkali metal chloride (MCl) forms its dihydrate salt (\( MCl.2H_2O \)) easily?
Read answer →Chemistry · PYQ NEET UG 2019(2)
Which of the following is paramagnetic?
Read answer →Chemistry · PYQ NEET UG 2019(2)
Orbital having 3 angular nodes and 3 total nodes is
Read answer →Chemistry · PYQ NEET UG 2019(2)
The standard electrode potential \( (E^0) \) values of \( \text{Al}^{3+}/\text{Al}, \text{Ag}^+/\text{Ag}, \text{K}^+/\text{K} \) and \( \text{Cr}^{3+}/\text{Cr} \) are \( -1.66 \text{ V}, 0.80 \text{ V}, -2.93 \text{ V} \) and \( -0.74 \text{ V} \), respectively. The CORRECT decreasing order of reducing power of the metal is
Read answer →Chemistry · PYQ NEET UG 2019(2)
