OnlineCBT
Chemistry · PYQ NEET UG 2018
Practice questions & answers
Find a question, read its answer and explanation, then practise related questions.
Chemistry PYQ NEET UG 2018 · Clear filters
45 questions
Chemistry · PYQ NEET UG 2018
In the structure of \( \text{ClF}_3 \), the number of lone pairs of electrons on central atom \( \text{Cl} \) is
Read answer →Chemistry · PYQ NEET UG 2018
The CORRECT difference between first- and second-order reactions is that
Read answer →Chemistry · PYQ NEET UG 2018
Which of the following compounds can form a zwitter ion?
Read answer →Chemistry · PYQ NEET UG 2018
The solubility of \( \mathrm{BaSO_4} \) in water is \( 2.42 \times 10^{-3} \text{ g L}^{-1} \) at \( 298 \text{ K} \). The value of its solubility product \( (\mathrm{K_{sp}}) \) will be (Given : molar mass of \( \mathrm{BaSO_4} = 233 \text{ g mol}^{-1} \))
Read answer →Chemistry · PYQ NEET UG 2018
Which of the following is correct with respect to \( -I \) effect of the substituents? \( (R = \text{alkyl}) \)
Read answer →Chemistry · PYQ NEET UG 2018
Consider the change in oxidation state of bromine corresponding to different emf values as shown in the diagram below: \( \mathrm{BrO_4^- \xrightarrow{1.82\text{ V}} BrO_3^- \xrightarrow{1.5\text{ V}} HBrO} \) \( \mathrm{BrO_3^- \xrightarrow{1.595\text{ V}} Br_2 \xrightarrow{1.0652\text{ V}} Br^-} \)\nThen the species undergoing disproportionation is
Read answer →Chemistry · PYQ NEET UG 2018
The compound A on treatment with Na gives B, and with \( \mathrm{PCl_5} \) gives C. B and C react together to give diethyl ether. A, B and C are in the order of
Read answer →Chemistry · PYQ NEET UG 2018
The geometry and magnetic behaviour of the complex \( [\mathrm{Ni}(\mathrm{CO})_{4}] \) are
Read answer →Chemistry · PYQ NEET UG 2018
Regarding cross-linked or network polymers, which of the following statements is INCORRECT?
Read answer →Chemistry · PYQ NEET UG 2018
The difference between amylose and amylopectin is
Read answer →Chemistry · PYQ NEET UG 2018
Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms. (A) is
Read answer →Chemistry · PYQ NEET UG 2018
Which one of the following conditions will favour maximum formation of the product in the reaction? \( \mathrm{A}_{2(\mathrm{g})}+\mathrm{B}_{2(\mathrm{g})} \rightleftharpoons \mathrm{X}_{2(\mathrm{g})} ; \Delta_{r} \mathrm{H}=-x \mathrm{kJ} \)
Read answer →Chemistry · PYQ NEET UG 2018
Which of the following statements is NOT true for halogens?
Read answer →Chemistry · PYQ NEET UG 2018
Considering Ellingham diagram, which of the following metals can be used to reduce alumina?
Read answer →Chemistry · PYQ NEET UG 2018
For the redox reaction, \( \mathrm{MnO}_{4}^{-}+\mathrm{C}_{2} \mathrm{O}_{4}^{2-}+\mathrm{H}^{+} \longrightarrow \mathrm{Mn}^{2+}+\mathrm{CO}_{2}+\mathrm{H}_{2}\mathrm{O} \), the CORRECT coefficients of the reactants for the balanced reaction are
Read answer →Chemistry · PYQ NEET UG 2018
The CORRECT order of N-compounds in its decreasing order of oxidation states is _________.
Read answer →Chemistry · PYQ NEET UG 2018
Which one is a WRONG statement?
Read answer →Chemistry · PYQ NEET UG 2018
Consider the following species: \( \text{CN}^+, \text{CN}^-, \text{NO}, \text{CN} \) Which one of these will have the highest bond order?
Read answer →Chemistry · PYQ NEET UG 2018
The correction factor 'a' to the ideal gas equation corresponds to ______.
Read answer →Chemistry · PYQ NEET UG 2018
In which case is the number of molecules of water maximum?
Read answer →Chemistry · PYQ NEET UG 2018
Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is \( 1\text{s}^2 2\text{s}^2 2\text{p}^3 \), the simplest formula for this compound is
Read answer →Chemistry · PYQ NEET UG 2018
Which one of the following elements is unable to form \( \text{MF}_6^{3-} \) ion?
Read answer →Chemistry · PYQ NEET UG 2018
