Recent questions tagged neet

In which of the following forms is iron absorbed by plants ?

asked Aug 21, 2018 by pady_1

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Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other ?

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Oxygen is not produced during photosyntheis by

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What is the role of $NAD^+$ in cellular respiration ?

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Which of the following is a secondary pollutant ?

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Niche is

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In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen ?

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World Ozone Day is celebrated on

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Natality refers to

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What type of ecological pyramid would be obtained with the following data ? Secondary consumer : 120 g Primary consumer : 60 g Primary producer : 10 g

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Identify the major products P, Q and R in the following sequence of reactions :

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Which of the following compounds can form a zwitterion ?

asked Aug 21, 2018 by pady_1

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Given var der Waals constant for $NH_3, H_2, O_2$ and $CO_2$are respectively 4.17, 0.244, 1.36 and 3.59, which one of the following gases is most easily liquefied ?

asked Aug 21, 2018 by pady_1

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The solubility of $BaSO_4$ in water is $2.42 \times 10^{-3} gL^{-1}$ at 298 K. The value of its solubility product $(K_{sp})$ will be (Given molar mass of $BaSO_4 = 233 \; g\;mol^{-1}$ )

asked Aug 21, 2018 by pady_1

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On which of the following properties does the coagulating power of an ion depend ?

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Following solutions were prepared by mixing different volumes of $NaOH$ and $HCl$ of different concentration : pH of which one of them will be equal to 1 ?

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The type of isomerism shown by the complex $[CoCl_2(en)_2]$ is

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Which one of the following ions exhibits d-d transition and paramagnetism as well ?

asked Aug 21, 2018 by pady_1

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The geometry and magnetic behaviour of the complex $[Ni(CO)_4]$ are

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Iron carbonyl, $Fe(CO)_5$ is

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Match the metal ions given in Column I and the spin magnetic moments of the ions given in Column II and assign the correct code :

asked Aug 21, 2018 by pady_1

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Compound A, $C_8 H_{10}O$, is found to react with $NaOI$ (produced by reacting Y with NaOH) and yield a yellow precipitate with characteristic smell. A and Y are respectively

asked Aug 21, 2018 by pady_1

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Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their

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In the reaction The electrophile involved is

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Which one of the following elements is unable to form $MF_6^{3-}$ ion ?

asked Aug 21, 2018 by pady_1

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The correct order of N-compounds in its decreasing order of oxidation states is

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In the structure of $CIF_3$, the number of Ione pair of electrons on central atom 'Cl' is

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The correct order of atomic radii in group 13 elements is

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Considering Ellingham diagram, which of the following metals can be used to reduce alumina ?

asked Aug 21, 2018 by pady_1

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Which of the following statements is not true for halogen ?

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Consider the following species : $CN^+, CN^-, NO$ and $CN$ Which one of these will have the highest bond order ?

asked Aug 21, 2018 by pady_1

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Which one is a wrong statement ?

asked Aug 21, 2018 by pady_1

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Iron exhibits bcc structure at room temperature. About $900^oC$, it transforms to fcc structure. The ratio of density of iron at room temperature to that at $900^oC$ (assuming molar mass and atomic radii of iron remains constant with temperature) is

asked Aug 21, 2018 by pady_1

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Magnesium reacts with an element (X) to form an ionic compoun. If the ground state electronic configuration of (X) is $1s^2 2s^2 2p^3$, the simplest formula for this compound is

asked Aug 21, 2018 by pady_1

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Which of the followng carbocations is expected to be most stable ?

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Which of the following molecules represents the order of hybridisation $sp^2, sp^2, sp, sp$ from left to right atoms?

asked Aug 21, 2018 by pady_1

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Which of the following is correct with reapect to -I effect of the substituents ? (R = alkyl)

asked Aug 21, 2018 by pady_1

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The correct difference between first and second order reactions is that

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In which case in number of molecules of water maximum ?

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Among $CaH_2, BeH_2, BaH_2$, the order of ionic character is

asked Aug 21, 2018 by pady_1

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Consider the change in oxidation state of Bromine corresponding to different emf values as shown in the diagram below : $BrO_4^- \xrightarrow{1.82 V} BrO_3^- \xrightarrow{1.5 V} HBrO \xrightarrow{1.595 V} Br_2 \xrightarrow{1.0652 V} Br^-$ Then the species undergoing disproportionation is

asked Aug 21, 2018 by pady_1

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Which one of the following conditions will favour maximum formation of the product in the reaction, $A_2 (g) + B_2 (g) \rightleftharpoons X_2 (g) \Delta_f H = - X\;kJ$ ?

asked Aug 21, 2018 by pady_1

2 answers

For the redox reaction $MnO_4^- + C_2O_4^{2-} + H^+ \to Mn^{2+} + CO_2 + H_2O$ The correct coefficients of the reactants for the balanced equation are

asked Aug 21, 2018 by pady_1

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The correction factor 'a' to the ideal gas equation corresponds to

asked Aug 21, 2018 by pady_1

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When initial concentration of the reactant is doubled, the half-life period of a zero order reaction

asked Aug 21, 2018 by pady_1

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The bond dissociation energies of $X_2, Y_2$ and $XY$ are in the ratio of 1 : 0.5 : 1. $\Delta H$ for the formation of $XY$ is $-200\; kJ \;mol^{-1}$. The bond dissociation energy of $X_2$ will be :

asked Aug 21, 2018 by pady_1

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Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?

asked Aug 21, 2018 by pady_1

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The compound $C_7H_8$ undergoes the following reactions: $C_7H_8 \xrightarrow{3Cl_2/ \Delta} A \xrightarrow{Br_2/Fe} B \xrightarrow{Zn/ HCl} C$ The product 'C' is

asked Aug 21, 2018 by pady_1

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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

asked Aug 21, 2018 by pady_1

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The compound A on treatment with Na gives B, and with $PCl_4$ gives C, B and C react together to give diethyl ether. A, B and C are in the order

asked Aug 21, 2018 by pady_1

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