Recent questions tagged 2015

Coconut water from a tender coconut is -

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Male gametophyte in angiosperms produces

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The DNA molecule to which the gene of interest is integrated for cloning is called -

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In which group of organisms the cell walls form two thin overlapping shells which fit together?

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A protoplast is a cell -

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The primary dentition in human differs from permanent dentition in not having one of the following type of teeth -

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Which of the following biomolecules does have a phosphodiester bond?

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The term "linkage" was coined by -

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Cell wall is absent in -

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Cellular organelles with membranes are -

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Ectopic pregnancies are referred to as-

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A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind?

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In which of the following interactions both partners are adversely affected ?

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Which of the following are not membrane bound ?

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Choose the wrong statement -

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In mammalian eye, the 'fovea' is the center of the visual field, where -

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In which of the following both pairs have correct combination? OPTION :

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Axile placentation is present in -

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The oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements is involved in this reaction?

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An association of individuals of different species living in the same habitat and having functional interactions is -

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Most animals that live in deep oceanic waters are -

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Which one of the following animals has two separate circulatory pathways ?

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Which of the following structures is not found in a prokaryotic cell ?

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Which one is a wrong statement ?

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Root pressure develops due to -

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In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with -

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Which is the correct order of increasing energy of the listed orbitals in the atom of titanium ? (At. no Z = 22)

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Which of the following reaction(s) can be used for the preparation of alkyl halides ? (I) $CH_3CH_2OH + HCl \xrightarrow{anh. ZnCl_2}$ (II) $CH_3CH_2OH + HCl \to $ (III) $(CH_3)_3COH + HCl \to $ (IV) $(CH_3)_2 CHOH + HCl \xrightarrow{anh. ZnCl_2}$

asked Aug 21, 2018 by pady_1

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Method by which Aniline cannot be prepared is -

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The oxidation of benzene by $V_2O_5$ in the presence of air produces -

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What is the mass of the precipitate formed when 50 mL of 16.9% solution of $AgNO_3$ is mixed with 50 mL of 5.8% NaCl solution ? (Ag = 107.3, N = 14, O = 16, Na = 23, Cl = 35.5)

asked Aug 21, 2018 by pady_1

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The variation of the boiling points of the hydrogen halides is in the order HF > HI > HBr > HCl. What explains the higher boiling point of hydrogen fluoride ?

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Number of possible isomers for the complex $[Co(en)_2Cl_2]Cl$ will be : (en = ethylene diamine)

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What is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed ?

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The rate constant of the reaction $A \to B$ is $0.6 \times 10^{-3} $mole per second. If the concentration of A is 5 M, then cencentration of B after 20 minutes is -

asked Aug 21, 2018 by pady_1

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In an $S_N1$ reaction on chiral centres, there is -

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Which one of the following esters gets hydrolysed most easily under alkaline conditions -

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Reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is -

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The sum of coordination number and oxidation number of the metal M in the complex $[M(en)_2(C_2O_4)]Cl$ (where en is ethylenediamine) is -

asked Aug 21, 2018 by pady_1

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The following reaction is known by the name -

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Two possible stero-structuers of $CH_3CHOH.COOH$, which are optically active, are called :

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The stability of +1 oxidation state among Al, Ga, In and Tl in creases in the sequence -

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The correct statement regarding defects in crystalline solids is

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What is the mole fraction of the solute in a 1.00 m aqueous solution ?

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20.0 g of magnesium carbonate sample decomposes on hating to give carbon dioxide and 8.0 g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample ?

asked Aug 21, 2018 by pady_1

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The heat of combustion of carbon to $CO_2$ is $–393.5\; kJ/mol$. The heat released upon formation of $35.2 \;g$ of $CO_2$ from carbon and oxygen gas is -

asked Aug 21, 2018 by pady_1

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Hybridization involved in complex the $[Ni(CN)_4]^{2–}$ is : (At. No. Ni = 28)

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A gas such as carbon monoxide would be most likely to obey the ideal gas law at :

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Which of the following statements is not correct for a nucleophile?

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