Recent questions tagged 2004

A self-fertilizing trihybrid plant forms :-

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In glycolysis, during oxidation electrons are removed by -

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In chloroplasts, chlorophyll is present in the :-

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Edible part of mango is :-

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Angiosperms have dominated the land flora primarily because of their -

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An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is :-

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Which of the following hormones is not a secretion product of human placenta -

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Injury to vagus nerve in humans is not likely to affect -

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Ovulation in the human female normally takes place during the menstrual cycle -

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The recessive genes located on X-chromosomes in humans are always-

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Viruses that infect bacteria, multiply and cause their lysis are called -

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Which one of the following hormones is a modified amino acid ?

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Extranuclear inheritance is a consequence of presence of genes in -

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In$ C_3$ plants, the first stable product of photosynthesis during the dark reaction is :-

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During transcription, if the nucleotide sequence of the DNA strand that is being coded is ATACG, then the nucleotide sequence in the mRNA would be -

asked Jul 24, 2018 by pady_1

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In Arthopoda, head and thorax are often fused to form cephalothorax, but in which one of the following classes, is the body divided into head, thorax and abdomen ?

asked Jul 24, 2018 by pady_1

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Anthesis is a phenomenon which refers to -

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What kind of evidence suggested that man is more closely related with chimpanzee than with other hominoid apes ?

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Age of fossils in the past was generally determined by radio-carbon method and other methods involving radioactive elements found in the rocks. More precise methods, which were used recently and led to the revision of the evolutionary periods for different groups of organisms includes -

asked Jul 24, 2018 by pady_1

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A normal woman, whose father was colour-blind is married to a normal man. The sons would be :-

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In transgenics expression of transgene in target tissue is determined by :-

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The richest sources of vitamin B12 are :-

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You are required to draw blood from a patient and to keep it in a test tube for analysis of b corpuscles and plasma. You are also provided with the following four types of test tubes. Which of them will you not use for the purpose?

asked Jul 24, 2018 by pady_1

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Blood analysis of a patient reveals an unusually high quantity of carboxy-haemoglobin content. Which of the following conclusions is most likely to be correct ? The patient has been inhaling polluted air containing unusually high content of -

asked Jul 24, 2018 by pady_1

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In $BrF_3$ molecule, the lone pairs occupy equatorial positions to minimize :-

asked Jul 24, 2018 by pady_1

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The work done during the expansion of a gas from a volume of $4 dm^{ 3}$ to $6 dm^{ 3}$ against a constant external pressure of 3 atm is :-

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A solid compound 'X' on heating gives $CO_2$ gas and a residue. The residue mixed with water forms 'Y'. On passing an excess of $CO_2$ through 'Y' in water, a clear solution, 'Z' is obtained. On boiling 'Z', compound 'X' is reformed. The compound 'X' is :-

asked Jul 24, 2018 by pady_1

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The molecular formula of diphenyl methane, is $C_{13}H_{12}$. How many structural isomers are possible when one of the hydrogens is replaced by a chlorine atom :-

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Which of the following will not form a yellow precipitate on heating with an alkaline solution of iodine :-

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Which one of the following statements about the zeolites is false :-

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The standard e.m.f. of a galvanic cell involving cell reaction with n = 2 is found to be 0.295 V a 25ºC. The equilibrium constant of the reaction would be :- (Given $F = 96500 \;C \;mol^{–1}$; $R = 8.314 JK^{–1} mol^{–1}$)

asked Jul 24, 2018 by pady_1

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Among K, Ca Fe and Zn, the element which can form more than one binary compound with chlorine is :-

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The solubility product of a sparingly soluble salt $AX_2$ is $3.2\times 10^{-11}$. Its solubility (in moles/litre) is:-

asked Jul 24, 2018 by pady_1

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Standard enthalpy and standard entropy changes for the oxidation of ammonia at 298 K are$-382.64KJ mol^{-1}$and $-145.6KJ^{-1} mol^{-1}$, respectively. Standard Gibbs energy change for the same reaction at 298 K is :-

asked Jul 24, 2018 by pady_1

2 answers

Chloropicrin is obtained by the reaction of

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Reaction of HBr with propene in the presence of peroxide gives :-

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The –OH group of an alcohol or the carboxylic acid can be replaced by – Cl, using :-

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Considering $H_2 O$ as a weak field ligand, the number of unpaired electrons in $[MN(H_2O_6)]^{2+}$ will be – (At. no. of Mn = 25)

asked Jul 24, 2018 by pady_1

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$CN^{-}$is a strong field ligand. This is due to the fact that :-

asked Jul 24, 2018 by pady_1

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Ionic radii are :-

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Considering entropy (S) as a thermodynamic parameter, the criterion for the spontaneity of any process is :-

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Which one of the following structures represents the peptide chain :-

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The rate of a first order reaction is $1.5\times 10^{-2} mol L^{-1} min^ {–1}$at 0.5 M concentration of the reactant. The half life of the reaction is :-

asked Jul 24, 2018 by pady_1

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Among the following, the pair in which the two species are not isostructural is :-

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Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere :-

asked Jul 24, 2018 by pady_1

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If the bond energies of H–H, Br – Br and H –Br are 433, 192 and $-364\; kJ\; mol ^{–1}$ respectively the $\Delta H^o$ for the reaction $H_2(g)+Br_2(g)\to 2HBr(g)$ is-

asked Jul 24, 2018 by pady_1

2 answers

Which of the following is considered to be an anticancer species :-

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The hormone that helps in the conversion of glucose to glycogen is :-

asked Jul 24, 2018 by pady_1

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A galvanometer of 50 ohm resistance has 25 divisions. A current of $4\times 10^{-4}$ ampere gives a deflection of one division. To convert this galvanometer into a voltmeter having a range of 25 volts, it should be connected with a resistance of

asked Jul 24, 2018 by pady_1

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Five equal resistances each of resistance R are connected as shown in the Figure. A battery of V volts is connected between A and B. The current flowing in AFCEB will be

asked Jul 24, 2018 by pady_1

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