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1401.

The signals for parturition orginate from:A. placenta onlyB. placenta as well as fully developed foetusC. oxytocin released from maternal pituitaryD. fully developed foetus only

Answer» Correct Answer - B
1402.

The human hind brain comparises three parts, one of which isA. CerebellumB. HypothalamusC. SpinalD. Corpus callosum

Answer» Correct Answer - A
1403.

Consider the following processes :- `{:(,DeltaH(kJ//mol)),((1)/(2)A rarr B,+150),(3B rarr2C+D,-125),(E+A rarr 2D,+350),("For "B+D rarr E+2C",",Delta H" will be"):}`A. 325 `kJ//mol`B. 525 `kJ//mol`C. `-175 kJ.mol`D. `-325 kJ//mol`

Answer» Correct Answer - C
2(i)-(iii)+(ii)
`Delta=2(150)-350-125`
= -175kJ/mol
1404.

Maximum number of electrons in a sub-shell with `l = 3` and `n = 4` is.A. 10B. 12C. 14D. 16

Answer» Correct Answer - C
Subshell 4f=election =14
1405.

Standard enthalpy of vaporisation`DeltaV_(vap).H^(Theta)` for water at `100^(@)C`is`40.66kJmol^(-1)`.The internal energy of Vaporization of water at` 100^(@)C("in kJ mol"^(-1))`isA. `+43.76`B. `+40.66`C. `+37.56`D. `-43.76`

Answer» Correct Answer - C
`H_(2)O_((1))to H_(2)O_((g))`
Delta H=DeltaE=DeltanRT`
`40.66=DeltaE+1xx(8.314)/(1000)xx373`
`DeltaE=37.5` kJ
1406.

A gas such as carbon monoxide would be most likely to obey the ideal gas law atA. high temperature and high pressureB. low temperatures and low pressuresC. high temperature and low pressuresD. low temperatures and high pressures

Answer» Correct Answer - C
For real gases
`(P+(an^(2))/(V^(2)))(V-nb)=nRT` . . . (1)
At high temperature intramolecular attractive forces are neglected i.e., `(an^(2))/(V^(2))` term is neglected. At low pressure volume is high so nb term is neglected.
Hence from equation (1) PV=nRT
1407.

`50 mL` of each gas `A` and of gas `B` takes `150 and 200` seconds respectively for effusing through a pin hole under the similar conditon. If molecular mass of gas `B` is `36`, then the molecular mass of gas `A` will beA. 32B. 64C. 96D. 128

Answer» Correct Answer - B
`(r_(1))/(r_(2))=sqrt((M_(w_(2)))/(M_(w_(1))))`
`(V_(1))/(t_(1))xx(t_(2))/(V_(2))=sqrt((M_(w_(2)))/(M_(w_(1))))`
`(50)/(150)xx(200)/(50)=sqrt((36)/(M_(w_(1))))`
`(4)/(3)=sqrt((36)/(M_(w_(1))))`
`(16)/(9)=(36)/(M_(w_(1)))`
`M_(w_(1))=(36xx9)/(16)=20.25`
1408.

Foolish Seedling disease of rice led to the discovery ofA. IAAB. GAC. ABAD. 2,4-D

Answer» Correct Answer - B
1409.

Cry 1 endotoxins obtained from Bacillus Thuringiensis are effective againstA. NematodesB. Boll wormsC. MosquitoesD. Flies

Answer» Correct Answer - B
1410.

Which one of the following does not correctly represent the correct order of the property indicated against itA. `Ti^(3+) lt V^(3+) lt Cr^(3+) lt Mn^(3+)`: increasing magnetic momentB. `Ti lt V lt Cr lt Mn` : increasing melting pointC. `Ti lt V lt Mn lt Cr` : increasing `2^(nd)` ionisation enthalpyD. `Ti lt V lt Cr lt Mn` : increasing number of oxidation states

Answer» Correct Answer - B
Along the 3d series melting point increases upto the Cr than decreases.
1411.

Consider the following reactions : (a) `H_((aq))^(+)+OH_((aq))^(-)=H_(2)O_((l)), Delta H= - X_(1)"kJ mol"^(-1)` (b) `H_(2(g))+(1)/(2)O_(2(g))=H_(2)O_((l)), Delta H= - X_(2)"kJ mol"^(-1)` (c ) `CO_(2(g))+H_(2(g))=CO_((g))+H_(2)O_((l))- X_(3)"kJ mol"^(-1)` (d) `C_(2)H_(2(g))+(5)/(2)O_(2(g))=2CO_(2(g))+H_(2)O_((l))+X_(4)"kJ mol"^(-1)` Enthalpy of formation of `H_(2)O_((l))` is :A. `+X_(1)kJ mol^(-1) `B. `-X_(2)kJ mol^(-1)`C. `+X_(3)kJ mol^(-1)`D. `-X_(4) kJ mol^(-1)`

Answer» Correct Answer - B
1412.

Which one of the following is the correct matching of a vitamin , its nature and its deficiency diseaseA. Vitamin K–Fat soluble Beri BeriB. Vitamin A–Fat soluble Beri BeriC. Vitamin K–Water soluble PellagraD. Vitamin A–Fat soluble Night blindness

Answer» Correct Answer - D
1413.

Injury to vagus nerve in humans is not likely to affectA. Gastrointestinal movementsB. Pancreatic secretionC. Cardiac movementsD. Tongue movements

Answer» Correct Answer - D
1414.

In 1984 the Bhopal gas tragedy took place because methyl isocyanate reacted with:A. Reacted with ammoniaB. Reacted with `CO_2`C. Reacted with waterD. Reacted with DDT

Answer» Correct Answer - C
1415.

Match List -I (Equations) with List -II (Type of processes) and select the correct option. `{:(,"List -I",,"List -II"),(,"Equation",,"Type of processes"),((a),K_(p)gt Q,(i),"Non spontaneous"),((b),Delta G^(@)lt RT ln Q,(ii),"Equilibrium"),((c ),Kp = Q,(iii),"Spontaneous and endothermic"),((d),T gt (Delta H)/(Delta S),(iv),"Spontaneous"):}`A. `{:("(a) (b) (c) (d)"),("(iii) (iv) (ii) (i)"):}`B. `{:("(a) (b) (c) (d)"),("(iv) (i) (ii) (iii)"):}`C. `{:("(a) (b) (c) (d)"),("(ii) (i) (iv) (iii)"):}`D. `{:("(a) (b) (c) (d)"),("(i) (ii) (iii) (iv)"):}`

Answer» Correct Answer - B
1416.

Dough kept overnight in warm weather becomes soft and spongy due toA. FermentationB. CohesionC. OsmosisD. Absorption of carbon dioxide from atmosphere

Answer» Correct Answer - A
1417.

During the propagation of a nerve impulse, the action potential results from the movement ofA. `K^(+)` ions from intracellular fluid to extracellular fluidB. `Na^(+)` ions from extracelluar fluid to intracellular fluidC. `K^(+)` ions from extracellular fluid to intracellular fluidD. `Na^(+)` ions from intracellular fluid to extracellular fluid

Answer» Correct Answer - B
1418.

Mitotic spindle is mainly composed of __ proteins.A. ActinB. TubulinC. ActomyosinD. Myoglobin

Answer» Correct Answer - B
1419.

At which latitude, heat gain through insolation approximately equals heat loss through terrestrial radiation -A. `40(1)/(2)""^(@)` North and SouthB. `22(1)/(2)""^(@` North and SouthC. `40^(@)` North and SouthD. `66^(@)` North and South

Answer» Correct Answer - D
1420.

In a man, abducens nerve is injured. Which one of the following functions will be affected ?A. SwallowingB. Movement of the eye ballC. Movement of the neckD. Movement of the tongue

Answer» Correct Answer - B
1421.

Which of the following gives ethyl benzene with phenyl methyl ketone :A. Zn–Hg+HClB. `LiAlH_4`C. `KMnO_4`D. None of the above

Answer» Correct Answer - A
1422.

A `0.1` molal aqueous solution of a weak acid is `30%` ionized. If `K_(f)` for water is `1.86^(@)C//m`, the freezing point of the solution will be.A. `-0.24^(@)C`B. `-0.18^(@)C`C. `-0.54^(@)C`D. `-0.36^(@)C`

Answer» Correct Answer - A
`i=1-alpha+nalpha`
i=1-0.3+2(0.3)
i=1.3
`DeltaT_f=iK_fm`
`=1.3xx1.86xx0.1`
`DeltaT_f=+0.24^@C`
Freezing point of solution = `-0.24^@C`
1423.

In a normal operation of a transistor, (i) base-emitter junction is forward-biased (ii) base-collector junction is forward-biased (iii) base-emitter junction is reverse-baised (iv) base-collector junction is reverse-biasedA. (a), (b)B. (b), (c )C. (c ), (d)D. (d), (a)

Answer» Correct Answer - B
1424.

The device that can act as a complete electronic circuit isA. junction diodeB. integrated circultC. junction transistorD. Zener diode

Answer» Correct Answer - B
1425.

The following firugre shows a logic gate citrcuit with two inputs A and B the output Y. The voltage waveforms of A, B and Y are as given – The logic gate is -A. OR gateB. AND gateC. NAND gateD. NOR gate

Answer» Correct Answer - C
1426.

A jawless fish which lays eggs in fresh water and whose ammocoete larve after metamorphosis return to ocean isA. PetromyzonB. EptatretusC. MyxineD. Neomyxine

Answer» Correct Answer - A
Petromyzon is jawless marine fish which lays egg in fresh water and whise ammocoetes larva after metamorphosis return to the ocean.
1427.

Which one of the following pairs of items correctly belongs to the category of organs mentioned against itA. Nephridia of earthworm and malpighian tubules of cockroach - Excretory organsB. Wings of honeybee and wings of crow - Homologous organsC. Thorn of Bougainvillea and tendrils of Cucurbita - Analogous organsD. Nictitating membrane and blind spot in human eye - Vestigial organs

Answer» Correct Answer - A
1428.

In Antirrhinium two plants with pink flowers were hybridized. The `F_(1)` plants producedred, pink and white flowers in the proportion of 1 red, 2 pink and1 white. What could be the genotype of the two plants used for hybridization. Red flower colour is determined by RR, and white rr genesA. RRB. RrC. rrD. rrr

Answer» Correct Answer - B
1429.

Given is a diagram of a bacteriophage in which one of the options all the four parts, a, b, c, and d are correct. A. `{:(" A"," B"," C"," D"),("Sheath","Collar","Head","Tail fibres"):}`B. `{:(" A"," B"," C"," D"),("Head","Sheath","Collar","Tail fibres"):}`C. `{:(" A"," B"," C"," D"),("Collar","Tail fibres","Head","Sheath"):}`D. `{:(" A"," B"," C"," D"),("Tail fibres","Head","Sheath","Collar"):}`

Answer» Correct Answer - B
1430.

Which one of the following can not be used for prepration of vaccines against plagueA. Avirulent live bacteriaB. Synthetic capsular polysaccharide materialC. Heat-killed suspensions of virulent bacteriaD. Formalin-inactivated suspensions of virulent bacteria

Answer» Correct Answer - C
1431.

Age of fossils in the past was generally determined by radiocarbon 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, includesA. Study of the conditions of fossilizationB. Electron spin resonance (ESR) & fossil DNAC. Study of carbohydrates/proteins in rocksD. Study of carbohydrates/proteins in fossils

Answer» Correct Answer - B
1432.

A woman with normal vision,but whose father was colour blind,marries a colour blind man.Suppose that the fourth child of this couple was a boy .This boy:A. Must have normal colour visionB. May be colour blind or may be normal visionC. Will be partially colour blind since he is heterozygous for the colour blind mutant allele.D. Must be colour blind

Answer» Correct Answer - B
1433.

If one strand of DNA has the nitrogenous base sequence as ATCTG, what would be the complementary RNA strand sequence ?A. A ACTGB. ATCGUC. T TAGUD. UAGAC

Answer» Correct Answer - D
1434.

Which one of the following mammalian cells is not capable of metabolising glucose to carbon-dioxide aerobically ?A. Red blood cellsB. White blood cellsC. Unstriated muscle cellsD. Liver cells

Answer» Correct Answer - A
1435.

The work done during the expanision of a gas from a volume of `4 dm^(3)` to `6 dm^(3)` against a constant external pressure of 3 atm is (1 L atm = 101.32 J)A. `–608 J`B. `+ 304 J`C. `–304 J`D. `–6 J`

Answer» Correct Answer - A
1436.

Which one of the following is an inner orbital complex as well as diamagnetic in nature?A. `[Zn(NH_(3))_(6)]^(2+)`B. `[Ni(NH_(3))_(6)]^(2+)`C. `[Cr(NH_(3))_(6)]^(3+)`D. `[Co(NH_(3))_(6)]^(3+)`

Answer» Correct Answer - D
1437.

In `BrF_(3)` molecule, the lone pair occupies equatorial position minimizeA. Bond pair – bond pair repulsion onlyB. Lone pair – lone pair repulsion and lone pair– bond pair repulsionC. Lone pair–lone pair repulsion onlyD. Lone pair–bond pair repulsion ony

Answer» Correct Answer - B
1438.

Which one of the following pairs of substances on reaction will not not evolve `H_2` gas?A. Copper and HCl (aqueous)B. Iron and steamC. Iron and `H_(2)SO_(4)` (aqueous)D. Sodium and ethyl alcohol

Answer» Correct Answer - A
1439.

A lake near a village suffered heavy mortality of fishes within a few days Consider the following reasons for this? (a) Lots of urea and phosphate fertilizers were used in the crops in the vicinity. (b) The area was sprayed with DDT by an aircraft. (c) The lake water turned green and stinky. (d) Phytoplankton population in the lake declined initially thereby greatly reducing photosynthesis. Which two of the above were the main causes of fish mortality in the lake?A. (i), (iii)B. (i), (ii)C. (ii), (iii)D. (iii), (iv)

Answer» Correct Answer - A
1440.

Widal test is used for the diagnosis of –A. MalariaB. PneumoniaC. TuberculosisD. Typhoid

Answer» Correct Answer - D
1441.

According to Central Pollution Control Board, air pollutants responsible for great harm have a size (in/mm) ofA. 1.0 or lessB. `5.2-2.5`C. 2.5 or lessD. 1.5 or less

Answer» Correct Answer - C
1442.

Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and muncipal waste water into natural surface water:A. lt 3.0 ppmB. lt10 ppmC. lt 100 ppmD. lt 30 ppm

Answer» Correct Answer - D
1443.

ATPase enzyme needed for muscle contraction is located in " " Or The contractile protein of skeletal muscle involving ATPase activity isA. TropomyosinB. MyosinC. `alpha`-ActinD. Troponin

Answer» Correct Answer - B
1444.

Grafted kidney may rejected in a patient due toA. Innate immune responseB. Humoral immune responseC. Cell-mediated immune responseD. Passive immune response

Answer» Correct Answer - C
Cell mediated immune response.
1445.

Certain characteristic demographic features of developing countries areA. High fertility, high density, rapidly rising mortality rate and very young age distributionB. High infant mortality, low fertility, uneven population growth and a very young age distributionC. High mortality high density, uneven population growth and a very old age distributionD. High fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution

Answer» Correct Answer - D
1446.

Cancer cells are more easily damaged by radiation than normal cells because they are:A. Undergoing rapid divisionB. Different in structureC. Non-dividingD. Starved of mutation

Answer» Correct Answer - A
1447.

In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seeds plant is crossed wit a green seeded plant, what ratio of yellow and green seeded plants would you expect in `F_(1)` generation :-A. `3:1`B. `50:50`C. `9:1`D. `1:3`

Answer» Correct Answer - B
1448.

When a diploid female plant is crossed with a tetraploid male, the ploidy level of endosperm cells in the resulting seed is:A. PentaploidyB. DiploidyC. TriploidyD. Tetraploidy

Answer» Correct Answer - D
1449.

Which of the following pairs correctly matches a hormone with the disease resulting from its deficiency ?A. Insulin – Diabetes insipidusB. Thyroxine – TetanyC. Parathyroid hormone – Diabetes mellitusD. Luteinizing hormone – Failure of ovulation

Answer» Correct Answer - D
1450.

Which of the following pairs correctly matches a hormone with the disease resulting from its deficiency ?A. Relaxin – GigantismB. Prolactin – CretinsimC. Parathyroid hormone – TetanyD. Insulin – Diabetes insipidus

Answer» Correct Answer - C