Recent questions tagged past papers

Dihedral angle in staggered form of ethane is :

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2-butene shows geometrical isomerism due to :

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Correct order of stability is :

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$CF_2$ = $CF_2$ is monomer of :

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$\alpha-D-glucose$ and $\beta-D-glucose$ are :

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Reduction by $LiAlH_4$ of hydrolysed product of an ester gives :

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Which reagent converts propene to 1-propanol :

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A bubble in glass slab $(\mu = 1.5)$ when viewed from one side appears at 5 cm and 2 cm from other side, then thickness of slab is :

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When an electron do transition from n = 4 to n = 2, then emitted line in spectrum will be :

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The cations and anions are arranged in alternate form in :

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The life span of atomic hydrogen is :

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The correct relation for $\alpha$ , $\beta$ for a transistor :

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For a planet having mass equal to mass of the earth but radius is one fourth of radius of the earth. Then escape velocity for this planet will be

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The potentiometer is best for measuring voltage, as :

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A tall man of height 6 feet, want to see his full image. Then required minimum length of the mirror will be :

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According to the Faraday Law of electrolysis, the mass deposited at electrode proportional to :

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The bob of simple pendulum having length l, is displaced from mean position to an angular position $\theta$ with respect to vertical. If it is released, then velocity of bob at lowest position :

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Given Truth table is correct for :

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From the following diode circuit. Which diode in forward biased condition :

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The ratio (W/Q) for a carnot – engine is $\frac{1}{6}$ ,Now the temp. of sink is reduced by 62ºC, then this ratio becomes twice, therefore the initial temp. of the sink and source are respectively :

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The relation between $\lambda$ and $T_\frac{1}{2}$ is : ( $T_\frac{1}{2}$= half life , $\lambda\rightarrow decay constant$ )

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The equations of two waves given as $X=acos(\omega t+\delta)$ and $X=acos(\omega t+ \alpha)$, Where $\delta=\alpha+\frac{\pi}{2}$, then resultant wave represent :

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Motion of a particle is given by equation $S=({3t^3}+{7t^2}+14 t+8)m$ The value of acceleration of the particle at t = 1 sec. is :

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The width of river is 1 km. The velocity of boat is 5 km/hr. The boat covered the width of river with shortest will possible path in 15 min. Then the velocity of river stream is :

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Electric field atcentre O of semicircle of radius 'a' having linear charge density $\lambda$ given is given by O a

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The frequency order of for $\gamma$- rays b, X – rays a, UV – rays(c):

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To find out degree of freedom, the correct expression is :

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For a hollow cylinder & a solid cylinder rolling without slipping on an inclined plane, then which of these reaches earlier on the ground :

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Maximum frequency of emission is obtained for the transition :

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A capacitor is charged with a battery and energy stored is U. After disconnecting battery another capacitor of same capacity is connected in parallel with it. Then energy stored in each capacitor is :

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Calculate the net resistance of the circuit between A and B :

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A mass of 1kg is thrown up with a velocity of 100 m/s. After 5 seconds, it explodes into two parts. One part of mass 400 g comes down with a velocity 25 m/s Calculate the velocity of other part :

asked Jul 20, 2018 by pady_1

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A body of mass 3 kg hits a wall at an angle of $60^{\circ}$ & returns at the same angle. The impact time was 0.2 s. Calculate the force exerted on the wall :

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Two masses as shown are suspended from a massless pulley. Calculate the acceleration of the system when masses are left free :

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What is vaccine :

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What will be happen if the number of organism increased at a place :

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Green house effect is :

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Minor change in gene's structure is called :

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After ovulation follicles converted into :

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Which protein found in maximum amount :

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Which one is obtained by S. Miller in his experiments on origin of life before 1953 :

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E. coli are used in production of :

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Funaria's male gametes are :

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Casparian bands are found in :

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Industrial melanism is example of :

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Which one is wrong pair :

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Pantothenic acid & Biotin associated with :

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Which one produce gas by decomposing the gobar (Dung) in gobar gas :

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Azolla is used in the cultivation of :

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Which one is associated with occupational hazard is :

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