List of practice Questions

An aircraft executes a horizontal loop at a speed of $720\, km$ $h^{-1}$ with its wings banked at $15^?$. What is the radius of the loop? (Take $g=10\, m s^{-2}, tan \,15^{\circ}=0.27$)
An alcohol $(A)$ on dehydration gives $(B)$ which adds bromine molecule to give $(C). (C)$ on heating with sodamide gives $(D)$ which on hydration in the presence of $Hg^{++}/H_{2}SO_{4}$ gives $(E). E$ on reduction by lithium aluminium hydride gives $(A). (E)$ is also obtained on dry distillation of calcium salt of acetic acid. How many enolisable proton present in the product $(E)$?
An aldehyde on oxidation gives
An air bubble in a glass slab (n = 1.5) is 5 cm deep when viewed from one face and 2 cm deep when viewed from the opposite face. The thickness of the slab is
An air bubble in a glass sphere $(\mu = 1.5)$ is situated at a distance $3\, cm$ from a convex surface of diameter $10\, cm$. At what distance from the surface will the bubble appear?
An air cored solenoid with length $20\, cm$, area of cross section $20\, cm^{2}$ and number of turns $400$ carries a current $2\, A$. The current is suddenly switched off within $10^{-3}\, s$. The average back emf induced across the ends of the open switch in the circuit is (ignore the variation in magnetic field near the ends of the solenoid)
An acidified solution of potassium permanganate oxidizes
An aeroplane flying horizontally with a speed of $360\,km\,h^{-1}$ releases a bomb at a height of $490\,m$ from the ground. If $g = 9.8\,m \,s^{-2}$, it will strike the ground at
An ac source of angular frequency $\omega$ is fed across a resistor R and a capacitor C in series. The current registered is I. If now the frequency of source is changed to $\omega/3$ (but maintaining the same voltage), the current in the circuit is found to be halved. Calculate the ratio of reactance to resistance at the original frequency $\omega$
Amrita Devi Bishnoi Wildlife Protection Award is for the individuals or communities from rural areas that have shown extraordinary courage in
An a.c. generator consists of a coil of $100$ turns and cross-sectional area of $3 \,m^{2}$, rotating at a constant angular speed of $60$ radian/sec in a uniform magnetic field of $0.04 \,T$. The resistance of the coil is $500$ ohm. What is the maximum power dissipation in the coil?
An A.C. is given by equation $I = I_1\cos\,\omega t + I_2\,\sin \,\omega t$. The r.m.s. value of current is given by
An A.P., a G.P. and a H.P. have the same first and last terms and the same odd numbers of terms, the middle terms of the three series are in
Amphoteric oxide among the following is -
Amphoteric oxides of Mn and Cr are
Amongst vertebrates, the species diversity is the maximum in
Amphistomatic leaf, with stomata distributed equally on both the surfaces, is an example of
Amongst the following, the strongest base in aqueous medium is _____________ .
Amongst all pairs of positive numbers with product $256$, find those whose sum is the least.
Among the four graphs, there is only one graph for which average velocity over the time interval $ (0, T) $ can vanish for a suitably chosen $ T $ . Which one is it ?
Among the terms listed below, those that are not technically correct names for a floral whorl are (i) Androecium (ii) Carpel (iii) Corolla (iv) Sepal.
Among the following the partial pressure of oxygen is maximum in
Among the following velocity of sound depend in a gaseous medium__
Among the following which one causes more indoor chemical pollution?
Among the following, the dissociation constant is highest for :