30 liters of water is added to a 120 liters mixture containing 40% of alcohol. What is the percentage concentration of alcohol in the resultant mixture?
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Each sentence given below contains an underlined word or phrase. Replace it with a phrasal verb that expresses the same idea.
The dog looked as if it was about to attack me.
Radheshyam is your colleague and teaches Science in your school. He often assigns group projects to the students, for he feels that group project work helps in developing
Phonological awareness refers to the ability to:
Gender discrimination in a classroom:
नीचे दिए गए शब्दों का सही संधि वाला विकल्प पहचानिए?
धर्म + अर्थ
A watch shows the time as 3 : 25. What will be the time that appears when seen through a plane mirror ?
Two terminals of a cell of emf 2.5 V are connected to the two ends of the 10 ohm resistance coil. If the current in the circuit is 0.2 A, then the internal resistance of the cell is
Kirchhoff’s second law is a consequence of
The amplitude of the magnetic field part of a harmonic electromagnetic wave in vacuum is B0= 510 nT. Amplitude of the electric field part of the wave is
A coil in the shape of an equilateral triangle of side 1 is suspended between the pole pieces of a permanent magnet such that B is in the plane of the coil. If due to current i in the triangle, a torque τ acts on it. The side l of the triangle is
A ray of light passes through a plane glass slab of thickness t and refractive index μ = 1.5. The angle between the incident ray and emergent ray will be:
In a Young’s double-slit experiment, the slits are separated by 0.28 mm and the screen is placed 1.4 m away. The distance between the central bright fringe and the fourth bright fringe is measured to be 1.2 cm. Determine the wavelength of light used in the experiment
Passage II
The electrodes in a lead-storage battery are made of Pb and PbO2. During discharge following reactions occurs:
Pb +PbO2 + 2H2SO4 → 2PbSO4 + 2H2O (Pb = 207); E0 = 2.00v
Q.
[SO42-] due to 4.8 M H2SO4 in lead-storage battery is
Which of the following is π complex :
If x1, x2 and x3 are enthalpies of H - H, O = O and O - H bonds respectively, and x4 is the enthalpy of vaporisation of water, estimate the standard enthalpy of combustion of hydrogen
At 300K molar conductivity of solution A is 350 units, and at infinite dilution the molar conductivity of the same sample is 480 unit. Predict the percentage dissociation of the electrolyte.
Which of the following can exhibit linkage isomerism?
The quantity of electricity required to liberate 0.01g equivalent of an element at the electrode is-
The interval (2, 4) written in set builder form is:
If A, B are, respectively m × n, k × l matrices, then both AB and BA are defined if and only if
3 docs|30 tests
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3 docs|30 tests
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