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The intensity of gamma radiation from a given source is I. On passing through 36 mm of lead, it is reduced to I/8. The thickness of lead which will reduce the intensity to I/2 will be it is reduced to I/8. The thickness of lead which will reduce the intensity to I/2 will be The [...]

Two radioactive substances A and B have decay constants 5λ and λ respectively. At t=0, they have the same number of nuclei. The ratio of number of nuclei of A to those of B will be (1/e)2 after a time they have the same number of nuclei. The ratio of number of nuclei of A [...]

If electron, hydrogen , helium and neon nuclei are all moving with the velocity of light , then the wavelengths associated with these particles are in order helium and neon nuclei are all moving with the velocity of light hydrogen If electron then the wavelengths associated with these particles are in order November 28, 2020 [...]

The correct statement among I and III regarding group 13 element oxides are, (I) Boron trioxide is acidic. (I) Boron trioxide is acidic. The correct statement among I and III regarding group 13 element oxides are November 28, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

The amorphous form of silica is (a) Quartz (b) Kieselguhr (c) Cristobalite (d) Tridymite The amorphous form of silica is (a) Quartz (b) Kieselguhr (c) Cristobalite (d) Tridymite November 28, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

The de – Broglie wavelength associated with a material particle is (a) Directly proportional to its energy directly proportional to momentum (c) Inversely proportional to its energy (d) Inversely proportional to momentum What will be de - Broglie wavelength of an electron moving with a velocity of 1.2 x 10^5 m/s November 28, 2020 Category: [...]

Magnesium powder burns in air to give (a) MgO only (b) MgO and Mg(NO3)2 (c) MgO and Mg3N2 Magnesium powder burns in air to give (a) MgO only (b) MgO and Mg(NO3)2 (c) MgO and Mg3N2 November 28, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

C60, an allotrope of carbon contains (a) 20 hexagons and 12 pentagons (b) 12 hexagons and 20 pentagons an allotrope of carbon contains (a) 20 hexagons and 12 pentagons (b) 12 hexagons and 20 pentagons C60 November 28, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

The correct order of the oxidation states of nitrogen in NO, N2O, NO2 and N2O3 is N2O NO2 and N2O3 is The correct order of the oxidation states of nitrogen in NO November 28, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

A radioactive nucleus is being produced at a constant rate α per second. Its decay constant is λ. If N0 are the number of nuclei at time t = 0, then the maximum number of nuclei possible are A radioactive nucleus is being produced at a constant rate α per second. Its decay constant is [...]