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To obtain chromium from chromic oxide (Cr2O3), the method used is (a) Alumino-thermic process (b) Electrolytic reduction (c) Carbon reduction the method used is (a) Alumino-thermic process (b) Electrolytic reduction (c) Carbon reduction To obtain chromium from chromic oxide (Cr2O3) November 12, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

Iron is obtained on a large scale from Fe2O3 by (a) Reduction with Al (b) Reduction with CO (c) Reduction with H2 Iron is obtained on a large scale from Fe2O3 by (a) Reduction with Al (b) Reduction with CO (c) Reduction with H2 November 12, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma [...]

A car moving with velocity 50 m s towards a wall sounds a horn of frequency of 1.2 kHz. The velocity of sound is 350 m/s, the apparent frequency of the echo heard by the driver is A car moving with velocity 50 m s towards a wall sounds a horn of frequency of 1.2 [...]

In aluminium extraction by the Baeyer’s process, alumina is extracted from bauxite by sodium hydroxide at high temperatures and pressures alumina is extracted from bauxite by sodium hydroxide at high temperatures and pressures In aluminium extraction by the Baeyer's process November 12, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

The frequencies of two tuning forks A and B are respectively 1.5% more 2.5% less than that of tuning fork C. When A and B sounded together, 12 beats are produced in 1 second. The frequency of tuning fork C is 12 beats are produced in 1 second. The frequency of tuning fork C is [...]

Two uniform wires are vibrating simultaneously in their fundamental modes. The tensions, lengths, diameters and the densities of the two wires are in the ratio 8:1, 36:35, 4:1 and 1:2 respectively. If the note of the higher pitch has a frequency 360 hertz, the number of beats produced per second is: 36:35 4:1 and 1:2 [...]

When two sound sources of the same amplitude but of slightly different frequencies v1 and v2 are sounded simultaneously, the sound one hears has a frequency equal to the sound one hears has a frequency equal to When two sound sources of the same amplitude but of slightly different frequencies v1 and v2 are sounded [...]

The potential difference Va- Vb for the circuit shown in figure is -(22/x) V. Find the value of x. The potential difference Va- Vb for the circuit shown in figure is -(22/x) V. Find the value of x. November 12, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

When two tuning forks (fork 1 and fork 2) are sounded simultaneously, 4 beats per second are heard. Now some tape is attached on the prong of the fork 2. When the tuning fork are sounded again, 6 beats per second are heard. If the frequency of fork 1 is 200Hz, then what was the [...]

The area of cross section, length, and density of a piece of metal of atomic weight 60 are 10^−6 m ^2 , 1 m, and 5 × 10 ^ 3 kgm −3 , respectively. If every atom contributes one free electron, find the drift velocity (in mms −1 ) of electrons in the metal when [...]