Question Answers

Which one of the following characteristics of the transition metals is associated with their catalytic activity (a) Variable oxidation states Which one of the following characteristics of the transition metals is associated with their catalytic activity (a) Variable oxidation states November 29, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

The work function of a substance is 4.0 eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately The work function of a substance is 4.0 eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately November 29, 2020 Category: Chapter 17 - [...]

According to Einstein’s photoelectric equation, the plot of the kinetic energy of the emitted photo electrons from a metal Vs the frequency, of the incident radiation gives straight line whose slope According to Einstein's photoelectric equation of the incident radiation gives straight line whose slope the plot of the kinetic energy of the emitted photo [...]

If the kinetic energy of a free electron doubles, it’s de-Broglie wavelength changes by the factor If the kinetic energy of a free electron doubles it’s de-Broglie wavelength changes by the factor November 29, 2020 Category: Chapter 17 - Dual Nature of Radiation , JEE Mains Physics 2002-2019 Solved Video Solutions ,

A Photocell is illuminated by a small bright source placed 1m away. When the same source of light is placed 1/2m away, the number of electrons emitted by photocathode would : A Photocell is illuminated by a small bright source placed 1m away. When the same source of light is placed 1/2m away the number [...]

A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected along the direction of the fields with a certain velocity, then : A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. [...]

Which of the following has the maximum number of unpaired d-electrons (a) Zn (b) Fe 2+ (c) Ni 3+(d) Cu + Which of the following has the maximum number of unpaired d-electrons (a) Zn (b) Fe 2+ (c) Ni 3+(d) Cu + November 29, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP [...]

Which of the following ionic species will impart colour to an aqueous solution (a) Ti 4+ (b) Cu + (c) Zn 2+ (d) Cr 3+ Which of the following ionic species will impart colour to an aqueous solution (a) Ti 4+ (b) Cu + (c) Zn 2+ (d) Cr 3+ November 29, 2020 Category: Uncategorised [...]

A transition element X has a configuration (Ar)3d4 in its +3 oxidation state. Its atomic number is (a) 25 (b) 26 (c) 22 (d) 19 A transition element X has a configuration (Ar)3d4 in its +3 oxidation state. Its atomic number is (a) 25 (b) 26 (c) 22 (d) 19 November 29, 2020 Category: Uncategorised [...]

Mercury is the only metal which is liquid at 0 C. This is due to its (a) Very high ionisation energy and weak metallic bond Mercury is the only metal which is liquid at 0 C. This is due to its (a) Very high ionisation energy and weak metallic bond November 29, 2020 Category: Uncategorised [...]