Question
Which of the following property of an element never changes?
✓
Answer
- Atomic weight
The atomic weight is a characteristic property of an element and can never vary.
The valency of an element can vary. For example, when the ion is in +2 and +3 oxidation state, its valency is 2 and 3 respectively.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A body of mass $M$ is kept on a rough horizontal surface $($friction coefficient = $\mu).$ A person is trying to pull the body by applying a horizontal force but the body is not moving. The force by the surface on $A$ is $F,$ where:
→The control rod in a nuclear reactor is made of(a) Uranium(b) Cadmium(c) Graphite(d) Plutonium
Spherical aberration in a lens(a) Is minimum when most of the deviation is at the first surface(b) Is minimum when most of the deviation is at the second surface(c) Is minimum when the total deviation is equally distributed over the two surface (d) Does not depend on the above consideration
A ferromagnetic material is placed in an external magnetic field. The magnetic domains:
- Increase in size.
- Decrease in size.
- May increase or decrease in size.
- Have no relation with the field.
The wavelength of yellow line of sodium is $5896 \mathring A$ . Its wave number will be
→For the study of the helical structure of nucleic acids, the property of electromagnetic radiation generally used is(a) Reflection(b) Interference(c) Diffraction(d) Polarization
The momentum in mechanics is expressed as m × v. The analogous expression in electricity is(a) I × Q (b) I × V (c) L × I (d) L × Q
A plano convex lens is made of glass of refractive index 1.5. The radius of curvature of its convex surface is R. Its focal length is(a) R/ 2 (b) R(c) 2R(d) 1.5 R
The reading of a high resistance voltmeter when a cell is connected across it is 2.2 V. When the terminals of the cell are also connected to a resistance of 5Ω the voltmeter reading drops to 1.8 V. Find the internal resistance of the cell(a) 1.2 Ω (b) 1.3 Ω (c) 1.1 Ω(d) 1.4 Ω
In the figure a capacitor is filled with dielectrics. The resultant capacitance is
