The heats of combustion of carbon and carbon monoxide are -393.5 and -283.5 kJ mol−1, respectively. The heat of formation (in kJ) of carbon monoxide per mole is :
Connecting you to a tutor in 60 seconds.
Get answers to your doubts.
Sodium metal crystallizes in a body centred cubic lattice with a unit cell edge of 4.29 Å. The radius of sodium atom is approximately :
Compound (A), C8H9Br, gives a white precipitate when warmed with alcoholic AgNO3. Oxidation of (A) gives a acid (B), C8H6O4. (B) easily forms anhydride on heating. Identify the compound (A).
The ionic radii (in Å) of N3−,O2− and F− are respectively :
In the circuit shown, the current in the 1Ω resistor is :
Which of the following exists as covalent crystals in the solid state?
The anode voltage of a photocell is kept fixed. The wavelength λ of the light falling on the cathode is gradually changed. The plate current I of the photocell varies as follows:
Statement - I : The value of the integral ∫π/6π/31+tanxdxis equal to 6π.Statement - II : ∫abf(x)dx=∫abf(a+b−x)dx˙
For a simle pendulum, a graph is plotted between its kinetic energy (KE) and potential energy (PE) against its displacement d. Which one of the following represents these correctly ? (Graphs are schematic and not drawn to scale)