List of practice Questions

How can the three resistances 2 Ω, 3 Ω, and 6 Ω be connected, so that (i) total resistance of 4 Ω is obtained, and (ii) total resistance of 1 Ω is obtained?
Write the name, (ii) working, and (iii) colours of the insulation of the wires used in the domestic electrical distribution.
On which factors does the magnetic field due to a current-carrying conductor depend? Write and explain the name of the law used to find the direction of the magnetic field.
Write the structural formulae of the following compounds:
(i) Ethanoic acid
(ii) Methanal
(iii) 1-Chloropropane
(iv) Nitromethane
Explain electrochemical series and write its two applications.
What do you mean by alloys? Write the names and uses of two main alloys of copper.
Write the IUPAC name of the following compounds:
(a) HCHO
(b) CH3 - CH = CH2
Buds on leaf develop in:
Example of unisexual flower is:
Normal blood pressure of a healthy human is:
Which of the following constitutes a food chain?
The image formed of an object at a distance of 25 cm from a convex mirror is half the length of the object. Determine (i) the distance of the image from the mirror, and (ii) the focal length of the mirror.
On placing a concave lens in the path of convergent rays, they focus on the axis in the back, 20 cm from the lens.
In the absence of a lens, where do the rays focus? The focal length of the lens is 30 cm.
The pH value of pure water is:
Antimony is:
Energy currency in cellular process is:
Bile juice is secreted by:
Pollen sac contains:
Ampere-second is the unit of:
Two wires of resistances \( R_1 \) and \( R_2 \) are connected to a cell in parallel. If the currents flowing in them are \( i_1 \) and \( i_2 \), and the heats produced in them are \( H_1 \) and \( H_2 \), respectively, per second, the ratio of heat is:
Unit of intensity of magnetic field is:
The homologous series in the following is:
Chemical formula of Lead Nitrate is:
The image formed by a convex mirror is always:
When light rays move away from the normal while going from one medium to another, then they move from: