When a solid body is partially or completely immersed in a fluid, the fluid exerts an upward force on the body. The magnitude of the force is equal to (1) the mass of the body (2) the weight of the displaced fluid by the body
2 only
Correct Answer: (b) 2 only
Explanation: The buoyant force is equal to the weight of the displaced fluid according to Archimedes' principle.
Which one of the following solutions is not capable of conducting electricity?
Net movement of water from a dilute to a concentrated solution through a selectively permeable membrane is called?
Which one of the following is a heterogeneous mixture?
To help deep-sea divers breathe, they carry cylinders of oxygen mixed with
Which one of the following substances is not a mixture?
Consider the following statements:
I. A solution of iodine in ethanol known as 'tincture of iodine' is a heterogeneous mixture.
II. A suspension is a heterogeneous mixture and its particles scatter a beam of light passing through it, making its path visible.
III. A colloidal solution, although it appears homogeneous, is a heterogeneous mixture.
Which of the statements given above are correct?
Consider the following pairs :
| Example of Colloid | Type of Colloid | |
|---|---|---|
| I. | Cloud | Aerosol |
| II. | Mud | Sol |
| III. | Milk | Emulsion |
| IV. | Rubber | Foam |
How many of the pairs given above are correctly matched?
What will happen to the boiling point of water when a little common salt is added to water and then heated?
Which Statement is correct ?
The pH value of 1 × 10 -8 (M) HCl is:
Tyndall effect is not observed in:
A non-volatile solute, urea ($CO(NH_2)_2$, molar mass $60 \ g/mol$), is dissolved in $180 \ g$ of water ($H_2O$, molar mass $18 \ g/mol$). If the vapor pressure of pure water at a certain temperature is $50 \ mmHg$, what is the vapor pressure of the solution when $18 \ g$ of urea is added?