Chemistry Mcqs Set 53

Chemistry Mcqs Set 53

1. Choose the correct statement with regard to a solution.
(i) A solution contains a solute and a solvent which is heterogeneous
(ii) A solution may contain two or more substances which is homogeneous
(iii) A true solution is one in which two phases are present
(iv) A homogeneous mixture of dispersed phase and dispersion medium is known as a true solution
 
2. Which of the following is a true solution?
(i) Milk                 
(ii) Salt in carbon di sulphide              
(iii) Blood             
(iv) Sugar solution
 
3. Choose a wrong statement?
(i) The particles of a true solution are not visible even under a powerful ultra microscope
(ii) The particles of a colloidal solution are visible under ultra microscope
(iii) The particles of a true solution show Tyndall effect
(iv) the particles of a colloidal solution show Tyndall effect
 
4. A given solute has a maximum solubility of 36.5 g in 100g of water. Solution A contains 10g of the solute in 100g of water. Solute B contains 35g in 100g of water. Choose the correct statement.
(i) Both are unsaturated solutions                            
(ii) Both are saturated solutions
(iii) Solution A is saturated while solution B is unsaturated
(iv) Solution A is unsaturated while solution B is saturated
 
5. The solubility of sodium chloride in water in 36g at 250C. This means that ...........
(i) 100 g of water can dissolve and 36g of sodium chloride to form an saturated solution at 25oC
(ii) 100 g of water can dissolve only 36g of sodium chloride whatever be the temperature
(iii) only less than 36g sodium chloride can be dissolved in 100g of water at a given temperature
(iv) A solution containing 36g of sodium chloride in 100g of water is a super saturated solution
 
6. The energy present in a cowdung is_______
(a) electrical energy             
(b) chemical energy       
(c) heat energy            
(d) potential energy


7. The solubility of copper sulphate in water is 20.7g at 20oC.
(a) Solution A contains 18g of copper sulphate in 100g of water.
(b) Solution B contains 20.7g of copper sulphate in 100g of water.
(c) Solution C contains 10.35g of copper sulphate in 50g of water.
Which of the following is/ are saturated solutions?
(i)Solution (a) only                           
(ii)Solution (b) only (c)     
(iii)Solution (a) only (c)                    
(iv)Solution (c) only
 
8. The solubility of sodium nitrate at 25oC is 92g. To a saturated solution of sodium nitrate , 5g of sodium nitrate is added. Which of the following will happen of the temperature is raised to 40oC?
(i) The solution becomes an unsaturated solution
(ii) The additional sodium nitrate added remains as such
(iii) The solubility of sodium nitrate decreases an increasing temperature
(iv) There is no change in the solubility of sodium nitrate at 40oC
 
9. Carbon dioxide gas is filled in soft drinks at high pressures. As a result, ............
(i) the solubility of carbon dioxide decrease
(ii) the solubility of carbon dioxide increase
(iii) the increased pressure does not have any effect on the solubility of carbon dioxide gas
(iv) the soft drink because sweety to taste
 
10. Hydrogen chloride (HCl) and water (H2O) are polar compounds. Carbon tetrachloride (CCl4) is a non polar compound . Hydrogen chloride ................
(i) is soluble both in water and carbon tetra chloride
(ii) is insoluble both in water and carbon tetrachloride
(iii) is soluble in water only
(iv) is soluble in carbon tetrachloride only