Sea water (Salt water) freezes at ?

Related Mcqs:

1. The salinity of sea water is determined by the amount of common salt (Sodium Chloride) in __________ of sea water.

   A. 1 gram
   B. 10 grams
   C. 1 kg
   D. 10 kg

2. Average salinity or ratio of salt as per kilogram of water of ocean is__________?

   A. 35 grams
   B. 55 grams
   C. 32 grams
   D. 42 grams

   Submitted by: FAZAL ULLAH

3. An egg sinks in soft water but floats in a concentrated solution of salt because?

   A. egg absorbs salt from the solution and expands
   B. albumin dissolves in salt solution and egg becomes lighter
   C. the density of salt solution exceeds the density of eggs
   D. water has high surface tension

   Submitted by: Malik Asghar Hussain

4. What is the percentage of salt water on earth surface?

   A. 93%
   B. 95%
   C. 97% 
   D. 76%

   Submitted by: Syed Nizakat Ali Shah

5. A fresh egg when placed in salt water will __________ ?

   A. sink and go to the bottom
   B. sink but will not go to the bottom
   C. Float
   D. Burst

   Submitted by: Abid Hussain

6. An iceberg is floating in sea. How much of its mass will remain above the surface of water?

   A. One tenth
   B. One fifth
   C. One fourth
   D. One third

7. Which metal is extracted from sea water?

   A. Potassium
   B. Magnesium
   C. Aluminum
   D. None of these

   Submitted by: H@yii

8. The most abundant element in sea water is?

   A. Chlorine
   B. Sodium
   C. Sulfur
   D. Magnesium

   Submitted by: Naveed Tahir

9. Epsom salt is chemically known as_________?

   A. Copper Sulfate
   B. Magnesium Sulfate
   C. Ferrous Sulfate
   D. None of these

   Submitted by: ABDUL HAYEE

10. Main use of salt in diet is to : ___________?

    A. ease the process of cooking
    B. increase the taste
    C. produce small amount of hydrochloric acid required for digestion
    D. inclease solubility of food particles in water

    Submitted by: Abid Hussain