Which variety of glass is heat resistant? - PakMcqs

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1. The variety of coal in which the deposit contains recognizable traces of the original plant material is____________?

   A. bitumen B. anthracite C. lignite D. peat Submitted by: WIQAR AHMAD...

2. A glass chimney stops an oil lamp from smoking because:

   A. It increases the supply of oxygen to the flame by convection B. The heat produced ensures complete C. Both to these D. Neither of these Submitted by: hamza...

3. Glass is made of the mixture of______________?

   A. Quartz and Mica B. Sand and Salt C. Sand and Silicates D. None of these Submitted by: Jack Sparrow...

4. The type of glass used in making lenses and prism is___________?

   A. Pyrex glass B. jena glass C. Flintglass D. Soft glass Submitted by: Asad Ullah Afridi...

5. Which of the following cannot be stored in glass bottle?

   A. Aqua regia B. HF C. HCL D. HBr Submitted by: MUHAMMAD ALI...

6. Which one of the following of glass can cut ultraviolet rays?

   A. Jena Glass B. Soda Glass C. Pyrex Glass D. Crookes Glass Submitted by: Parvez Malik...

7. The hard, solid rocks, whose composition or texture has been changed by heat or pressure in the Earth are called____________?

   A. Sedimentary rocks B. Metamorphic rocks C. Igneous rocks D. All of the above Submitted by: Mansoor Ul Haque...

8. During which process does heat transfer occur because of density differences__________?

   A. Convection  B. Radiation C. Conduction D. None of these Submitted by: Rida...

9. The gas heater gives us heat by __________?

   A. Radiation B. Conduction C. Convection D. Environmental pressure Submitted by: Mansoor Ahmed Suhag...

10. If steel is heated to a temperature well below red heat and is then cooled slowly, the process is called_________?

    A. Annealing B. Quenching C. Tempering D. Nitriding Submitted by: Muhammad Ali Kunbhar...