Question : Burning of coal is an example of_________.

Option 1: decomposition reaction

Option 2: double displacement reaction

Option 3: combination reaction

Option 4: displacement reaction

Question : Heat resistant variety of Glass is ____.

Option 1: Pyrex glass

Option 2: Haed glass

Option 3: Flint glass

Option 4: None of these

Question : Which type of reaction produces the most harmful radiation?

Option 1: fusion reaction

Option 2: Fission reaction

Option 3: chemical reaction

Option 4: Photo-Chemical reaction

Question : C++ is _____________.

Option 1: an operating system

Option 2: a programming language

Option 3: a software

Option 4: None of these

Question : What is the value of $x$ in the equation $\sqrt{\frac{1+x}{x}}-\sqrt{\frac{x}{1+x}}=\frac{1}{\sqrt6}$?

Option 1: –2

Option 2: 3

Option 3: 2

Option 4: None of these