Test understanding. select the Correct Answer
Boron is a
- metal
- non-metal
- metalloid
- element
Which of the following is used for manufacture of cement and glass?
- baking soda
- bleaching powder
- quick lime
- washing soda
Which of the following is used for fire extinguisher?
- quick lime
- bleaching powder
- washing soda
- baking soda
Hardest metal is
- copper
- sodium
- diamond
- osmium
Caustic potash is
- silica
- sodium hydroxide
- potassium hydroxide
- zinc carbonate
Which of the following is calamine?
- silica
- zinc carbonate
- sodium hydroxide
- zinc hydroxide
Which elements are liquid at room temperature?
- cesium
- rubidium
- francium
- all of the above
Which element gets its name from the Greek for violet?
- calcium
- zinc
- potassium
- iodine
Which element is used in making matches and rat poison?
- aluminium
- phosphorous
- iron
- chlorine
Which element is used in making X-Ray machines and automobile batteries?
- sodium
- potassium
- zinc
- lead