chemistry 10

Most reactive non-metal is .........................

• Nitrogen

• Oxygen

• Chlorine

• Fluorine

Group IA elements are also called ............

• alkali metals

• alkaline earth metals

• transition element

• all of the above

Which is the longest period in Modern periodic law?

• 3^rd

• 4^th

• 8^th

• 6^th

A strong acid in solution is ................

• mostly molecules

• mostly ions

• both molecules and ions

• mostly water

Which of teh following acid found in stomach of human?

• H₂SO₄

• CH₃COOH

• HNO₃

• HCL

A salt derived from strong base and weak acid will give a salt that is ........

• acidic salt

• Basic salt

• neutral

• volatile

........... reduce the hyper-acidity of stomach.

• aluminium hydroxide

• milk of magnesia

• both

• none

The molecuar weight of H₂SO₄ is

• 95 gm

• 96 gm

• 98 gm

• 9

 $2KClO_{3\ \ \ MNO_2^{ }}^{ }\ \ ^{240^0C}\ \longrightarrow\ 2KCl\ +3O_2$  is an example of .............. 

• addition reaction

• replacement reaction

• decomposition reaction

• Neutralization reaction

Which of the following is an example of displacement reaction?

• HA+BOH = H₂O+BA

• AB+C = AC+B

• AB+CD = AC+BD

• all of these