8. Chemistry-8 online

Positive charged sub atomic particle is called..........

• Proton

• Elecgron

• Neutron

• Shell

What is atomic weight of chlorine (Cl)?

• 34 amu

• 35 amu

• 36 amu

• 17 amu

Who is called father of periodic table?

• Henery Moseley

• Dimitri Mendeleev

• John Dalton

• Neil Bohr

What is the name of given atom?

• Sodium

• Magnesium

• Potassium

• Calcium

Which element is called halogen (very active non metal)?

• Sodium

• Magnesium

• Chlorine

• Argon

PH value of neutral salt is..............

• less than 7

• Greater than 7

• more than 7

• Equal to 7

When acid reacts with base and change into salt and water. This reaction is also called................

• Combination reaction

• Decomposion reaction

• Neutralization reaction

• Replacement reaction

Which statement is correct?

• Soft water gives more lather in soap.

• Hard water gives more lather in soap.

• Soft water has better taste than hard water.

• Hard water is better to use in different industries.

Temporary hardness of water is removed by using........

• Using salt in water

• Using zeolite in water

• Boiling method

• Using washing soda in water

What is the compositing of Brass?

• Copper 88% and tin 12%

• Copper 70% and zinc 30%

• Copper 80% and tin 20%

• Copper 90% and aluminum 10%