Science-1

To prevent rusting, a layer of _____ metal is applied on iron sheet.

• zinc

• copper

• gold

• silicon

The conversion of ferrous sulphate to ferric sulphate is _____ reaction.

• oxidation

• reduction

• redox

• displacement

When electric current is passed through acidulated water _______ of water takes place.

• decomposition

• displacement

• combination

• combustion

Addition of an aqueous solution of

 $ZnSO_4$   to an aqueous solution of  $BaCl_2$  is an example of _______ reaction.

• double displacement

• combination

• decomposition

• combustion

If the composition of matter changes during a process then it is called ______

• chemical change

• physical change

• physical and chemical changes

• None of these

The chemical reaction in which two or more products are formed from a single reactant is called _________

• decomposition reaction

• displacement reaction

• addition reaction

• double displacement reaction

When potassium chromate is added to solution of borium solution _____ precipitate is formed.

• Yellow

• white

• green

• brown

 $Veg.Oil\ +\ H_2$  give rise to _____ on heating at  $60\degree$  with catalyst

• Paneer

• Vanaspati Ghee

• Oil

• Cheese

______ is used in electric heater-cooker as a resistor

• Nichrome

• Iron

• Tungsten

• Steel

____ wire is used as a precautionary measure.

• fuse

• copper

• aluminum

• brozen