MATERIALS :METALS AND NON-METALS

Metals can be beaten into thin sheets.Which property does it show?

• ductility

• lustre

• malleabilty

• conductivity

Almost all metals are very hard and non-metals are not very hard.Which following pair is an exception to this statement?

• sodium and sulphur

• potassium and carbon

• sodium and diamond

• iron and phosphorous

Magnesium ribbon burns to produce MgO and this oxide further reacts with water to give rise to Mg (OH)_2, which changes red litmus to blue one.What is the nature of this compound?

• Acidic

• Basic

• both acidic and basic

• none of these

What is the correct equation for reaction between Sodium hydroxide and aluminium?

• NaOH + Al ----> NaAlO₂ + H₂

• NaOH + Al --------> NaAl + H₂O

• NaOH + Al -------> Na₃Al + O₂

• None of these

Which of the following metals are more active with water ?

• Magnesium and Iron

• Aluminium and Copper

• Sodium and Potassium

• Mercury and Zinc

Which of the following non-metal solution is used as antiseptic on wounds?

• sulphur

• iodine

• chlorine

• nitrogen

Name the Non-metal used in the given materials shown in the picture.

• Nitrogen

• phosphorus

• sulphur

• carbon

In a reaction one element removes the less reactive element from a compound and it forms its respective salt.Which chemical reaction is this?

• Neutralization reaction

• displacement reaction

• Both neutralization and displacement reaction

• none of these

What will happen when we add Iron nails in copper sulphate solution .Choose the correct option

• CuSO₄ + Fe -----> FeSO₄ + CuSO₄

• CuSO₄ + I ------> ISO₄ + Cu

• CuSO₄ + Fe ------> FeSO₄ + Cu

• All of the above

Arrange the metals copper, zinc and iron in their increasing order of their reactivity.

• copper,iron,zinc

• iron,copper,zinc

• copper,zinc,iron

• iron,zinc,copper