How many elements are their_________?

(a) 116

(b) 112

(c) 118

(d) 120

 

Some metals can be beaten into thin sheets. This property is called ______.

 

(a) metallic lustre

 

(b) malleability

 

(c) ductility.

 

(d) Sonorous

 

 

The ability of metals to be drawn into thin wires is called __________.

 

(a) metallic lustre

 

(b) malleability

 

(c) ductility

 

(d) Sonorous

 

 

Metals, in their pure state, have a shining surface. This property is called _________

 

(a) metallic lustre

 

(b) malleability

 

(c) ductility

 

(d) Sonorous

 

 

Name the metal that can be easily cut with a knife.

 

(a) Iron

 

(b) Potassium

 

(c) Gold

 

(d) Copper

 

 

 

Metals are solid except(in specific condition) __________

 

(a) Cesium

 

(b) Gallium

 

(c) Mercury

 

(d) All of these

 

 

Mostly gases are __________

 

(a) Metal

 

(b) Non-Metal

 

(c) Ductile

 

(d) None of these

 

 

_______ Non-Metal present in Liquid form

 

(a) Mercury

 

(b) Iron

 

(c) Potassium

 

(d) Bromine

 

 

__________non-metal is Lustre.

 

(a) Chalk

 

(b) Mercury

 

(c) Gold

 

(d) Iodine

 

 

Diamond is ____________

 

(a) Metal

 

(b) Non-Metal

 

(c) Non –carbon

 

(d) None of these

 

 

______________is regarded to be the hardest known material in the world.

 

(a) diamond

 

(b) Iron

 

(c) Gold

 

(d) None of these

 

 

The best conductors of heat are silver and ____________.

 

(a) Lead

 

(b) Mercury

 

(c) Copper

 

(d) None of these

 

 

Generally, ___________ are good conductors of heat and have high melting points.

 

(a) Metal

 

(b) Non Metal

 

(c) Dense non metal

 

(d) None of these

 

 

Full form of PVC?

 

(a) Polyvinylchloride

 

(b) Polyvinyloxide

 

(c) Polyvinylbromide

 

(d) None of these

 

 

_________ is a nonmetal and allotrope of carbon, is a conductor of electricity.

 

(a) Polyvinyl-oxide

 

(b) Graphite

 

(c) Copper

 

(d) Silver

 

 Note: Allotropy, the existence of a chemical element in two or more forms

 

_______ (lithium, sodium, potassium) are so soft that they can be cut with a knife. They have low densities and low melting points.

 

(a) Nonmetal

 

(b) Gases

 

(c) Alkali metals

 

(d) None of these

 

 

 

A metal ion is a type of atom compound that has an electric charge. Such atoms willingly lose electrons in order to build positive ions called _____________.

 

(a) Proton

 

(b) Anions

 

(c) Cations

 

(d) Electrons

 

 

Elements that tend to gain electrons to form ________ during chemical reactions are called non-metals

 

 

(a) Proton

 

(b) Anions

 

(c) Cations

 

(d) Electrons

 

 

Most ___________produce acidic oxides when dissolve in water.

 

(a) Non-metals

 

(b) Metals

 

(c) Salt

 

(d) None of these

 

 

Most__________, give rise to basic oxides.

 

(a) Non-metals

 

(b) Metals

 

(c) Salt

 

(d) None of these

 

 

__________can be easily cut with a knife.

 

(a) Sodium

 

(b) Water

 

(c) Nitrogen

 

(d) None of these

 

 

Metal + Oxygen –>___________

 

 

(a) Non-metallic oxide

 

(b) Water

 

(c) Metal oxide

 

(d) All of these

 

 

 

2Cu + O2—>2CuO

In this chemical Reaction copper oxide is _______ in
nature

 

(a) Acidic

 

(b) Basic

 

(c) Neutral

 

(d) None of these

 

Note: (zinc oxide and aluminium oxide are amphoteric in nature)

 

 

Al2O3 + 2NaOH —>2NaAlO2 + H2O

In the above reaction aluminium oxide is ___________

 

(a) Acidic

 

(b) Basic

 

(c) Neutral

 

(d) None of these

 

 

 

Al2O3 + 6HCl—–>2AlCl3 + 3H2O

 

(a) Acidic

 

(b) Basic

 

(c) Neutral

 

(d) None of these

 

 

 

Iron is more reactive than _______

 

(a) Zinc

 

(b) Magnesium

 

(c) Potassium

 

(d) copper

 

 

Aluminium is less reactive than ___________

 

(a) Sodium

 

(b) Magnesium

 

(c) Potassium

 

(d) All of these

 

 

 

Lead is More reactive than __________

 

(a) Zinc

 

(b) Calcium

 

(c) Iron

 

(d) None of these

 

 

Silver is more reactive than ________

 

(a) Copper

 

(b) Mercury

 

(c) Zinc

 

(d) Gold

 

 

Which one of the following is highly reactive?

 

(a) Potassium

 

(b) Magnesium

 

(c) Iron

 

(d) Aluminium

 

Aqua regia, (Latin for ‘royal water’) is a freshly prepared mixture of concentrated hydrochloric acid and concentrated nitric acid in the ratio of_____________. It can dissolve gold, even though neither of these acids can do so alone. Aqua regia is a highly corrosive, fuming liquid. It is one of the few reagents that is able to dissolve gold and platinum.

 

(a) 2:1

 

(b) 4:1

 

(c) 3:1

 

(d) 2:2

 

 

At ordinary temperature, the surfaces of ______ covered with a thin layer of oxide. The protective oxide layer prevents the
metal from further oxidation.

 

(a) Water

 

(b) Magnesium

 

(c) Iron

 

(d) None of these

 

Note : magnesium, aluminium, zinc, lead,

 

 

__________ and gold do not react with oxygen even at high temperatures.

 

(a) Silver

 

(b) Potassium

 

(c) Sodium

 

(d) None of these

 

 

 

________is a process of forming a thick oxide layer of aluminium. Aluminium develops a thin oxide layer when exposed to air. This aluminium oxide coat makes it resistant to further corrosion.

 

(a) Anodizing

 

(b) Cathodizing

 

(c) Protectification

 

(d) None of these

 

 

 

Metal + Water –>Metal oxide + ___________

 

(a) Hydrogen

 

(b) Oxygen

 

(c) Carbon dioxide

 

(d) None of these

 

 

 

Metals like potassium and sodium react violently with cold water. In case of sodium and potassium, the reaction is so violent and __________ that the evolved hydrogen immediately catches fire.

 

(a) Exothermic

 

(b) Endothermic

 

(c) A and B

 

(d) None of these

 

 

2K(s) + 2H2O(l)—–>2KOH(aq) + H2(g) + ________

 

(a) Water

 

(b) Carbon dioxide

 

(c) heat energy

 

(d) None of these

 

 

 

Metal oxide + ________—->Metal hydroxide

 

(a) Water

 

(b) Oxygen

 

(c) Nitrogen

 

(d) Carbon dioxide

 

 

_________ (s) + 2H2O(l)—>Ca(OH)2(aq) + H2(g)

 

(a) Ca

 

(b) Cu

 

(c) Pb

 

(d) None of these

 

 

 

Metals like aluminium, iron and zinc do not react either with cold or hot water. But they react with __________to form the metal oxide and hydrogen.

 

(a) Sewage water

 

(b) Steam

 

(c) Ice

 

(d) None of these

 

 

2Al(s) + 3H2O(g) —-> _______+ 3H2(g)

 

(a) Aluminium Oxide

 

(b) Aluminium hydroxide

 

(c) Aluminium sulphate

 

(d) None of these

 

 Hint : Al2O3(s)

 

 

 

Metal + ________—>Salt + Hydrogen

 

(a) Water

 

(b) Dilute acid

 

(c) Base

 

(d) None of these

 

 

 

Hydrogen gas is not evolved when a metal reacts with nitric acid. It is because HNO3 is a strong ________

 

(a) Reducing agent

 

(b) oxidizing agent.

 

(c) Base

 

(d) None of these

 

 

Which of the following metal can react with nitric acid and produce hydrogen gas

 

(a) Gold

 

(b) Magnesium

 

(c) Platinum

 

(d) All of the above

 

 

If Metals react with Solutions of other Metal Salts reactive metals can displace _____reactive metals from their compounds in
solution or molten form.

 

(a) More

 

(b) Less

 

(c) Equal

 

(d) None of these

 

 

 

Metal A is more reactive

Metal A + Salt solution of B—->Salt solution of __ + Metal __

 

(a) B A

 

(b) A B

 

(c) A A

 

(d) B B

 

 

When we drop iron nail in copper sulphate solution

 

(a) No reaction

 

(b) Hydrogen gas produce

 

(c) Fe will displace copper from its compound

 

(d) None of these

 

 

When happen when we react iron sulphate with copper.

 

(a) No reaction

 

(b) Hydrogen gas produce

 

(c) Fe will displace copper from its compound

 

(d) None of these

 

 

Why is sodium kept immersed in kerosene oil?

 

(a) It will react with oxygen

 

(b) It will react will atmospheric heat

 

(c) It will react will atmospheric carbon

 

(d) All of these

 

 

Non-metal do not react with water steam and dilute acid they act as an electron acceptor and cannot supply electron _____ ions of acid to reduce them to hydrogen gas.

 

(a) H+

 

(b) OH-

 

(c) Nitrogen ions

 

(d) None of these

 

 

Non-metal on _______, readily form oxides or salt with concentrated acid

 

(a) Freezing

 

(b) Heating

 

(c) Light

 

(d) None of these

 

                                               

S(s) + 2H2SO4(concentrated)—-heat—->_________  + 2H2O(l)

 

(a) Metal oxide

 

(b) CaCO3

 

(c) 3SO2(g)

 

(d) None of these

 

 

S + 6HNO3→H2SO4 + _______+ 6NO2

 

(a) 2H2O@

 

(b) 2CaCO3

 

(c) 3H2NO3

 

(d) None of these

 

 

The compounds formed in this manner by the transfer of electrons from a metal to a non-metal are known as ___________

 

(a) ionic compounds

 

(b) electrovalent compounds

 

(c) both a and b

 

(d) None of these

 

 

Ionic compounds are solids and are somewhat hard because of the strong force of attraction between the _____________ions. These compounds are generally brittle and break into pieces when pressure is applied.

 

(a) Two positive

 

(b) Two negative

 

(c) positive and negative

 

(d) None of these

 

 

Ionic compounds have ______ melting and boiling points. This is because a considerable amount of energy is required to break the strong inter-ionic attraction.

 

(a) Low

 

(b) High

 

(c) Moderate

 

(d) None of these

 

 

Electrovalent compounds are generally soluble in _______ and insoluble in solvents such as kerosene, petrol, etc.

 

(a) Water

 

(b) Metal

 

(c) Acid

 

(d) Diesel

 

 

ionic compounds conduct electricity in the _____________state.

 

(a) Solid

 

(b) Molten

 

(c) Both A and B

 

(d) None of these

 

 

gold, silver, platinum and copper are found in the _________

 

(a) liquid state

 

(b) free state

 

(c) A and B

 

(d) None of these

 

 

The ________ is the major source of metals.

 

(a) Sea water

 

(b) earth’s crust

 

(c) air

(d) All of the above

 

Ores mined from the earth are usually contaminated with large amounts of impurities such as soil, sand, etc., called ______.

 

(a) separation

 

(b) gangue

 

(c) Mercuric

 

(d) None of these

 

 

Oxides that react with both acids and bases to form salt and water are known as __________.

 

(a) anode

 

(b) amphoteric oxides

 

(c) cathode

 

(d) All of these

 

 

________ is a method of protecting steel and iron from rusting by coating them with a thin layer of zinc.

 

(a) alloys.

 

(b) Galvanizations

 

(c) Rusting

 

(d) None of these

 

Assertion: when iron react with dilute sulphuric acid, ferrous sulfate produces and hydrogen gas release.

 

Reason: Metal + Dilute acid—>Salt + Hydrogen

 

A – Both A and R are true and R is the correct explanation of A.

B – Both A and R are true but R is NOT the correct explanation of A.

C – A is true but R is false.

D – A is false but R is true.

E – Both A and R are false

 

 

Assertion: we store sodium in kerosene

 

Reason: sodium is highly reactive; sodium reacts with oxygen.

 

A – Both A and R are true and R is the correct explanation of A.

B – Both A and R are true but R is NOT the correct explanation of A.

C – A is true but R is false.

D – A is false but R is true.

E – Both A and R are false

 

 

Assertion: Mercury is metal

 

Reason: mercury exist as solid at room temperature.

 

A – Both A and R are true and R is the correct explanation of A.

B – Both A and R are true but R is NOT the correct explanation of A.

C – A is true but R is false.

D – A is false but R is true

E – Both A and R are false

 

 

Assertion: mercury exist as liquid state at room temperature.

 

Reason: Gallium exist as liquid state

 

A – Both A and R are true and R is the correct explanation of A.

B – Both A and R are true but R is NOT the correct explanation of A.

C – A is true but R is false.

D – A is false but R is true.

E – Both A and R are false.

 

 

Assertion: potassium is metal.

 

Reason: potassium can be easily cut with a knife.

 

A – Both A and R are true and R is the correct explanation of A.

B – Both A and R are true but R is NOT the correct explanation of A.

C – A is true but R is false.

D – A is false but R is true.

E – Both A and R are false.

 

 

Assertion: ionic compounds have low melting points?

 

Reason: Ionic compounds are the ones which has both positive and negative charges. Hence there will be strong force of attraction between them. This make expenditure of lot of heat to break this force of attraction

 

A – Both A and R are true and R is the correct explanation of A.

B – Both A and R are true but R is NOT the correct explanation of A.

C – A is true but R is false.

D – A is false but R is true.

E – Both A and R are false.

 

 

Assertion: When zinc is added to a solution of iron (II) sulphate. Zinc displace iron from its compound

 

Reason: Zinc is more reactive than iron.

 

A – Both A and R are true and R is the correct explanation of A.

B – Both A and R are true but R is NOT the correct explanation of A.

C – A is true but R is false.

D – A is false but R is true.

E – Both A and R are false.

 

 

Assertion: Zinc can displace magnesium from its compound

 

Reasons: Zinc is more reactive than magnesium.

A – Both A and R are true and R is the correct explanation of A.

B – Both A and R are true but R is NOT the correct explanation of A.

C – A is true but R is false.

D – A is false but R is true.

E – Both A and R are false.

 

 

Assertion: ionic compounds is also known electrovalent compounds

 

Reason: platinum and copper are found in the free state.

 

A – Both A and R are true and R is the correct explanation of A.

B – Both A and R are true but R is NOT the correct explanation of A.

C – A is true but R is false.

D – A is false but R is true.

E – Both A and R are false.

 

 

 

Assertion: The metals in the middle of the activity series (Zn, Fe, Pb, etc.) are moderately reactive.

 

Reason: They are found in the earth’s crust mainly as oxides, sulphides or carbonates.

 

A – Both A and R are true and R is the correct explanation of A.

B – Both A and R are true but R is NOT the correct explanation of A.

C – A is true but R is false.

D – A is false but R is true.

E – Both A and R are false.