Basic Chemistry

Total Questions: 27

1 - ------ results from the attraction between oppositely charged ions .

A ) Ionic bond ✅

B ) Metallic Bond

C ) Covalent bond

D ) None of these

2 - What type of bond involves the sharing of electron pairs?

A ) Ionic bond

B ) Covalent bond ✅

C ) Metallic Bond

D ) Hydrogen bond

3 - Which of the following materials is not used for explosion purposes?

A ) Wood ✅

B ) Copper

C ) Iron

D ) Gold

4 - "Cu" is the symbol of which element of the periodic table-----:

A ) Copper ✅

B ) Chromium

C ) Carbon

D ) None of these

5 - Other than limestone which is soluble in karst topography----:

A ) Gypsum

B ) Dolomite

C ) Shale

D ) Both A and B ✅

6 - Most common element all perfume is---:

A ) Ethyl alcohol ✅

B ) Butane

C ) Propene

D ) None of these

7 - The element which is most abundant in Earth's crust is?

A ) Oxygen ✅

B ) Aluminium

C ) Iron

D ) Silicon

8 - The most abundant metal found in Earth crust-----:

A ) Aluminium ✅

B ) Iron

C ) Carbon

D ) Oxygen

9 - The solution of concentrated common salt in water is-----:

A ) Brine ✅

B ) Jelly

C ) Mist

D ) None of these

10 - Which of the following is a characteristic of metallic Bonds?

A ) Electrons are localized

B ) Electrons move freely in a lattice ✅

C ) Electrons are transferred

D ) Electrons are shared equally

11 - Cognite Bond forms between two atoms that----:

A ) Shares electron ✅

B ) Have opposite charges

C ) Donate electrons

D ) Accept electrons

12 - Which of the following bonds is most likely to occur between two non metals?

A ) Covalent bond ✅

B ) Ionic bond

C ) Metallic Bond

D ) Pollar bond

13 - What type of Bond forms between a metal and non metal?

A ) Ionic bond ✅

B ) Covalent bond

C ) Metallic Bond

D ) Hydrogen bond

14 - Which of the following is a property of ionic compounds?

A ) High melting and boiling points ✅

B ) High electrical conductivity in solid form

C ) Electrical conductivity in gaseous state

D ) Malleability

15 - Which among the following solution can be used as electrolytes?

A ) NaCl ✅

B ) Strach

C ) Sugar

D ) Urea

Explanation:

✅ Q: Solutions can be used as electrolytes — Which ones?

✅ NaCl
➡️ Solutions that conduct electricity due to the presence of ions

📘 Explanation for Exams:

Electrolytes are solutions that conduct electricity due to the presence of free ions.

Electrolytes are substances that, when dissolved in water, produce ions and allow the solution to conduct electricity.

🔋 Examples of Solutions That Can Be Used as Electrolytes:

Type Examples
Acids ( HCl, H₂SO₄ )
Bases (NaOH, KOH)
Salts ( NaCl, KNO₃, CaCl₂)
Ionic compounds (Any soluble salt that dissociates)

❌ Non-Electrolyte Solutions:

🔋 Do not conduct electricity
✅ Examples: Sugar, Alcohol, Distilled water.

16 - Which of the following is an example of non metal?

A ) Oxygen ✅

B ) Copper

C ) Sodium

D ) Iron

17 - The bond formed between two atoms by the sharing of one or more pairs of electrons is called:

A ) Covalent bond ✅

B ) Hydrogen bond

C ) Ionic bond

D ) Metallic Bond

18 - Which of the following is the most common type of Bond in organic molecules?

A ) Ionic bond

B ) Hydrogen bond

C ) Metallic Bond

D ) Covalent bond ✅

19 - Which of the following elements is a noble gas?

A ) Neon ✅

B ) Nitrogen

C ) Oxygen

D ) Chlorine

Explanation:

✅ Noble Gas:

A noble gas is a chemical element in Group 18 (also called Group VIII-A) of the Periodic Table. Noble gases are colorless, odorless, tasteless, and nonreactive under normal conditions.

✅They are called noble gases because they are inert (non-reactive) under normal conditions.

📘 Noble Gases List (Group 18 of Periodic Table):