Practice Pakistan's most useful MCQs for competitive exams

The property by virtue of which metals can be beaten into thin sheets is known as

• (A)  Ductility
• (B)  Malleability
• (C)  Conductivity
• (D)  Density

Answer

Submitted By :Ali Uppal

Steering of a car involves

• (A)  A single force
• (B)  Two forces acting in the same direction
• (C)  Two forces acting along different lines and in opposite direction.
• (D)  A pair of forces acting along the same line and in opposite direction

Answer

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Which one of the following is the main culprit in the thinning of Ozone layer in the earth’s stratosphere

• (A)  Carbon dioxide
• (B)  Chlorofluorocarbons
• (C)  Nitrogen oxides
• (D)  Methane

Answer

Submitted By :Ali Uppal

SI unit of time is_________

• (A)  second
• (B)  kilo gram
• (C)  meter
• (D)  volt

Answer

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Elements are made of _________

• (A)  Atoms
• (B)  Molecules
• (C)  H2O
• (D)  Compounds

Answer

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____________ have no charge

• (A)  Neutrons
• (B)  Protons
• (C)  Electrons
• (D)  None of These

Answer

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___________are negatively (_) charged particles of an atom

• (A)  Protons
• (B)  Neutrons
• (C)  Electrons
• (D)  None of These

Answer

Submitted By :Ali Uppal

_____________ are positively (+) charged particles

• (A)  Neutrons
• (B)  Electrons
• (C)  Protons
• (D)  None of These

Answer

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The protons and neutrons are found in the center of the atom, which is called the _________of the atom

• (A)  Nucleus
• (B)  Headquarters
• (C)  Hub
• (D)  None of These

Answer

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What are the three subatomic particles of an atom

• (A)  Protons,Neutrons & Electrons
• (B)  Protons,Nucleus & Electrons
• (C)  Protons,Nucleus & Elements.
• (D)  Elements,Nucleus & Protons

Answer

Submitted By :Ali Uppal