Physical Science
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Q41.Which of the following element is not essential for plants?
Correct Answer: D
Q42.Laughing gas is also called ?
Correct Answer: C
Q43.Which element is called the "earth maker"?
Correct Answer: D
Q44.Isotopes are the atoms of the same element with different number of :
Correct Answer: C
Q45.Which gas is predominantly responsible for global Warming:
Correct Answer: B
Q46.Which of the following gases is used in extinguish fire ?
Correct Answer: D
Q47.Most abundant element in the atmosphere ?
Correct Answer: A
Q48.The extraction of metal from its ore is done by "smelting", which involves:
Correct Answer: A
Correct Answer: Heating and chemical reduction.
Q49.An atom consists of three primary atomic particles. These are:
Correct Answer: A
Protons and Neutrons lie in the nucleus, Electrons orbit outside (FPSC 2026).
Q50.The chemical symbol for Gold is:
Correct Answer: B
Derived from the Latin word 'Aurum' (FPSC 2025).
Q51.The chemical formula of common table salt is:
Correct Answer: C
Sodium Chloride (NaCl) (FPSC 2025).
Q52.Which chemical element has the highest electrical conductivity of all metals?
Correct Answer: C
Correct Answer: Silver. Silver possesses the highest electrical and thermal conductivity of any element.
Q53.Which of the following is a greenhouse gas?
Correct Answer: D
Q54.The chemical reaction happening in the Sun responsible for heat production is ?
Correct Answer: D
Q55.Which metal is present in percentage in stainless steel?
Correct Answer: B
Q56.The chemical formula CH.COOH is called?
Correct Answer: B
Q57.Chemical used in minor surgery of pain relief is ?
Correct Answer: A
Q58.Which primary component of green house gas human induced contributes to global warming?
Correct Answer: D
Q59.The major cause of oceanic acidification?
Correct Answer: A
Q60.Which gas can be produced by baking the Baking Soda?
Correct Answer: A