Important Science Questions

📖 Which of the following is the lightest metal?
       (A) Mercury
       (B) Silver
       (C) Lithium
       (D) Lead

👉🏻( C) Lithium



📖 The element present in the largest amount in rocks and minerals is
       (A) Carbon

       (B) Silicon
       (C) Hydrogen
       (D) Aluminum

👉🏻 (B) Silicon



📖 Air is a/an —
       (A) Compound
       (B) Element
       (C) Mixture
       (D) Electrolyte

👉🏻 (C) Mixture



📖 Which of the following is the best conductor of Electricity?
       (A) Ordinary water
       (B) Sea water
       (C) Boiled water
       (D) Distilled water

👉🏻 (B) Sea water



📖 The most abundant metal in the earth’s crust is
       (A) Zinc
       (B) Copper
       (C) Aluminum
       (D) Iron

👉🏻 (C) Aluminum



📖 The gas used to extinguish fire is
       (A) Neon
       (B) Nitrogen
       (C) Carbon dioxide
       (D) Carbon Monoxide

👉🏻 (C) Carbon dioxide



📖 The element common to all acids is
      (A) Oxygen
      (B) Hydrogen
      (C) Nitrogen
      (D) Sulphur

👉🏻 (B) Hydrogen



📖 Gobar gas contains mainly
       (A) Methane
       (B) Carbon dioxide
       (C) Butane
       (D) Carbon Monoxide

👉🏻  (A) Methane



📖 Stainless steel is an alloy of
       (A) Iron, Carbon and Nickel
       (B) Iron and Manganese
       (C) Iron, Chromium and Zinc
       (D) Iron, Chromium and Nickel
👉🏻 (D) Iron, Chromium and Nickel


📖 Balloons are filled with —
       (A) Helium
       (B) Oxygen
       (C) Nitrogen
       (D) Argon

👉🏻(A) Helium

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