Questions of science

💢Questions of science💢

👒1]. Which of the following is the lightest metal?
       🔹(A) Mercury
       🔹(B) Silver
       🔹(C) Lithium
       🔹(D) Lead

🐙Answer :( C) Lithium

👒2]. The element present in the largest amount in rocks and minerals is
       🔹(A) Carbon
       🔹(B) Silicon
       🔹(C) Hydrogen
       🔹(D) Aluminum

🐙Answer: (B) Silicon

👒3]. Air is a/an —
       🔹(A) Compound
       🔹(B) Element
       🔹(C) Mixture
       🔹(D) Electrolyte

🐙Answer: (C) Mixture

👒4].Which of the following is the best conductor of Electricity?
       🔹(A) Ordinary water
       🔹(B) Sea water
       🔹(C) Boiled water
       🔹(D) Distilled water

🐙Answer: (B) Sea water

👒5]. The most abundant metal in the earth’s crust is
       🔹(A) Zinc
       🔹(B) Copper
       🔹(C) Aluminum
       🔹(D) Iron

🐙Answer: (C) Aluminum

👒6]. The gas used to extinguish fire is
       🔹(A) Neon
       🔹(B) Nitrogen
       🔹(C) Carbon dioxide
       🔹(D) Carbon Monoxide

🐙Answer: (C) Carbon dioxide

👒7]. The element common to all acids is
      🔹(A) Oxygen
      🔹(B) Hydrogen
      🔹(C) Nitrogen
      🔹(D) Sulphur

🐙Answer: (B) Hydrogen

👒8]. Gobar gas contains mainly
       🔹(A) Methane
       🔹(B) Carbon dioxide
       🔹(C) Butane
       🔹(D) Carbon Monoxide

🐙Answer:  (A) Methane

👒9]. 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

🐙Answer:  (D) Iron, Chromium and Nickel

👒10]. Balloons are filled with —
       🔹(A) Helium
       🔹(B) Oxygen
       🔹(C) Nitrogen
       🔹(D) Argon

🐙Answer: (A) Helium

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