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MCQs

Total Questions : 1678 | Page 45 of 168 pages
Question 441. Chemical equations do not tell about
  1.    Reactants
  2.    Products
  3.    Rate of reaction
  4.    Conditions and rate of reaction
 Discuss Question
Answer: Option D. -> Conditions and rate of reaction
Answer: (d).Conditions and rate of reaction
Question 442. The soul of chemistry is dealing with___________?
  1.    Internal structural changes in matter
  2.    Composition of matter
  3.    Properties of matter
  4.    Composition and properties of matter
 Discuss Question
Answer: Option D. -> Composition and properties of matter
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 443. Sodium carbonate is produced by____________?
  1.    haber process
  2.    Amonia solvay process
  3.    decons process
  4.    lead chamber process
 Discuss Question
Answer: Option B. -> Amonia solvay process
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 444. Which of the following is a substance?
  1.    Sea water
  2.    Brass
  3.    Tape water
  4.    Graphite
  5.    Sand
 Discuss Question
Answer: Option D. -> Graphite
IN CHEMISTRY, A SUBSTANCE REFERS TO A MATTER WHICH HAS SPECIFIC COMPOSITION AND SPECIFIC PROPERTIES WHICH DO NOT CHANGE. A SUBSTANCE CAN BE AN ELEMENT OR A COMPOUND. A SUBSTANCE TYPICALLY HAS A CONSTANT COMPOSITION, WHICH CAN NOT BE SEPARATED BY PHYSICAL METHODS. SEAWATER AND SAND ARE NOT SUBSTANCES, BECAUSE THEY HAVE VARIED COMPOSITIONS AND THEIR COMPONENTS CAN BE SEPARATED BY PHYSICAL METHODS.
Question 445. Electron was discovered by?
  1.    Michael Faraday
  2.    James Maxwell
  3.    Yuri Gagarin
  4.    J.J Thomson
 Discuss Question
Answer: Option D. -> J.J Thomson
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 446. The radioactive isotope of hydrogen is called___________?
  1.    tritium
  2.    deuterium
  3.    protium
  4.    ortho-hydrogen
 Discuss Question
Answer: Option A. -> tritium
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 447. Some substances are good conductor of electricity in both the solid and liquid states. These substances are generally______________?
  1.    ionic substances
  2.    metallic substances
  3.    molecular solids
  4.    covalent network solids
 Discuss Question
Answer: Option B. -> metallic substances
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 448. All of the following substances are crystalline except_____________?
  1.    Ice
  2.    Diamond
  3.    Sucrose
  4.    Plastic
 Discuss Question
Answer: Option D. -> Plastic
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 449. Covalent network crystals have_____________?
  1.    higher melting point then molecular crystals
  2.    lower melting point then molecular crystals
  3.    discrete molecules linked by Van der waals forces
  4.    hydrogen bonding
 Discuss Question
Answer: Option A. -> higher melting point then molecular crystals
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 450. What is a mixture of Potassium Nitrate Powdered Charcoal and Sulphur called?
  1.    Paint
  2.    Glass
  3.    Gun Powder
  4.    Cement
 Discuss Question
Answer: Option C. -> Gun Powder
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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