Who discovered that nucleus is very small and have positive charge?

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• The number of allotropes of phosphorus in solid state is?
  • (A) 2
  • (B) 3
  • (C) 4
  • (D) 6
  ►Correct Option
  
  Correct Option is: C
  

• Copper forms colorless bead in borax bead test in reducing flame. The oxidation state of copper is?
  • (A) +1
  • (B) +2
  • (C) +3
  • (D) +4
  ►Correct Option
  
  Correct Option is: A
  

• Which element is deposited at the cathode during the electrolysis of brine in Nelson cell?
  • (A) H₂
  • (B) Cl₂
  • (C) Na
  • (D) O₂
  ►Correct Option
  
  Correct Option is: C
  

• Rectified spirit is converted to absolute alcohol by the dehydrating agent?
  • (A) Sulphuric Acid
  • (B) Soda Lime
  • (C) Lime
  • (D) All of the above
  ►Correct Option
  
  Correct Option is: B
  

• Which of the following salt is fairly soluble in water?
  • (A) BeF₂
  • (B) MgF₂
  • (C) BaF₂
  • (D) LiF
  ►Correct Option
  
  Correct Option is: D
  

• A metal does float on water gives vigorous reaction with water so much that it reacts with ice at -100 Degree Centigrade. The metal is?
  • (A) Na
  • (B) Cs
  • (C) Li
  • (D) K
  ►Correct Option
  
  Correct Option is: A
  

• Which of the following hybrids is highly unstable?
  • (A) SbH₃
  • (B) PH₃
  • (C) BiH₃
  • (D) AsH₃
  ►Correct Option
  
  Correct Option is: B
  

• Which of the following is least polar?
  • (A) AlCl₃
  • (B) SiCl₄
  • (C) PCl₃
  • (D) S₂Cl₂
  ►Correct Option
  
  Correct Option is: B