DoE Delhi Assessment Worksheet Solution Class 10th Science

ENGLISH MEDIUM 1st ASSESSMENT  :- SCIENCE

Question 1 :- Symbol of sodium , copper and magnesium are respectively ?

• Na, Cu and Mg

Question 2 :- Symbol of chlorine and chloride are respectively ?

• Cl and Cl-

Question 3 :- Formula formed by the combination of silver and iodine is ?

• AgI

Question 4 :- Valency of Potassium and chlorine are respectively ?

• +1 and -1

Question 5 :- The correct formula of calcium phosphate is ?

• Ca3(PO4)2

Question 6 :- The atom of the same element having the same atomic number but different mass numbers are ?

• Isotopes

Question 7 :- Calcium formula of aluminium hydroxide age ?

• Al (OH)3

Question 8 :- Atomic number of an atom is equal to presents in an atom ?

• Number of electrons and protons

Question 9 :- Sodium is written as any which indicate that it is ?

• atomic number 11 and mass number 23

Question 10 :- Mg(OH)2 known As ?

• Milk of Magnesia or Magnesium hydroxide