A. 80%
B. 30%
C. 40%
D. 20%
Percentage of calcium in calcium carbonate is___________________? Read More »
Chemistry Basic Concept, Chemistry Mcqs A. 154
B. 280
C. 86
D. 300
How many isotopes have odd atomic number ? Read More »
Chemistry Basic Concept, Chemistry Mcqs A. 0.25
B. 0.5
C. 0.75
D. 1
The number of moles of CO2 which contains 16 g of oxygen is__________________? Read More »
Chemistry Basic Concept, Chemistry Mcqs A. 2.24 dm3
B. 22.4 dm3
C. 1.12 dm3
D. 112 dm3
The volume occupied by 2.8 g of N2 at STP______________________? Read More »
Chemistry Basic Concept, Chemistry Mcqs A. oxygen
B. carbon
C. tin
D. chlorine
Which one of the following has the maximum number of isotopes ? Read More »
Chemistry Basic Concept, Chemistry Mcqs A. 0.18 mole
B. 0.27 mole
C. 0.24 mole
D. 0.09 mole
A. formula unit
B. empirical formula
C. molecular formula
D. formula mass
Which of the following terms is not used for ionic compound ? Read More »
Chemistry Basic Concept, Chemistry Mcqs A. 280
B. 300
C. 154
D. 54
A. 6.022 x 1023 atoms of oxygen
B. 22-gram electrons
C. 6.022 x 1023 atms of carbon
D. both B. & C.
One mole of CO2 contains? Read More »
Chemistry Basic Concept, Chemistry Mcqs A. Isotopes with odd atomic number are abundant
B. Isotopes with odd atomic number and even mass number are abundant
C. Isotopes with even atomic number and even mass number are abundant
D. Isotopes with even atomic number and odd mass no are abundant
Which of the following statements about isotopes is correct ? Read More »
Chemistry Basic Concept, Chemistry Mcqs