A. 1.8 gram of H2O
B. 12 moles of KMnO4
C. 0.6N H2SO4
D. 4.6 gram of C2H5OH
✅ The correct answer is option B.
Chemistry MCQs
The most electropositive elements among the following is
A. Na
B. Ca
C. K
D. Cs
✅ The correct answer is option D.
The maximum number of covalent formed by nitrogen is
A. 1
B. 2
C. 3
D. 4
✅ The correct answer is option D.
The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is
A. Dalton’s law
B. Gay Lussac’s law
C. Henry’s law
D. Raoult’s law
✅ The correct answer is option C.
The ionic radii of N3-, O2-, F- and Na+ follows the order
A. N3- > O2- > F- > Na+
B. N3- > Na+ > O2- > F-
C. Na+ > O2- > N3- > F-
D. O2- > F- > Na+ > N3-
✅ The correct answer is option A.
The method that cannot be used for removing permanent hardness of water is
A. adding sodium carbonate
B. distillation
C. adding caustic soda
D. boiling
✅ The correct answer is option D.
The molecular formula of phosphorous is
A. P1
B. P2
C. P3
D. P4
✅ The correct answer is option D.
The metal that is used as a catalyst in the hydrogenation of oils is
A. Ni
B. Pb
C. Cu
D. Pt
✅ The correct answer is option A.
What are the number of moles of CO2 which contains 16 g of oxygen?
A. 0.5 mole
B. 0.2 mole
C. 0.4 mole
D. 0.25 mole
✅ The correct answer is option A.
One mole of CO2 has mass of 44 g and 32 g of O2. So 16 g of O2 have 22 g of CO2 or 0.5 moles of it.
One mole of CO2 has mass of 44 g and 32 g of O2. So 16 g of O2 have 22 g of CO2 or 0.5 moles of it.
The nuclear particles which are assumed to hold the nucleons together are
A. electrons
B. positrons
C. neutrons
D. mesons
✅ The correct answer is option D.