A. 1.00 gram
B. 4.00 gram
C. 8.00 gram
D. 4 x 6.02 x 1023 gram
✅ The correct answer is option B.
Chemistry MCQs
Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be
A. 02:16:02
B. 02:16:01
C. 01:16:02
D. 01:01:01
✅ The correct answer is option C.
The inert gases are ____ in water
A. sparingly soluble
B. insoluble
C. soluble
D. None of these
✅ The correct answer is option A.
The number of g-molecule of oxygen in 6.02 x 1024CO molecules is
A. 1 gram of molecule
B. 0.5 gram of molecule
C. 5 gram of molecule
D. 10 gram of molecule
✅ The correct answer is option C.
The gas used in the manufacture of vanaspati from vegetable oil is
A. hydrogen
B. oxygen
C. nitrogen
D. carbon dioxide
✅ The correct answer is option A.
The hydronium ion is
A. H+
B. HO –
C. H2+
D. H3O+
✅ The correct answer is option D.
The most malleable metal is
A. platinum
B. silver
C. iron
D. gold
✅ The correct answer is option D.
The method of concentrating the ore which makes use of the difference in density between ore and impurities is called
A. liquation
B. leaching
C. levigation
D. magnetic separation
✅ The correct answer is option C.
The number of electrons presents in H+ is
A. zero
B. one
C. two
D. three
✅ The correct answer is option A.
H+ is a hydrogen ion, and it is an ion because it LOST an electron. Electrons are negatively charged. When an atom gains electrons it will have NEGATIVE charges.
H+ is a hydrogen ion, and it is an ion because it LOST an electron. Electrons are negatively charged. When an atom gains electrons it will have NEGATIVE charges.
So it has zero electron.
The gas present in the stratosphere which filters out some of the sun’s ultraviolet light and provides an effective shield against radiation damage to living things is
A. helium
B. ozone
C. oxygen
D. methane
✅ The correct answer is option B.