Which of the following is a diverse group of hydrophobic molecules?
A. Carbohydrates
B. Lipids
C. Proteins
D. Nucleic acids
Everyday Science Mcqs
What is the chemical formula for Sulfuric acid?
What is the chemical formula for Sulfuric acid?
A. C2H6O
B. CaSO4
C. C2H4O2
D. H2SO4
The M.K.S. system was first introduced by _________ ?
The M.K.S. system was first introduced by _________ ?
A. Giorgi
B. Archimedes
C. Eienstein
D. Newton
The M.K.S. system was first introduced Giorgi.
M stands for meters.
K stands for kilograms.
S stands for seconds.
These three units work together with various equations. They are three basic units within the SI system. Many other units can be described using those three units. For example, a Newton (unit of force) is a kg m/s^2. A kilogram multiplied by a meter divided by seconds squared.
A mixture of sand and naphthalene can be separated by ________ ?
A mixture of sand and naphthalene can be separated by ________ ?
A. Chromatography
B. Fractional distillation
C. Sublimation
D. None of these
mixture of sand and naphthalene can be separated by “Sublimation”.
What is the chemical formula for Sodium carbonate _______ ?
What is the chemical formula for Sodium carbonate _______ ?
A. Na3CO2
B. CNa2O3
C. Na2CO3
D. Na3CO3
A ‘breath test’ used by traffic police to check drunken driving uses ____?
A ‘breath test’ used by traffic police to check drunken driving uses ____?
A. Turmeric on filter paper
B. Silica gel coated with silver nitrate
C. potassium permanganate-sulphuric acid
D. Potassium dichromatic-sulphuric acid
Brass gets discoloured in air because of the presence of which of the following gases in air ________ ?
Brass gets discoloured in air because of the presence of which of the following gases in air ________ ?
A. Carbon dioxide
B. Oxygen
C. Nitrogen
D. Hydrogen sulphide
Hydrogen bomb is based on the principle of ________ ?
Hydrogen bomb is based on the principle of ________ ?
A. Nuclear fusion
B. Artificial radioactivity
C. Natural radioactivity
D. Nuclear fission
Elements which have same number of protons but different number of neutrons are called as _________ ?
Elements which have same number of protons but different number of neutrons are called as _________ ?
A. Isotopes
B. Isomers
C. Allotropes
D. Allomers
Atoms which have the same number of protons but different numbers of neutrons in the nucleus are known as isotopes. Because of the difference in the number of neutrons, they will have the same atomic number, but varying atomic mass (or mass number).
Proton number is denoted by symbol __________ ?
Proton number is denoted by symbol __________ ?
A. M
B. Z
C. P
D. A
The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus. In an uncharged atom, the atomic number is also equal to the number of electrons.