Rate of evaporation of petrol is greater than that of water at room temperature because:
A. petrol molecules do not have any hydrogen bond
B. petrol is an organic compound
C. water molecules have small size
D. petrol molecules have greater size
Everyday Science Mcqs
Honey contain glucose and fructose along with some other ingredients, it has greater viscosity due to____________?
Honey contain glucose and fructose along with some other ingredients, it has greater viscosity due to____________?
A. hydrogen bonding
B. irregular shape of the molecules
C. irregular shape of the molecules and strong inter-molecular forces
D. greater molecular size
All of the following substances are crystalline except_____________?
All of the following substances are crystalline except_____________?
A. Ice
B. Diamond
C. Sucrose
D. Plastic
Some substances are good conductor of electricity in both the solid and liquid states. These substances are generally______________?
Some substances are good conductor of electricity in both the solid and liquid states. These substances are generally______________?
A. ionic substances
B. metallic substances
C. molecular solids
D. covalent network solids
Which of the following is a substance?
Which of the following is a substance?
A. Sea water
B. Brass
C. Tape water
D. Graphite
E. Sand
In chemistry, a substance refers to a matter which has specific composition and specific properties which do not change. A substance can be an element or a compound. A substance typically has a constant composition, which can not be separated by physical methods. Seawater and sand are not substances, because they have varied compositions and their components can be separated by physical methods.
An atom is_____________?
An atom is_____________?
A. smallest indivisible particle in an element
B. smallest particle of an element which can undergo a chemical reaction
C. building block of an element
D. always smaller than molecule
All of the following statements are incorrect except:
All of the following statements are incorrect except:
A. Precision and accuracy should go side by side in a scientific work
B. Scientific work must be precise, accuracy is not essential
C. Scientific work must be accurate, precision is not essential
D. Calculations must be made before any experiment
The average speed of a moving object during a given interval of time is always:
The average speed of a moving object during a given interval of time is always:
A. the magnitude of its average velocity over the interval
B. the distance covered during the time interval divided by the time interval
C. one-half its speed at the end of the interval
D. its acceleration multiplied by the time interval
E. one-half its acceleration multiplied by the time interval
The SI base unit for mass is_____________?
The SI base unit for mass is_____________?
A. Gram
B. Pound
C. Kilogram
D. Ounce
Which of the following is closest to a yard in length?
Which of the following is closest to a yard in length?
A. 0.01m
B. 0.1m
C. 1m
D. 10m
E. 100m