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
Rate of evaporation of petrol is greater than that of water at room temperature because: Read More »
Everyday Science Mcqs 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_____________?
A. Ice
B. Diamond
C. Sucrose
D. Plastic
All of the following substances are crystalline except_____________? Read More »
Chemistry Mcqs, Everyday Science McqsSome 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?
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.
Which of the following is a substance? Read More »
Chemistry Mcqs, Everyday Science McqsAn 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
An atom is_____________? Read More »
Everyday Science McqsAll 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
All of the following statements are incorrect except: Read More »
Everyday Science McqsThe 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 average speed of a moving object during a given interval of time is always: Read More »
Everyday Science McqsThe SI base unit for mass is_____________?
A. Gram
B. Pound
C. Kilogram
D. Ounce
The SI base unit for mass is_____________? Read More »
Everyday Science McqsWhich of the following is closest to a yard in length?
A. 0.01m
B. 0.1m
C. 1m
D. 10m
E. 100m
Which of the following is closest to a yard in length? Read More »
Everyday Science Mcqs