Science Quiz

Science Quiz For Class 7

chemistry

Science Quiz Class 7

Congratulations - you have completed %%Science Quiz%%. You scored %%SCORE%% out of %%TOTAL%%.  
Your answers are highlighted below.
Question 1
From which part of the plant does maximum loss of water through transpiration take place?
A
Cuticle
B
Rhizoids
C
Stomata
D
Lenticles
Question 1 Explanation: 
Transpiration takes place through the stomata which are present on the leaves of the plants and delicate organs, is called stomatal transpiration. The maximum amount of water is lost by this transpiration. About 80% to 90% transpiration occurs through the stomata.
Question 2
Which of these can respire in the absence of oxygen
A
Parasites
B
Symbiotants
C
Anaerobes
D
Scavengers
Question 2 Explanation: 
Organisms which can respire in the absence of oxygen are known as anaerobes. The process of respiring in the absence of oxygen is known as anaerobic respiration.
Question 3
Identify the plant part that does not help in respiration.
A
Xylem
B
Stomata
C
Leaves
D
Root Hair
Question 3 Explanation: 
Unlike animals and humans, plants do not have any specialized structures for gaseous exchange but they have stomata (present in leaves) and lenticels (present in stems) which are involved in the exchange of gases. Compared to animals and humans, plant roots, stems, and leaves respire at a very lower rate.
Question 4
Turmeric is a natural indicator. On adding its paste to acid and base separately, which colours would be observed
A
Yellow in both acid and base
B
Red in acid and blue in base
C
Yellow in acid and red in base
D
Pink in acid and yellow in base
Question 4 Explanation: 
Turmeric is a natural indicator. On adding its paste to acid and base separately it gives Yellow in acid and red in base.
Question 5
When the soil is too basic, plants do not grow well in it. To improve its quality what must be added to the soil?
A
Organic matter
B
Quick lime
C
Slaked lime
D
Calamine solution
Question 5 Explanation: 
Plants do not grow well when the soil is either too acidic or too basic. If the soil is basic, organic matter is added to it. Organic matter releases acids which neutralise the excess bases present in the soil and reduces its basic nature.
Question 6
Which of the following set of substances contain acids?
A
Vinegar, soap
B
Grapes, lime water
C
Curd, milk of magnesia
D
Curd, vinegar
Question 6 Explanation: 
Curd contains lactic acid and vinegar contains acetic acid.
Question 7
Products of a neutralisation reaction are always
A
an acid and a base
B
an acid and a salt
C
a salt and water
D
a salt and a base
Question 7 Explanation: 
Neutralization is the reaction of an acid and a base, which forms water and a salt.
Question 8
The normal temperature of human body is
A
37 k
B
37 degree Celsius
C
37 degree Fahrenheit
D
27 degree Celsius
Question 8 Explanation: 
The normal temperature of human body is 37 degree Celsius.
Question 9
Conduction takes place only in
A
Solid only
B
Gases only
C
Liquid only
D
Solid, Gas, Liquid
Question 9 Explanation: 
Conduction takes place only in Solid.
Question 10
What is the SI unit of pressure
A
Pascal
B
Joule
C
Newton
D
Ohm
Question 10 Explanation: 
For pressure, the SI system's basic unit is Pascal
Once you are finished, click the button below. Any items you have not completed will be marked incorrect. Get Results
There are 10 questions to complete.

About Umeshwar Pratihast

Leave a Reply

Your email address will not be published. Required fields are marked *