NSO 7th grade test
Quiz
•
Science
•
7th Grade
•
Practice Problem
•
Hard
Sanhitha G
Used 43+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In an experiment demonstrating oxygen evolution in Hydrilla, sodium bicarbonate is added to water in the experimental set-up. What would happen if all other conditions are favorable?
Amount of oxygen evolved decreases as carbon dioxide in waste is absorbed by sodium bicarbonate
Amount of oxygen evolved decreases as the availability of carbon dioxide increases
Amount of oxygen evolved increases as the availability of carbon dioxide increases
Amount of oxygen evolved increases as carbol dioxide in water is absorbed by sodium bicarbonate
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following statements is incorrect?
The process of unwinding the silk filaments from the cocoon and combining them together to make thread of raw silk is called bailing
Silk fabrics have a good moisture absorbing capacity
Merino is an exotic breed of sheep
Woollen fibres obtained from the hair present on the body of the wool-yielding animals trap a lot of air
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When you heat a system, its temperature
Always increases
Sometimes decreases
May stay the same
Always goes up or down, depending on the heat
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following processes represents a neutralisation reaction?
Applying vinegar on wasp sting
Brushing our teeth with toothpaste
Reaction of sodium hydroxide with hydrochloric acid to form sodium chloride
All of the above
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Rishab was performing an experiment with a blue coloured solution (X) in a breaker. By mistake a shaving blade fell into the beaker. After half an hour, he found that the colour of the solution in the beaker changed to green (Y). What could be the solutions to X and Y respectively?
Copper sulphate, Iron sulphate
Iron sulphate, Copper sulphate
Iron sulphate, Zinc sulphate
Copper sulphate, Zinc sulphate
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Read the given statements and select the incorrect one
The sun rays become more and more slanting as the latitude increases
Slanting rays spread over a large surface area than vertical rays
Sun rays fall vertically near the equator
None of these
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The energy required to form and sustain a cyclone is provided by
Kinetic energy of blowing wind
Fast moving waves in the sea
Vaporisation of water
Condensation of water vapor
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