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WorksheetsPractice questions
Total questions: 25
Worksheet time: 13mins
A:- metals are sonorous
R:- They produce sound on being struck.
Assertion and reason both are correct and R is the correct explanation for A.
A and R both are correct but R is not the correct explanation for A
Assertion is true and the reason is false
Both the assertion and reason are false
Which is not a property of metal
Low specific gravity
Hard
High boiling and melting point
Ductile
Which among the given do not react with water
Zinc
Magnesium
Nitrogen
Aluminum
Metal found in liquid state at room temperature
Sodium
Magnesium
Aluminum
Mercury
Name a soft metal
Sulphur
Sodium
Copper
Iron
A:- Metals like Gold and silver are known as noble metals
R:- These metals are least reactive in nature.
A and R are correct and R is the correct explanation for A
A and R are correct but R is not the correct explanation for A
A is correct and R is false
Both A and R are false
It is also known as black gold
Coal
Petroleum
Natural gas
Electricity
The process of separating the fractions by fractional distillation is known as
Carbonisation
Drilling
Refining
Galvanization
Conversion of wood into coal is called
Destructive distillation
Refining
Carbonization
Anodizing
Which is the pure form of carbon
Coal tar
Coal has
Charcoal
Coke
Product of petroleum used in jet aeroplane
Paraffin wax
Petroleum gas
Kerosene
LPG
Which petroleum product is used for surfacing roads?
Paraffin wax
Peat
Asphalt
Lignite
BHC, malathion, disyston etc are
Weedicides
Fungicides
Pesticides
Developing new varieties of crops by cross breeding is called
Emasculation
Hybridization
Carbonization
Plant breeding
A:- Removal of anther from plants is known as emasculation.
R:- breeding means producing offspring.
A and R are correct and R is the correct explanation for A
A and R are correct but R is not the correct explanation for A
A is true and R is false
Both A and R are false
A:- Rice is a rabi crop
R:- Rabi crops are sown at the beginning of the monsoon.
A and R are correct and R is the correct explanation for A.
A and R are correct but R is not the correct explanation for A
A is true and R is false
Both A and R are false
Which of these does not add nutrients in the soil
Field fallow
Crop rotation
Mixed cropping
Ploughing
A protozoa that has chlorophyll and can be called autotroph
Amoeba
Paramecium
Laminaria
Euglena
Antibiotic penicillin is made from
Fungi
Virus
Protozoa
Algae
Yeast is a unicellular
Virus
Bacteria
Fungi
Algae
Cell wall is unique to plant cell this was concluded by
Scleiden
Schwaan
Alexander Fleming
Edward Jenner
Power house of the cell
Nucleus
Mitochondria
Çytploplasm
Ribosome
All cells are living in nature
False
True
A: antibiotics fight against bacterial infections.
R: antibiotics are made from bacteria and fungi.
A and R are correct and R is the correct explanation for A
A and R are correct but R is not the correct explanation for A
A is true and R is false
Both A and R are false
Nucleus and cytoplasm together make
Cell membrane
Nucleolus
Protoplasm
Cell wall
