Living organisms which are invisible to naked eye are known as

Which of the following instrument is used to see microorganisms?

Find the odd man out

Choose the correct option with respect to molds

Choose the incorrect pair among the following

Chicken pox is disease caused by

Microorganisms have ability to survive in environment like

Choose correct statement with respect to microorganisms

Which bacteria converts milk into curd?

Lactobacillus is used in preparation of _______

Fermentation is the process of conversion of

Choose the correct pair among the following

Medicines which kills disease causing microorganisms are known as

Among the following which bacteria fixes atmospheric nitrogen

Choose the correct option with respect to microorganisms in our environment

Microbes causing diseases, in humans, plants and animals are called as

Choose correct option for the statement," Diseases passing form infected body to healthy body is called as communicable disease"

Communicable disease transfer from one person to other through ______ medium

Arrange the given situation in correct order-
a. Virus get transferred through air
b. Infected person sneezes
c. Healthy person breathes air and gets infected
d. Through sneeze virus are released in air

Choose the incorrect pair

Cholera is ______

Choose the incorrect pair among the following

Which is the preventive measures for disease of malaria?

Choose correct options for "the food item attacked by microorganisms"

For food preservation we add _______ in food.

Pickles are preserved from the attack of microorganisms by adding

Sodium metabisulphite is used in preservation of

Choose the incorrect pair

Milk is preserved by

Which of the following is method of food preservation?

In method of pasteurization milk is heated at _______ temperature

Method of pasteurization was discovered by _______

Atmosphere is consist of 78% of

Nitrogen is part of ______ in living organisms

Atmospheric nitrogen is taken by plants with help of _______ bacteria

Nitrogen fixation is carried out by
a. streptococcus
b. lactobacillus
c. blue green algae
d. Rhizobium

Arrange the following in correct order
a.Human receive proteins and other nitrogen compounds
b.Bacteria fixes the atmospheric nitrogen
c.Synthesis of plant protein
d. useful compounds of nitrogen are absorbs by the plant roots

Natural fibres are obtained from _______

Which of the following is natural fibre?

find the odd man out

Synthetic fibres are made up of

Which of the following is the property of synthetic fibres?

Absorption in synthetic fibres is less because

Fibres which made by chemical treatments and technological innovations are called

Alternative to silk is

Which of the following is not the property of rayon?

Which of the following is not the use of rayon?

Choose the correct option for the fibre used to make seat belts in car.

Nylon is prepared from

Choose incorrect pair among the following

Nylon fibres are stronger than-

Polyester is used to make

In plastic unit of polymers are joined in

Plastic can be moulded in any shape by applying

Process in which old plastic is used to make new articles is called

Which type of plastic changes its shape on heating?

Find the odd man out

Which of the following option is false for thermosetting plastic?

Find the odd man out

Choose incorrect pair among the following

Plastic bottles get corroded when exposed to moisture. Choose correct option for given statement

Which of the following is not the property of plastic?

Which of the following is lighter in weight?

Heat resistant dresses are made up of?

Which of the following items will last for long duration?

Waste which are decomposed by microorganisms are called

Waste which cannot be decomposed by microorganisms are called

Find the odd man out

Choose the correct method to minimize the usage of plastic
a. Use of jute bags and cotton bags
b. Recycling the plastic materials to make new objects
c. Burning plastic bag
d. Reusing plastic bottles for tree plantation

Choose the incorrect pair with respect to time of decomposition of waste

Burning of plastics causes_______

One can save environment by using _______ for usage of plastics

Lustre is the property of

Brittleness is the property of

Choose incorrect option with respect to metals

Which of the following can conduct heat

Conduction of heat and electricity is property of

Ductility is _______

Find the odd man out with respect to non metals

Choose the incorrect option among the following

Find odd man out

Properties of metals to change their shape is called as

Reaction of metals with oxygen leads in formation of

Copper when exposed to moist air forms green colored layer of

Metal oxides are _______ in nature

Non metals on reaction with oxygen

Complete the following sentence, "Metals react with water _______"

Choose correct option with respect to reaction of metals with nonmetals

What happens when sodium reacts with water kept in beaker?

Rust when reacts with water turns

Metal + _______ → Metal oxide

Fe + O₂ + H₂O → _____ + H₂

Substances which turn blue litmus paper red are called

Bases are the substance that _______

Reaction of metals with acids produces

Non metals reacts with acids to form

Consider small amount of metal added to dilute hydrochloric acid in a test tube, What will happen to a burning matchstck if brought near the testtube?

What happens when non metal is added to dilute sulphuric acid in test tube?

Metals on reaction with bases produces

When one element displaces another element in aqueous solution, then such reaction is called

Complete the following reaction
CuSO₄ + Zn → _______ + _______

Complete the following reaction
______ + _______→ FeSO₄ +Cu

Which of the following are uses of iron?
a. Used for making machinery
b. Used in making alloys
c. Used in making paints
d. Used in making utensils

Choose correct option with respect to uses of copper:

Which of the following element is used in making paints?

Silver compounds are used in

Which of followings are uses of oxygen?
a.Used in the process of respiration
b.Facilitates in combustion reaction
c.Fuel in aeroplane and missile

Which of the following option is used in the manufacture of fertilizers?

Choose incorrect option among the following:

Choose the correct option for uses of chlorine

Fossil fuels are obtained from ______

Find the odd man out

Natural resources are classified into

Resources present in unlimited quantity are called

Find the odd man out from the given options

Resources which are present in limited quantity in nature is called as

Coal is used as fuels in

Process of formation of coal is called as

Coal is found in ______ type

______ is purest form of coal

Coal tar is used in making

Arrange in correct order to get the formation of coal
a. decomposition of plants and animals by bacteria
b. occurrence of natural calamities allow burying of plants and animal
c. removal of oxygen and hydrogen
d. formation of compact stony substance

Light weight vehicle require ______

Trucks require ______ as a fuel

Petroleum is ______ than water

Arrange the following in correct order
a. Absence of air and high temperature pressure, dead organisms are converted into petroleum and natural gas
b. Petroleum floats on water and remains compressed due to natural gas
c. Dead organisms gets deposited

Oil is found in

Crude oil contains _______

Process of separating different components of liquid is called

Among the given option which one has lowest boiling point

Paraffin wax is used for making

Choose the correct option for bitumen

Natural gas consist of _______

Natural gas is

In India, natural gas is found in

Compressed Natural Gas is