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Some acids react with many materials and burn skin if they come in contact they are
cbsc
class 7
olympiad
science
chemistry
t2
asked
Aug 10, 2017
by
meena.p
1
answer
Haphazard movement of particles suspended in a liquid or gas caused by bombardment of particles by molecules of medium is
cbsc
class 7
olympiad
science
chemistry
t2
asked
Aug 10, 2017
by
meena.p
1
answer
At room temperature, most elements are in which phase of matter?
cbsc
class 7
olympiad
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chemistry
t2
asked
Aug 10, 2017
by
meena.p
1
answer
Salt, sugar, chalk, sand are all
cbsc
class 7
olympiad
science
chemistry
t2
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Aug 10, 2017
by
meena.p
1
answer
Nitric acid combines with oxygen to produce brown fumes of
cbsc
class 7
olympiad
science
chemistry
t2
asked
Aug 10, 2017
by
meena.p
1
answer
When a solid substance is heated, individual molecules
cbsc
class 7
olympiad
science
chemistry
t2
asked
Aug 10, 2017
by
meena.p
1
answer
On a hot day, a glass containing ice water slowly collects liquid on the outside of the glass. Which statement best explains where this liquid come from?
cbsc
class 7
olympiad
science
chemistry
t2
asked
Aug 10, 2017
by
meena.p
1
answer
A group of students predicts that folding an index card into a different shape will result in a chemical change. Which step of the scientific process is this?
cbsc
class 7
olympiad
science
chemistry
t2
asked
Aug 10, 2017
by
meena.p
1
answer
Which gas in the atmosphere protects us from harmful ultraviolet radiations?
cbsc
class 7
olympiad
science
chemistry
t2
asked
Aug 10, 2017
by
meena.p
1
answer
To study changes that occur during photosynthesis
cbsc
class 7
olympiad
science
chemistry
t2
asked
Aug 10, 2017
by
meena.p
1
answer
To trace path of phosphorus, isotope of phosphorus is added to fertilizers. isotope is
cbsc
class 7
olympiad
science
chemistry
t2
asked
Aug 10, 2017
by
meena.p
1
answer
Study the given set up of an experiment . you will observe that
cbsc
class 7
olympiad
science
chemistry
t1
asked
Aug 10, 2017
by
meena.p
0
answers
A separation technique which uses a fractionating column to separate different liquid components in a mixture with different boiling points by heating mixture is called
cbsc
class 7
olympiad
science
chemistry
t1
asked
Aug 9, 2017
by
meena.p
1
answer
The temperature at which no more energy can be removed from matter is called
cbsc
class 7
olympiad
science
chemistry
t1
asked
Aug 9, 2017
by
meena.p
1
answer
Acids are found in many common chemicals, including foods. Acids taste:
cbsc
class 7
olympiad
science
chemistry
t1
asked
Aug 9, 2017
by
meena.p
1
answer
The effect of sting of an ant can be neutralised by rubbing with
cbsc
class 7
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chemistry
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Aug 9, 2017
by
meena.p
1
answer
In hydroponics, plant's roots are immersed in solution of dissolved
cbsc
class 7
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chemistry
t1
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Aug 9, 2017
by
meena.p
1
answer
When fizzy drinks are made by adding compressed carbon dioxide acid is formed by mixing which is
cbsc
class 7
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chemistry
t1
asked
Aug 9, 2017
by
meena.p
2
answers
If mass of a substance will be lowered its density will be
cbsc
class 7
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t1
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Aug 9, 2017
by
meena.p
2
answers
Element which is non-metal and is found on right side of periodic table is
cbsc
class 7
olympiad
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chemistry
t1
asked
Aug 9, 2017
by
meena.p
1
answer
When iron and Sulphur are mixed together at room temperature there is lack of
cbsc
class 7
olympiad
science
chemistry
t1
asked
Aug 9, 2017
by
meena.p
1
answer
A large amount of heat is produced in power plants while energy is released which turns
cbsc
class 7
olympiad
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chemistry
t1
asked
Aug 9, 2017
by
meena.p
2
answers
Which gas is produced when sludge is digested?
cbsc
class 7
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chemistry
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Aug 9, 2017
by
meena.p
1
answer
An iron weight at $45$ degree celcius is dipped in a bucket containing water at $45$ degree celcius . The heat will
cbsc
class 7
olympiad
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chemistry
t1
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Aug 9, 2017
by
meena.p
1
answer
The densest element so far is
cbsc
class 7
olympiad
science
chemistry
t1
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Aug 9, 2017
by
meena.p
1
answer
Which of the following colours is given by the phenolphthalein in a basic salt solution.
cbsc
class 7
olympiad
science
chemistry
t1
asked
Aug 9, 2017
by
meena.p
1
answer
Organisms of a trophic level that feed on several types of organisms in the lower trophic level constitute the ____. Such interconnected ones are called the _____.
cbsc
class
10
biology
olympiad
t10
asked
Aug 1, 2017
by
priyanka.c
1
answer
Disposable plastic plates should not be used because
cbsc
class
10
biology
olympiad
t10
asked
Aug 1, 2017
by
priyanka.c
1
answer
Construct a food chain from these organisms. <br><br>Snake, Rat, Seeds, Eagle
cbsc
class
10
biology
olympiad
t10
asked
Aug 1, 2017
by
priyanka.c
1
answer
Organisms that feeds on herbivores are placed in
cbsc
class
10
biology
olympiad
t10
asked
Aug 1, 2017
by
priyanka.c
1
answer
Accumulation of non biodegradable pesticides in the food chain in increasing amount at each trophic level is known as
cbsc
class
10
biology
olympiad
t10
asked
Aug 1, 2017
by
priyanka.c
1
answer
Vestigial organs are
cbsc
class
10
biology
olympiad
t10
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Aug 1, 2017
by
priyanka.c
1
answer
A basket of vegetable contains carrot, potato, radish and tomato. Which one of the following represents correct homologus structures?
cbsc
class
10
biology
olympiad
t10
asked
Aug 1, 2017
by
priyanka.c
1
answer
Which among the following is not the function/s of the testes at puberty? <br>i. Formation of germ cells <br>ii. Secretion of testosterone <br>iii. Development of placenta <br>iv. Secretion of estrogen
cbsc
class
10
biology
olympiad
t10
asked
Aug 1, 2017
by
priyanka.c
1
answer
Identify the correct sequence of events of asexual reproduction in a flower
cbsc
class
10
biology
olympiad
t10
asked
Aug 1, 2017
by
priyanka.c
1
answer
Binary fission is seen in
cbsc
class
10
biology
olympiad
t10
asked
Aug 1, 2017
by
priyanka.c
1
answer
In a synapse, chemical signal is transmitted from
cbsc
class
10
biology
olympiad
t10
asked
Aug 1, 2017
by
priyanka.c
1
answer
Fruits are artificially ripened by using
cbsc
class
10
biology
olympiad
t10
asked
Aug 1, 2017
by
priyanka.c
1
answer
Sympathetic nervous system is a component of
cbsc
class
10
biology
olympiad
t10
asked
Aug 1, 2017
by
priyanka.c
1
answer
The event that does not occur in photosynthesis is
cbsc
class
10
biology
olympiad
t10
asked
Aug 1, 2017
by
priyanka.c
1
answer
Valve present between left atrium and left ventricle is
cbsc
class
10
biology
olympiad
t10
asked
Aug 1, 2017
by
priyanka.c
1
answer
Kulhs are irrigation canals of
cbsc
class
10
biology
olympiad
t9
asked
Aug 1, 2017
by
priyanka.c
1
answer
Bacteria found in the river Ganges when highly polluted is
cbsc
class
10
biology
olympiad
t9
asked
Aug 1, 2017
by
priyanka.c
1
answer
An effect of deforestation is
cbsc
class
10
biology
olympiad
t9
asked
Aug 1, 2017
by
priyanka.c
1
answer
The percentage of solar radiation absorbs by all green plants for photosynthesis
cbsc
class
10
biology
olympiad
t9
asked
Aug 1, 2017
by
priyanka.c
1
answer
Which of the following limits the number of trophic levels in a food chain?
cbsc
class
10
biology
olympiad
t9
asked
Aug 1, 2017
by
priyanka.c
1
answer
A gamete contains
cbsc
class
10
biology
olympiad
t9
asked
Jul 31, 2017
by
priyanka.c
1
answer
In pea plants, a pure tall plant (TT) is crossed with a short plant (tt). The ratio of pure tall plant to short plants in F2 is
cbsc
class
10
biology
olympiad
t9
asked
Jul 31, 2017
by
priyanka.c
1
answer
The book "Origin of Species" was written by
cbsc
class
10
biology
olympiad
t9
asked
Jul 31, 2017
by
priyanka.c
1
answer
Characters transmitted from parents to offspring are present in
cbsc
class
10
biology
olympiad
t9
asked
Jul 31, 2017
by
priyanka.c
1
answer
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