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Recent questions tagged chemistry
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Period number of element indicates
cbsc
class 9
olympiad
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chemistry
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Sep 5, 2017
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meena.p
1
answer
What is a multivalent ion?
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class 9
olympiad
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chemistry
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Sep 5, 2017
by
meena.p
1
answer
If Z represents the atomic number and A represents mass number then the number of electrons in an atom can be computed as
cbsc
class 9
olympiad
science
chemistry
t6
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Sep 5, 2017
by
meena.p
1
answer
Molarity of solution which contains $40\; g$ urea dissolved in $500cm^3$ is
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class 9
olympiad
science
chemistry
t6
asked
Sep 5, 2017
by
meena.p
1
answer
Energy of an electron in orbit is proportional to
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class 9
olympiad
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chemistry
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Sep 5, 2017
by
meena.p
1
answer
As size of atom increases down group, electro positivity
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class 9
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chemistry
t6
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Sep 5, 2017
by
meena.p
1
answer
Which of the following has highest intermolecular forces of attraction?
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class 9
olympiad
science
chemistry
t6
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Sep 5, 2017
by
meena.p
1
answer
Arun, Deepa, Uma and Priya were asked to select a plant material which would not give blue black colour with iodine solution. Who did not select the right material ?
cbsc
class 9
olympiad
science
chemistry
t6
asked
Sep 5, 2017
by
meena.p
1
answer
Which of the following statement is not true about colloidal solution ?
cbsc
class 9
olympiad
science
chemistry
t6
asked
Sep 5, 2017
by
meena.p
0
answers
Which of the following are physical changes? <br>(i) Melting of iron metal <br>(ii) Rusting of iron <br>(iii) Bending of an iron rod <br>(iv) Drawing a wire of iron metal
cbsc
class 9
olympiad
science
chemistry
t5
asked
Sep 5, 2017
by
meena.p
1
answer
An element X is tetravalent and another element Y is divalent . The compound formed by these two elements will be
cbsc
class 9
olympiad
science
chemistry
t5
asked
Sep 5, 2017
by
meena.p
1
answer
What happens/is likely to happen if the atoms within an element have full valence shells?
cbsc
class 9
olympiad
science
chemistry
t5
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Sep 5, 2017
by
meena.p
1
answer
Commercially concentrated HCl is
cbsc
class 9
olympiad
science
chemistry
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Sep 5, 2017
by
meena.p
1
answer
As we go from top to bottom in a group shielding effect
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class 9
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science
chemistry
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Sep 5, 2017
by
meena.p
1
answer
Pressure that vapors apply on surface of liquid at equilibrium is called
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class 9
olympiad
science
chemistry
t5
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Sep 5, 2017
by
meena.p
1
answer
Molecules of liquid which escape first have
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class 9
olympiad
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chemistry
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Sep 5, 2017
by
meena.p
1
answer
What is a polyatomic ion?
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class 9
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Sep 5, 2017
by
meena.p
1
answer
Two elements X and Y have the same atomic mass but their atomic numbers are 20 and 21 respectively . X and Y are
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class 9
olympiad
science
chemistry
t5
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Sep 5, 2017
by
meena.p
1
answer
Mercuric chloride is also know as?
chemistry
asked
Sep 5, 2017
by
eezuthapa00001
1
answer
What is the formula of Calgon?
chemistry
asked
Sep 5, 2017
by
eezuthapa00001
1
answer
A gases mixture it contain A,B,C,D gases.the mole fraction of Xb is 0.5 .ca
chemistry
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Sep 5, 2017
by
krish009.p
0
answers
The correct order of acidic nature of oxides is
chemistry
asked
Sep 4, 2017
by
divyasankhe30
1
answer
The number of atoms contained in one ccc cubic cell of a Monoatomic substa
chemistry
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Sep 4, 2017
by
vk462497
0
answers
Concentration of a dilute solution
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class 9
olympiad
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chemistry
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Sep 4, 2017
by
meena.p
1
answer
In Rutherford's experiment, α particles were deflected because of
cbsc
class 9
olympiad
science
chemistry
t5
asked
Sep 4, 2017
by
meena.p
1
answer
Elements which have properties of metals and non-metals are
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class 9
olympiad
science
chemistry
t5
asked
Sep 4, 2017
by
meena.p
1
answer
As solid melts to form liquid:
cbsc
class 9
olympiad
science
chemistry
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Sep 4, 2017
by
meena.p
1
answer
A student recorded the mass of dry raisins as $2.5\;g$ and the mass of raisins after soaking in water as $4 \;g$ . While performing the above experiment. The percentage of water absorbed by raisin is :
cbsc
class 9
olympiad
science
chemistry
t5
asked
Sep 4, 2017
by
meena.p
1
answer
Which of the following statement is not true about suspension ?
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class 9
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chemistry
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Sep 4, 2017
by
meena.p
1
answer
Solubility is amount of solute dissolved in
cbsc
class 9
olympiad
science
chemistry
t4
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Sep 4, 2017
by
meena.p
1
answer
Mathematical expression that describes Boyle's law is
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class 9
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chemistry
t4
asked
Sep 4, 2017
by
meena.p
1
answer
Oxidation state of group IIIA metals is
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class 9
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chemistry
t4
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Sep 4, 2017
by
meena.p
1
answer
An electrolytic cell uses electrical energy to drive
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class 9
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chemistry
t4
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Sep 4, 2017
by
meena.p
2
answers
On contact with oxygen, Rubidium forms
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class 9
olympiad
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chemistry
t4
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Sep 4, 2017
by
meena.p
1
answer
When we blow air into the balloon it inflates because:
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class 9
olympiad
science
chemistry
t4
asked
Sep 4, 2017
by
meena.p
1
answer
Which of the following is the correct set of apparatus for fractional distillation?
cbsc
class 9
olympiad
science
chemistry
t4
asked
Sep 4, 2017
by
meena.p
1
answer
Cathode rays have :
cbsc
class 9
olympiad
science
chemistry
t4
asked
Sep 4, 2017
by
meena.p
1
answer
Which of the following is not a postulate of Dalton’s atomic theory:
cbsc
class 9
olympiad
science
chemistry
t4
asked
Sep 4, 2017
by
meena.p
1
answer
The concentration of a solution indicates
cbsc
class 9
olympiad
science
chemistry
t4
asked
Sep 4, 2017
by
meena.p
1
answer
Filtration as a method of separation can be used for mixtures that are
cbsc
class 9
olympiad
science
chemistry
t4
asked
Sep 4, 2017
by
meena.p
1
answer
The movement of molecules from a higher concentration to a lower concentration is known as?
cbsc
class 9
olympiad
science
chemistry
t4
asked
Sep 4, 2017
by
meena.p
1
answer
In the electrolysis of molten zncl2. How much zn can be diposited at cathod
chemistry
asked
Sep 4, 2017
by
vikashpanjwani
0
answers
The n value of the valence shell of an element indicates its?
cbsc
class 9
olympiad
science
chemistry
t4
asked
Sep 4, 2017
by
meena.p
1
answer
When the electron is present in a particular orbit , it?
cbsc
class 9
olympiad
science
chemistry
t4
asked
Sep 4, 2017
by
meena.p
1
answer
The graph between log x/m vs logP straight line inclined at an angle 45 wit
chemistry
asked
Sep 3, 2017
by
ananyamondal0123
0
answers
when temperature is increased from 27 degree Celsius to 127 degree Celsius
chemistry
asked
Sep 3, 2017
by
ayush.buntygupta
0
answers
A vessel of irregular shape has a volume ‘V’. It is first evacuated amd
chemistry
asked
Sep 3, 2017
by
sunil.vodela
0
answers
Example of polar covalent bond
chemistry
asked
Sep 3, 2017
by
wowshivamadarsh
0
answers
Example of polar covalent bond
chemistry
asked
Sep 3, 2017
by
wowshivamadarsh
0
answers
Calculate change in entropy and change in enthalpy when 10 cubic decimeter
chemistry
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Sep 3, 2017
by
venkatgchem
0
answers
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