Why is burning of a candle involves both physical and chemical change?

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Aayush Asked Apr 7

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ALOK_RAJ Asked Aug 4, 2023

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In a reversible chemical reaction having two reactants in equilibrium with one product, if the initial concentration of both the reactants is doubled, then the equilibrium constant will :

ALOK_RAJ Asked Aug 4, 2023

by ALOK_RAJ

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Aayush Asked Mar 1

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Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for one-half of the hydrogen to escape?

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In response to the speaker's question." What singed thy wings?" The Koel replies, "The fire of love has charred my wings." What does the Koel's answer suggest? Can love burn like fire? Is this burning a positive thing on a negative one. Explain.

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Chandan Asked Oct 6, 2023

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Ammonia contains 82.35% of nitrogen and 17.65% hydrogen. Water contains 88.9% of oxygen and 11.1% of hydrogen. Nitrogen dioxide contains 63.15% of oxygen and 36.85% of nitrogen. Show by calculations from these data which law of chemical combination is verified.

Chandan Asked Oct 6, 2023

by Chandan

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ALOK_RAJ Asked Nov 17, 2023

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100 mL of PH3 when decomposed produced solid phosphorus and hydrogen. The change in volume is :

ALOK_RAJ Asked Nov 17, 2023

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Aayush Asked Feb 2

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A Chemical equation is balanced according to the law of —

Aayush Asked Feb 2

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The second stanza depicts great mental suffering and physical pain of a woman. Elaborate.

Sanjeev Yadav ji Asked Aug 3, 2023

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Shiv roshan kushwaha Asked Apr 22, 2022

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In a second order reaction, when the concentration of both the reactants are equal, the reaction is completed 20% in 500s. How long would it take for the reaction to go to 60% completion?

Shiv roshan kushwaha Asked Apr 22, 2022

by Shiv roshan kushwaha

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LEELADHAR YADAV Asked Aug 28, 2023

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Let $f:(-1,1) \rightarrow B$, be a function defined by $f(x)=\tan ^{-1} \frac{2 x}{1-x^2}$, then $f$ is both one-one and onto when $B$ is the interval :

LEELADHAR YADAV Asked Aug 28, 2023

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Barjes Yadav Asked Feb 22

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A large truck and a car, both moving with a velocity of magnitude v, have a head-on collision and both of them come to a halt after that. If the collision lasts for 1 s:

Barjes Yadav Asked Feb 22

by Barjes Yadav

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ALOK_RAJ Asked Nov 16, 2023

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A solid element M burns in oxygen and produces only the gaseous oxide of M without any change in volume.

ALOK_RAJ Asked Nov 16, 2023

by ALOK_RAJ

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ALOK_RAJ Asked Feb 23

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Which out of the two molecules OCS and CS2 has a higher dipole moment and why?

ALOK_RAJ Asked Feb 23

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Chandan Asked Aug 26, 2023

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The values of $P_{C}$ and $T_{C}$ for two real gases X and Y (both gases have same molar mass) are given below.

Chandan Asked Aug 26, 2023

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Dev Yaduvanshi Asked Dec 9, 2023

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Why is the Global Trade Research Initiative (GTRI) suggesting a reevaluation of India's bilateral FTAs with Singapore and Thailand?

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by Dev Yaduvanshi

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John Michael Asked Aug 16, 2023

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Why a political party is called the life of democracy? And, Why is a political party necessary for a democracy?

John Michael Asked Aug 16, 2023

by John Michael

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Sanjeev Yadav ji Asked Aug 12, 2023

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Why is the daughter filled with a sense of weariness and emptiness ? Have you ever experienced like her?

Sanjeev Yadav ji Asked Aug 12, 2023

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ALOK_RAJ Asked Jul 25, 2023

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Curvature is observed both in the body of ovule and embryo sac in case of ______ ovule

ALOK_RAJ Asked Jul 25, 2023

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Aayush Asked Feb 1

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Chemical (A) is used for water softening to remove temporary hardness. (A) reacts with Na2CO3 to generate caustic soda. When CO2 is bubbled through (A), it turns cloudy.

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Aayush Asked Jan 30

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What is a balanced chemical equation?

Aayush Asked Jan 30

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Who is Jithesh John, and what recent announcement involves him?

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ALOK_RAJ Asked May 7, 2022

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The addition of a catalyst during a chemical reaction alters which of the following quantities?

ALOK_RAJ Asked May 7, 2022

by ALOK_RAJ

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Barjes Yadav Asked Feb 22

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A hockey ball of mass 200 g travelling at 10 m s-¹ is struck by a hockey stick so as to return it along its original path with a velocity at 5 m s-¹. Calculate the change of momentum occurred in the motion of the hockey ball by the force applied by the hockey stick.

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by Barjes Yadav

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Saurabh Kumar Verma Asked Jun 2, 2022

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20 teachers of a school either teach Mathematics or Physics. 12 of them teach Mathematics while 4 teach both the subjects. Then, the number of teachers teaching Physics only is

Saurabh Kumar Verma Asked Jun 2, 2022

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ALOK_RAJ Asked Nov 28, 2023

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The chemical name of aspirin is

ALOK_RAJ Asked Nov 28, 2023

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ALOK_RAJ Asked Nov 27, 2023

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What is the chemical composition of cationic detergents?

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ALOK_RAJ Asked Aug 6, 2023

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Why is the concept of resonance needed? What is a resonance hybrid? How does it differ from the resonance structures drawn for a molecule?

ALOK_RAJ Asked Aug 6, 2023

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Chandan Asked Oct 15, 2023

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If L, C and R represents physical quantities inductance, capacitance and resistance respectively, then what will be dimension of $\sqrt{1 / LC }$.

Chandan Asked Oct 15, 2023

by Chandan

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Chandan Asked Sep 22, 2023

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The binding energy of an electron in the ground state of He is equal to 24.6 eV. Calculate the energy required to remove both the electrons

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What is Change of State?

John Michael Asked Aug 10, 2023

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ANAND_YADAV Asked Jul 27, 2023

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Which transition involves maximum amount of energy?

ANAND_YADAV Asked Jul 27, 2023

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ANAND_YADAV Asked Jul 28, 2023

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The elements which exhibit both vertical and horizontal similarities are —

ANAND_YADAV Asked Jul 28, 2023

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A mother is searching for nettles and vines who is she? Why is she searching such things?

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Dev Yaduvanshi Asked Dec 5, 2023

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By 2030, how much annual funding is projected to be required by emerging markets and developing economies to address climate change?

Dev Yaduvanshi Asked Dec 5, 2023

by Dev Yaduvanshi

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Aayush Asked Feb 7

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If the unit of length, mass and time be each doubled, then how the unit of work will change.

Aayush Asked Feb 7

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Aayush Asked Feb 7

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If the unit of mass, length and time be each doubled, then how the unit of power will change.

Aayush Asked Feb 7

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