What is Radioactivity?

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ANAND_YADAV Asked Aug 2, 2023

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रेडियो ऐक्टिवता खोज किसने और कब की थी? Radio Activeta Ki Khoj Kisne Aur Kab Ki Thi?

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What is a Neutralisation Reaction? Give two examples.

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What happens when dilute hydrochloric acid is added to iron fillings?

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What is the number of molecules in 0.25 moles of oxygen?

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Calculate the atomic number of an element whose atomic nucleus has 23 and neutron number 12. What is the symbol of the element?

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What is the mass of 4 moles of aluminum atoms?

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What is the mass of 5 mole of ammonia?

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If 6.3 g of NaHCO3 are added to 15.0 g of CH3COOH solution, the residue is found to weight 18.0 g. What is the mass of CO2 released in this reaction?

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Aayush Asked Feb 1

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A 10% w/w solution of cane sugar has undergone partial inversion according to the reaction : Sucrose + water →glucose + fructose . The boiling point of the solution is 100.7°C. What fraction of sugar has inverted?

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Aayush Asked Jan 30

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What is a balanced chemical equation?

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What volume of CO2 at $27^{\circ} C$ and 700 mm pressure will be formed when 100mL of carbon monoxide at $127^{\circ} C$ and 725 mm is completely oxidized with oxygen gas?

Aayush Asked Jan 5

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A mixture of 20mL of methane and 30mL of oxygen is exploded. What is the volume after reaction and the composition of the resulting product? All the measurements are made under identical conditions.

Aayush Asked Jan 5

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Aayush Asked Jan 4

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100 mL of carbon monoxide are mixed with 40 mL of oxygen and exploded. If the resulting mixture is shaken with caustic potash, what volume of the gas will remain and what gas will it be?

Aayush Asked Jan 4

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ALOK_RAJ Asked Dec 1, 2023

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Lemon juice normally has a pH of 2 . If all the acid in the lemon juice is citric acid and there are no citrate salts present, then what will be the citric acid concentration (H.Cit) in the lemon juice?

ALOK_RAJ Asked Dec 1, 2023

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ALOK_RAJ Asked Nov 27, 2023

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What happens when D-glucose is treated with the following reagents? (A) Bromine water (B) HNO3

ALOK_RAJ Asked Nov 27, 2023

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ALOK_RAJ Asked Nov 27, 2023

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When RNA is hydrolysed, there is no relationship among the quantities of different bases formed. What does this fact suggest about the structure of RNA?

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What is vulcanisation of rubber?

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Explain what is meant by glycosidic linkage?

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What is the role of benzoyl peroxide in the polymerisation of ethene?

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Which type of biomolecules have some structural similarity with synthetic polyamides? What is this similarity?

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How do detergents cause water pollution? What remedy is suggested to prevent this pollution?

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What is the tincture of iodine?

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What is the structural difference between HDP and LDP? How does the structure account for different behaviour, nature and hence the use of the polymer?

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What is the chemical composition of cationic detergents?

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What is a gene?

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Chandan Asked Oct 18, 2023

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What is the difference between Combustion and Oxidation? Give two oxidation reactions of carbon compounds.

Chandan Asked Oct 18, 2023

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When 10 gm of a non-volatile solute is dissolved in 100 gm of benzene its boiling point raised by 1º. What is the molecular mass of solute?

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Cu-63 isotope is 69.09% and Cu-65, 30.91% in a copper atom. If the mass of ${ }^{63} Cu$ isotope is 62.9298 amu, what must be the mass of ${ }^{63} Cu$ isotope given that atomic mass of copper is 63.546 amu?

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1.0g of a metallic carbonate left on ignition 0.56g of its oxide. What is the atomic weight of the metal?

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A cell is containing two H electrodes. The negative electrode is in contact with a solution of 10^{-6} M H+ ions. The emf of the cell is 0.118 V at $25^{\circ} {C}$. What is the $\left[{H}^{+}\right]$at positive electrode?

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Chandan Asked Sep 12, 2023

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What is the frequency of a X-ray photon whose momentum is 1.1 × 10^{-23} kg.m.s^{-2}?

Chandan Asked Sep 12, 2023

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What is Radioactivity?

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