Sodium and potassium react with water much more vigorously than lithium because :

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ANAND_YADAV Asked Jul 25, 2023

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Lithium only forms monoxide when heated in oxygen. Sodium forms monoxide and peroxide in excess of oxygen. Other alkali metals form superoxide with oxygen i.e. MO2.

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A substance absorbs CO2 and violently reacts with water. The substances is —

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In the synthesis of sodium carbonate by Solvay (or ammonia soda) process the recovery of ammonia is done by treating NH4Cl with Ca(OH)2. The by-product obtained in the process is —

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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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What weight of barium chloride will react with 2.36 g of sodium sulphate in solution so as to produce 3.88 g of barium sulphate and 1.94 g of sodium chloride in solution?

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ANAND_YADAV Asked Jul 25, 2023

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Which of the following statements about the highly pure dilute solution of sodium in liquid ammonia at -33ºC is incorrect?

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If 30 ml of H2 and 20 mL of O2 react to form water, what will be left at the end of the reaction?

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ANAND_YADAV Asked Jul 25, 2023

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Bubbling CO2 through which of the following will produce a white precipitate —

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ANAND_YADAV Asked Jul 25, 2023

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Which of the following compounds on thermal decomposition yields a basic as well as an acidic oxide?

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ANAND_YADAV Asked Jul 25, 2023

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Calcium is obtained by :

ANAND_YADAV Asked Jul 25, 2023

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AnjaliYadav Asked Oct 21, 2022

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सोडियम, पोटैशियम और लीथियम को तेल के अंदर संगृहित क्यों किया जाता है? Sodium, Potassium Aur Lithium Ko Tel Ke Andar Sangrahit Kyon Kiya Jaata Hain?

AnjaliYadav Asked Oct 21, 2022

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ALOK_RAJ Asked Nov 28, 2023

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When chlorine water is added to an aqueous solution of potassium halide in presence of chloroform, a violet colour is obtained.

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ALOK_RAJ Asked Oct 5, 2023

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What weight of carbon disulphide, CS2 can be completely oxidised to sulphur dioxide and carbon dioxide by the oxygen liberated when 325g of Na2O2 react with water?

ALOK_RAJ Asked Oct 5, 2023

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Aayush Asked Feb 2

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Hydrogen combines with chlorine to form HCl. It also combines with sodium to form NaH. If sodium and chlorine also combine with each other, they will do so in the ratio of their masses as —

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25.4g of iodine and 14.2g of chlorine are made to react completely to yield a mixture of ICl and ICl3.

Chandan Asked Sep 22, 2023

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Haemophilia is more commonly seen in human males than in human females because

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A person looking at another person wearing a shirt with a pattern comprising vertical and horizontal lines is able to see the vertical lines more distinctly than the horizontal ones.

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ALOK_RAJ Asked Nov 28, 2023

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The pH of pure water at $25^{\circ} {C}$ and $35^{\circ} {C}$ are 7 and 6 respectively. The heat of formation of water from H+ and OH- is

ALOK_RAJ Asked Nov 28, 2023

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Chandan Asked Oct 7, 2023

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Hydrogen peroxide and water contain 5.93% and 11.2% of hydrogen respectively. How this data illustrates the law of multiple proportions?

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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.

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Chandan Asked Sep 22, 2023

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0.218 g of magnesium when dissolved in dilute HCl evolved 218.2 mL of hydrogen at $17^{\circ} C$ and 754.5 mm collected over water.

Chandan Asked Sep 22, 2023

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Chandan Asked Oct 15, 2023

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A gas bubble from an explosion under water oscillates with a time period T which is proportional to $P ^{a} \rho^{b} E ^{c}$ where $P$ is the pressure

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Chandan Asked Sep 12, 2023

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100 mL of air containing only oxygen and nitrogen is taken in a jar over water. NO is slowly passed till more brown fumes appear in the gas jar. It is found that 42 mL of NO is required. The percentage nitrogen in the air would be:

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Bleeding is stopped by the application of ferric chloride. This is because —

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ALOK_RAJ Asked Jul 25, 2023

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Which of the following statements are true about the alkali metals?

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ALOK_RAJ Asked Jan 23, 2022

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कार्बनिक रसायन किसे कहते हैं? Carbonic Rasayan Kise Kahate Hain?

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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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Weight of copper oxide obtained by treating 2.16 g of metallic copper with nitric acid and subsequent ignition was 2.7 g.

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The solubility of $\left[ Co \left( NH _{3}\right)_{4} Cl _{2}\right] ClO _{4}$ ____________, if the $\lambda_{ Co \left( NH _{3}\right)_{4} Cl _{2}^{+}}=50, \lambda_{ ClO _{4}{ }^{-}}=70$ and the measured resistance was $33.5 \Omega$ in a cell with cell constant of $0.20$ is ____________

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Amongst H2O, H2S, H2Se and H2Te, the one with the highest boiling point is

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ALOK_RAJ Asked Oct 18, 2023

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You are given the following cell at 298K, $Zn \left| Zn^{++} _{( aq .)}\right|| HCl ( aq .)|\left| H _{2}( g )\right| Pt$ with $E _{\text {cell }}=0.701 V$ and $E _{ Zn ^{2+} / Zn }^{0}=-0.76 V$.

ALOK_RAJ Asked Oct 18, 2023

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A mixture of 0.535g of ethanol and acetaldehyde when treated with a Fehling solution gave 1.2g of a red precipitate.

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ANAND_YADAV Asked Jul 30, 2023

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When white phosphorus reacts with caustic soda, the products are PH3 and NaH2PO2. This reaction is an example of :

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Aayush Asked Jan 30

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For the reaction 2P + Q →3R, 12 mole of P and 5 mole of Q will produce —

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Sodium and potassium react with water much more vigorously than lithium because :

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