When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is (1) Hydrogen (2) Oxygen (3) Carbon dioxide (4) All of them

When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is (1) Hydrogen (2) Oxygen (3) Carbon dioxide (4) All of them 
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Carbon dioxide
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When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is - (1) Hydrogen (2) Oxygen (3) Carbon dioxide (4) All of them

Description : When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is - (1) Hydrogen (2) Oxygen (3) Carbon dioxide (4) All of them

Last Answer : (3) Carbon dioxide Explanation: When baking soda and lemon juice are added together, the reaction of the two is an acid-based reaction because it involves an acid (citric acid in the lemon juice) ... , more commonly known as baking soda). Carbon dioxide, a gas, is produced by the reaction.

Salt A commonly used in bakery products on heating gets converted into another salt B which itself is used for removal the hardness of water and a gas C is evolved. The gas C when passed through lime water ,turns it milky. Identify A,B and C. (a) A is sodium hydrogen carbonate ,B is hydrous sodium carbonate and c is carbon dioxide (b)A is sodium carbonate ,B is sodium hydrogen carbonate and c is Carbon monoxide © A is baking soda ,B is washing soda and C is carbon dioxide (d) both a and c

Description : Salt A commonly used in bakery products on heating gets converted into another salt B which itself is used for removal the hardness of water and a gas C is evolved. The gas C when passed through lime water ,turns it ... © A is baking soda ,B is washing soda and C is carbon dioxide (d) both a and c

Last Answer : (d) both a and c

When vinegar and baking soda are mixed together, w gas is formed? w) oxygen x) nitrogen y) carbon dioxide z) hydrogen

Description : When vinegar and baking soda are mixed together, w gas is formed? w) oxygen x) nitrogen y) carbon dioxide z) hydrogen

Last Answer : ANSWER: Y -- CARBON DIOXIDE

During photosynthesis in plants, the gas evolved is - (1) Carbon dioxide (2) Nitrogen (3) Oxygen (4) Hydrogen

Description : During photosynthesis in plants, the gas evolved is - (1) Carbon dioxide (2) Nitrogen (3) Oxygen (4) Hydrogen

Last Answer : (3) Oxygen Explanation: Photosynthesis is a process used by plants and other organisms to convert the light energy captured from the sun into chemical energy that can be used to fuel the organism ... , through primary production, or indirectly, as the ultimate source of the energy in their food.

During photosynthesis in plants, the gas evolved is (1) Carbon dioxide (2) Nitrogen (3) Oxygen (4) Hydrogen

Description : During photosynthesis in plants, the gas evolved is (1) Carbon dioxide (2) Nitrogen (3) Oxygen (4) Hydrogen

Last Answer : Oxygen

A student dropped few pieces of marble in dilute hydrochloric acid contained in a test tube. The evolved gas was then passed through lime water. What change would be observed in lime water? Write balanced chemical equation for both the change observed?

Description : A student dropped few pieces of marble in dilute hydrochloric acid contained in a test tube. The evolved gas was then passed through lime water. What change would be observed in lime water? Write balanced chemical equation for both the change observed?

Last Answer : Answer. When dilute HCl is added to marble which is calcium carbonate, it forms calcium chloride, water and carbon dioxide. The chemical equation for the reaction is as follows: CaCO3 + 2HCl → CaCl2 + H2O ... reaction between lime water and carbon dioxide is as follows: Ca(OH)2 + CO2 → CaCO3 + H2O

The bubbles in Chanmpagne and Soda are - (1) Nitrogen (2) Oxygen (3) Carbon dioxide (4) Hydrogen

Description : The bubbles in Chanmpagne and Soda are - (1) Nitrogen (2) Oxygen (3) Carbon dioxide (4) Hydrogen

Last Answer : (4) Hydrogen

The bubbling off of carbon dioxide when a bottle of carbonated beverage is opened is a good example of: w) deliquescence x) effervescence y) condensation z) sublimation

Description : The bubbling off of carbon dioxide when a bottle of carbonated beverage is opened is a good example of: w) deliquescence x) effervescence y) condensation z) sublimation

Last Answer : ANSWER: EFFERVESCENCE

What is the purpose of adding baking soda to dough? (1) To generate moisture (2) To give a good flavour (3) To give good colour (4) To generate carbon dioxide

Description : What is the purpose of adding baking soda to dough? (1) To generate moisture (2) To give a good flavour (3) To give good colour (4) To generate carbon dioxide

Last Answer : (4) To generate carbon dioxide

Carbon dioxide has each of the following uses except: w) refrigerant x) manufacture of baking soda y) fire extinguisher z) valuable reducing agent

Description : Carbon dioxide has each of the following uses except: w) refrigerant x) manufacture of baking soda y) fire extinguisher z) valuable reducing agent

Last Answer : ANSWER: Z -- VALUABLE REDUCING AGENT

When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain. -Science-7

Description : When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain. -Science-7

Last Answer : The reaction between baking soda and lemon juice can be given as below: Lemon juice + Baking soda ----- C02 (bubbles) + Other substances (Citric acid) (Sodium hydrogen carbonate) (Carbon dioxide) It is a chemical change, because in this change new substances are formed.

The common name of sodium bicarbonate is - (1) Soda ash (2) Baking soda (3) Soda lime (4) Baking powder

Description : The common name of sodium bicarbonate is - (1) Soda ash (2) Baking soda (3) Soda lime (4) Baking powder

Last Answer : (2) Baking soda Explanation: Sodium bicarbonate (NaHCO3) is also known as baking soda, bread soda, cooking soda, and bicarbonate of soda. It is primarily used in cooking (baking), as a leavening ... of the batter and forms the characteristic texture and grain in pancakes, cakes, quick breads, etc.

Sodium bicarbonate is commercially known as – (1) Washing soda (2) Baking soda (3) Caustic soda (4) Soda lime

Description : Sodium bicarbonate is commercially known as – (1) Washing soda (2) Baking soda (3) Caustic soda (4) Soda lime

Last Answer : (2) Baking soda Explanation: Baking Soda is Sodium bicarbonate or sodium hydrogen carbonate. It is primarily used in cooking (baking), as a leavening agent. It reacts with acidic components in batters, ... and grain in pancakes, cakes, quick breads, soda bread, and other baked and fried foods.

The common name of sodium bicarbonate is (1) Soda ash (2) Baking soda (3) Soda lime (4) Baking powder

Description : The common name of sodium bicarbonate is (1) Soda ash (2) Baking soda (3) Soda lime (4) Baking powder

Last Answer : Baking soda

Sodium bicarbonate is commercially known as (1) Washing soda (2) Baking soda (3) Caustic soda (4) Soda lime

Description : Sodium bicarbonate is commercially known as (1) Washing soda (2) Baking soda (3) Caustic soda (4) Soda lime

Last Answer : Baking soda

Lime water turns milky when carbon dioxide is passed through it. It is due to the for mation of: (1) Calcium Carbonate (2) Barium Carbonate (3) Calcium Hydrogen Carbonate (4) Calcium Oxide

Description : Lime water turns milky when carbon dioxide is passed through it. It is due to the for mation of: (1) Calcium Carbonate (2) Barium Carbonate (3) Calcium Hydrogen Carbonate (4) Calcium Oxide

Last Answer : (1) Calcium Carbonate Explanation: When carbon dioxide is passed through lime water for a short time, it turns lime water milky due to formation of a white precipitate of calcium carbonate.

Lime water reacts with chlorine to give a) bleaching powder b) baking powder c) baking soda d) washing soda

Description : Lime water reacts with chlorine to give a) bleaching powder b) baking powder c) baking soda d) washing soda

Last Answer : a) bleaching powder

Bleaching powder is prepared by passing – (1) Chlorine over slaked lime (2) Oxygen over slaked lime (3) Carbon dioxide over slaked lime (4) Chlorine over quick lirne

Description : Bleaching powder is prepared by passing – (1) Chlorine over slaked lime (2) Oxygen over slaked lime (3) Carbon dioxide over slaked lime (4) Chlorine over quick lirne

Last Answer : (1) Chlorine over slaked lime Explanation: Calcium hypochlorite (bleaching powder) is manufactured by the calcium process: 2Cl2 + 2Ca(OH)2 (slaked lime) Ca(OCl)2 + CaCl2 + 2H2O. Bleaching powder is actually a mixture of calcium hypochlorite and the basic chloride with some slaked lime.

Bleaching powder is prepared by passing : (1) Chlorine over slaked lime (2) Oxygen over slaked lime (3) Carbon dioxide over slaked lime (4) Chlorine over quick lirne

Description : Bleaching powder is prepared by passing : (1) Chlorine over slaked lime (2) Oxygen over slaked lime (3) Carbon dioxide over slaked lime (4) Chlorine over quick lirne

Last Answer : Chlorine over slaked lime

In an acid base reaction which product is produced along with a salt? (1) Hydrogen gas (2) Oxygen gas (3) Carbon dioxide (4) Water

Description : In an acid base reaction which product is produced along with a salt? (1) Hydrogen gas (2) Oxygen gas (3) Carbon dioxide (4) Water

Last Answer : (4) Water Explanation: When an acid and a base are placed together, they read to neutralize the acid and base properties, producing a salt. The H(+) cation of the acid combines with the OH(-) anion of the base to form water.

The name of unreactive gas is – (1) Carbon dioxide (2) Hydrogen (3) Nitrogen (4) Oxygen

Description : The name of unreactive gas is – (1) Carbon dioxide (2) Hydrogen (3) Nitrogen (4) Oxygen

Last Answer : (3) Nitrogen Explanation: Nitrogen is chemically unreactive because it has a strong triple bond which binds the two nitrogen atoms together making it harder for it to be broken. It does not burn, and at ordinary temperatures it does not react with other elements.

The gas that is used in the manufacture of vanaspati ghee is - (1) Oxygen (2) Carbon dioxide (3) Hydrogen (4) Nitrogen

Description : The gas that is used in the manufacture of vanaspati ghee is - (1) Oxygen (2) Carbon dioxide (3) Hydrogen (4) Nitrogen

Last Answer : (3) Hydrogen Explanation: Hydrogenation - to treat with hydrogen - is a chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst. ... is for the processing of vegetableoils (fats to give margarine and related spreads and shortenings).

Which is abundant in Gobar gas? (1) Carbon dioxide (2) Methane (3) Oxygen (4) Hydrogen

Description : Which is abundant in Gobar gas? (1) Carbon dioxide (2) Methane (3) Oxygen (4) Hydrogen

Last Answer : (2) Methane Explanation: Bio gas is a clean unpolluted and cheap source of energy in rural areas. It consists of 55-70% methane which is inflammable. Bio gas is produced from cattle dung in ... called digestion. It helps in reducing the deforestation as it arrests for cutting of trees for firewood.

Which gas is used to manufacture vanaspati from vegetable oil is - (1) carbon dioxide (2) nitrogen (3) oxygen (4) hydrogen

Description : Which gas is used to manufacture vanaspati from vegetable oil is - (1) carbon dioxide (2) nitrogen (3) oxygen (4) hydrogen

Last Answer : (4) hydrogen Explanation: Hydrogen is used to manufacture vanaspati from vegetable oil.

The name of unreactive gas is (1) Carbon dioxide (2) Hydrogen (3) Nitrogen (4) Oxygen

Description : The name of unreactive gas is (1) Carbon dioxide (2) Hydrogen (3) Nitrogen (4) Oxygen

Last Answer : Nitrogen

The gas that is used in the manufacture of vanaspati ghee is : (1) Oxygen (2) Carbon dioxide (3) Hydrogen (4) Nitrogen

Description : The gas that is used in the manufacture of vanaspati ghee is : (1) Oxygen (2) Carbon dioxide (3) Hydrogen (4) Nitrogen

Last Answer : Hydrogen

Which is abundant in Gobar gas? (1) Carbon dioxide (2) Methane (3) Oxygen (4) Hydrogen

Description : Which is abundant in Gobar gas? (1) Carbon dioxide (2) Methane (3) Oxygen (4) Hydrogen

Last Answer : Methane

Bleaching powder is made from - (1) Sulphur dioxide and gypsum (2) Chlorine and Charcoal (3) Soda ash and lime (4) Lime and Chlorine

Description : Bleaching powder is made from - (1) Sulphur dioxide and gypsum (2) Chlorine and Charcoal (3) Soda ash and lime (4) Lime and Chlorine

Last Answer : (4) Lime and Chlorine Explanation: The gas which is used in the preparation of bleaching powder is chlorine. It is a mixture of lime and calcium chloride.

When zinc reacts with hydrochloric acid, the gas evolved is (a) Oxygen (b) Hydrogen (c) Chlorine (d) None of these

Description : When zinc reacts with hydrochloric acid, the gas evolved is (a) Oxygen (b) Hydrogen (c) Chlorine (d) None of these

Last Answer : Ans:(b)

Zinc granules on treating with an acid X, form the zinc sulphate (ZnSO4) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle. Identify the acid X and gas evolved Y (a). X- Sulphuric acid and Y- Oxygen gas (b). X- Hydrochloric acid and Y- Oxygen gas (c). X- Sulphuric acid and Y- Hydrogen gas (d). X- Hydrochloric acid and Y- Hydrogen gas

Description : Zinc granules on treating with an acid X, form the zinc sulphate (ZnSO4) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle. Identify the acid X and ... (c). X- Sulphuric acid and Y- Hydrogen gas (d). X- Hydrochloric acid and Y- Hydrogen gas

Last Answer : (c). X- Sulphuric acid and Y- Hydrogen gas

During photosynthesis the liberated gas is (1) Carbon dioxide (2) oxygen (3) Nitrogen (4) Hydrogen

Description : During photosynthesis the liberated gas is (1) Carbon dioxide (2) oxygen (3) Nitrogen (4) Hydrogen

Last Answer : (2) oxygen Explanation: Photosynthesis is a process used by plants and other organisms to convert the light energy captured from the sun into chemical energy that can be used to fuel the organism ... water, releasing oxygen as a waste product.' Photosynthesis is vital for all aerobic life on Earth.

In a sludge tank, the gas mainly produced, is A. Oxygen B. Nitrogen C. Hydrogen D. Carbon dioxide

Description : In a sludge tank, the gas mainly produced, is A. Oxygen B. Nitrogen C. Hydrogen D. Carbon dioxide

Last Answer : ANS: D

Which Gas is included in Fry Chips Packets for safety? A. Nitrogen gas (Answer) B. Carbon dioxide C. Oxygen D. Hydrogen

Description : Which Gas is included in Fry Chips Packets for safety? A. Nitrogen gas (Answer) B. Carbon dioxide C. Oxygen D. Hydrogen

Last Answer : A. Nitrogen gas (Answer)

Facultative anaerobes can live with or without _____ gas. a. carbon dioxide b. hydrogen c. nitrogen d. oxygen

Description : Facultative anaerobes can live with or without _____ gas. a. carbon dioxide b. hydrogen c. nitrogen d. oxygen

Last Answer : d. oxygen

Baker’s yeast produce gas which helps in rising of dough is ____________. a) oxygen b)hydrogen c)carbon dioxide d)nitrogen

Description : Baker’s yeast produce gas which helps in rising of dough is ____________. a) oxygen b)hydrogen c)carbon dioxide d)nitrogen

Last Answer : c)carbon dioxide

During photosynthesis the liberated gas is : (1) Carbon dioxide (2) Oxygen (3) Nitrogen (4) Hydrogen

Description : During photosynthesis the liberated gas is : (1) Carbon dioxide (2) Oxygen (3) Nitrogen (4) Hydrogen

Last Answer : Oxygen

What is baking powder? (a) mixture of baking soda with tartaric acid (b) mixture of washing soda with citric acid (c) mixture of sodium hydrogen carbonate with edible acid (d) option a and c both

Description : What is baking powder? (a) mixture of baking soda with tartaric acid (b) mixture of washing soda with citric acid (c) mixture of sodium hydrogen carbonate with edible acid (d) option a and c both

Last Answer : (d) option a and c both

The highest volume of gases in lower atmosphere is comprised of - (1) Hydrogen (2) Carbon dioxide (3) Oxygen (4) Nitrogen

Description : The highest volume of gases in lower atmosphere is comprised of - (1) Hydrogen (2) Carbon dioxide (3) Oxygen (4) Nitrogen

Last Answer : (4) Nitrogen Explanation: There are a number of atmospheric gases which make up air. In the lower atmosphere or troposphere, the main gases are nitrogen and oxygen, which make up 78% and 21% of the volume of air respectively. The remaining 1% of the atmospheric gases is made up of trace gases.

Silver gets corroded due to ______ in air. (1) Oxygen (2) Hydrogen Sulphide (3) Carbon dioxide (4) Nitrogen

Description : Silver gets corroded due to ______ in air. (1) Oxygen (2) Hydrogen Sulphide (3) Carbon dioxide (4) Nitrogen

Last Answer : (2) Hydrogen Sulphide Explanation: Silver is a fairly stable metal and under normal circumstances does not corrode quickly. However, it is particularly susceptible to the effects of the sulfide ... atmosphere, especially in marine environment, and readily forms a surface tarnish of silver sulphide.

The major constituent of air is – (1) nitrogen (2) carbon dioxide (3) oxygen (4) hydrogen

Description : The major constituent of air is – (1) nitrogen (2) carbon dioxide (3) oxygen (4) hydrogen

Last Answer : (1) nitrogen Explanation: Depending on various geographical locationsthese may change, but for the most part air is made up of 78% nitrogen (N2), 21% oxygen (O2), and trace amounts of ... and mostly inert diatomic gas at standard conditions, constituting 78.09% by volume of Earth's atmosphere.

An organic compound contain 69% carbon and 4.8% hydrogen, the remaining being oxygen. Calculate the masses of carbon dioxide and water produced when 0.20g of this substance is subjected to complete combustion.

Description : An organic compound contain 69% carbon and 4.8% hydrogen, the remaining being oxygen. Calculate the masses of carbon dioxide and water produced when 0.20g of this substance is subjected to complete combustion.

Last Answer : Calculation of mass of CO2 produced: Mass of compound =0.20g %C =12 x C 69=12*mass of CO2 formed*100/44*0.2 Mass of CO2 formed =69*44*.2/12*100 = 0.506g Similarly, % H =2* mass of H2Oformed*100/18* ... compound 4.8=2* mass of H2Oformed*100/18* 0.2 Mass of H2Oformed =4.8*18*0.2/2*100 =0.0864g

Silver gets corroded due to ___ in air. (1) Oxygen (2) Hydrogen Sulphide (3) Carbon dioxide (4) Nitrogen

Description : Silver gets corroded due to ___ in air. (1) Oxygen (2) Hydrogen Sulphide (3) Carbon dioxide (4) Nitrogen

Last Answer : Hydrogen Sulphide

The highest volume of gases in lower atmosphere is comprised of (1) Hydrogen (2) Carbon dioxide (3) Oxygen (4) Nitrogen

Description : The highest volume of gases in lower atmosphere is comprised of (1) Hydrogen (2) Carbon dioxide (3) Oxygen (4) Nitrogen

Last Answer : Nitrogen

The major constituent of air is (1) nitrogen (2) carbon dioxide (3) oxygen (4) hydrogen

Description : The major constituent of air is (1) nitrogen (2) carbon dioxide (3) oxygen (4) hydrogen

Last Answer : nitrogen

10.(a) An ore on treatment with dilute hydrochloric acid produces brisk effervesces. What type of ore is this? What steps will be required to obtain metal from the enriched ore. , (b) Copper coin is kept immersed in silver nitrate solution for some time. What change will take place in coin and colour of the solution ? Write balanced chemical equation of the reaction involved. -Chemistry

Description : 10.(a) An ore on treatment with dilute hydrochloric acid produces brisk effervesces. What type of ore is this? What steps will be required to obtain metal from the enriched ore. , (b) ... in coin and colour of the solution ? Write balanced chemical equation of the reaction involved. -Chemistry

Last Answer : (a) Carbonate ore: (i) Calcination: Carbonate ore is heated in limited supply of air and oxide is obtained, e.g. (b) Copper, being more reactive than silver will displace silver from silver nitrate ... and there will be deposition of silver on copper coin. The colour of solution will turn to blue.

__________ gas is normally not used as a coolant in a nuclear reactor, because of its high neutron capture cross-section. (A) Nitrogen (B) Hydrogen (C) Helium (D) Carbon dioxide

Description : __________ gas is normally not used as a coolant in a nuclear reactor, because of its high neutron capture cross-section. (A) Nitrogen (B) Hydrogen (C) Helium (D) Carbon dioxide

Last Answer : (A) Nitrogen

What happens when excess of carbon dioxide gas is passed through lime water? (a) Lime water first turns milky and then colorless (b) Lime water turns bluish me water turns milky (d) Lime water turns blackish

Description : What happens when excess of carbon dioxide gas is passed through lime water? (a) Lime water first turns milky and then colorless (b) Lime water turns bluish me water turns milky (d) Lime water turns blackish

Last Answer : (a) Lime water first turns milky and then colorless

Write balanced chemical equations for the following reactions: (a) Dilute sulphuric acid reacts with aluminium powder. (b) Dilute hydrochloric acid reacts with sodium carbonate. (c) Carbon dioxide is passed through lime water. -Chemistry

Description : Write balanced chemical equations for the following reactions: (a) Dilute sulphuric acid reacts with aluminium powder. (b) Dilute hydrochloric acid reacts with sodium carbonate. (c) Carbon dioxide is passed through lime water. -Chemistry

Last Answer : i hope it helped you

Water gas is the mixture of – (1) carbon dioxide and hydrogen (2) carbon monoxide and nitrogen (3) carbon monoxide and hydrogen (4) carbon dioxide and nitrogen

Description : Water gas is the mixture of – (1) carbon dioxide and hydrogen (2) carbon monoxide and nitrogen (3) carbon monoxide and hydrogen (4) carbon dioxide and nitrogen

Last Answer : (3) carbon monoxide and hydrogen Explanation: Water gas, a mixture of carbon monoxide and hydrogen, is produced by treating carbon (in the form of coke or coal) with steam at high temperatures.

The gas dissolved in water that makes it basic is – (1) ammo (2) sulphur dioxide (3) hydrogen (4) carbon dioxide

Description : The gas dissolved in water that makes it basic is – (1) ammo (2) sulphur dioxide (3) hydrogen (4) carbon dioxide

Last Answer : (2) sulphur dioxide Explanation: Ammonia has that dissolves in water forms a solution of ammonium hydroxide (NH4OH). This solution (including the gas) is a strong base and will make the solution alkaline.