Description : If lime water is kept in the air, it turns milky due to presence of – (1) Carbondioxide (2) Nitrogen (3) Oxygen (4) Sulphurdioxide
Last Answer : (1) Carbondioxide Explanation: Lime water is calcium hydroxide (Ca(OH)2). When carbon dioxide is passed into it, it turns milky because of the formation of calcium carbonate: Ca(OH)2 + CO2 = CaCO3 +H2O
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.
Description : Which of them liberate a gas which turns lime water milky .
Last Answer : Which of them liberate a gas which turns lime water milky . A. B. `{:(CH_(3)-CH-COOH),(" |"),(" "COOH ... ))_(5)-COOH overset(Ca(OH)_(2)//Delta)to` D.
Description : A gas turns lime water milky and acidified `K_(2)Cr_(2)O_(7)` solution green then gas is :
Last Answer : A gas turns lime water milky and acidified `K_(2)Cr_(2)O_(7)` solution green then gas is : A. `HCl` B. `H_(2)S` C. `SO_(2)` D. `CO_(2)`
Description : Why lime water is turns milky when carbon dioxide is passed through it?
Last Answer : A precipitate of calcium carbonate is formed.
Description : What is the name of a colorless gas that turns lime water milky?
Last Answer : This gas is carbon dioxide.
Description : Which gas turns lime water milky?
Last Answer : Carbondioxide
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
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
Description : Which one of the following gases is most significant as air pollutant? A. Carbondioxide B. Oxygen C. Nitrogen D. Sulphur-dioxide
Last Answer : ANS: D
Description : The atmospheric gas that is mainly responsible for Green House effect – (1) Ozone (2) Nitrogen (3) Oxygen (4) Carbondioxide
Last Answer : (4) Carbondioxide Explanation: A greenhouse was (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental ... the Earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone.
Description : The atmospheric gas that is mainly responsible for Green House effect : (1) Ozone (2) Nitrogen (3) Oxygen (4) Carbondioxide
Description : A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of A. Carbondioxide gas B. Hydrogen sulphide gas C. Methane gas D. Petrol vapours
Last Answer : ANS: C
Description : Lead acetate test in sewer manhole is done to test the presence of A. Methane gas B. Hydrogen sulphide C. Carbondioxide gas D. Diesel vapours
Last Answer : ANS: B
Description : Which one of the following contributes nitrogen atoms to both purine and pyrimidine rings? (A) Aspartate (B) Carbanoyl phosphate (C) Carbondioxide (D) Tetrahydrofolate
Last Answer : Answer : A
Description : The gas which turns into liquid at the lowest temperature among the following is – (1) hydrogen (2) oxygen (3) helium (4) nitrogen
Last Answer : (1) hydrogen Explanation: Liquid hydrogen (LH2) is the liquid state, of the element hydrogen. Hydrogen is found naturally in the molecular H2 form. To exist as a liquid, H2 must ... method of obtaining liquid hydrogen involves a compressor resembling a jet engine in both appearance and principle.
Description : The gas which turns into liquid at the lowest temperature among the following is (1) hydrogen (2) oxygen (3) helium (4) nitrogen
Last Answer : hydrogen
Description : Which gase changes lime water in milky colour? -Do You Know?
Last Answer : answer:
Description : Which of the following gases turn lime water milky when passed throught it.
Last Answer : Which of the following gases turn lime water milky when passed throught it. A. `SO_(2)` B. `CO_(2)` C. `HCl` D. `H_(2)S`
Description : Which gase changes lime water in milky colour?
Last Answer : Carbon dioxide
Description : 1. Which describes India as a Secular State? 2. Which gase changes lime water in milky colour? 3. Planning in India derives its objectives from which policy? 4. There is a submarine ridge in the ... is the state that is top in the cultivation of flowers? 20. Why is Mohenjodaro is also known?
Last Answer : Answer : 1. Preamble to the Constitution2. Carbon dioxide 3. Directive Principles of State policy 4. Ninety east ridge 5. Ramchandra Dev 6. Virendra Sehwag 7. Nastic movement 8. Preamble to the Constitution9. ... Bentich 16. Carbon dioxide 17. Once 18. Methane 19. Tamil Nadu 20. Mound of the Dead
Description : The gas which turns limewater milky is?
Description : Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N2 in contaminated air at ... asphyxiate is ≥ __________ percent. (A) 84 (B) 88 (C) 80 (D) 92
Last Answer : (A) 84
Description : Consider the following four statements (A-D) related to the common frog Rana tigrina, and select the correct option stating which ones are true (T) and which ones are false (F). Statements: A. On dry land it would die due to lack of O2 if ... C D (a) T F F T (b) T T F F (c) F F T T (d) F T T F
Last Answer : (a) T F F T
Description : (1) the action of ultraviolet rays on oxygen Explanation: The majority of tropospheric ozone formation occurs when nitrogen oxides (NOx), carbon monoxide (CO ) and volatile organic compounds (VOCs), such as xylene, ... violet rays. NOx, CO, and VOCs are called ozone precursors. CO + 2O2 + CO2 + O3
Last Answer : Water is not effective in extinguishing a fire caused by petrol because - (1) the flame is too hot for water to cool it down (2) water and petrol react chemically (3) water and petrol are ... (4) water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn
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.
Description : Silver gets corroded due to ___ in air. (1) Oxygen (2) Hydrogen Sulphide (3) Carbon dioxide (4) Nitrogen
Last Answer : Hydrogen Sulphide
Description : Use of hydrated lime in water treatment (A) Before filtration, reduces the bacterial load on filters (B) After filtration, combats the corrosiveness of water due to the presence of O2 & CO2 (C) Is to adjust the pH value (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Paper turns yellowish with age due to the presence of the chemical
Last Answer : lignin.
Description : A green coloured solid compound ̳X , gets oxidized to reddish brown solid in presence of air. ̳X on heating gives brown coloured solid ̳Y and two pungent smelling gases ̳A and ̳B . ̳A turns acidified potassium ... , SO 3 , decomposition (d) FeSO 4 , Fe 2 O 3 , SO 3 , SO 2 , decomposition
Last Answer : (c) FeSO 4 , Fe 2 O 3, SO 2 , SO 3 , decomposition
Description : The ‘Green House effect' is produced due to the presence of excess amount of – (1) Sulphur dioxide (2) Nitrogen dioxide (3) Carbon monoxide (4) Methane
Last Answer : (4) Methane Explanation: By their percentage contribution to the greenhouse effect on Earth the four major gases are: Water vapour (36-70%), Carbon dioxide (9-26%), Methane (4-9%) and Ozone (3- 7%).
Description : The ‘Green House effect’ is produced due to the presence of excess amount of (1) Sulphur dioxide (2) Nitrogen dioxide (3) Carbon monoxide (4) Methane
Last Answer : Methane
Description : When quick lime is mixed with Carbon dioxide it turns into?
Last Answer : Milky colour
Description : An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change? (a) Baking powder (b) Lime (c) Ammonium hydroxide solution (d) Hydrochloric acid
Last Answer : (d) Hydrochloric acid
Description : From two amino acids peptide bond formation involves removal of one molecule of (A) Water (B) Ammonia (C) Carbondioxide (D) Carboxylic acid
Description : The natural disaster in which carbondioxide suddenly erupts from a deep lake water is known as _______. (1) Lacaustrine (2) Fluvial (3) Glacial (4) Liminic
Last Answer : (4) Liminic Explanation: A limnic eruption, also referred to as a lake overturn, is a rare type of natural disaster in which dissolved carbon dioxide (CO2) suddenly erupts from deep lake water, ... and humans. Such an eruption may also cause tsunamis in the lake as the rising CO2 displaces water.
Description : Bitumen may be dissolved in (A) Carbondioxide (B) Water (C) Sodium chloride (D) Carbon disulphide
Last Answer : Answer: Option D
Description : 9. Montreal protocol aims at a) biodiversity conservation b) reduction of ozone depleting substances c) control of water pollution d) control of carbondioxide emission
Last Answer : a) biodiversity conservation
Description : Assertion `:-` The blood transports carbondioxide comparatively easily. Reason `:-` During `CO_(2)` transport chloride ions diffuse from plasma into t
Last Answer : Assertion `:-` The blood transports carbondioxide comparatively easily. Reason `:-` During `CO_(2)` ... D. If both Assertion & Reason are false.
Description : The carbondioxide carrying power of the blood residing within the red cells is (A) 50% (B) 60% (C) 85% (D) 100%
Last Answer : Answer : C
Description : From dietary protein as well as from the urea present in fluids secreted into the gastrointestinal tract intestinal bacteria produce (A) Carbondioxide (B) Ammonia (C) Ammonium sulphate (D) Creatine
Last Answer : Answer : B
Description : The gas evolved in sewers is A. Carbondioxide B. Hydrogen sulphide C. Methane D. All of these
Description : In very first stage of decomposition of the organic matter in sewage A. Nitrites are formed B. Nitrates are formed C. Carbondioxide is formed D. Ammonia is formed
Description : The gas which may cause explosion in sewers, is A. Carbondioxide B. Methane C. Ammonia D. Carbon monoxide
Description : Yeast play an important role in the alcohol industry, converting pyruvic acid into carbondioxide and ethyl alcohol by the process of A- glycolysis B- respiration C- fermentation D- Krebs cycle
Last Answer : fermentation
Description : A square coil of edge I having n turns carries a curent i. it is kept on a smooth horizontal plate. A uniform magnetic field B exists in a direction p
Last Answer : A square coil of edge I having n turns carries a curent i. it is kept on a smooth horizontal plate. A uniform ... . `(Mg)/(4niL)` D. `(2Mg)/(niL)`
Description : An aluminium strip is kept immersed in a freshly prepared ferrous sulphate solution taken in a test tube, the change observed is that a) Green solution slowly turns brown b) Lower end of the test ... c)A colourless gas with smell of burning sulphur is evolved c)Light green solution changes to blue
Last Answer : a) Green solution slowly turns brown
Description : (3) checking the penetration of ultra-violet rays to the earth Explanation: Ozone in the ozone layer filters out sunlight wavelengths from about 200 nm UV rays to 315 nm, with ozone peak absorption at about 250 nm. This ... the lower UV-C (200 nm-280 nm) and the entire UV-B band (280 nm-315 nm).
Last Answer : The advantage of detergents over soaps is – (1) Detergents are soluble in water (2) Detergents could not give much lather (3) Detergents give lather even with hard water (4) Soaps give lather with only soft water