Description : The color of Red soil is red due to the presence of the which of the following oxides? a. Ferric b. Aluminium c. Phosphorus d. Calcium
Last Answer : a. Ferric
Description : Soil of Western Rajasthan have a high content or (a) Aluminium (b) Calcium (c) Nitrogen (d) Phosphorus
Last Answer : Ans: (b)
Description : Which of the following statements regarding red soils of India is/are correct? 1. The colour of the soil is-red due to ferric oxide content. 2. Red soils are rich in lime, humous and potash. 3. They are porous and have friable ... OS2011] (a) 1 only (b) 1 and 3 only (c) 2 and 3 only (d) 1, 2 and 3
Description : Red color of onion is caused due to the presence of - a) Zinc b) Sulpher c) Iron d) Anthocynin
Last Answer : d) Anthocynin
Description : Plants grown in acidic soil are deficient in_____ a. Calcium and Manganese b. Magnesium and Calcium c. Iron and Manganese d. Aluminium and Iron
Last Answer : b. Magnesium and Calcium
Description : Phosphorus is generally fixed in acid soils in the form of— (A) Calcium Phosphate (B) Zn Phosphate (C) Aluminium Phosphate (D) None of these
Last Answer : (C) Aluminium Phosphate
Description : Soils of Western Rajasthan have a high content of a) Aluminium b) Calcium c) Nitrogen d) Phosphorus
Last Answer : b) Calcium
Description : Acid rain is caused due to pollution of atmosphere by – (1) oxides of carbon and nitrogen (2) oxides of nitrogen and sulphur (3) oxides of nitrogen and phosphorus (4) None of these
Last Answer : (2) oxides of nitrogen and sulphur Explanation: Acid rain is caused by emissions of Sulpfur Dioxide (SO2) and Nitrogen Oxide (NOx), which react with the water molecules in the atmosphere to produce acids.
Description : Red short iron cracks when bent due to the presence of (A) Sulphur (B) Carbon (C) Phosphorus (D) Silicon
Last Answer : Answer: Option A
Description : Which is the most widely used coagulant for the treatment of turbid water? (A) Alum (aluminium sulphate) (B) Lime (C) Ferric chloride (D) Sodium aluminate
Last Answer : (A) Alum (aluminium sulphate)
Description : Alum is chemically (A) Copper sulphate (B) Aluminium sulphate (C) Ferrous sulphate (D) Ferric sulphate
Last Answer : (B) Aluminium sulphate
Description : If in the rice crop field, the leaves turn narrow, short, erect, and lemon yellowish and the entire field may appear yellowish, then the rice may be deficient of which nutrient? a. Calcium b. Potassium c. Nitrogen d. Phosphorus
Last Answer : c. Nitrogen
Description : Which of the following is used as a coagulant in treating turbid water? (A) Chlorine (B) Ferric sulphate (C) Calcium sulphate (D) Activated carbon
Last Answer : (B) Ferric sulphate
Description : The presence of alkali oxides in alumino silicate ceramics is likely to result in dielectric breakdown due to (A) Polarization (B) Conductivity (C) Structural homogeneties (D) Ionization
Last Answer : The presence of alkali oxides in alumino silicate ceramics is likely to result in dielectric breakdown due to Conductivity
Description : Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the (A) Presence of an inert atmosphere (B) Presence of a reducing atmosphere (C) Absence of air (D) Presence of an oxidising atmosphere
Last Answer : (C) Absence of air
Description : Which one of the following is a micro nutrient in the soil? A. Nitrogen B. Iron C. Phosphorus D. Calcium
Last Answer : B. Iron
Description : In context to agriculture what is Fallow Land ? a. Fallowing is the process to make the soil rich in phosphorus b. Agricultural land which is added with organic matter to reduce its ... . Agriculture field which is left unplanted so that the soil's natural nutrient balance can be restored
Last Answer : d. Agriculture field which is left unplanted so that the soil’s natural nutrient balance can be restored.
Description : In context to agriculture what is Fallow Land ? a. Fallowing is the process to make the soil rich in phosphorus b. Agricultural land which is added with organic matter to reduce its ... Agriculture field which is left unplanted so that the soil's natural nutrient balance can be restored.
Last Answer : d. Agriculture field which is left unplanted so that the soil’s natural nutrient balance can be restored
Description : Ruby and sapphire are oxides of - (1) capper (2) tin (3) iron (4) aluminium
Last Answer : (4) aluminium Explanation: Ruby and sapphire are oxides of aluminium. They are the important gems used in finger rings.
Description : Ruby and sapphire are oxides of – (1) copper (2) tin (3) iron (4) aluminium
Last Answer : (4) aluminium Explanation: Aluminium forms one stable oxide, known by its mineral name corundum. Sapphire and ruby are impure corundum contaminated with trace amounts of other metals. Corundum is a ... . Transparent specimens are used as gems, called ruby if red and padparadscha if pink-orange.
Description : Ruby and sapphire are oxides of (1) copper (2) tin (3) iron (4) aluminium
Last Answer : aluminium
Description : Match the following : A. Chernozems 1. Rich in calcium carbonate B. Black soil 2. Contains aluminium compound C. Laterite 3. Richest soils in the world D. Terra Rosa 4. Formed in limestone E. Alluvial soil 5. It is a mixture of clay, sand and ... 1 2 3 4 5 (b) 3 1 2 4 5 (c) 4 5 3 1 2 (d) 3 4 5 2 1
Description : In which one of the following pairs is the specific characteristic of a soil not correctly matched? (a) Laterite – Contains aluminium compound (b) Terra rosa – Most suitable for roses (c) Chernozems – Richest soil in the world (d) Black soil – Rich in calcium carbonate
Last Answer : (d) Black soil – Rich in calcium carbonate
Description : Red color in chilli is due to — pigment a. Capsanthin b. Alaglucoside c. Mimosin d. None of these
Last Answer : a. Capsanthin
Description : Of the following statements about the major soil types, the incorrect one is : (a) alluvial soils are easy to plough (b) red soils are rich in phosphorus, nitrogen and lime content ( ... regions which receive heavy seasonal rainfall (d) black soil is highly retentive of moisture and very productive
Description : Red soil is poor in which of the following nutrients ? (A) Phosphorus and Sulphur (B) Phosphorus and Nitrogen (C) Nitrogen and Zinc (D) Nitrogen and Potassium
Last Answer : (D) Nitrogen and Potassium
Description : A solution of sodium thiosulphate on addition of few drops of ferric chloride gives violet colour due to the formation of
Last Answer : A solution of sodium thiosulphate on addition of few drops of ferric chloride gives violet colour due to the formation of ... `Fe_(2)(S_(2)O_(3))_(2)`
Description : Pick up the correct statement from the following: (A) Rusting is caused due to combined action of air, moisture and carbon dioxide (B) During rusting, first ferrous bicarbonates are formed (C) On further oxidation ferrous bicarbonates get converted to ferric bicarbonates (D) All the above
Last Answer : Answer: Option D
Description : In a flame test the presence of calcium would cause what color flame?
Last Answer : ANSWER: RED (accept yellow-rez)
Description : Brass gets discoloured in air due to constant exposure in presence of: (1) Aluminium phosphide (2) Hydrogen sulphide (3) Hydrogenated wafers (4) Aluminium sulphide
Last Answer : (2) Hydrogen sulphide Explanation: Brass gets discoloured in air because of Hydrogen sulphide. Transition elements are coloured. The brass is combination of Zn and Cu. But it is discoloured due to hydrogen sulphide in air.
Last Answer : Hydrogen sulphide
Description : The products resulting from the atmospheric reactions of hydrocarbons and nitrogen oxides in the presence of sunlight are called
Last Answer : The products resulting from the atmospheric reactions of hydrocarbons and nitrogen oxides in the ... C. Tertiary pollutants D. Non-pollutants
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 : Which of the following elements has the atomic number greater than that of Phosphorus? (1) Aluminium (2) Silicon (3) Chlorine (4) Magnesium
Last Answer : (3) Chlorine Explanation: Chlorine is a chemical element with symbol Cl and atomic number 17. Phosphorus is a chemical element with symbol P and atomic number 15.
Description : Which of the following is not a donor atom? (1) Phosphorus (2) Antimony (3) Arsenic (4) Aluminium
Last Answer : (4) Aluminium Explanation: Aluminium is an acceptor atom, an impurity atom in a semiconductor, which can accept or take up one or more electrons from the crystal and become negatively charged. In semiconductor physics. It is a dopant atom that when added to a semiconductor can form a ptype region.
Last Answer : (4) Aluminium Explanation: Aluminium is an acceptor atom, an impurity atom in a semiconductor, which can accept or take up one or more electrons from the crystal and become negatively charged.
Last Answer : Aluminium
Description : Which of the following oxides is not present in hematite iron ore? (A) Titanium oxide (B) Calcium oxide (C) Cobalt oxide (D) Manganese oxide
Last Answer : (C) Cobalt oxide
Description : Consider the following statements : 1. Agricultural soils release nitrogen oxides into environment. 2. Cattle release ammonia into environment. 3. Poultry industry releases reactive nitrogen compounds into environment. Which of the statements ... and 3 only b) 2 and 3 only c) 2 only d) 1, 2 and 3
Last Answer : d) 1, 2 and 3
Description : Pick out the wrong statement. (A) Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate (B) Glass is decolorized during its manufacture by ... Na2O . CaO . 6SiO2 (D) Red color is imparted to glass by addition of arsenic oxide
Last Answer : (D) Red color is imparted to glass by addition of arsenic oxide
Description : Which type of N-fertilizer is suitable for water-logged soil? a) Zinc Phosphet b) Ammonium Sulphate c) Calcium d) Potassium Nitrate
Last Answer : b) Ammonium Sulphate
Description : For reclamation of alkaline soil — is used. a. Lime b. Calcium carbonate c. Gypsum d. None of these
Last Answer : c. Gypsum
Description : (a) Define a balanced chemical equation. Why should an equation be balanced? (b) Write the balanced chemical equation for the following reaction: (i) Phosphorus burns in presence of chlorine to form phosphorus penta chloride. (ii) Burning of natural gas. (iii) The process of respiration. -Chemistry
Last Answer : Answer. (a) Balanced chemical equation has an equal number of atoms of different elements in the reactants and products. According to law of conservation of mass, matter can neither be created nor be destroyed in a chemical ... C6H12O6 (s) + 6O2 (g) + 6H2O ---> 6CO2 (aq) + 12H2O (l) + energy
Description : Upon heating`KClO_(3)` in presence of catalytic amount of `MnO_(2)`, a gas `W` is formed. Excess amount of `W` reacts with white phosphorus to given `
Last Answer : Upon heating`KClO_(3)` in presence of catalytic amount of `MnO_(2)`, a gas `W` is formed. Excess amount of `W` ... PO_(4)` D. `N_(2)O_(5) and HPO_(3)`
Description : Permanent hardness of water is due to the presence of calcium & magnesium (A) Bi-carbonates (B) Sulphates & chlorides (C) Carbonate (D) None of these
Last Answer : (B) Sulphates & chlorides
Description : A person is having problems with calcium and phosphorus metabolism in his body. Which one of the following glands may not be functioning properly ?
Last Answer : A person is having problems with calcium and phosphorus metabolism in his body. Which one of the ... . Thyroid B. Parathyroid C. Parotid D. Pancreas