Description : The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their acid-base characteristics or on
Last Answer : The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their ... P_(2)O_(5)` D. `FeO, CuO`
Last Answer : The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their ... `Mn_(3)O_(4),N_(2)O_(5)`
Last Answer : The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their ... C. CO,NO D. `Na_(2),CaO`
Last Answer : The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their acid- ... . `N_(2)O, C_(3)O_(2)`
Description : Polymers are classified into four categories namely thermosetting, thermoplastic, elastomer and fibre depending upon their (A) Molecular sizes (B) Magnitude of intermolecular forces (C) Resistance to heat (D) Polymerisation mechanism
Last Answer : (B) Magnitude of intermolecular forces
Description : Pick out the correct statement. (A) A fat is converted into oil by its hydrogenation (B) There is no difference between a fat and an oil so far as its physical properties are ... Vegetable oils are classified as drying, non-drying and semi drying oils depending upon their fatty acids content
Last Answer : (C) All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms
Description : Name either of the elements which, in the form of oxides, contributes to the formation of acid rain.
Last Answer : ANSWER: NITROGEN OR SULFUR
Description : Rocks are classified depending upon how they are formed. In which class would marble be found?
Last Answer : ANSWER: METAMORPHIC
Description : Rocks are classified depending upon how they are formed. In which class would slate be found?
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 one of the following statements concerning elements in the Periodic Table is correct? A Elements of the same group all have the same number of electrons in the outermost occupied electron shell. B ... (Group 17) are all gases at room temperature. E The Group 13 elements are all metals.
Last Answer : D) Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron
Description : Assertion : All muscle follow " all or none" principle. Reason : All muscles contract either fully or do not contract at all depending upon the thresh
Last Answer : Assertion : All muscle follow " all or none" principle. Reason : All muscles contract either fully or ... . D. If both Assertion and Reason are false.
Description : In hydrodynamic bearing, (A) The axis of journal is eccentric with respect to axis of bearing (B) The axis of journal is concentric with respect to axis of bearing (C) The axis can be either eccentric or concentric depending upon speed (D) None of the above
Last Answer : (A) The axis of journal is eccentric with respect to axis of bearing
Description : In hydrostatic bearing, (A) The axis of journal is eccentric with respect to axis of bearing (B) The axis of journal is concentric with respect to axis of bearing (C) The axis can be either eccentric or concentric depending upon speed (D) None of the above
Last Answer : (B) The axis of journal is concentric with respect to axis of bearing
Description : In partial order plan. A. Relationships between the actions of the behavior are set prior to the actions B. Relationships between the actions of the behavior are not set until absolutely necessary Choose the ... ) Either A or B can be true depending upon situation d) Neither A nor B is true
Last Answer : a) A is true
Description : In case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is __________ the outlet temperature of the cold fluid. (A) Equal to (B) More than (C) Less than (D) Either more or less than (depending upon the fluid)
Last Answer : (A) Equal to
Description : Depending upon the properties of a material, the failure envelope may (A) Be either straight or curved (B) Pass through the origin of stress (C) Intersect the shear stress axis (D) All the above
Last Answer : (D) All the above
Description : The work done by a friction force is: w) always positive x) always negative y) always zero z) either positive or negative depending upon the situation.
Last Answer : ANSWER: X -- ALWAYS NEGATIVE
Description : Oxygen which is vital for life is a product of photosynthesis and comes from – (1) carbonates from soil (2) carbon dioxide (3) water (4) oxides of mineral elements
Last Answer : (3) water Explanation: The unusually high concentration of oxygen has on Earth is the result of the oxygen cycle. This biogeochemical cycle describes the movement of oxygen within and ... Photosynthesis releases oxygen into the atmosphere, while respiration and decay remove it from the atmosphere.
Description : Oxygen which is vital for life is a product of photosynthesis and comes from (1) carbonates from soil (2) carbon dioxide (3) water (4) oxides of mineral elements
Last Answer : water
Description : Which of the following elements react with metals to form their binary compounds exhibiting `-3` oxidation state ?
Last Answer : Which of the following elements react with metals to form their binary compounds exhibiting `-3` oxidation state ? A. N B. P C. As D. Bi
Description : IN which set do all elements tend to form anions in binary ionic compounds Question 3 options N S I Ca B K K Ga Pb Fe Hg Na?
Last Answer : Need answer
Description : Metallic oxides which react with both acid and base to produce salt and water are called A) Neutral Oxides B) Basic Oxides C) Amphoteric Oxides D) Acidic Oxides
Last Answer : C) Amphoteric Oxides
Description : Addition polymerisation takes place either by a free radical mechanism or ionic mechanism depending on the reagents used. Free radical polymerisation is catalyzed by __________, which decompose to give free radicals. (A) Organic peroxides (B) Sulphuric acid (C) Hydrofluoric acid (D) None of these
Last Answer : (A) Organic peroxides
Description : Which of the following chemical reactions does not lead to formation of a salt? w) Reaction of salts with acids. x) The reaction of base anhydrides with acid anhydrides. y) Action of water on oxides of nonmetals. z) Reaction of acid with base.
Last Answer : ANSWER: Y -- ACTION OF WATER ON OXIDES OF NONMETALS. (If water reacts with oxides of nonmetals, an acid is formed.)
Description : The advantage(s) of using carbon to reduce a number of oxides and other compounds are :
Last Answer : The advantage(s) of using carbon to reduce a number of oxides and other compounds are : A. ... of carbon lowers the melting point of the oxides
Description : Oxygen differs from the other elements of the group. Compounds of oxygen with metals are more ionic in nature and hydrogen bonding is more important f
Last Answer : Oxygen differs from the other elements of the group. Compounds of oxygen with metals are more ionic in nature ... H_(2)O lt H_(2)Te -` boiling point
Last Answer : Oxygen differs from the other elements of the group. Compounds of oxygen with metals are more ... oxides are usually covalent and acidic in nature
Description : Depending on the chemical composition and mechanical properties, iron may be classified as (A) Cast iron (B) Wrought iron (C) Steel (D) All the above
Last Answer : Answer: Option D
Description : The theory that individuals act depending upon their evaluation of whether their effort will lead to good performance, whether good performance will be followed by a reward, and whether that reward is attractive ... Equity Theory ; (b) Expectancy Theory ; (c) Empirical Theory ; (d) Outcome Theory
Last Answer : (b) Expectancy Theory ;
Description : The thermal efficiency of a diesel cycle having fixed compression ratio with increase in cut-off ratio will a. increase b. decrease c. independent d. increase or decrease depending upon other factors
Last Answer : ANSWER b. decrease
Description : What is the nature of interference pattern at the contact edge of wedge shaped film (a) Always bright (b) Always dark (c) Bright or dark depending upon the thickness of other end (d) Bright or dark depending upon the wavelength of the light
Last Answer : (b) Always dark
Description : Which of the following compounds on thermal decomposition yields as basic as well as acidic oxides ?
Last Answer : Which of the following compounds on thermal decomposition yields as basic as well as acidic oxides ? A. `Ca(OH)_(2) ... C. `K_(2)CO_(3)` D. `MgCO_(3)`
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 : Members of which of the following classes of compounds generally produce acidic solutions when dissolved in water? w) metal oxides x) nonmetal oxides y) alcohols z) aldehydes
Last Answer : ANSWER: X -- NONMETAL OXIDES
Description : Some organizations have escalator clause in their labour agreements. What does this clause provide for ? (A) Automatic increase in wage/salary depending on seniority (B) Wage increase depending on output ... index (D) Automatic increase in wage/salary depending on increase in profits of the firm
Last Answer : Answer: Automatic increase in wage/salary depending on increase in profits of the firm
Description : Two transformers operating in parallel will share the load depending upon their (A) Rating. (B) Leakage reactance. (C) Efficiency. (D) Per-unit impedance.
Last Answer : Ans: A Transformers having higher kVA rating will share more load.
Description : Two transformers operating in parallel will share the load depending upon their
Last Answer : Two transformers operating in parallel will share the load depending upon their Per unit impedance
Description : The devices marked 'T' in the illustration are _____________. EL-0080 A. trouble alarm units whose contacts activate when problems arise either on starting or stopping of the motor B. topping ... contactor parts whose contacts start and stop the defrosting cycle of the compressor driven by the motor
Last Answer : Answer: C
Description : DNA fragments are (a) negatively charged (b) neutral (c) either positively or negatively charged depending on their size (d) positively charged
Last Answer : (a) negatively charged
Description : DNA fragments are: (1) Negatively charged (2) Neutral (3) Either positively or negatively charged depending on their size (4) Positively charged
Last Answer : (1) Negatively charged
Description : Which of the following is/are not the characteristics of red soils? 1. They are derived from weathering of old crystalline and metamorphic rocks 2. They contain iron oxides 3. They have high water retention capacity 4. They ... nitrogen content (a) II and III (b) Only III (c) Only IV (d) III and IV
Last Answer : Ans: (d)
Description : (a) What are groups' and periods' in the periodic table'? (b) Two elements M and N belong to group I and II respectively and are in the same period of the periodic ... Sizes of their atoms Their metallic characters Their valencies in forming oxides Molecular formulae of their chlorides -Science
Last Answer : (a) The vertical columns in the periodic table are called groups'. The horizontal rows in the periodic table are called periods'. (b) M' and N' belong to same period but group I ... oxides. Valency goes on increasing first and then decreases. MCI, NCI2 are molecular formulae of their chlorides.
Description : How Aluminum iron copper and oxygen are all examples of what compounds mixtures elements gases?
Description : Two elements which can form a large number of compounds are (1) Carbon and Hydrogen (2) Carbon and Nitrogen (3) Carbon and Oxygen (4) Carbon and Sulphur
Last Answer : (1) Carbon and Hydrogen Explanation: The carbon-hydrogen bond (C-H bond) is a bond between carbon and hydrogen atoms that can be found in many organic compounds. Compound classes ... bonds are alkanes, alkenes, alkynes, and aromatic hydrocarbons. Collectively they are known as hydrocarbons.
Last Answer : Carbon and Hydrogen
Description : Nitrogen forms the largest number of oxides as it is capable of forming stable multiple bonds with oxygen. They range from `N_(2)O` (O.S of nitrogen +
Last Answer : Nitrogen forms the largest number of oxides as it is capable of forming stable multiple bonds with ... red D. Nitrogen dioxide is not acidic oxide