Description : A metal oxide has `40%` oxygen. The equivalent weight of the metal is:
Last Answer : A metal oxide has `40%` oxygen. The equivalent weight of the metal is:
Description : If the equivalent weight of an element is 32, then the percentage of oxygen in its oxide is :
Last Answer : If the equivalent weight of an element is 32, then the percentage of oxygen in its oxide is : A. 16 B. 40 C. 32 D. 20
Description : X gm of metal gave Y gm of its oxide, so equivalent mass of metal is :
Last Answer : X gm of metal gave Y gm of its oxide, so equivalent mass of metal is : A. `(y-x)/(x)xx8` B. `(x)/((y-x))xx8` C. `(x)/(y)xx8` D. `(x+y)/(x)xx8`
Description : `3 g` of an oxide of a metal is converted completely to `5 g` chloride. Equivalent weight of metal is:
Last Answer : `3 g` of an oxide of a metal is converted completely to `5 g` chloride. Equivalent weight of metal is: A. 33.25 B. 3.325 C. 12 D. 20
Description : If the impurity in a metal has a greater affinity for oxygen and is more easily oxidised than the metal, then the purification of metal may be carried
Last Answer : If the impurity in a metal has a greater affinity for oxygen and is more easily oxidised than ... B. electrorefining C. Zone refining D. POILING
Description : The law of definite proportions is not applicable to nitrogen oxide because [EAMCET 1981] (A) Nitrogen’s atomic weight is not constant (B) Nitrogen’s molecular weight is variable (C) Nitrogen’s equivalent weight is variable (D) Oxygen’s atomic weight is variable
Last Answer : (C) Nitrogen’s equivalent weight is variable
Description : Two samples of lead oxide were separately reduced to metallic lead by heating in a current of hydrogen. The weight of lead from one oxide was half the weight of lead obtained from the other oxide. ... (B) Law of constant proportions (C) Law of multiple proportions (D) Law of equivalent proportions
Last Answer : (C) Law of multiple proportions
Description : The international pitch A is equivalent to ___ Hz. A. 435 B. 440 C. 260 D. 255
Last Answer : A. 435
Description : Acrylic sheets (A) Possess 10 to 17 times greater breakage resistance than that of glass of equivalent thickness (B) Are generally unaffected by most household detergents (C) Possess the light transmission rate of 93% (D) All the above
Last Answer : Answer: Option D
Description : The oxide of a metal (R ) can be reduced by the metal (P) and metal (R ) can reduce the oxide of metal (Q). Then the decreasing order of the reactivit
Last Answer : The oxide of a metal (R ) can be reduced by the metal (P) and metal (R ) can reduce the oxide of metal (Q). Then ... C. `R gt P gt Q` D. `Q gt P gt R`
Description : A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that - ... change in momentum (4) The initial momentum of the rubber ball is greater than that of the metal ball
Last Answer : (1) The rubber ball suffers greater change in momentum
Description : A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that ( ... change in momentum (4) The initial momentum of the rubber ball is greater than that of the metal ball
Last Answer : The rubber ball suffers greater change in momentum
Description : Silver gets corroded due to ___ in air. (1) Oxygen (2) Hydrogen Sulphide (3) Carbon dioxide (4) Nitrogen
Last Answer : Hydrogen Sulphide
Description : 1 mole of `OH^(-)` ions is obtained from 85 g of hydroxide of a metal. What is the equivalent weight of the metal ?
Last Answer : 1 mole of `OH^(-)` ions is obtained from 85 g of hydroxide of a metal. What is the equivalent weight of the metal ?
Description : 1.12 litre dry chlorine gas at STP was passed over a heated metal when 5.56 g of chloride of the metal was formed. What is the equivalent weight of th
Last Answer : 1.12 litre dry chlorine gas at STP was passed over a heated metal when 5.56 g of chloride of ... formed. What is the equivalent weight of the metal ?
Description : 74.5 g of a metallic chloride contains 35.5 g of chlorine. The equivalent weight of the metal is [CPMT 1986] (A) 19.5 (B) 35.5 (C) 39.0 (D) 78.0
Last Answer : (C) 39.0
Description : A current of 4 amperes flowing for 45 minutes deposits 1.062 gm of metal at cathode. Calculate the equivalent weight of the metal. (Given 1 Faraday = 96500 C)
Last Answer : Given: c : 4 amperes t : 45 minutes : 45 x 60 = 2700 seconds w : 1.062 gm 1 Faraday : 96500 C To calculate: Eq. Weight (CE) According to Faraday's first law: w = z c t Therefore, z = w / ct ... g/c Now, C.E. = 96500 x E.C.E. C. E. = 96500 x 0.00009833 C.E. = 9.4888 gm
Description : If a material object moves with the speed of light ‘c’ its mass becomes a) equal to its rest mass b) Four times of its rest mass c) Double of its rest mass d) Infinite
Last Answer : d) Infinite
Description : The rate at which a chemical substance reacts is proportional to its (A) Active mass (B) Molecular weight (C) Equivalent weight (D) Atomic weigh
Last Answer : (A) Active mass
Description : The rate at which a chemical substance reacts is proportional to its (A) Active mass (B) Equivalent weight (C) Molecular weight (D) None of these
Description : Which of the following statement(s) is/are true concerning oxygen kinetics in a critically ill, febrile patient? a. Oxygen consumption will likely exceed three times normal b. The high cardiac ... adequate compensation as long as the oxygen delivery/oxygen consumption rate is greater than 2:1
Last Answer : Answer: b, d In critically ill patients oxygen consumption may be elevated or depressed, but slight to moderate elevations in oxygen consumption is the most common abnormality in critically ill patients. ... however, and the patient will remain stable as long as the ratio is greater than 2:1
Description : The toxic effect of carbon monoxide is due to its greater affinity for haemoglobin as compared to oxygen approximately by (a) 200 times (b) 1000 times (c) 2 times (d) 20 times.
Last Answer : (a) 200 times
Description : If the mass of body increases A Frequency increases 4 times B Frequency decreases 4 times C Frequency become half D Frequency become double
Last Answer : C Frequency become half
Description : If the mass of body increases 4 times A Frequency increases 4 times B Frequency decreases 4 times C Frequency become half D Frequency become double
Description : The dry density of soil is a) Always greater than the saturated density b) Weight of soil solids per unit of total volume prior to drying* c) Total weight of soil solids per unit of its total volume d) Total weight of soil mass per unit of its total volume
Last Answer : b) Weight of soil solids per unit of total volume prior to drying*
Description : Heavy water' is termed as 'heavy' because it is (A) Denser than water (B) An oxide of deuterium (C) A heavy liquid (D) An oxide of heavier isotope of oxygen
Last Answer : (B) An oxide of deuterium
Description : Of the following choices, approximately how many times greater is the mass of a proton than the mass of an electron? w) 200 x) 2000 y) 20,000 z) 200,000
Last Answer : ANSWER: X -- 2000
Description : Organic nitrates have predominantly venodilator action because: A. They are selectively concentrated in veins B. Veins express larger quantities of enzymes that generate nitric oxide from nitrates C. Venous smooth muscle has greater capacity to relax D. All of the above are correct
Last Answer : B. Veins express larger quantities of enzymes that generate nitric oxide from nitrates
Description : If a trolley collides with a stationary trolley of double mass, then they move off with A. half of the original velocity B. one third of original velocity C. double the original velocity D. triple the original velocity
Last Answer : one third of original velocity
Description : If the mass of the constraint is negligible then what is the kinetic energy of the system? a) 0 b) Half the value c) Double the value d) Infinite
Last Answer : a) 0
Description : what 1o times as much as ___ 1/10 of 7,000?
Last Answer : 700
Description : (A) Auto reduction of ore is used for the extraction of copper (R ) The sulphide ore of copper reacts with its oxide to the give the metal
Last Answer : (A) Auto reduction of ore is used for the extraction of copper (R ) The sulphide ore of copper reacts ... . If (A) is incorrect but (R ) is correct
Description : Which metal is protected by the layer of its own oxide?
Last Answer : Aluminum
Description : The formation of oxide film on a metal due to atmospheric exposure reduces its (A) Toughness (B) Stiffness (C) Creep limit (D) All (A), (B) & (C)
Last Answer : (C) Creep limit
Description : Which metal is protected by the layer of its own oxide? (A) Iron (B) Silver (C) Calcium (D) Aluminium
Last Answer : (D) Aluminium
Description : Oxide layer formed on the non-ferrous metal surface after its annealing is (A) Removed by acid pickling (B) Hammered into the surface (C) Removed with coarse emery cloth
Last Answer : Option A
Description : In which of the following conversions all the three oxygen atoms of `O_(3)` molecules are utilised for oxidation: I. Ferrous oxide to ferric oxide II.
Last Answer : In which of the following conversions all the three oxygen atoms of `O_(3)` molecules are utilised for ... and IV only D. II, III and IV only
Description : Oxygen as a super oxide is in the form of
Last Answer : Oxygen as a super oxide is in the form of A. `O_(2)^(-2)` B. `O^(-2)` C. `O_(2)^(-)` D. `O^(-)`
Description : Which of the following gases is present under pressure in soft drinks? (1) Oxygen (2) Nitrogen (3) Carbon dioxide (4) Nitrous oxide
Last Answer : (3) Carbon dioxide Explanation: Carbon dioxide is present under pressure in soft drinks. Carbon dioxide adds that special sparkle and bite to the beverage and also acts as a mild preservative. Carbon ... for soft drinks because it is inert, non-toxic, and relatively inexpensive and easy to liquefy.
Description : Commercial nitric acid is coloured because it contains dissolved – (1) Oxygen (2) Nitrous oxide (3) Nitrogen dioxide (4) Coloured impurities
Last Answer : (3) Nitrogen dioxide Explanation: Commercial nitric acid has a brown colour due to dissolved NO2. The procedure of bubbling dry air through warm commercial nitric acid, is to drive away the dissolved nitrogen dioxide so that the acid becomes colourless.
Description : 45.4 L of nitrogen reacted with 22.7 L of oxygen and 45.4 L of nitrogen oxide was formed. The reaction is given below: 2N2(g) + O2(g) →2N2O(g) Which law is being obeyed in this experiment? Write the statement of this law.
Last Answer : Ans. Gay lussac’s law of gaseous volume is being obeyed. According to gay lussac’s law of gaseous volumes, gases combine or are produced in a chemical reaction in a simple ration by volume, provided that all gases are the same temperature and pressure.
Description : Write balanced chemical equations for the following word equations: (a) Iron + Chlorine → Iron (III) chloride (b) Magnesium + dil sulphuric acid → Magnesium sulphate + water (c) Magnesium + oxygen → ... oxide (d) Calcium oxide + water → Calcium hydroxide (e) Sodium + chlorine → Sodium chloride
Last Answer : (a) Iron + Chlorine → Iron (III) chloride 4Fe + 3Cl2 → 2F2Cl3 (b) Magnesium + dil sulphuric acid → Magnesium sulphate + water 2Mg + 2H2SO4 → 2MgSO4 + 2H2 (c) Magnesium + oxygen → Magnesium oxide 2Mg ... hydroxide CaO + H2O → Ca(OH)2 (e) Sodium + chlorine → Sodium chloride 2Na + Cl2 → 2NaCl
Description : Which of the following is not including in the Greenhouse gases: C A. Methane B. Carbon dioxide C. Oxygen D. Nitrous Oxide
Last Answer : Oxygen
Description : The product (s) of roasting of a sulphide ore is (are) (A) Oxide only (B) Sulphate only (C) Oxide and sulphate (D) Dependent on temperature and partial pressure of oxygen & sulphur dioxide
Last Answer : (A) Oxide only
Description : _______ is highly poisonous gas produced as a result of incomplete combustion. a) oxygen b)carbon dioxide c)carbon mono oxide d)soot
Last Answer : c)carbon mono oxide
Description : ________ present in air helps in combustion of fuel. a) oxygen b)nitrogen c)carbon-di-oxide d)carbon –mono-oxide
Last Answer : a) oxygen
Description : 'Diffusion hypoxia’ is likely to occur only after use of nitrous oxide because it: A. Is a respiratory depressant B. Has low blood solubility and is used in high concentration C. Is a very potent anaesthetic D. Interferes with diffusion of oxygen into the tissues
Last Answer : B. Has low blood solubility and is used in high concentration
Description : Global climate change is being attributed to the atmospheric increase in what two gases produced by human activities? w) oxygen and hydrogen x) ozone and methane y) nitrous oxide and sulfur dioxide z) methane and carbon dioxide e) ozone and carbon monoxide
Last Answer : ANSWER: Z -- METHANE AND CARBON DIOXIDE
Description : Which of the following materials are used in the manufacture of pig iron from iron ore? w) Limestone and carbon x) Calcium oxide and oxygen y) Chromium and nickel z) Oxygen and sulfur dioxide
Last Answer : ANSWER: W -- LIMESTONE AND CARBON