Oxygen has (+) oxidation number only in (1) OF2 (2) Cl2O (3) H2O (2) N2O

Oxygen has (+) oxidation number only in (1) OF2 (2) Cl2O (3) H2O (2) N2O
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OF2
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Oxygen has (+) oxidation number only in – (1) OF2 (2) Cl2O (3) H2O (4) N2O

Description : Oxygen has (+) oxidation number only in – (1) OF2 (2) Cl2O (3) H2O (4) N2O

Last Answer : (1) OF2 Explanation: In case of F2O, oxygen is not the most electronegative element. The fluorine is more electronegative and has an oxidation state of -1. In this case, the oxygen has an oxidation state of +2.

What is OF2 compound name?

Description : What is OF2 compound name?

Last Answer : This compound is oxygen difluoride.

CuO + H2 = Cu + H2O. This equation is an example of - (1) Oxidation (2) Decomposition (3) Reduction (4) Redox

Description : CuO + H2 = Cu + H2O. This equation is an example of - (1) Oxidation (2) Decomposition (3) Reduction (4) Redox

Last Answer : (4) Redox

The chemical formula of the laughing gas is – (1) NO (2) N2O (3) NO2 (4) N2O3

Description : The chemical formula of the laughing gas is – (1) NO (2) N2O (3) NO2 (4) N2O3

Last Answer : (2) N2O Explanation: Nitrous oxide, commonly known as laughing gas, is a chemical compound with the formula N2O. It is an oxide of nitrogen.

Which of the following is used as anesthetic? (1) NH3 (2) NO (3) NO2 (4) N2O

Description : Which of the following is used as anesthetic? (1) NH3 (2) NO (3) NO2 (4) N2O

Last Answer : (2) NO Explanation: Nitrous oxide (NO), commonly known as laughing as or happy gas, is the most commonly used inhalation anesthetic in dentistry and is commonly used in emergency centers ... inorganic inhalation agent that is colorless, odorless to sweet-smelling, and nonirritating to the tissues.

Which of the following is used as anesthetic ? (1) NH3 (2) NO (3) NO2 (4) N2O

Description : Which of the following is used as anesthetic ? (1) NH3 (2) NO (3) NO2 (4) N2O

Last Answer : NO

The chemical formula of the laughing gas is (1) NO (2) N2O (3) NO2 (4) N2O3

Description : The chemical formula of the laughing gas is (1) NO (2) N2O (3) NO2 (4) N2O3

Last Answer : N2O

When conc. H2 SO4 is added to dry KNO3 , brown fumes are evolved. These fumes are due to (1) SO3 (2) SO2 (3) NO2 (4) N2O

Description : When conc. H2 SO4 is added to dry KNO3 , brown fumes are evolved. These fumes are due to (1) SO3 (2) SO2 (3) NO2 (4) N2O

Last Answer : NO2

Shouldn't H2O be in liquid state after hydrogen and oxygen react?

Description : Shouldn't H2O be in liquid state after hydrogen and oxygen react?

Last Answer : Never mind, I figured it out: When hydrogen burns in oxygen it produces water in some form and heat. Now what form would the water take if it were really hot? A gas. Now, what will the water ... phase after the reaction. And most of the water really will condense to the liquid phase as it cools.

Complete oxidation of one molecule of glucose into CO2 and H2O yields (A) 8 ATP equivalents (B) 15 ATP equivalents (C) 30 ATP equivalents (D) 38 ATP equivalents

Description : Complete oxidation of one molecule of glucose into CO2 and H2O yields (A) 8 ATP equivalents (B) 15 ATP equivalents (C) 30 ATP equivalents (D) 38 ATP equivalents

Last Answer : Answer : D

During each cycle of on going fatty acid oxidation, all the following compounds are generated except (A) H2O (B) Acetyl CoA (C) Fatty acyl CoA (D) NADH FATS AND FATTY ACID METABOLISM 103

Description : During each cycle of on going fatty acid oxidation, all the following compounds are generated except (A) H2O (B) Acetyl CoA (C) Fatty acyl CoA (D) NADH FATS AND FATTY ACID METABOLISM 103

Last Answer : Answer : A

During each cycle of β-oxidation of fatty acid, all the following compounds are generated except (A) NADH (B) H2O (C) FAD (D) Acyl CoA

Description : During each cycle of β-oxidation of fatty acid, all the following compounds are generated except (A) NADH (B) H2O (C) FAD (D) Acyl CoA

Last Answer : Answer : B

How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to CO2 and H2O yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal? (a) 1 (b) 2 (c) 30 (d) 57

Description : How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to CO2 and H2O yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal? (a) 1 (b) 2 (c) 30 (d) 57

Last Answer : d) 57

When steam is passed over coal resulting in the endothermic reaction represent by, C + H2O = CO + H2 , it is called the __________ of coal. (A) Carbonisation (B) Oxidation (C) Coalification (D) Gasification

Description : When steam is passed over coal resulting in the endothermic reaction represent by, C + H2O = CO + H2 , it is called the __________ of coal. (A) Carbonisation (B) Oxidation (C) Coalification (D) Gasification

Last Answer : (D) Gasification

Is N2O a heterogeneous?

Description : Is N2O a heterogeneous?

Last Answer : Compound, not a mixture

How many moles of N are in 0.223 g of N2O?

Description : How many moles of N are in 0.223 g of N2O?

Last Answer : The number of nitrogen moles is 0,01.

Which of the following is used as anaesthetics? (1) N2 (2) N2O (3) CHI (4) CO2

Description : Which of the following is used as anaesthetics? (1) N2 (2) N2O (3) CHI (4) CO2

Last Answer : (2) N2O Explanation: Nitrous oxide (N2O) is a colorless, odorless gas that is used as an anesthetic and analgesic. It is used in surgery and dentistry for its anaesthetic and analgesic effects ... effects of inhaling it, a property that has led to its recreational use as a dissociative anaesthetic.

Which one of the following is a most harmful pollutant by automobiles? (a) SO2 (b) CO (c) N2O (d) CO2

Description : Which one of the following is a most harmful pollutant by automobiles? (a) SO2 (b) CO (c) N2O (d) CO2

Last Answer : (b) CO

Which one is neutral in character? (A) N2O4 (B) N2O (C) N2O5 (D) N2O3

Description : Which one is neutral in character? (A) N2O4 (B) N2O (C) N2O5 (D) N2O3

Last Answer : (B) N2O

N2O excretes through: A. Urine B. Lungs

Description : N2O excretes through: A. Urine B. Lungs

Last Answer : B. Lungs

Which of the following is correct about Nitrous Oxide N2O: A. N2O has high analgesic and low anaesthetic property at its minimum anaesthetic dose. “Low MAC; Max Anaesthetic Concentration” B. Absolutely contraindicated in pregnancy C. Has low blood diffusibility and result in hypoxia D. It is good anaesthetic and low MAC

Description : Which of the following is correct about Nitrous Oxide N2O: A. N2O has high analgesic and low anaesthetic property at its minimum anaesthetic dose. Low MAC; Max Anaesthetic Concentration B. Absolutely ... C. Has low blood diffusibility and result in hypoxia D. It is good anaesthetic and low MAC

Last Answer : C. Has low blood diffusibility and result in hypoxia

Nitrous Oxide (N2O) is not used alone as a general anaesthetic agent because of:** A. Difficulties in maintaining an adequate O2 concentration B. Adverse affects on liver C. Poor analgesics affects

Description : Nitrous Oxide (N2O) is not used alone as a general anaesthetic agent because of:** A. Difficulties in maintaining an adequate O2 concentration B. Adverse affects on liver C. Poor analgesics affects

Last Answer : C. Poor analgesics affects

The main precursors of winter smog are (A) N2O and hydrocarbons (B) NOx and hydrocarbons (C) SO2 and hydrocarbons (D) SO2 and ozone

Description : The main precursors of winter smog are (A) N2O and hydrocarbons (B) NOx and hydrocarbons (C) SO2 and hydrocarbons (D) SO2 and ozone

Last Answer : (C) SO2 and hydrocarbons

Which of the following is used as anaesthetics? (1) N2 (2) N2O (3) CH4 (4) CO2

Description : Which of the following is used as anaesthetics? (1) N2 (2) N2O (3) CH4 (4) CO2

Last Answer : Stem

The point of ultra-supercritical steam generator is to save on coal to heat the water and reduce ________ emissions. a. Oxygen (O2) b. Water (H2O) c. Carbon dioxide (CO2) d. Both ‘a’ and ‘c’

Description : The point of ultra-supercritical steam generator is to save on coal to heat the water and reduce ________ emissions. a. Oxygen (O2) b. Water (H2O) c. Carbon dioxide (CO2) d. Both ‘a’ and ‘c’

Last Answer : c. Carbon dioxide (CO2)

This early atmosphere was rich in CO2 and H2O. How did oxygen enter our atmosphere? (a) Meteorites. (b) From organisms that evolved to convert CO2 and H20 into sugars (energy), resulting in the waste product oxygen. (c) Volcanic emissions. (d) Methanogenic bacteria.

Description : This early atmosphere was rich in CO2 and H2O. How did oxygen enter our atmosphere? (a) Meteorites. (b) From organisms that evolved to convert CO2 and H20 into sugars (energy), resulting in the waste product oxygen. (c) Volcanic emissions. (d) Methanogenic bacteria.

Last Answer : (b) From organisms that evolved to convert CO2 and H20 into sugars (energy), resulting in the waste product oxygen.

(2) amount of oxygen used for biochemical oxidation Explanation: Biochemical oxygen demand or B.O.D. is the amount of dissolved oxygen needed by aerobic biological organisms in a body of water to break down organic material present in a given water sample at certain temperature over a specific time period. The term also refers to a chemical procedure for determining this amount. This is not a precise quantitative test, although it is widely used as an indication of the organic quality of water.

Description : (2) amount of oxygen used for biochemical oxidation Explanation: Biochemical oxygen demand or B.O.D. is the amount of dissolved oxygen needed by aerobic biological organisms in a body of water to ... quantitative test, although it is widely used as an indication of the organic quality of water.

Last Answer : The addition of gypsum to port-land cement helps in : (1) increasing the strength of cement (2) rapid setting of cement (3) preventing rapid setting of cement (4) reduction in the cost of cement

Which of the following causes the rusting of iron? a. Oxidation b. Reduction c. Chemical reaction with oxygen d. Chemical reaction with CO2 (1) a and b (2) b and c (3) c and d (4) a and c

Description : Which of the following causes the rusting of iron? a. Oxidation b. Reduction c. Chemical reaction with oxygen d. Chemical reaction with CO2 (1) a and b (2) b and c (3) c and d (4) a and c

Last Answer : a and c

The BOD values of water indicate the (1) amount of organic debris (2) amount of oxygen used for biochemical oxidation (3) amount of oxygen used for biochemical reduction (4) amount of ozone used for biochemical oxidation

Description : The BOD values of water indicate the (1) amount of organic debris (2) amount of oxygen used for biochemical oxidation (3) amount of oxygen used for biochemical reduction (4) amount of ozone used for biochemical oxidation

Last Answer : amount of oxygen used for biochemical oxidation

Compare the following complexes with respect to their shape, magnetic behaviour and the hybrid orbitals involved : (i) [CoF4]2- (ii) [Cr(H2O)2(C2O4)2]– (iii) [Ni(CO)4] (Atomic number : Co = 27, Cr = 24, Ni = 28) -Chemistry

Description : Compare the following complexes with respect to their shape, magnetic behaviour and the hybrid orbitals involved : (i) [CoF4]2- (ii) [Cr(H2O)2(C2O4)2]– (iii) [Ni(CO)4] (Atomic number : Co = 27, Cr = 24, Ni = 28) -Chemistry

Last Answer : (i) [COF4]2_ : Tetrafluorido cobalt (III) ion Coordination number = 4 Shape = Tetrahedral Hybridisation = sp3 Important Questions for Class 12 Chemistry Chapter 9 Coordination Compounds Class 12 Important Questions 7

Positive oxidation state of oxygen is possible only in–

Description : Positive oxidation state of oxygen is possible only in–

Last Answer : OF2

Positive oxidation state of oxygen is possible only in

Description : Positive oxidation state of oxygen is possible only in

Last Answer : OF2

a) 110 g of salt is present in 550g of solution. Calculate the concentration of solution. b) 10 ml of H2SO 4 is dissolved in 90 ml of H2O. Calculate the concentration of solution. -Chemistry

Description : a) 110 g of salt is present in 550g of solution. Calculate the concentration of solution. b) 10 ml of H2SO 4 is dissolved in 90 ml of H2O. Calculate the concentration of solution. -Chemistry

Last Answer : The concentration of salt is determined by the division of mass of the solute by the mass of the solution and the percentage is obtained by multiplying the value by 100. The quotient of the division of 110 by 550 is 0.2 here. So after multiplying it with 100, it is 20%. So the concentration is 20%.

Identify the type of reaction(s) in the following equations. (i)CH4 + 2O2 CO2 + 2 H2O (ii) Pb(NO3)2 + 2KI ——–>Pbl2 + 2KNOs (iii) CaO + H2O ——–> Ca(OH)2 (iv) CuSO4 + Zn ——–> ZnSO4 + Cu -Chemistry

Description : Identify the type of reaction(s) in the following equations. (i)CH4 + 2O2 CO2 + 2 H2O (ii) Pb(NO3)2 + 2KI ——–>Pbl2 + 2KNOs (iii) CaO + H2O ——–> Ca(OH)2 (iv) CuSO4 + Zn ——–> ZnSO4 + Cu -Chemistry

Last Answer : Answer. (i) Combustion reaction and oxidation reaction. (ii)Double displacement reaction and precipitation reaction. (iii) Combination reaction. (iv) Displacement reaction.

[Fe(H2O)6]3+ is strongly paramagnetic whereas [Fe(CN)6]3- is weakly paramagnetic. Explain. (At. no. Fe = 26) -Chemistry

Description : [Fe(H2O)6]3+ is strongly paramagnetic whereas [Fe(CN)6]3- is weakly paramagnetic. Explain. (At. no. Fe = 26) -Chemistry

Last Answer : In both the cases, Fe is in oxidation state +3. Outer electronic configuration of Fe+3 is : In the presence of CN-, the 3d electrons pair up leaving only one unpaired electron. The ... sp3d2 forming an outer orbital complex. As it contains five unpaired electrons so it is strongly paramagnetic. .

Name the following coordination compounds according to IUPAC system of nomenclature :(i) [Co(NH3)4 (H2O)Cl]Cl2 (ii) [CrCl2(en)2]Cl, (en = ethane – 1, 2 – diamine) -Chemistry

Description : Name the following coordination compounds according to IUPAC system of nomenclature :(i) [Co(NH3)4 (H2O)Cl]Cl2 (ii) [CrCl2(en)2]Cl, (en = ethane – 1, 2 – diamine) -Chemistry

Last Answer : (i) [CO(NH3)4 (H2O)Cl]Cl2 Tetraammine aquachlorido cobalt (III) chloride (ii) [CrCl2(en)2]Cl Dichlorobis (ethane-1, 2-diamine) chromium (III) chloride

What are amphoteric oxides? Choose the amphoteric oxides from amongst the following oxides: Na2O, ZnO, Al2O3, CO2, H2O -Chemistry

Description : What are amphoteric oxides? Choose the amphoteric oxides from amongst the following oxides: Na2O, ZnO, Al2O3, CO2, H2O -Chemistry

Last Answer : Those oxides which reacts with acids as well as bases to produce salts and water are called amphoteric oxides, e.g. Na2O, ZnO, are amphoteric oxides among given oxides.

NaOH + HCl = What is the reaction of NaCl + H2O ?

Description : NaOH + HCl = What is the reaction of NaCl + H2O ?

Last Answer : mitigation reaction.

Water gas is the combination of – (1) CO and H2 (2) CO2 and H2 (3) CO and H2O (4) CO2 and CO

Description : Water gas is the combination of – (1) CO and H2 (2) CO2 and H2 (3) CO and H2O (4) CO2 and CO

Last Answer : (1) CO and H2 Explanation: Water has is a synthesis gas, containing carbon monoxide (CO) and hydrogen has (H2). It is made by passing steam over a redhot carbon fuel such as coke. The reaction between steam and hydrocarbons produce the has mixture.

Mark the compound which possesses ionic, covalent and coordinate bonds. (1) NH4C1 (2) SO3 (3) SO2 (4) H2O

Description : Mark the compound which possesses ionic, covalent and coordinate bonds. (1) NH4C1 (2) SO3 (3) SO2 (4) H2O

Last Answer : (1) NH4C1 Explanation: Ammonium chloride (NH4Cl) is generally considered as an ionic compound but this compound has three different types of bond.

Chemical composition of heavy water is – (1) H2O2 (2) H2O (3) HDO (4) D2O

Description : Chemical composition of heavy water is – (1) H2O2 (2) H2O (3) HDO (4) D2O

Last Answer : (4) D2O Explanation: The chemical composition of Heavy water (deuterium oxide) is 2H2O or D2O.

Substance used as an anti-freeze in radiators of automobiles is : (1) Methyl alcohol and H2O (2) Methy] alcohol (3) Ethyl alcohol (4) Ethyl alcohol and H2O

Description : Substance used as an anti-freeze in radiators of automobiles is : (1) Methyl alcohol and H2O (2) Methy] alcohol (3) Ethyl alcohol (4) Ethyl alcohol and H2O

Last Answer : (1) Methyl alcohol and H2O Explanation: Methyl alcohol and water are used as an anti-freeze in radiators of automobiles.

Why are Be & Mg inert to O2& H2O?

Description : Why are Be & Mg inert to O2& H2O?

Last Answer : Ans Beryllium and magnesium are chemically inert to oxygen and water because of the formation of an oxide film on their surface. However, powdered beryllium burns brilliantly on ignition in air to ... and nitride. They also react with water with increasing vigour even in cold to form hydroxides.

Explain the following (a) The density of ice is less than that of liquid water? (b) The boiling point of water is less than that of H2S. (c) NaH has higher reducing character than H2O.

Description : Explain the following (a) The density of ice is less than that of liquid water? (b) The boiling point of water is less than that of H2S. (c) NaH has higher reducing character than H2O.

Last Answer : Ans-a) In structure of ice , Oxygen atom is tetrahedrally surrouneded by four hydrogen (with two hydrogen by hydrogen bond and with two hydrogen by covalent bond ) and have vacant spaces in ... Due to extensive hydrogen bonding in water c)NaH is ionic compound while water is a covalent compound

Name the classes of hydride to which H2O, B2H6, and NaH belong

Description : Name the classes of hydride to which H2O, B2H6, and NaH belong

Last Answer : Ans: H2O(Covalent, electron rich) , B2H6 (Covalent Hydride, electron deficient),NaH( ionic hydride)

Name the classes of Hydrides to which H2O, B2H6 & NaH belong

Description : Name the classes of Hydrides to which H2O, B2H6 & NaH belong

Last Answer : Ans. H2O—Covalent B2H6- Covalent NaH- Ionic

Which type of intermolecular forces exists among the following molecules? (a) H2S molecules (b) H2O (c) Cl2 and CCl4 (d) SiH4 (e) Helium (f) He atoms and HCl molecules

Description : Which type of intermolecular forces exists among the following molecules? (a) H2S molecules (b) H2O (c) Cl2 and CCl4 (d) SiH4 (e) Helium (f) He atoms and HCl molecules

Last Answer : Ans. (a) Dipole-Dipole interactions. (b)H-Bond. (c)Dispersion forces. (d)Dispersion forces. (e)Dispersion forces. (f)Induced dipole-dipole interactions.

Why does H2O molecule have bent geometry Bent geometry?

Description : Why does H2O molecule have bent geometry Bent geometry?

Last Answer : Ans. Due to repulsion b/n two lone paires of e- present around central atom O

Give reasons i) H2O is a liquid but H2S a gas. ii) Ammonia has higher boiling point than phosphine ii) Krypton & xenon make compounds.

Description : Give reasons i) H2O is a liquid but H2S a gas. ii) Ammonia has higher boiling point than phosphine ii) Krypton & xenon make compounds.

Last Answer : Ans: i) Hydrogen bond is found in H2O but not in H2S.  ii) Hydrogen bond is found in NH3 but not in PH3.  iii) Because they have low ionization energy.

Out of (a) HNO3 + H2O and (b) C6H6 + C6H5CH3 which will form max. boiling azeotrope ?

Description : Out of (a) HNO3 + H2O and (b) C6H6 + C6H5CH3 which will form max. boiling azeotrope ?

Last Answer : (a) HNO3 + H2O.