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5051.

Identify the reducing agent in the following reactions. (a) 4NH_(3)+5O_(2)rarr4NO+6H_(2)O (b) H_(2)O+F_(2)rarrHF+HOF (c ) Fe_(2)O_(3)+3COrarr2Fe+3CO_(2) (d) 2H_(2)+O_(2)rarr2H_(2)O

Answer»

Solution :(a) AMMONIA `(NH_(3))`
(b) Water `(H_(2)O)` as `F_(2)` is getting REDUCED to HF
(C ) Carbon monoxide (CO)
(d) Hydrogen `(H_(2))`
Discussion
5052.

Identify the reducing agent in the following reaction : H_(2)O + F_(2) to HF + HOF

Answer»

SOLUTION :`H_(2)O` is the REDUCING AGENT, because `F_2`is being reduced to HF.
Discussion
5053.

Identify the reducing agent in the following reactions.

Answer»

SOLUTION :
Discussion
5054.

Identify the reducing agent and oxidizing agent in the following reactions : V_(2)O_(5)+5Ca to 2V +5CaO

Answer»

Solution :REDUCING agent - `CA` and OXIDIZING agent - `V_(2)O_(5)`
Discussion
5055.

Identify the reducing agent and oxidizing agent in the following reactions : H_(2)O+F_(2) to HF+HOF

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SOLUTION :Reducing AGENT - `F_(2)` and OXIDIZING agent - `H_(2)O`.
Discussion
5056.

Identify the reducing agent and oxidizing agent in the following reactions : Pb_(3)O_(4)+8HCl to 3PbCl_(2)+Cl_(2)+4H_(2)O

Answer»

Solution :REDUCING agent - `HCl` and OXIDIZING agent - `Pb_(3)O_(4)`.
Discussion
5057.

Identify the reducing agent and oxidizing agent in the following reactions : CuO+H_(2) toCu+H_(2)O

Answer»

Solution :REDUCING AGENT - `H_(2)` and oxidizing agent - `CUO`.
Discussion
5058.

Identify the reducing agent and oxidizing agent in the following reactions : 2H_(2)+O_(2) to 2H_(2)O

Answer»

SOLUTION :REDUCING AGENT - `H_(2)` and oxidizing agent - `O_(2)`.
Discussion
5059.

Identify the productformedwhen ethanol reacts with sodium .

Answer»

SODIUM ACETATE
Sodium ethanate
Sodium ETHOXIDE
Sodium formate .

ANSWER :C
Discussion
5060.

Identify the pair that indicates isobars among the following.

Answer»

`""_(1)H^(2),""_(1)H^(3)`
`""_(17)Cl^(35),""_(17)Cl^(37)`
`""_(18)Ar^(40),""_(18)CA^(40)`
`""_(6)C^(13),""_(7)N^(14)`

Solution :`""_(18)Ar^(40),""_(18)Ca^(40)`
Discussion
5061.

Identify the oxidizing and reducing agent in the following reactions. CuSO_(4)+Zn to ZnSO_(4)+Cu

Answer»

SOLUTION :COPPER SULPHATE
Discussion
5062.

Identify the oxidizing and reducing agent in the following reactions. Pb_(3)O_(4)+8HCl to 3PbCl_(2)+Cl_(2)+4H_(2)O

Answer»

Solution :lead OXIDE are the OXIDIZING agents and (i) ZN and (ii) HCl are the REDUCING agents.
Discussion
5063.

Identify the oxidising agents (oxidants ) in the following reactions: (i) Pb_(3)O_(4)+8HClrarr3PbCl_(2)+Cl_(2)+4H_(2)O (ii) CuSO_(4)+ZnrarrCu+ZnSO_(4)

Answer»

SOLUTION :(i) `Pb_(3)O_(4)` =Oxidising AGENT
(ii) `CuSO_(4)`=Oxidising agent
Discussion
5064.

Identify the oxidising agent (oxident) in the following reactions. (i) Pb_(3)O_(4)+8HClrarr3PbCl_(2)+Cl_(2)+4H_(2)O (ii) 2Mg+O_(2)rarr2MgO (iii) CuSO_(4)+ZnrarrCu+ZnSO_(4) (iv) V_(2)O_(5)+5Cararr2V+5CaO (v) 3Fe+4H_(2)OrarrFe_(3)O_(4)+4H_(2) (vi) CuO+H_(2)rarrCu+H_(2)O

Answer»

SOLUTION :(i) `Pb_(3)O_(4)` (ii) `O_(2)` (iii) `CuSO_(4)`
(IV) `V_(2)O_(5)` (v) `H_(2)O` (vi) `CuO`
Discussion
5065.

Identify the oxidising agent in the following reactions.

Answer»

SOLUTION :
Discussion
5066.

Identify the reducing agent in the following reaction : Fe_(2)O_(3)+3COrarr2Fe+3CO_(2)

Answer»

Solution :Oxidising agent `=Fe_(2)O_(3)`
REDUCING agent =CO
`Fe_(2)O_(3)` is REDUCE to Fe (loss of oxygen)
Co is oxidised ............... Oxygen
O.A. `F_(2)` FLUORINE is reduced.
O.A=CUO, R.A`=H_(2)`
CuO is reduced, `H_(2)` is oxidised
O.A `=H_(2)`O, R.A.=Fe
Fe is oxidised, `H_(2)O` is reduced
Discussion
5067.

Identify the non aqueous solution.

Answer»

sodium chloride in WATER
glucose in water
COPPER sulphate in water
SULPHUR in carbon-di-sulphide

SOLUTION :sulphur in carbon-di-sulphide
Discussion
5068.

Identify the nature of above compound and explain three physical properties of such compound.

Answer»

Solution :It is ionic COMPOUND.
PHYSICAL properties.
1. It is hard and solid.
2. It has high melting and boilign point.
3. It SOLUBLE in water.
Discussion
5069.

Identify the most reactive and the least reactive metal amongst the following: AI, K, Cu, Au.

Answer»

SOLUTION :POTASSIUM (K) is the most REACTIVE.Gold (Au) is the LEAST reactive.
Discussion
5070.

Identify the most reactive and least reactive metals from the reaction below: CuSO_4 + Fe to FeSO_4 + CuFeSO_4 + Zn to ZnSO_4 + Fe

Answer»

SOLUTION :ZINC is most REACTIVE and COPPER is LEAST reactive.
Discussion
5071.

Identify the molecule having sideways overlapping of atomic orbitals

Answer»

`CH_(4)`
`CO_(2)`
`NH_(3)`
`H_(2)O`

Answer :B
Discussion
5072.

Identify the metal that reacts with concetrated H_(2)SO_(4)orHNO_(3), but not with concentrated HCl.

Answer»

Fe
Zn
Cu
Al

Solution :Copper being less active metal, does not react with HCl. But `H_(2)SO_(4)andHNO_(3)` being STRONG oxidizing AGENTS oxideze copper, releasing `SO_(2)` GAS or `NO_(2)` gas.
Discussion
5073.

Identifythe 'heteronucleartriatomicmolecules ' amongthefollowing.

Answer»

<P>`P_(4)`
`H_(2) SO_(4)`
`CO_(2)`
`O_(3)`

ANSWER :D
Discussion
5074.

Identify the functional groups in butanone and butanal respectively.

Answer»

SOLUTION :KETONE, ALDEHYDE
Discussion
5075.

Identify the functional group present in the following compound and name it according to IUPAC system.

Answer»

Solution :`CH_(3)OH`
Functional GROUP : -OH (HYDROXY)
IUPAC name : Methanol.
Discussion
5076.

Identify the functional group in pentanone

Answer»

SOLUTION :KETONE.
Discussion
5077.

Identify the following reactions as either oxidation or reduction : O + 2e to O^(2-)

Answer»

SOLUTION :REDUCTION
Discussion
5078.

Identify the following reactions as either oxidation or reduction : Fe^(3+) +e^(-) to Fe^(2+)

Answer»

SOLUTION :REDUCTION
Discussion
5079.

Identify the following reactions as either oxidation or reduction : K - e^(-) to K^(+)

Answer»

SOLUTION :OXIDATION
Discussion
5080.

Identify the false statement among the following

Answer»

Oxidation TAKES place at positive ELECTRODE in electrolytic CELL, whereas reduction at negative electrode in voltaic cell
Deposition of metals takes place in both electrolytic and galvanic cells
Direction of flow of CURRENT is from cathode to anode in electrolytic cells
Both a and b

Solution :In an electrolytic cell, the direction of flow of electrons is from cathode to anode and HENCE the flow of current is taken in opposite direction from anode to cathode.
Discussion
5081.

Identify the favourable conditions for the formation of ionic bond:

Answer»

low IP VALUE of metal, low EA value of non-metal
high IP value of metal, high EA value of non-metal
low IP value of metal, high EA valueof non-metal
high IP value of metal, low IP value of non-metal

Solution :Ionic bond FORMATION is favourable between METALS having low IP VALUES and non-metals having high EA values.
Discussion
5082.

Identify the elements with the following property and arrange them in increasing order of their reactivity.(a) An element which is a soft and reactive metal. (b) The metal which is an important constituent of limestone. (c) The metal which exists in liquid state at room temperature.

Answer»

SOLUTION :(a) Na or K(b) CA(c) Hg
Reactivity ORDER: Hg < Ca < Na < K
Discussion
5083.

Identify the elements to complete the table :

Answer»

SOLUTION :PERIOD (1), Group (1), ELEMENT (H), Period (2) Group (2) Element (Be), Period (3), Group (1) Element (NA)
Discussion
5084.

Identify the correct statement(s) in relation to the following reaction. Zn+2HCl to ZnCl_(2)+H_(2)

Answer»

Zinc is ACTING as an oxidant
Chlorine is acting as a REDUCTANT
Hydrogen is acting as a REDUCING agent
zinc is acting as a reductant

Solution :In the reaction, zinc has DISPLACED hydrogen fromHCl, hence zinc is acting as a reductant (reducing agent)
Discussion
5085.

Identify the correct statement among the following with respect to plant hormones.

Answer»

CYTOKININ promotes WILTING of leaves.
Auxin inhibits stem elongation
Abscisic acid inhibits growth of plants
Gibberillin promotes FALLING of leaves.

Answer :3
Discussion
5086.

Identify the correct sequence of steps in an experiment to show the effect of temperature on the rate of the reaction.(1) Measuring the volumesof H_(2) gas liberated in the two test tubes. (2) Heating the test tube B by 10^(@)C (3) Comparison of relative volumes of H_(2) liberated in test tubes B and A. (4) Addition of same concentration of HCl ot the two test tubes. (5) Taking equal masses of fine granules of zinc in two test tubes A and B.

Answer»

3,4,5,1,2
5,4,2,1,3
2,1,3,5,4
5,4,2,3,1

Solution :(i) raking equal masses of fine GRANULES of zinc in two test tubes A and B.
(ii) ADDITION of same concentration of HCl ot the two test tubes.
(iii) HEATING the test tube B by `10^(@)C`
(iv) measuring the volumes of `H_(2)` gas liberated in two test tubes.
(v) observation of volumes of `H_(2)` liberated in test tubes B and A.
Discussion
5087.

Identify the correct represents of reaction occurring during chloralkali process

Answer»

`2NaCl(L) + 2H_(2)O(l) RARR 2NAOH(l) + Cl_(2)(G) + H_(2)(g)`
`2NaCl(aq) + 2H_(2)O(aq) rarr 2NaOH(aq) + Cl_(2)(aq) + H_(2)(aq)`
`2NaCl(aq) + 2H_(2)O(l) rarr 2NaOH(aq) + Cl_(2)(aq) + H_(2)(aq)`
`2NaCl(aq) + 2H_(2)O(l) rarr 2NaOH(aq) + Cl_(2)(g) + H_(2)(g)`

SOLUTION :`2NaCl(aq) + 2H_(2)O(l) rarr 2NaOH(aq) + Cl_(2)(aq) + H_(2)(g)`
Discussion
5088.

Identify the correct representation of reaction occurring during chloralkali process

Answer»

`2NaCl (L)+2H_(2)O (l) rarr 2NaOH (l) + Cl_(2) (g) +H_(2)(g)`
`2NaCl(aq) +2H_(2)O(aq) rarr 2NaOH (aq) +Cl_(2)(g)+H_(2)(g)`
`2NaCl (aq) + 2H_(2)O (l) rarr 2NaOH(aq)+Cl_(2)(aq)+H_(2)(aq)`
`2NaCl(aq) +2H_(2)O(l) rarr 2NaOH (aq) +Cl_(2)(g)+H_(2)(g)`

SOLUTION :The CORRECT physical states of NaCl , `H_(2)O`, NAOH, `Cl_(2)` and `H_(2)` are (aq),(g) and (g) respectively.
Discussion
5089.

Identify the correct balanced chemical equation among the following :

Answer»

`ZN(s)+H_(2)SO_(4)(AQ.)toZnSO_(4)(l)+H_(2)(g)`
`Zn(s)+H_(2)SO_(4)(l)toZnSO_(4)(l)+H_(2)(g)`
`An(s)+H_(2)SO_(4)(l)toZnSO_(4)(aq.)+H_(2)(g)`
`Zn(s)+H_(2)SO_(4)(aq.)toZnSO_(4)(aq.)+H_(2)(g)`

ANSWER :D
Discussion
5090.

Identify the compounds using the clues given below. This is a dark colourd syrupy liquid containing30% of sucrose .

Answer»

SOLUTION :MOLASSES .
Discussion
5091.

Identify the compounds using the clues given below. Duringmanufacture of ethanol this is added as food for yeast .

Answer»

SOLUTION :AMMONIUM SULPHATE .
Discussion
5092.

Identify the compounds using the clues given below. This enzyme convertssucrose into glucoseand fructose .

Answer»

SOLUTION :INVERTASE .
Discussion
5093.

Identify the compounds using the clues given below. This compound contains 95.5% ethanol and 4.5%

Answer»

SOLUTION :RECTIFIED SPIRIT
Discussion
5094.

Identify the compounds A, B, C, D, E and F in the following reactions : D+Na_(2)CO_(3)toCH_(3)COONa+E+H_(2)O

Answer»

SOLUTION :`D=CH_(3)COOH,E=CO_(2)`
Discussion
5095.

Identify the compounds A, B, C, D, E and F in the following reactions : E+Ca(OH)_(2)to underset("precipitate")underset("White")(F)+H_(2)O

Answer»

SOLUTION :`E=CO_(2),F=CaCO_(3)`
Discussion
5096.

Identify the compounds A, B, C, D, E and F in the following reactions : CH_(3)CH_(2)OH overset(AtoCH_(3)COOH

Answer»

Solution :A = ALKALINE `KMnO_(4)` or ACIDIC `K_(2)Cr_(2)O_(7)`
Discussion
5097.

Identify the compounds A, B, C, D, E and F in the following reactions : CH_(3)CH_(2)OH+CH_(3)COOH overset("Acid")toB+H_(2)O

Answer»

SOLUTION :`B=CH_(3)COOC_(2)H_(5)`
Discussion
5098.

Identify the compounds A, B, C, D, E and F in the following reactions : B+NaOH toC_(2)H_(5)OH+C

Answer»

Solution :`C=CH_(3)COONA,B=CH_(3)COOC_(2)H_(5)`
Discussion
5099.

Identify the compound X on the basis of the reactions given below. Also write the name and chemical formulae of A, B and C.

Answer»

Solution :The compound X is sodium hydroxide (NaOH)
Compound A = Sodium zincate, `Na_2ZnO_2`
Compound B = Sodium CHLORIDE NACL
Compound C = Sodium ACETATE, `CH_3COONa`
Discussion
5100.

Identify the compound which is used as disinfectant.

Answer»

`FeSO_4. 7H_2O`
`CaSO_4. 2H_2O`
`CuSO_4. 5H_2O`
`CA(OH)_2`

SOLUTION :`CuSO_4,5H_2O`
Discussion