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Production of iron in blast furnace follows the following equation
Fe$$_3$$O$$_4$$(s) + 4CO(g) $$\rightarrow$$ 3Fe(l) + 4CO$$_2$$(g)
when 4.640 kg of Fe$$_3$$O$$_4$$ and 2.520 kg of CO are allowed to react then the amount of iron (in g) produced is:
[Given: Molar Atomic mass (g mol$$^{-1}$$): Fe = 56, O = 16, C = 12]
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Which of the following statements are correct?
(A) The electronic configuration of Cr is [Ar] 3d$$^5$$4s$$^1$$.
(B) The magnetic quantum number may have a negative value.
(C) In the ground state of an atom, the orbitals are filled in order of their increasing energy order.
(D) The total number of nodes are given by n - 2.
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The electronic configuration of Pt (atomic number 78) is
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Arrange the following in the decreasing order of their covalent character:
(A) LiCl
(B) NaCl
(C) KCl
(D) CsCl
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The solubility of AgCl will be maximum in which of the following?
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Which one of the following reactions indicates the reducing ability of hydrogen peroxide in basic medium?
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Match List-I with Match List-II
List-I (Metal) List-II (Emitted light wavelength (nm))
(A) Li (I) 670.8
(B) Na (II) 589.2
(C) Rb (III) 780.0
(D) Cs (V) 455.5
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Match List-I with Match List-II
List-I (Metal) List-II (Application)
(A) Cs (I) High temperature thermometer
(B) Ga (II) Water repellent sprays
(C) B (III) Photoelectric cells
(D) Si (V) Bullet proof vest
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Two isomers 'A' and 'B' with molecular formula C$$_4$$H$$_8$$ give different products on oxidation with KMnO$$_4$$ in acidic medium. Isomer 'A' on reaction with KMnO$$_4$$/H$$^+$$ results in effervescence of a gas and gives ketone. The compound 'A' is
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The acid that is believed to be mainly responsible for the damage of Taj Mahal is
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Which of the following is a correct statement?
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In isolation of which one of the following metals from their ores, the use of cyanide salt is commonly not involved?
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The oxoacid of phosphorus that is easily obtained from a reaction of alkali and white phosphorus and has two P - H bonds, is
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In the given conversion the compound A is:
Given below are two statements.
Statement I: Phenols are weakly acidic.
Statement II: Therefore they are freely soluble in NaOH solution and are weaker acids than alcohols and water.
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Given below are two statements:
Statement I: The esterification of carboxylic acid with an alcohol is a nucleophilic acyl substitution.
Statement II: Electron withdrawing groups in the carboxylic acid will increase the rate of esterification reaction.
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Consider the above reaction. The product A and product B respectively are
Consider the above reaction, the product and product respectively are
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The polymer, which can be stretched and retains its original status on releasing the force is
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Which of the following compound does not contain sulphur atom?
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Sugar moiety in DNA and RNA molecules respectively are
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Geraniol, a volatile organic compound, is a component of rose oil. The density of the vapour is 0.46 gL$$^{-1}$$ at 257°C and 100 mmHg. The molar mass of geraniol is ______ (Nearest Integer)
[Given R = 0.082 L atm K$$^{-1}$$ mol$$^{-1}$$]
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17.0 g of NH$$_3$$ completely vapourises at $$-33.42$$°C and 1 bar pressure and the enthalpy change in the process is 23.4 kJ mol$$^{-1}$$. The enthalpy change for the vapourisation of 85 g of NH$$_3$$ under the same conditions is ______ kJ.
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Kjeldahl's method was used for the estimation of nitrogen in an organic compound. The ammonia evolved from 0.55 g of the compound neutralised 12.5 mL of 1M H$$_2$$SO$$_4$$ solution. The percentage of nitrogen in the compound is ______ (Nearest Integer)
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Observe structures of the following compounds
The total number of structures/compounds which possess asymmetric carbon atoms is
1.2 mL of acetic acid is dissolved in water to make 2.0 L of solution. The depression in freezing point observed for this strength of acid is 0.0198°C. The percentage of dissociation of the acid is ______ (Nearest integer)
[Given: Density of acetic acid is 1.02 g mL$$^{-1}$$ Molar mass of acetic acid is 60 g mol$$^{-1}$$, K$$_f$$(H$$_2$$O) = 1.85 K kg mol$$^{-1}$$]
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A dilute solution of sulphuric acid is electrolysed using a current of 0.10 A for 2 hours to produce hydrogen and oxygen gas. The total volume of gases produced at STP is ______ cm$$^3$$. (Nearest integer) [Given: Faraday constant F = 96500 C mol$$^{-1}$$ at STP, molar volume of an ideal gas is 22.7 L mol$$^{-1}$$]
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The activation energy of one of the reactions in a biochemical process is 532611 J mol$$^{-1}$$. When the temperature falls from 310 K to 300 K, the change in rate constant observed is k$$_{300}$$ = x $$\times$$ 10$$^{-3}$$k$$_{310}$$. The value of x is ______.
[Given: ln 10 = 2.3 R = 8.3 J K$$^{-1}$$ mol$$^{-1}$$]
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The number of terminal oxygen atoms present in the product B obtained from the following reaction is ______.
FeCr$$_2$$O$$_4$$ + Na$$_2$$CO$$_3$$ + O$$_2$$ $$\rightarrow$$ A + Fe$$_2$$O$$_3$$ + CO$$_2$$
A + H$$^+$$ $$\rightarrow$$ B + H$$_2$$O + Na$$^+$$
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An acidified manganate solution undergoes disproportionation reaction. The spin-only magnetic moment value of the product having manganese in higher oxidation state is ______ B.M. (Nearest integer)
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The number of carbon atoms present in the product B is
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