Which of the following have same number of significant figures?
(A) 0.00253
(B) 1.0003
(C) 15.0
(D) 163
Choose the correct answer from the options given below
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Which of the following have same number of significant figures?
(A) 0.00253
(B) 1.0003
(C) 15.0
(D) 163
Choose the correct answer from the options given below
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Henry Moseley studied characteristic X-ray spectra of elements. The graph which represents his observation correctly is
Given $$\nu$$ = Frequency of X-ray emitted, $$Z$$ = Atomic number
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The number of atomic orbitals from the following having 5 radial nodes is
7s, 7p, 6s, 8p, 8d
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The number of species from the following carrying a single lone pair on central atom Xenon is
$$XeF_5^+$$, $$XeO_3$$, $$XeO_2F_2$$, $$XeF_5^-$$, $$XeO_3F_2$$, $$XeOF_4$$, $$XeF_4$$
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Arrange the following gases in increasing order of van der Waals constant 'a'
(A) Ar
(B) CH$$_4$$
(C) H$$_2$$O
(D) C$$_6$$H$$_6$$
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The incorrect statements from the following is:
A. The electrical work that a reaction can perform at constant pressure and temperature is equal to the reaction Gibbs energy.
B. $$E^\circ_{cell}$$ is dependent on the pressure.
C. $$\frac{dE_{cell}}{dT} = \frac{\Delta_r S}{nF}$$
D. A cell is operating reversibly if the cell potential is exactly balanced by an opposing source of potential difference.
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Given below are two statements:
Statement-I: Methyl orange is a weak acid.
Statement-II: The benzenoid form of methyl orange is more intense/deeply coloured than the quinonoid form.
In the light of the above statement, choose the most appropriate answer from the options given below:
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Given below are two statements:
Statement I: In redox titration, the indicators used are sensitive to change in pH of the solution.
Statement II: In acid-base titration, the indicators used are sensitive to change in oxidation potential.
In the light of the above statements, choose the most appropriate answer from the options given below
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Which of the following can reduce decomposition of H$$_2$$O$$_2$$ on exposure to light
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For a good quality cement, the ratio of lime to the total of the oxides of Si, Al and Fe should be as close as to
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Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Sodium is about 30 times as abundant as potassium in the oceans.
Reason R: Potassium is bigger in size than sodium.
In the light of the above statements, choose the correct answer from the options given below
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The descending order of acidity for the following carboxylic acid is-
(A) CH$$_3$$COOH
(B) F$$_3$$C-COOH
(C) ClCH$$_2$$-COOH
(D) FCH$$_2$$-COOH
(E) BrCH$$_2$$-COOH
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The correct IUPAC nomenclature for the following compound is:
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Which of these reactions is not a part of breakdown of ozone in stratosphere?
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The correct reaction profile diagram for a positive catalyst reaction.
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The statement/s which are true about antagonists from the following is/are:
A. They bind to the receptor site.
B. Get transferred inside the cell for their action.
C. Inhibit the natural communication of the body.
D. Mimic the natural messenger.
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In Hall-Heroult process, the following is used for reducing Al$$_2$$O$$_3$$:-
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Match List-I with List-II
| LIST-I Coordination Complex | LIST-II Number of unpaired electrons | ||
|---|---|---|---|
| A. | $$[Cr(CN)_6]^{3-}$$ | I. | 0 |
| B. | $$[Fe(H_2O)_6]^{2+}$$ | II. | 3 |
| C. | $$[Co(NH_3)_6]^{3+}$$ | III. | 2 |
| D. | $$[Ni(NH_3)_6]^{2+}$$ | IV. | 4 |
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The correct order of reactivity of following haloarenes towards nucleophilic substitution with aqueous NaOH is:
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A compound 'X' when treated with phthalic anhydride in presence of concentrated H$$_2$$SO$$_4$$ yields 'Y'. 'Y' is used as an acid/base indicator. 'X' and 'Y' are respectively
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For complete combustion of ethene,
$$C_2H_4(g) + 3O_2(g) \to 2CO_2(g) + 2H_2O(l)$$
the amount of heat produced as measured in bomb calorimeter is 1406 kJ mol$$^{-1}$$ at 300 K. The minimum value of T$$\Delta$$S needed to reach equilibrium is ($$-$$) kJ. (Nearest integer)
Given: R = 8.3 J K$$^{-1}$$ mol$$^{-1}$$
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The solubility product of BaSO$$_4$$ is $$1 \times 10^{-10}$$ at 298 K. The solubility of BaSO$$_4$$ in 0.1 M K$$_2$$SO$$_4$$(aq) solution is _______ $$\times 10^{-9}$$ g L$$^{-1}$$ (nearest integer).
Given: Molar mass of BaSO$$_4$$ is 233 g mol$$^{-1}$$
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If the boiling points of two solvents X and Y (having same molecular weights) are in the ratio 2:1 and their enthalpy of vaporizations are in the ratio 1:2, then the boiling point elevation constant of X is m times the boiling point elevation constant of Y. The value of m is (nearest integer).
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Coagulating value of the electrolytes AlCl$$_3$$ and NaCl for As$$_2$$S$$_3$$ are 0.09 and 50.04 respectively. The coagulating power of AlCl$$_3$$ is x times the coagulating power of NaCl. The value of x is _____.
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The ratio of sigma and $$\pi$$ bonds present in pyrophosphoric acid is _____.
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The observed magnetic moment of the complex $$[Mn(NCS)_6]^{x-}$$ is 6.06 BM. The numerical value of x is _____.
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The sum of oxidation state of the metals in Fe(CO)$$_5$$, VO$$^{2+}$$ and WO$$_3$$ is _____.
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Major product 'P' formed in the following reaction is:
The product (P) formed from the following multistep reaction is:
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Match List I with List II
| List I Natural amino acid | List II One Letter Code | ||
|---|---|---|---|
| (A) | Glutamic acid | (I) | Q |
| (B) | Glutamine | (II) | W |
| (C) | Tyrosine | (III) | E |
| (D) | Tryptophan | (IV) | Y |
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