Which of the following elements produce H2 gas with sodium hydroxide?
(A) Zn (B) Al and Pb (C) Si and Sn (D) All of these. The Correct Answer is (D) All... View Article
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Given: (1) Cu2+ + 2e- → Cu, E° = 0.337 V(2) Cu2+ + e- → Cu+, E° = 0.153 V. What will be the Electrode potential E for the reaction: Cu+ + e- → Cu
(A) 0.30 V (B) 0.38 V (C) 0.52 V (D) 0.90 V The Correct Answer is (C) 0.52 V Solution:... View Article
Which of the following statements is true about the Tyndall effect?
(A) It is observed only when the size of the particles is generally between 10−11 and 10−9 m in diameter.... View Article
What is the oxidation state of C in the product obtained during the following reaction?
\(\begin{array}{l}ZnO + C \rightarrow Zn + CO\end{array} \) (A) 0 to 2 (B) 0 to +2 (C) 0 to -2... View Article
Which of the following will have a metal deficiency defect?
(A) FeO (B) ZnO (C) KCl (D) NaCl The Correct Answer is (A) FeO. Solution: In metal deficiency defects, a... View Article
Which of the following has the maximum percentage of carbon in it?
(A) Pig iron (B) Cast iron (C) Hard steel (D) Wrought iron The Correct Answer is (B) Cast iron. Solution: Cast... View Article
Which set of quantum numbers is possible for the last electron of Mg+ ion?
(A) n = 1, l = 0, m = 0, s = +1/2 (B) n = 2, l = 3,... View Article
Balance the following chemical equation by oxidation number method.
\(\begin{array}{l}KI + H_{2}SO_{4} \rightarrow K_{2}SO_{4} + I_{2} + SO_{2} + H_{2}O\end{array} \) Solution: The balanced chemical equation by oxidation number... View Article
Among the molecules SO2, SF4, ClF3,BrF5 and XeF4. Which of the following shapes does not describe any of these molecules?
(A) V shape (B) Bent shape (C) square pyramidal (D) Trigonal bipyramidal The Correct Answer is (B) Bent shape Solution:... View Article
Which of the following orbital overlapping will form Pi bond?
The Correct Answer is (C) Solution: Lateral overlapping of orbitals will form pi bonds. s orbital will always overlap axially... View Article
Assertion:Decomposition of vegetable matter into compost is an endothermic reaction. Reason: Decomposition reaction involves breakdown of a single reactant into simpler products.
(A) Both Assertion and Reason are false. (B) Assertion is false, but Reason is true. (C) Both Assertion and Reason... View Article
The molecular weight of oxide of an element is 44. The equivalent weight of the element is 14. The atomic weight of the element is____.
(A) 7 (B) 14 (C) 28 (D) 56 The Correct Answer is (B) 14 Solution: Let the molecular formula of... View Article
Which of the following compounds reacts with NaNO2 and HCl at -4°C to yield alcohol (OR) phenol?
(A) C2H5NH2 (B) C6H5NH2 (C) CH3NHCH3 (D) C6H5NHCH3 The Correct Answer is (A) C2H5NH2 Solution: C2H5NH2 is an aliphatic primary... View Article
In the titration of CH3COOH against NaOH, which of the following indicator acts as a suitable indicator for this titration?
(A) Methyl red (B) Methyl orange (C) Phenolphthalein (D) Bromothymol blue The Correct Answer is (C) Phenolphthalein Solution: In the... View Article
Which of the following is the most polar compound?
(A) NH3 (B) BiH3 (C) AsH3 (D) SbH3 The Correct Answer is (A) NH3 Solution: Among the given compounds, Ammonia... View Article
What is the coordination number of bcc and fcc crystal structure.
(A) 8 and 8 (B) 8 and 10 (C) 8 and 12 (D) 12 and 12 The Correct Answer is... View Article
The maximum degenerate orbitals in the 3rd shell of Li2+ is
(A) 1 (B) 5 (C) 7 (D) 9 The Correct Answer is (D) 9 Solution: Li2+ contains nine degenerate atomic... View Article
How many isomers are possible in C4H8?
(A) 3 (B) 5 (C) 7 (D) 9 The Correct Answer is (B) 5 Solution: Five constitutional isomers are possible... View Article
Thin layer chromatography is______.
(A) Partition chromatography (B) Adsorption chromatography (C) Electrical mobility of ionic species (D) None of the above The Correct Answer... View Article
The force acting on the electron in a hydrogen atom depends on the principal quantum number as
(A) \(\begin{array}{l}F is \propto n^{2}\end{array} \) (B) \(\begin{array}{l}F is \propto n^{4}\end{array} \) (C) \(\begin{array}{l}F is \propto \frac{1}{n^{2}}\end{array} \) (D) \(\begin{array}{l}F... View Article
