Chemistry MCQs quiz

Chemistry MCQs - Quiz with Answers

1. Name a transition element which does not exhibit variable oxidation states?

(A) Zinc (B) Copper (C) Scandium (D) Chromium

Answer: (A) Zinc

2. From which of the following reaction primary amine is produced?

(A) Reduction of Nitrile Compounds (B) Reduction of Amide Compounds (C) Hoffmann bromamide degradation reaction (D) Above all reactions

Answer: (D) Above all reactions

3. If atomic number of element is 26, then magnetic moment is divalent aqueous ion? BM of its

(A) 1.73 (B) 3.87 (C) 2.83 (D) 4.90

Answer: (D) 4.90

4. Hinsberg's reagent do not react with which amine?

(A) Only 1°-amine (B) Only 3º-amine (C) Only 2º-amine (D) 1° and 2º - amine

Answer: (B) Only 3º-amine

5. In the presence of a catalyst, the heat evolved or absorbed during the reaction........

(A) Increases (B) Decreases (C) May decrease or increases (D) Remains unchanged

Answer: (D) Remains unchanged

6. The divalent ion of which of the following element in aqueous solution has magnetic moment 5.92 BM?

(A) Cr (B) Co (C) Fe (D) Mn

Answer: (D) Mn

7. Which isomerism is possible in hexa ammine cobalt (III) hexacyanido chromate (III) complex?

(A) Co-ordination isomerism (B) Linkage isomerism (C) Ionistion isomerism (D) Solvate isomerism

Answer: (A) Co-ordination isomerism

8. Which of the following has highest boiling point?

(A) Ethoxy ethane (B) n-Butane (C) Pentanal (D) Penthane-1-ol

Answer: (D) Penthane-1-ol

9. Which amino acids are used in the preparation of Nylon-2-Nylon-6?

(A) Phenol and Formaldehyde (B) Phthalic acid and glycine (C) Amino Caproic acid and glycine (D) Ethylene glycol and Phthalic acid

Answer: (C) Amino Caproic acid and glycine

10. One electrolysis of aqueous solution of a halide of a metal 'M' by passing 1.5 ampere current for 10 minutes deposits 0.2938 g of metal. If the atomic mass of the metal is 63 gm/mole, then what will be the formula of the metal halide?

(A) MCl3 (B) MCl2 (C) MCl (D) MCl

Answer: (B) MCl2