Q. In the Clark method, the calculated amount is added to hard water of:
The correct answer was: Lime soda
Q. ___ is:

The correct answer was: Catechol
Q. Which of the following is a physical change?
The correct answer was: Bending of iron rod
Q. Aldehydes without an α-hydrogen atom undergo self-oxidation and reduction reaction when heated with:
The correct answer was: Aqueous NaOH
Q. Acetylation of salicylic acid produces:
The correct answer was: Aspirin
Q. The ratio of oxygen to hydrogen in water is:
The correct answer was: 4:1
Q. The correct electronic configuration of sodium is:
The correct answer was: 2, 8, 1
Q. Plaster of Paris is:
The correct answer was: CaSO₄.½H₂O
Q. Who proposed the first model of the atom?
The correct answer was: Rutherford
Q. Used in Gabriel synthesis preparation:
The correct answer was: Primary amine
Q. The hybridization in a C₂H₂ molecule is:
The correct answer was: sp
Q. The mole ratio of 12 grams of magnesium to 16 grams of sulfur atoms is:
The correct answer was: 1:1
Q. Which of the following is not inconsistent:
The correct answer was: ClO₂⁻
Q. Which of these has the maximum number of atoms?
The correct answer was: 18 grams O₂
Q. An atom is:
The correct answer was: Neutral
Q. The law of conservation of mass was given by:
The correct answer was: Lavoisier
Q. The pKₐ of acetic acid and ammonium hydroxide are 4.76 and 4.75 respectively. The pH of an ammonium acetate solution is:
The correct answer was: 7.005
Q. Which of these shows the solubility of sugar at 25°C?
The correct answer was: 37 grams
Q. Who discovered the electron?
The correct answer was: J.J. Thomson
Q. The conjugate base of HCO₃⁻ is:
The correct answer was: CO₂
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