Chemistry Class 10th
381. The person who discovered the ratio of the elements of water was:
A) Henry Cavendish
B) Joseph Proust
C) Alex Thomas
D) James Green
382. Water has high:
A) Specific Heat
B) Latent Heat
C) Both A and B
D) None of the above
383. Water is a _____ liquid:
A) colorless
B) tasteless
C) odorless
D) all of the above
384. Water exists in ______ states.
A) One
B) Two
C) Three
D) None
385. Pure water is neutral to litmus.
A) True
B) False
386. Pure water does not conduct electricity:
A) True
B) False
387. Water is a Non Polar Liquid:
A) True
B) False
388. Water has low surface tension:
A) True
B) False
389. Water is a thermally stable compound:
A) True
B) False
390. Reaction of Ca with Water produces:
A) Calcium Hydroxide
B) Hydrogen Gas
C) Both A and B
D) None of the above
391. _______ is most commonly used as a disinfectant.
A) Hydrogen
B) Chlorine
C) Bleach
D) All of the above
392. ______ is type of water that produces good lather and does not scum with Soap.
A) Soft Water
B) Hard Water
C) Both A and B
D) None of the above
393. _______ is type of water that does not produce lather and scum with Soap.
A) Soft Water
B) Hard Water
C) Both A and B
D) None of the above
394. There are _______ types of hardness of water:
A) One
B) Two
C) Three
D) Four
395. Temporary hardness is due to:
A)Calcium Bicarbonate
B) Magnesium Bicarbonate
C) Salts
D) Calcium Bicarbonate and Magnesium Bicarbonate
396. Permanent Hardness is due to:
A)Calcium Bicarbonate
B) Magnesium Bicarbonate
C) Salts
D) Calcium Bicarbonate and Magnesium Bicarbonate
397. Boiling method can be used to remove _______ hardness.
A) Temporary
B) Permanent
C) Both A and B
D) None of the above
398. Clark Method is used to remove ________ hardness.
A) Temporary
B) Permanent
C) Both A and B
D) None of the above
399. Washing powder is used to remove _______ hardness.
A) Temporary
B) Permanent
C) Both A and B
D) None of the above
400. Ion Exchange Method is used for removal of ________ hardness:
A) Temporary
B) Permanent
C) Both A and B
D) None of the above