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