Which of the following option is correct about the uses of Hydrochloric acid? It is used in making plastics like polyvinyl chloride (PVC). It is used for cleaning iron sheets before tin-plating or galvanization.

Reaction between which of the following will NOT lead to the evolution of Hydrogen gas? (A) Magnesium with dilute hydrochloric acid (B) Copper with dilute hydrochloric acid (C) Sulphur powder with dilute hydrochloric acid (D) Aluminium with dilute hydrochloric acid

A

A and C

B

B and C

C

A and B

D

A and D

Solution-1 containing 10% hydrochloric acid and 20% acetic acid at the rate F combines with Solution-2 containing 20% hydrochloric acid and 30% acetic acid at the rate D, the product formed contains 20% hydrochloric acid and 30% acetic acid at the rate P, how many independent equations containing F, D, and P are possible?

A

1

B

2

C

3

Match List-I with List-II and select the correct answer by using the codes given below the list: List-I (Name of Polymer) List-II (Uses) (a) Polystyrene (i) For making combs and computer discs (b) Polyvinyl Chloride (ii) As insulator, wrapping material and television cabinets (c) Urea-formaldehyde resin (iii) Manufacture of raincoats and vinyl flooring (d) Bakelite (iv) For making unbreakable cups and laminated sheets

A

(a) - (i), (b) - (iii), (c) - (iv), (d) - (ii)

B

(a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)

C

(a) - (ii), (b) - (iii), (c) - (i), (d) - (iv)

D

(a) - (ii), (b) - (iii), (c) - (iv), (d) - (i)

In a batch process, the reaction takes place in the presence of an acid medium. The acid is drained from the reaction vessel at the rate of 15ml/s as a result of the density difference of the acid from the reacting component. To avoid wastage of acid, it is recycled to an acid tank which has 1000 L capacity. The acid drained from the reaction vessel, picks up 50 g/L solids from the reactor. Acid is fed once again to the process from acid tank. When the process is started, the acid is almost pure in the tank as a result of filtration. As the reaction proceeds, acid in the tank gets more and more contaminated with the solids. The concentration of the solids should not exceed 100 g/L from the process point of view. The batch time is 16h. Estimate whether the concentration of the solids will exceed 100g/L during the batch reaction.

A

37.04 h

B

30.05 h

C

36.04 h

D

32.05 h

Which among the following statements is/are true? Exposure of silver chloride to sunlight for a long duration turns grey due to 1. the formation of silver by decomposition of silver chloride 2. sublimation of silver chloride 3. decomposition of chlorine gas from silver chloride 4. oxidation of silver chloride Select the correct answer using the codes given below.

A

Only 1

B

1 and 3

C

2 and 3

D

Only 4

E

None of the above/More than one of the above

Which of the following option is correct about the use of mineral acids? Sulphuric acid is used in the manufacture of fertilizers like ammonium sulfate, paints, dyes, chemicals. Nitric acid is used for making fertilizers like ammonium phosphate, explosives like TNT: Tri-Nitro Toluene, dyes, and plastics.

A

Option 1 is correct

B

Option 2 is correct

C

Both are correct

D

None is correct

Which of the following chemicals are used to treat the instruments made out of polymers? i) Ethylene Oxide ii) Hydrochloric Acid iii) Silver Cyanide iv) Ozone v) Bleach vi) Saline Solution vii) Sulphuric Acid viii) Glutaraldehyde and Formaldehyde ix) Phthalaldehyde x) Hydrogen Peroxide xi) Nitric Acid xii) Peracetic Acid xiii) Silver xiv) Formic Acid xv) Citric Acid

A

i, ii, iii, iv, v, vi

B

ii, iv, vi, viii, x, xii

C

i, iv, v, viii, ix, x, xii, xiii

D

iii, iv, ix, xii, xv

Fact 1: All dogs like to run.
Fact 2: Some dogs like to swim.
Fact 3: Some dogs look like their masters.

If the first three statements are facts, which of the following statements must also be a fact?
I: All dogs who like to swim look like their masters.
II: Dogs who like to swim also like to run.
III: Dogs who like to run do not look like their masters.

A

I only

B

II only

C

II and III only

D

None of the statements is a known fact.

E

None of the statements is a known fact.

A user type a content on 20 sheets, each sheet consist of 55 lines, and each line can have 66 characters. The content is again retyped on another set of sheets, these new sheets have 65 lines and each line can take 70 characters. Calculate the reduction in sheets ?

A

2 or 60%

B

4 or 20%

C

6 or 10%

D

8 or 5%

In a group, 29 people like to watch movies, 35 people like to watch web series and 34 people like to watch YouTube videos. Also, 13 people like to watch only movies, 21 people like to watch only web series and 15 people like to watch only YouTube videos. 4 of them like to watch only movies and web series. 3 of them like to watch movies, web series and YouTube videos as well. How many people like to watch both movies and YouTube videos?

A

7

B

12

C

14

D

3

Which of the following option is correct about the uses of Hydrochloric acid? It is used in making plastics like polyvinyl chloride (PVC). It is used for cleaning iron sheets before tin-plating or galvanization.

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